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Signal detection method for generalized spatial modulation (GSM) communication system

A technology of signal detection and communication system, applied in the field of signal detection of GSM communication system, can solve the problems such as the difficulty of applying maximum likelihood detection algorithm to communication system and the increase of complexity, and achieve the effect of reducing computational complexity and narrowing the search space.

Inactive Publication Date: 2017-06-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

By searching all possible transmitted signals, the maximum likelihood detection algorithm can achieve the optimal detection performance, however, its complexity increases exponentially with the combination of transmitting antennas and the modulation order
Therefore, in the case of a large number of transmitting antenna combinations or a high modulation order, the maximum likelihood detection algorithm will be difficult to apply to the actual communication system

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  • Signal detection method for generalized spatial modulation (GSM) communication system
  • Signal detection method for generalized spatial modulation (GSM) communication system
  • Signal detection method for generalized spatial modulation (GSM) communication system

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Embodiment Construction

[0053] Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail:

[0054] The present invention combines the compressed sensing technology and the maximum likelihood detection, and obtains the search space of the active antenna position in the transmitting antenna array in the GSM communication system through the compressed sensing technology Then perform MMSE detection in the search space. Compared with the overall search of ML detection, the present invention greatly reduces the search space of ML detection while achieving similar performance, thereby greatly reducing the computational complexity.

[0055] The present invention mainly comprises the following steps:

[0056] Step 1: Use the OMP algorithm to obtain the index order of the first antenna as follows:

[0057]

[0058] Let Λ 1 = l 11 , if l 11 Not part of valid antenna combination from l 1 found in l 1j , l 1j is l 1 The first one belongs to the eff...

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Abstract

The invention belongs to the field of wireless communication technology, and particularly relates to a signal detection method for a generalized spatial modulation (GSM) communication system. The method comprises the following steps: combining a compressed sensing technology with maximum likelihood detection, and adopting the compressed sensing technology to obtain the search space FORMULA of the activated antenna position in a transmitting antenna array in the GSM communication system; and then carrying out MMSE detection in the search space. Compared with the overall search of the ML detection, by adopting the signal detection method disclosed by the invention, the search space of the ML detection can be greatly reduced, and the computational complexity can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a signal detection method used in a GSM (generalized spatial modulation, generalized spatial modulation) communication system. Background technique [0002] 1. Compressed Sensing [0003] For an equation of the form y=θs+z, the signal s is sparse with K items, contains N elements and only K items are non-zero, and is an observation matrix of M×N size (M<N), with M×1 columns The vector y is the observation of the signal s and z is the noise vector. [0004] Compressed sensing technology can perfectly restore the sparse signal s with a high probability under the condition that the number of samples (observations) is much smaller than the number of samples (observations) required by traditional methods through a suitable observation matrix. The recovery signal is the signal reconstruction, which is mainly based on the norm solution of convex optimizat...

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Application Information

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IPC IPC(8): H04L1/00H04B7/08
CPCH04L1/0054H04B7/0854
Inventor 肖丽霞肖悦范世文陈昱树蒋兆翔
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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