U,S! mobile operator AT & T and Verizon. said recently that due to the growing mobile data usage! the future will face the problem of lack of wireless spectrum, and therefore hope the U,S, government to assign more spectrum resources, But now with the number of companies being developed to more spectrum-efficient technology. the tension of spectrum resources is expected to be completely rewritten!
These new technologies has been strong support, A president by Google, Microsoft executives and other industry recommended that the Commission will this month submit a report to explore the use of computerized radio technology to enhance the efficiency of spectrum use,A report in May! the commission said that the new technology will allow the U.S, federal agencies and other organizations with mobile operators to share spectrum resources, and is expected to spectrum use efficiency increased by 4 times!
One is mentioned in the report of the technique is known as cognitive radio (cognitive radio) that the phone can automatically search for the available radio spectrum, then select one of the best take advantage of, For example. the Government set aside for an Air Force bombing training base part of the spectrum, but one day the base does not have any bombing training! cognitive radio technology allows mobile search to the open channel and converted to the channel,A U,S, company called XG Technology developed for the military a cognitive radio technology can be used for military bases communication, This technology makes it possible to scan the channel open and clear the busy channel interference. allowing more people to use at the same time!
XG vice president of marketing Rick Rotondo (Rick Rotondo) compared the technology with noise-canceling headphones! Noise-canceling headphones can receive buy two way radios noise. and then create a noise signal corresponding to! in and out of noise. Similar XG cognitive radio technology is able to receive interference, then the algorithm to calculate the ways to eliminate interference,
Mobile operators over the past few years have been warning the government that the future may be facing a "spectrum crisis" - that is, the growing demand for wireless data will ultimately make spectrum resources depleted! The operators claim. which will reduce the connection speed of mobile devices! hinder economic development. The report, however! suggests that if the Government to promote the new technology adopted by operators to improve spectrum efficiency! spectrum tense situation will be alleviated,
xG CEO John Cole door (John C! Coleman), the operators spectrum resources concern is real, because the operators to use the technology will eventually lead to a shortage of spectrum, However! he said the new technology will solve this problem,
The spectrum crisis can be avoided completely. "Cole door said." If we are now beginning to cognitive radio and smart antenna system has proved to be feasible advanced technology, we are able to go beyond mobile broadband demand curve to stay ahead,
This area also includes a number of other companies. such as the development of cognitive radio systems for U,S. Department of Defense Shared Spectrum Company, as well as with the development of cognitive radio technology commercialization projects Cognitive Radio Technologies.
Mobile industry veteran who has been involved in the world's first mobile phone Martin Cooper (Martin Cooper! a former Motorola executive), expressed support for the cognitive radio technology! He has said that the cognitive radio technology will eventually become the answer to solve the wireless industry growth pains,
"Recommended by the commission is the technology of the past 20 years I have been advocating," cheap two way radios he said, "This technology has been understood by the industry,"
Cooper said that even if the Government approves more spectrum to operators can not guarantee the high data traffic by the the extra spectrum sufficient to handle the growing number of smart phones and tablet PCs.
Operators are able to secure up to a 20% increase in the frequency spectrum resources, but can not fundamentally solve the problem, because the future needs of spectrum resources than they are now 20 times more. "he said." They do not want to use an existing advanced technology. and the technology had already appeared as early as 10 years ago! "
The large operators seems to be any technology that could change the status quo are very vigilant, U,S. Cellular Telecommunications Industry Association (CTIA) on behalf of the carrier's wireless industry associations. The association said that its members are very excited about the concept of spectrum sharing, but currently the most important issue facing government should allocate more spectrum to operators!
CTIA vice president of regulatory affairs Chris Gutman McBee (Chris Guttman-McCabe) said that his skeptical of cognitive radio technology. because the technology has not been used for commercial purposes. and is not yet clear that this technology can whether it has become a national solution,
CTIA said that even if the technology described in the report to improve spectral efficiency thousands of times, the association is still hope that the Government will clear the lower utilization of the spectrum. so that more spectrum is available!
But if the new technology is able to provide such a high efficiency. why operators also need more spectrum? Gutman said McBee, it is unclear who will share spectrum with federal agencies, as well as the number of operators can use the spectrum, He said discount two-way radios that the wireless industry still tend to have more of their own spectrum,
"It is our fervent hope that the Government will clear the idle spectrum and resources to share out," Gutman said McBee!
President Obama chooses to adopt newer technologies to share spectrum, but the introduction of new technologies or take some time, For example. in order to allow the cognitive radio technology has been applied on the mass market, the smartphone needs to be equipped with more advanced antenna and circuitry, to search for the channel to load lighter,
Cognitive radio is just one of several techniques to improve wireless spectrum, Cooper said he was more confident smart antennas and other short-term solution, Traditional base station antenna to the energy emitted in all directions, smart antennas can be directly sent to the mobile phone energy. in order to reduce congestion,
There is also a wireless network operators are testing technology is the home base station (femtocell) (also known as the small base station). Home base station can be purchased by the consumers themselves and placed in the home. it will call and data transfer to a broadband connection, thereby enhancing the cell phone signal,U.S, Federal Communications Commission (FCC) Chairman Julius Julius Wagner Koski (Julius Genachowski) last month said in a CTIA conference, the small base station will be a key means to meet the growing demand for mobile data, because they allow operators more intensive base station coverage.
Small base stations is significant, "he said in a keynote speech, the small base stations revolution will promote the Wi-Fi industry has undergone tremendous change over the next few years!"
FCC will take measures to free up a spectrum band for operators to install a small base station to facilitate and reduce the pressure of the operators spectrum band!
The difference between simple concept of amateur radio / professional radio / radio
Radio is not to say! to listen to other launch pad out signal, usually Radio FM (FB) / amplitude modulation (AM) in two parts. two different modulation methods, corresponding to the radio . these forms of modulation! we used to support the 430MHz segment FM radio! air traffic control between 110MHz to 130MHz frequency, the AM modulation mode! Then, some simple difference buy two way radios between "amateur radio professional radio
A layer of meaning that amateur radio support amateur band radio - support (included) 430MHz ~ 440MHz band radio! professional radio is another layer of meaning to support some other specific band radio amateur radio functions focus on "play" adjustments, including the various relevant parameters to adjust the transmit power signal frequency / / Search storing a plurality of different frequency / frequency manually save changes / adjust the squelch value / signal intensity tables, professional radio pay more cheap two way radios attention to stability, so the complexity of the operation is relatively low. and durability / stability of the transmission power of the battery performance requirements higher!
Need to use a computer and special software and connection to adjust contrast, professional radio is usually not at liberty to adjust the transmit power / frequency search function / can store a small amount of frequency and can only display channel number can not display the value of the frequency / stored in each channel frequency and discount two-way radios related functions / usually there is no signal strength meter and professional radio might also designed to increase security measures such as FM, or support the function of the cluster (I know not many ) you want to transport JC armed JC what they take a stand, to know which is the switching volume, according to which words! screwed to a few channels squadron! a few channels total station would be finished, if you take a fancy amateur radio to JC, Paul! he will not use,
Radio is not to say! to listen to other launch pad out signal, usually Radio FM (FB) / amplitude modulation (AM) in two parts. two different modulation methods, corresponding to the radio . these forms of modulation! we used to support the 430MHz segment FM radio! air traffic control between 110MHz to 130MHz frequency, the AM modulation mode! Then, some simple difference buy two way radios between "amateur radio professional radio
A layer of meaning that amateur radio support amateur band radio - support (included) 430MHz ~ 440MHz band radio! professional radio is another layer of meaning to support some other specific band radio amateur radio functions focus on "play" adjustments, including the various relevant parameters to adjust the transmit power signal frequency / / Search storing a plurality of different frequency / frequency manually save changes / adjust the squelch value / signal intensity tables, professional radio pay more cheap two way radios attention to stability, so the complexity of the operation is relatively low. and durability / stability of the transmission power of the battery performance requirements higher!
Need to use a computer and special software and connection to adjust contrast, professional radio is usually not at liberty to adjust the transmit power / frequency search function / can store a small amount of frequency and can only display channel number can not display the value of the frequency / stored in each channel frequency and discount two-way radios related functions / usually there is no signal strength meter and professional radio might also designed to increase security measures such as FM, or support the function of the cluster (I know not many ) you want to transport JC armed JC what they take a stand, to know which is the switching volume, according to which words! screwed to a few channels squadron! a few channels total station would be finished, if you take a fancy amateur radio to JC, Paul! he will not use,
Car and hand sets. walkie-talkie radio, usually referred to is actually radio, in the name! there is usually a lot of misunderstanding, for example. many people think that "walkie-talkie" pairs children. or that "radio" how esoteric things! in fact! very easy to understand - you car filled with the sound of the radio portion Walkman radio, in fact. are a large class of things, translated into English! call RADIO! but we are talking about the stations usually both receive and transmit functions can be used to transmit radio signals conventional communication tools to contact with buy two way radios other people,
1 What is radio?
For frequency / frequency / channel. to speak briefly think about 97!4103,9MHz usually listen to! is the frequency, the frequency may also channel a little far-fetched. but often there is "Channel 103.9! 97,4 Channel "is a bit misleading suspects.
Fact mm listen to the broadcast radio, but that is "Radio Stations" launching, radio power Deals, transmitting antenna position Deals, Deals wide coverage! so it covered within the scope of the receiver (that is! the radio ) can be received signal! and converted into sound play out! Now imagine you and your friends car / hands have a radio cheap two way radios (radioreceiver) micro Radio (radiotransmitter)! is being discussed radio. Both transmit and receive at the same time. so you can talk to each other. 2, the frequency / frequency / band
Music station frequency 93.1MHz 91.6MHz traffic frequency 438!500MHz Beijing radio amateurs can legally use the transmitting and receiving frequency (400MHz band! and then the other bands there are the amateur HAM legal frequency without further ado)! Obviously! the frequency modulation (FM) radio does not support more than 430 MHz receiver (if the FM part is between 86MHz ~ 107MHz), so if you want to transmit and receive signals on the frequency of 438.500MHz have discount two-way radios to have a dedicated device , that is, we need to usually referred to "support the amateur bands car / hand sets / base station! etc! If 438,500 is the frequency of words! then it is at the same time belongs to the 430 MHz band of! we probably to 430,000 to 439,999 called amateur 400M band. also called amateur 70cm (cm) band! is the wavelength to say. because this band mainly is assigned to amateur radio enthusiasts. Primary HAM more contact there may be! we often say "2 meter band" or called "140 MHz amateur bands 144,000MHz ~ 145,999MHz! HAM can use the frequency range,
1 What is radio?
For frequency / frequency / channel. to speak briefly think about 97!4103,9MHz usually listen to! is the frequency, the frequency may also channel a little far-fetched. but often there is "Channel 103.9! 97,4 Channel "is a bit misleading suspects.
Fact mm listen to the broadcast radio, but that is "Radio Stations" launching, radio power Deals, transmitting antenna position Deals, Deals wide coverage! so it covered within the scope of the receiver (that is! the radio ) can be received signal! and converted into sound play out! Now imagine you and your friends car / hands have a radio cheap two way radios (radioreceiver) micro Radio (radiotransmitter)! is being discussed radio. Both transmit and receive at the same time. so you can talk to each other. 2, the frequency / frequency / band
Music station frequency 93.1MHz 91.6MHz traffic frequency 438!500MHz Beijing radio amateurs can legally use the transmitting and receiving frequency (400MHz band! and then the other bands there are the amateur HAM legal frequency without further ado)! Obviously! the frequency modulation (FM) radio does not support more than 430 MHz receiver (if the FM part is between 86MHz ~ 107MHz), so if you want to transmit and receive signals on the frequency of 438.500MHz have discount two-way radios to have a dedicated device , that is, we need to usually referred to "support the amateur bands car / hand sets / base station! etc! If 438,500 is the frequency of words! then it is at the same time belongs to the 430 MHz band of! we probably to 430,000 to 439,999 called amateur 400M band. also called amateur 70cm (cm) band! is the wavelength to say. because this band mainly is assigned to amateur radio enthusiasts. Primary HAM more contact there may be! we often say "2 meter band" or called "140 MHz amateur bands 144,000MHz ~ 145,999MHz! HAM can use the frequency range,
Radio direction finding is an activity. its value is reflected in two aspects, First, the specific value, other social value! 1, radio direction finding social value is infinite
Radio direction finding can be reflected in the school "quality education"; "rejuvenating the country through science and education" strategy can be reflected in the education of science and technology; reflect the "fitness" program buy two way radios on physical fitness; services to meet people's cultural needs in the entertainment , Therefore. the social value of radio direction finding is unlimited. '
Radio direction finding is a very specific activities. but it can create endless. boundless variety of brands! Can be combined with the history, combined with the future; small can to a one, to the whole world; society from the hands of all the modern cheap two way radios communication tools! to the the invisible air boundless wave; from in front of a particular job. to the needs of various industries. Radio direction finding activities can create unlimited brand! Radio direction finding activities in any brand can demonstrate its presence. 2. the specific value of the radio direction finding frugal
Reflected in transport to do specific activities and competitions! radio direction finding requires low levels of funding! discount two-way radios but they can create large benefits, so it is a business interest. National sports tender general meeting in 1996, well-known in the Olympics has not been present at the meeting businessmen recognition, radio direction finding national championship first tender. Businesses that radio direction finding modest investment, but it can get greater benefits, why not. The specific value of the radio direction finding presents tremendous opportunities and fun,
Radio direction finding can be reflected in the school "quality education"; "rejuvenating the country through science and education" strategy can be reflected in the education of science and technology; reflect the "fitness" program buy two way radios on physical fitness; services to meet people's cultural needs in the entertainment , Therefore. the social value of radio direction finding is unlimited. '
Radio direction finding is a very specific activities. but it can create endless. boundless variety of brands! Can be combined with the history, combined with the future; small can to a one, to the whole world; society from the hands of all the modern cheap two way radios communication tools! to the the invisible air boundless wave; from in front of a particular job. to the needs of various industries. Radio direction finding activities can create unlimited brand! Radio direction finding activities in any brand can demonstrate its presence. 2. the specific value of the radio direction finding frugal
Reflected in transport to do specific activities and competitions! radio direction finding requires low levels of funding! discount two-way radios but they can create large benefits, so it is a business interest. National sports tender general meeting in 1996, well-known in the Olympics has not been present at the meeting businessmen recognition, radio direction finding national championship first tender. Businesses that radio direction finding modest investment, but it can get greater benefits, why not. The specific value of the radio direction finding presents tremendous opportunities and fun,
Use the intercom will not have radiation problems?
Answer: The design of the walkie-talkie in line with the relevant provisions of the Ministry of Information Industry [2001] No! 869 document! does not harm the human body! not close to the body and the use of walkie-talkie call, but call 5-7 cm away from your body, buy two way radios
: Walkie-talkie can call?
Answer: network support! intercom can be used to call! However! if only the conventional call between the stand-alone, it can not achieve the function call,
Question: why the use of walkie-talkie frequency limit?
Answer: call undisturbed and rational use of frequency resources to ensure that the vast majority of users. the management committee of the national cheap two way radios radio station frequency use by the provisions of different industries using the corresponding frequency range! The user would like to buy a walkie-talkie, local radio management committee for the frequency!
Question: walkie-talkie antenna Note?
Answer:
Only use the the HYT wife or approved antenna, Unauthorized antennas! the antenna of the modified or added accessories may damage the transceiver or a discount two-way radios breach of the provisions of the Radio Administration Bureau of the Ministry of Information Industry;
2 when in use! do not pick up the antenna by hand;
Walkie-talkie antenna can not twist when it launched in easy to power tube burned out;
Do not use a damaged antenna, Launch. if the damaged antenna contacts skin. it may cause minor burns.
Answer: The design of the walkie-talkie in line with the relevant provisions of the Ministry of Information Industry [2001] No! 869 document! does not harm the human body! not close to the body and the use of walkie-talkie call, but call 5-7 cm away from your body, buy two way radios
: Walkie-talkie can call?
Answer: network support! intercom can be used to call! However! if only the conventional call between the stand-alone, it can not achieve the function call,
Question: why the use of walkie-talkie frequency limit?
Answer: call undisturbed and rational use of frequency resources to ensure that the vast majority of users. the management committee of the national cheap two way radios radio station frequency use by the provisions of different industries using the corresponding frequency range! The user would like to buy a walkie-talkie, local radio management committee for the frequency!
Question: walkie-talkie antenna Note?
Answer:
Only use the the HYT wife or approved antenna, Unauthorized antennas! the antenna of the modified or added accessories may damage the transceiver or a discount two-way radios breach of the provisions of the Radio Administration Bureau of the Ministry of Information Industry;
2 when in use! do not pick up the antenna by hand;
Walkie-talkie antenna can not twist when it launched in easy to power tube burned out;
Do not use a damaged antenna, Launch. if the damaged antenna contacts skin. it may cause minor burns.
Different the dedicated radio with the public phone network, the use of mobile phones belonging to communicate with each other in private, dedicated radio with group call (pre-loaded) and group call scheduling functions; use from the operating point of view! the phone call! required by the number of numbers a communication object to communicate dedicated radio just press a transmitter button (PTT) can be realized on a single or multiplayer call; from an economic perspective! the phone call (intelligent network except internal call). and radio stations pay national frequency resources fees just a one-time investment, long-term benefit; cell towers in areas not covered or communication dead! radio is more prominent advantages, Due to buy two way radios the above-mentioned characteristics of the radio station, its application areas and the use of a very wide range, But many people lack the basic knowledge on radio regulations, which entered some errors. now listed several common myths phenomenon for the legitimate use of radio to report the world,
Myth # 1: arbitrarily set to use radio
Radio talking about here! mainly refers to the personal use of hand-held radios and car radio; Do not think to buy radio stations can be installed radio, To know how to, any radio signals transmitted must be occupied by a radio frequency, just as each set of radio programs alone as a frequency. if the illegal occupation of the radio frequency form of radio interference, cheap two way radios Radio frequencies and land, minerals, is an important national resource. managed by the state, In accordance with the Radio Regulations of the People's Republic of China "issued by the State Council and the Central Military Commission, set up and use radio must be to the local radio management organizations submit a written application, be approved and issued a radio license! in order to legitimate and proper use,
Amateur radio communication network set up and use the main body of the radio station. should be a member of the Chinese Radio Sports Association! Application settings using the individual amateur radio, in accordance with existing regulations! must first apply to join the Chinese Radio Sports Association to become a member, participate in discount two-way radios relevant regulations and common sense training and examinations amateur radio operating certificate! certificate book is intended to be used for examination to the local radio management organizations radio equipment and applying for a radio license, specific practices. procedures can be downloaded from the Chinese Radio Sports Association website or consult your local radio management organizations,
Private radio communications network set up and use the radio to the name of the unit to the local radio management organizations apply for the use of their own or that group dedicated frequency, Frequency resources fees, equipment testing. etc, related expenses paid in accordance with national regulations! Endorsed dedicated frequency interference from other radio business, you can appeal to the radio management departments to seek protection!
Myth # 1: arbitrarily set to use radio
Radio talking about here! mainly refers to the personal use of hand-held radios and car radio; Do not think to buy radio stations can be installed radio, To know how to, any radio signals transmitted must be occupied by a radio frequency, just as each set of radio programs alone as a frequency. if the illegal occupation of the radio frequency form of radio interference, cheap two way radios Radio frequencies and land, minerals, is an important national resource. managed by the state, In accordance with the Radio Regulations of the People's Republic of China "issued by the State Council and the Central Military Commission, set up and use radio must be to the local radio management organizations submit a written application, be approved and issued a radio license! in order to legitimate and proper use,
Amateur radio communication network set up and use the main body of the radio station. should be a member of the Chinese Radio Sports Association! Application settings using the individual amateur radio, in accordance with existing regulations! must first apply to join the Chinese Radio Sports Association to become a member, participate in discount two-way radios relevant regulations and common sense training and examinations amateur radio operating certificate! certificate book is intended to be used for examination to the local radio management organizations radio equipment and applying for a radio license, specific practices. procedures can be downloaded from the Chinese Radio Sports Association website or consult your local radio management organizations,
Private radio communications network set up and use the radio to the name of the unit to the local radio management organizations apply for the use of their own or that group dedicated frequency, Frequency resources fees, equipment testing. etc, related expenses paid in accordance with national regulations! Endorsed dedicated frequency interference from other radio business, you can appeal to the radio management departments to seek protection!