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Enhanced six-dimensional 64PSK constellation-based orthogonal frequency division multiplexing method

A 64PSK, orthogonal frequency division technology, applied in the field of orthogonal frequency division multiplexing, can solve the problem of upper limit of frequency band utilization

Inactive Publication Date: 2015-04-01
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

However, for the binary coding scheme, its frequency band utilization has an upper limit. To improve the frequency band utilization, a high-order modulation scheme is required

Method used

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  • Enhanced six-dimensional 64PSK constellation-based orthogonal frequency division multiplexing method
  • Enhanced six-dimensional 64PSK constellation-based orthogonal frequency division multiplexing method
  • Enhanced six-dimensional 64PSK constellation-based orthogonal frequency division multiplexing method

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with drawings and embodiments.

[0045] The technical scheme that the present invention adopts for solving its technical problem is: provide a kind of orthogonal frequency division multiplexing method based on enhanced six-dimensional 64PSK constellation, comprise modulation method and demodulation method:

[0046] (1) Modulation method comprises the following steps:

[0047] (1-1) For a string of bit stream input information x b , perform serial / parallel conversion on it to divide it into N parallel bit streams consisting of 6-bit symbols, each parallel bit stream is represented by x b,k Indicates that 0≤k≤N-1;

[0048] (1-2) For parallel connection x b,k , and map the first 3 bit symbols in its 6 bit symbols to the three-dimensional 8PSK signal modulation constellation diagram represented by a three-dimensional Cartesian coordinate system: the current three symbols are 000, 011, 101, 110, 001, 01...

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Abstract

The invention relates to the technical field of wireless communication, and particularly relates to an enhanced six-dimensional 64PSK constellation-based orthogonal frequency division multiplexing method. According to the enhanced six-dimensional 64PSK constellation-based orthogonal frequency division multiplexing method, a two-dimensional constellation mapping-based orthogonal frequency division multiplexing technology is expanded to a six-dimensional signal space; and under a same average power, the enhanced six-dimensional 64PSK constellation-containing orthogonal frequency division multiplexing technology is capable of enlarging the minimum Euclidean distance between signal points in the signal space so as to obtain relatively high demodulation gain and bandwidth efficiency. Experiments prove that compared with the traditional orthogonal frequency division multiplexing technology, the method has lower bit error rate, so that an orthogonal frequency division multiplexing technology which is higher in speed and more reliable is provided to the future wireless sensor network physical layer protocol design.

Description

technical field [0001] The invention relates to an orthogonal frequency division multiplexing method based on an enhanced six-dimensional 64PSK constellation, and belongs to the technical field of wireless communication. Background technique [0002] Wireless sensor network has always been a very important part of communication, but power and bandwidth greatly affect its application and development. Power utilization describes the ability to transmit digital signals correctly at low power. All kinds of noise and interference in the wireless channel make the already fragile signal even more unrecognizable, so it is very necessary to improve the means of transmitting signals more effectively and correctly at low power, and the corresponding coding and modulation schemes emerge as the times require. When comparing the effectiveness of different communication systems, we should not only look at their transmission rate, but also consider the occupied frequency band bandwidth, be...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/263H04L27/3405H04L27/3483
Inventor 陈分雄付杰袁学剑王典洪刘乔西颜学杰王勇
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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