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Space-time block coded spatial modulation method

A technology of space-time coding and spatial modulation, applied in the field of communication, to avoid interference between channels, improve performance, and improve spectral efficiency

Active Publication Date: 2018-06-29
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the current STBC-SM scheme still has certain limitations, especially the optimization of diversity gain needs further analysis and research

Method used

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Embodiment Construction

[0033] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0034] The technical scheme that the present invention solves the problems of the technologies described above is:

[0035] The block diagram of the transmitter of the newly proposed novel space-time block codedspatial modulation (NSTBC-SM) system based on spatial modulation is attached figure 1 As shown, the number of transmitting antennas of the system is N T , the number of receiving antennas is N R , input bit sequence U=(u 1 ,...,u k+l ) to obtain two subsequences, which are transmitted through T time slots, the k bits of subsequence 1 are used to select the combination of transmitting antennas, and then the corresponding space constellation matrix S is obtained, and the l bits of subsequence 2 ar...

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Abstract

The invention provides a space-time block coded spatial modulation method, belongs to the technical field of communication and is used for improving diversity gain of a system. The method comprises the steps that an input information bit sequence is allocated; space constellation matrix selection is carried out on a previous part of bits; constellation symbol mapping is carried out on a rear partof bits; modulated symbols are preprocessed through a P matrix to obtain new modulation symbols; cross processing is carried out on the new modulation symbols; a novel space-time block coded codewordmatrix X is obtained through coding; and the codewords C of a novel space-time block coded spatial modulation scheme are obtained; in order to ensure full diversity, corresponding phase rotation is carried out on transmitted codewords; the codewords are not overlapped with each other; and the full diversity space-time coded design is realized. According to the method, a single mapping symbol is coded and then is allocated to different transmitting antennas for transmission in a plurality of time slots, the diversity gain is clearly improved, and the bit error rate performance of the system isimproved.

Description

technical field [0001] The invention belongs to the field of communication technology, and relates to the channel coding design of the sending end in the spatial modulation (Spatial Modulation, SM) technology in a multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) system, especially based on the full score of the spatial modulation system Set of space-time coding design. Background technique [0002] In recent years, spatial modulation as a new type of MIMO transmission technology has been proposed and extensively researched. Different from traditional MIMO technology, SM can achieve higher spectral efficiency and lower radio frequency link requirements, reducing the MIMO system The complexity and cost overhead of the MIMO system are also avoided, such as antenna synchronization and inter-channel interference. [0003] SM can obtain a higher transmission rate, but only one antenna is active each time information is transmitted, failing to obtain diversity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00H04B7/0413H04B7/02
CPCH04B7/028H04B7/0413H04L1/0043H04L1/0618H04L1/0625H04L1/0637H04L1/0668
Inventor 李国权向国勇欧阳露徐勇军王家城林金朝庞宇周前能
Owner CHONGQING UNIV OF POSTS & TELECOMM
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