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Spatial modulation detection method based on reliability judgment

A detection method and spatial modulation technology, applied in the direction of preventing/detecting errors through diversity reception, baseband system components, shaping networks in transmitters/receivers, etc., to achieve the effect of reducing complexity

Inactive Publication Date: 2015-05-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a reliability judgment detection method for SM system aiming at the extremely high complexity of the ML detection method

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  • Spatial modulation detection method based on reliability judgment
  • Spatial modulation detection method based on reliability judgment
  • Spatial modulation detection method based on reliability judgment

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Embodiment Construction

[0026] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0027] In order to describe the present invention better, the terms used in the technical solution of the present invention and the transmitter structure of the spatial modulation system are introduced first.

[0028] Spatial modulation: eg figure 1 As shown, b is the bit data to be transmitted, which can be regarded as an L×T-dimensional matrix, where L=log 2 M+log 2 N t is the number of bits carried by an SM modulation symbol, and M is the quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM) order. It is not difficult to see that the number of bits th...

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Abstract

The invention belongs to the technical field of communication anti-interference, and provides a spatial modulation detection method based on reliability judgment in allusion to the problem that an ML detection method in a spatial modulation system is very high in complexity. The spatial modulation detection method comprises the following steps: performing reliability judgment on a hard decision signal by using a threshold; when the hard decision signal is lower than the threshold, deciding that the hard decision signal is reliable and is a modulation signal, wherein a corresponding index position is an activated antenna position; when the hard decision signal is higher than the threshold, deciding that the hard decision signal is unreliable, and reducing the detection complexity by an HL-ML method with relatively high performance on the premise of ensuring BER performance of a system. By the spatial modulation detection method, performance of maximum likelihood detection can be approximately reached, the complexity can be significantly reduced, and relatively good compromise between the bit error rate performance and the complexity can be achieved.

Description

technical field [0001] The invention belongs to the technical field of communication anti-jamming, relates to spatial modulation (Spatial Modulation, SM) technology, HL-ML (Hard-Limiter based ML) detection algorithm, MIMO (Multiple Input Multiple Output) and other technologies, specifically a reliability-based Decision-making spatial modulation detection method. Background technique [0002] MIMO modulation technology is a high-speed transmission technology in a wireless environment. It configures more antenna units at the transmitting end and / or receiving end, and combines advanced space-time coding modulation schemes. By making full use of the degree of freedom of space, it can Brings additional diversity, multiplexing and beamforming gains. Recently, SM technology has been proposed as a new modulation technique as a new MIMO modulation scheme. The basic principle of this technology is to transmit information bits by activating different antennas and using the antenna in...

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Application Information

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IPC IPC(8): H04L1/06H04L25/03
Inventor 王顺顺尹露肖悦何旭
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA