Spatial modulation bit mapping method with low complexity

A space modulation and bit mapping technology, applied in the modulation carrier system, digital transmission system, electrical components, etc., can solve the problems of no feedback overhead, low computational complexity, etc.

Active Publication Date: 2019-09-06
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

BFM achieves performance close to the lower bound of BER in the case of high SNR, and has a lower computational complexity of O(K 2 ) and the lower feedback overhead is But the main problem of BFM algorithm is that there is almost no performance improvement under low SNR

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  • Spatial modulation bit mapping method with low complexity
  • Spatial modulation bit mapping method with low complexity
  • Spatial modulation bit mapping method with low complexity

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[0037] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, and Not all examples.

[0038] A low-complexity spatial modulation bit mapping method, comprising the following steps:

[0039] Step 1: at the transmitting end, sort the spatial modulation symbols;

[0040] Step 2: assigning the gray-coded bitmaps to the sorted spatial modulation symbols one by one in order;

[0041] Step 3: Divide the bit block corresponding to the spatial modulation symbol into antenna selection bits and amplitude-phase modulation bits;

[0042] Step 4: At the receiving end, the received signal is estimated by the maximum likelihood (ML) detection criterion.

[0043] Further, the received signal es...

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Abstract

The invention belongs to the technical field of mobile communication, and particularly relates to a spatial modulation bit mapping method with low complexity. The method comprises: at a transmitting end, sorting spatial modulation symbols, distributing bit mappings of Gray codes to the spatial modulation symbols in sequence according to the arrangement sequence, and then dividing bit blocks corresponding to the spatial modulation symbols into antenna selection bits and amplitude phase modulation bits; at a receiving end, estimating a received signal through a maximum likelihood detection criterion. According to the method, the performance of the multi-input multi-output system can still have a good effect under the condition of low complexity.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a low-complexity space modulation bit mapping method. Background technique [0002] In order to obtain a simplified receiving structure in a multiple input multiple output (MIMO) system, in current research, various schemes relying on spatial modulation (SM) are proposed. In traditional SM, only a single transmit antenna is activated in each slot, and the index of the activated antenna is also used to transmit additional information. As a MIMO transmission technology, SM can not only overcome the multipath interference problem of MIMO itself, but also reduce the complexity while ensuring the data rate and performance. [0003] Bit mapping is the process of assigning bit sequences to different symbols, and the choice of bit mapping affects the bit error rate (BER) performance of any modulation scheme. In the traditional amplitude-phase modulation (amplit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/34H04L27/36
CPCH04L27/3405H04L27/36
Inventor 李贵勇郑开放陈发堂李小文王华华
Owner CHONGQING UNIV OF POSTS & TELECOMM
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