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Method for searching double-end time-domain wave beams by aid of compressed sensing

A technology of compressed sensing and search methods, applied in multi-frequency code systems and other directions, can solve the problems of reducing the number of searches and the huge number of searches.

Inactive Publication Date: 2014-12-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The staged beam search strategy can greatly reduce the number of searches, but when the antenna array is large, the number of searches required is still huge

Method used

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  • Method for searching double-end time-domain wave beams by aid of compressed sensing
  • Method for searching double-end time-domain wave beams by aid of compressed sensing
  • Method for searching double-end time-domain wave beams by aid of compressed sensing

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Embodiment 1

[0054] The total number of subcarriers is 512, the sampling frequency is 1GHz, both device 1 and device 2 have 20 antennas, and the number of beams in the codebook is 40. When constructing the dictionary, the interval is 5 degrees. CM4 is a non-line-of-sight channel with multiple multipaths.

[0055] Such as figure 2 As shown, the probability of success performance curve of 802.11.ad channel beam search, figure 2 The middle abscissa and the abscissa are the repeated measurement times for each device receiving each time. Under the condition that the signal-to-noise ratio is 0dB, each point is simulated 1000 times.

[0056] according to figure 2 It can be seen that the probability of success increases with the number of measurements.

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Abstract

The invention belongs to the technical field of wireless communication, and particularly relates to a method for searching the optimal wave beam vectors by the aid of compressed sensing. The method is applied to multi-antenna orthogonal frequency division multiplexing (OFDM) communication systems. The method is applied to searching the optimal wave beam vectors by the aid of compressed sensing double-end time-domain wave beams in the multi-antenna OFDM communication systems. The method has the advantages that wave beam searching is converted into compressed sensing by the aid of the sparsity of departure angles and arrival angles, the compressed sensing is combined with the symmetry of communication channels, and accordingly the optimal emission and receiving wave beam vectors can be determined by the aid of the repeated iteration method.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method for searching an optimal beam vector by using compressed sensing in a multi-antenna Orthogonal Frequency Division Multiplexing (OFDM) communication system. Background technique [0002] UWB system and 60GHz system are mainly used for short-distance high-speed transmission, and have a wide range of applications, including wireless personal area network (WPAN, Wireless Personal Area Network), wireless high-definition multimedia interface, medical imaging, vehicle radar and so on. In order to meet the needs of high data rate and high system capacity, etc., UWB systems and 60GHz systems often use multi-antenna multi-carrier technology for data transmission. [0003] Multiple antenna technologies include multiple input multiple output (Multiple Input Multiple Output, MIMO), multiple input single output (Multiple Input Single Output, MISO) and single...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 成先涛王梦瑶
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA