OFDM optical fiber wireless communication method and system based on IRA codes

A wireless communication system and wireless communication technology, applied in the direction of optical fiber radio, multi-frequency code system, baseband system components, etc., can solve the problems of limiting signal transmission bandwidth, shortening signal transmission distance, and reducing carrier-to-noise ratio, etc. Peak-to-average power ratio, extended transmission distance without repeaters, and performance-enhancing effects
CN103259598AInactive Publication Date: 2013-08-21GUILIN UNIV OF ELECTRONIC TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
GUILIN UNIV OF ELECTRONIC TECH
Publication Date
2013-08-21
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses an OFDM optical fiber wireless communication method and system based on IRA codes. IRA encoding is firstly carried out on bit information of an OFDM transmitter provided with an IRA encoder, OFDM selective mapping modulation is then carried out on the bit information of the OFDM transmitter provided with the IRA encoder, and data which are modulated are used as channel observed values by an OFDM receiver provided with the IRA decoder to carry out IRA iterative decoding. The OFDM optical fiber wireless communication method and system based on the IRS codes has the advantages that compared with other channel encoding, the IRA codes are better in performance, and decoding complexity is lower. In addition, an accumulator in the IRA encoding is a linear feedback shift register and can be used as a scrambler, a selective mapping technology is further combined, the peak average power ratio of OEDM can be effectively lowered, the non-relay transmission distance of signals is prolonged, and the system performance is greatly improved.
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Description

technical field

[0001] The present invention relates to the field of optical fiber wireless communication (Radio over Fiber, RoF) based on coded OFDM, in particular to an OFDM optical fiber wireless communication method and system based on IRA (Irregular Repeat Accumulate, Irregular Repeat Accumulate) code. Background technique

[0002] With the rapid development of communication technology, high-speed broadband and highly mobile communication methods have become an urgent need for people, so people gradually shift their attention to millimeter wave communication. Due to the large loss of the millimeter wave signal in the air, it is not suitable for long-distance transmission, so people have proposed optical fiber wireless communication. The central idea of ​​the optical fiber wireless communication system is to modulate high-frequency microwave and millimeter-wave signals onto light, transmit them to the base station using optical fibers, and then perform photoelectric conv...

Claims

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