CN1731702A - Wimax carrier frequency remote transmission method - Google Patents
Wimax carrier frequency remote transmission method Download PDFInfo
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- CN1731702A CN1731702A CN 200510041502 CN200510041502A CN1731702A CN 1731702 A CN1731702 A CN 1731702A CN 200510041502 CN200510041502 CN 200510041502 CN 200510041502 A CN200510041502 A CN 200510041502A CN 1731702 A CN1731702 A CN 1731702A
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Abstract
The invention relates to a method for wimax carrier frequency distance transmission, which can reduce the attenuation during transmission of source carrier frequency signals. The inventive method comprises steps of: completing source carrier frequency signal selection with near-end machine and lowering the amplified carrier frequency signal of near-end into middle frequency signal; amplifying the middle frequency signal, the amplified signal going through duplexer and transmitted with radio frequency cables; duplexer on far-end receiving the middle frequency signal and amplifying, promoting the signal into high frequency signal; transmitting the high frequency signal with antenna. The invention has the advantages of no need of high power radiation, no self-excitation and of good isolation and stability.
Description
Technical field
The present invention relates to a kind of method for transmitting signals, relate in particular to wimax carrier frequency remote transmission method based on IEEE 802.16 serial wireless standards.
Background technology
WiMAX (Worldwide Interoperability for Microwave Access, Chinese is translated into micro-wave access global inter communication) appearance of technology remedied defectives such as the Wi-Fi transmission range is short, coverage is little, as when the wimax frequency range is 20MHz, message transmission rate is the highest can to reach 75Mbps, and coverage up to 50 kilometers, simultaneously this speed is 30 times of the 3G broadband speeds that can provide,, this provides a kind of more superior solution for user increasing the message transmission rate demand and the network coverage.Existing wimax carrier-frequency range based on IEEE 802.16d/16e wireless access standard is between 2～11GHz, when signal transmits, transmit after directly the source CF signal being amplified, and under a such high frequency state, signal is decayed very obvious in the radio frequency cable transmission course, in order to guarantee to receive correct signal, usually the methods of taking to increase signal source carrier power and cable such as diameter overcome attenuation problem, and the signal source booster output strengthens, the cable overstriking will cause equipment cost, operating cost increases, the waste of the energy.
Summary of the invention
The purpose of this invention is to provide a kind of with low cost, stable wimax carrier frequency remote transmission method of transmission.
Technical scheme of the present invention is such: a kind of wimax carrier frequency remote transmission method, comprise that near end signal is handled, signal transmits, remote signaling is handled three parts, and described near end signal processing section comprises the steps:
A, the input wimax source CF signal amplify, the frequency of described source CF signal is between 2～11GHz;
B, the wimax source CF signal after amplifying is reduced to intermediate frequency by frequency converter;
C, the intermediate-freuqncy signal after the frequency reducing is carried out processing and amplifying;
D, the intermediate-freuqncy signal after the processing and amplifying is transported to radio frequency cable carries out remote transmission;
Described remote signaling processing section comprises the steps:
E, the intermediate-freuqncy signal that receives is carried out processing and amplifying;
F, the intermediate-freuqncy signal after the processing and amplifying is upgraded to high-frequency signal by frequency converter;
G, high-frequency signal is transported to antenna emission.
Preferred above-mentioned wimax carrier frequency remote transmission method, the frequency of source CF signal is between 2～6GHz among the described step a.
Preferred above-mentioned wimax carrier frequency remote transmission method, its frequency of the intermediate-freuqncy signal among the described step b after the frequency reducing is between 110MHz～450MHz.
The present invention is by reducing to intermediate-freuqncy signal to the former carrier frequency signal of near-end, carry out processing and amplifying again, intermediate-freuqncy signal after the processing and amplifying is transferred to far-end by radio frequency cable, far-end amplifies after receiving intermediate-freuqncy signal, and then raising frequency is a high-frequency signal, and intermediate-freuqncy signal signal attenuation in common radio frequency cable transmission is little, thereby can long-distance transmissions, reduced network coverage expense, and intermediate-freuqncy signal and source CF signal frequency difference are big, be not easy to produce self-excitation, improve the isolation and the stability of signal greatly, more can satisfy the requirement of user the Large Volume Data transmission.
Description of drawings
Fig. 1 is CF signal transfer process figure;
Fig. 2 near-end CF signal receives and transmission flow figure;
Embodiment
A specific embodiment of wimax carrier frequency remote transmission method is such: for being easier to understand method for transmitting signals of the present invention, present embodiment divides two parts to be described, the course of conveying (with reference to figure 1) of signal is described by first, and second portion is described near-end (or far-end) as the included functional module of signal processing.
With reference to figure 1, it is as 3.5GHz that the antenna of near end signal treatment facility receives the source CF signal, and this source CF signal is input to duplexer (can certainly be that other signal source is as LNA) from duplexer ANT port, exports from the TX port of duplexer again.The wimax source CF signal of coming out from port TX is enlarged into 5dBm, high-frequency signal after the amplification carries out down-converted through microwave converter, frequency after the frequency conversion is 110MHz, and then the intermediate-freuqncy signal after the frequency conversion is enlarged into 15dBm, is frequency 11OMHz, power is that the intermediate-freuqncy signal of 15dBm is input to duplexer, the outlet of duplexer ANT is connected with radio frequency cable, transfer to remote equipment by radio frequency cable, intermediate-freuqncy signal is received by the remote signaling treatment facility, the remote signaling treatment facility amplifies it after receiving intermediate-freuqncy signal, amplified IF signal is approximately 5dBm, this intermediate-freuqncy signal is carried out raising frequency through frequency converter handle, the frequency behind the raising frequency is 3.5GHz, and this high-frequency signal is amplified, signal after the amplification is 15dBm, is frequency 3.5GHz, power be the signal of 15dBm from the input of the RX port of duplexer, be transported to antenna from the ANT port of duplexer again and launch.In the above-described embodiments, the frequency of described intermediate-freuqncy signal is adjustable at 110MHz to 450MHz, obtains the frequency range that hope obtains by adjusting low-converter in gamut.
With reference to figure 2, for being implemented in the carrier frequency remote transmission method of the foregoing description, described near end signal treatment facility comprises following a few part: duplexer 1, duplexer 2, high-frequency amplifier 3, high-frequency amplifier 4, frequency converter 5, frequency converter 6, intermediate frequency amplifier 7, intermediate frequency amplifier 8, the ANT port of described duplexer 1 is connected with antenna, the TX port of duplexer is connected with the input of high-frequency amplifier 3, the output of high-frequency amplifier 3 is connected with the input of frequency converter 5, the output of frequency converter 5 is connected with the input of intermediate frequency amplifier 7, the output of intermediate frequency amplifier 7 is connected with the RX port of duplexer 2, the ANT port of duplexer 2 is connected with cable, the TX port of duplexer 2 is connected with intermediate frequency amplifier 8 inputs, the output of intermediate frequency amplifier 8 is connected with the input of frequency converter 6, the output of frequency converter 6 is connected with the input of high-frequency amplifier 4, the output of described high-frequency amplifier 4 is connected with the RX port of duplexer 1, it is the preceding processing of transmission that whole near end signal treatment facility comprises CF signal, also comprise the processing that CF signal receives, the remote signaling treatment facility is the same with the said equipment simultaneously, and the signal handling equipment of each point forms a network coverage on the network like this.
Claims (3)
1, a kind of wimax carrier frequency remote transmission method comprises that near end signal is handled, signal transmits, remote signaling is handled three parts, it is characterized in that:
Described near end signal processing section comprises the steps:
A, the input wimax source CF signal amplify, the frequency of described source CF signal is between 2～11GHz;
B, the wimax source CF signal after amplifying is reduced to intermediate frequency by frequency converter;
C, the intermediate-freuqncy signal after the frequency reducing is carried out processing and amplifying;
D, the intermediate-freuqncy signal after the processing and amplifying is transported to radio frequency cable carries out remote transmission;
Described remote signaling processing section comprises the steps:
E, the intermediate-freuqncy signal that receives is carried out processing and amplifying;
F, the intermediate-freuqncy signal after the processing and amplifying is upgraded to high-frequency signal by frequency converter;
G, high-frequency signal is transported to antenna emission.
2, wimax carrier frequency remote transmission method as claimed in claim 1, the frequency that it is characterized in that source CF signal among the described step a is between 2～6GHz.
3, wimax carrier frequency remote transmission method as claimed in claim 1 is characterized in that its frequency of the intermediate-freuqncy signal after the frequency reducing is between 110MHz～450MHz among the described step b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510041502 CN1731702A (en) | 2005-08-10 | 2005-08-10 | Wimax carrier frequency remote transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510041502 CN1731702A (en) | 2005-08-10 | 2005-08-10 | Wimax carrier frequency remote transmission method |
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| CN1731702A true CN1731702A (en) | 2006-02-08 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008055383A1 (en) * | 2006-11-09 | 2008-05-15 | Zte Corporation | Umts-based dsl access system and method |
| CN101202556B (en) * | 2007-06-06 | 2011-05-04 | 安徽四创电子股份有限公司 | Wimax wideband wireless communication radio frequency system |
| CN101242282B (en) * | 2008-02-14 | 2012-01-04 | 中国科学院计算技术研究所 | An user access device and wireless LAN system including this device |
| CN102625477A (en) * | 2012-04-01 | 2012-08-01 | 河北人天通信技术有限公司 | 3G (third-generation) broadband digitalized super-remote wireless transmission system |
| CN103220687A (en) * | 2013-04-11 | 2013-07-24 | 四川邮科通信技术有限公司 | Multi-standard type category 5 cable home-entry covering system |
| CN106341162A (en) * | 2015-07-07 | 2017-01-18 | 华为技术有限公司 | Communication method and equipment |
-
2005
- 2005-08-10 CN CN 200510041502 patent/CN1731702A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008055383A1 (en) * | 2006-11-09 | 2008-05-15 | Zte Corporation | Umts-based dsl access system and method |
| CN101202556B (en) * | 2007-06-06 | 2011-05-04 | 安徽四创电子股份有限公司 | Wimax wideband wireless communication radio frequency system |
| CN101242282B (en) * | 2008-02-14 | 2012-01-04 | 中国科学院计算技术研究所 | An user access device and wireless LAN system including this device |
| CN102625477A (en) * | 2012-04-01 | 2012-08-01 | 河北人天通信技术有限公司 | 3G (third-generation) broadband digitalized super-remote wireless transmission system |
| CN103220687A (en) * | 2013-04-11 | 2013-07-24 | 四川邮科通信技术有限公司 | Multi-standard type category 5 cable home-entry covering system |
| CN106341162A (en) * | 2015-07-07 | 2017-01-18 | 华为技术有限公司 | Communication method and equipment |
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