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A kind of interleaving method used in wlan frequency hopping system

A technology of sending end and signal source, applied in the direction of transmission system, digital transmission system, electrical components, etc., can solve problems such as too simple design, unsatisfactory anti-interference effect, etc., to increase complexity, improve anti-interference performance, and relax the system The effect of complexity requirements

Inactive Publication Date: 2011-12-28
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The existing interleaving technology can significantly reduce the complexity, but because its design is too simple, the anti-interference effect is not ideal

Method used

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  • A kind of interleaving method used in wlan frequency hopping system
  • A kind of interleaving method used in wlan frequency hopping system
  • A kind of interleaving method used in wlan frequency hopping system

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Embodiment

[0024] Taking a WLAN frequency hopping system with monotone interference as an example, the specific implementation process of the present invention will be described.

[0025] The single-tone interference frequency offset of the above-mentioned WLAN frequency hopping system with single-tone interference is 400,000 Hz, the interference power coefficient is 0.011, and the noise is Gaussian white noise.

[0026] Step 1. Use a random sequence for the source symbols of the WLAN frequency hopping system, send a total of 100,000 points, and send 1000 bits for each frequency point, and send a total of 100 times; perform channel coding on this source symbol, and the channel coding adopts (31, 25 ) RS coding, the rate after coding is 50kbps;

[0027] Step 2, sending the signal after RS ​​channel coding to the parameter P=41 prime number matrix interleaver for interleaving;

[0028] The specific implementation rules of the prime number sequence are as follows:

[0029] A prime number ...

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Abstract

The invention relates to an interlacing method used for a WLAN frequency hopping system, and belongs to the communication signal processing technology field. An information sequence is converted into an m*n matrix, according to a matrix size of a signal sequence, a prime code matrix of an appropriate dimension is generated, according to a prime code matrix sequence the signal sequence is subjected to interlacing, and after prime code interlacing the signal sequence is converted into a signal sequence and is sent. After receiving the signal sequence, a receiving terminal converts the signal sequence into an m*n matrix with a same dimension of the sending terminal, the signal sequence is subjected to deinterlacing by using a prime code matrix which is synchronous with the sending terminal, and the signal sequence after deinterlacing is converted into a signal sequence used for post processing. The method is flexible in realization, and when a series of errors appear, error code resistance performance which exceeds error correction capability of an error correction code can be improved; the method has a good inhibition effect on single-tone interference; situations of high time-delay and large memory space in the prior art are improved, and anti-interference performance of frequency hopping communication is improved.

Description

technical field [0001] The invention relates to an interleaving method used in a WLAN frequency hopping system, belonging to the technical field of communication signal processing. Background technique [0002] In recent years, the market potential of wireless broadband Internet access is huge, and wireless LAN, as an important part of broadband wireless network, has broad application prospects. In the physical layer of the wireless local area network standard IEEE 802.11, it is defined that RF transmission adopts spread spectrum modulation technology, and the working frequency range is 2.4000~2.4835GHz. The carrier frequency is controlled by a pseudo-random code, and its frequency changes randomly within its operating bandwidth. The frequency at the receiving end also changes randomly and remains consistent with that at the transmitting end. For cost considerations, commercial frequency hopping systems have relatively slow hopping speeds, generally below 50 hops / second. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/715H04B1/7156H04L1/00
Inventor 卢继华周荣花卜祥元安建平李祥明王爱华刘珩孙磊张宇黄承飞黎悟渊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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