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A Single-Ended Frequency-Domain Beam Search Method Using Compressive Sensing

A technology of compressed sensing and search methods, applied in radio transmission systems, electrical components, transmission systems, etc., can solve the problems of reducing the number of searches and the huge number of searches.

Inactive Publication Date: 2017-06-23
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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  • A Single-Ended Frequency-Domain Beam Search Method Using Compressive Sensing
  • A Single-Ended Frequency-Domain Beam Search Method Using Compressive Sensing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 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. When using the multi-task orthogonal matching pursuit algorithm, the threshold value α is 0.05, and CM4 is a non-line-of-sight channel with multiple multipaths.

[0054] Such as figure 2 As shown, the probability of success performance curve of 802.11.ad channel beam search, figure 2 The middle abscissa is the number of transmit beam vectors used by device 1 and the number of receive vectors used by device 2. The total number of searches is the product of the two. Under the condition that the signal-to-noise ratio is 0dB, each point is simulated 1000 times.

[0055] 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 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. The invention provides a method for searching an optimal beam vector by using a compressed sensing single-end frequency domain beam in a multi-antenna OFDM communication system. This method transforms the beam search problem into a compressed sensing problem by using the sparsity of the emission angle and the arrival angle, and uses different emission and reception vectors at the transmitting end and the receiving end, and the optimal transmitting / receiving beam vector is determined by the receiving end alone . The invention has a very wide application range and can be used in all slow-fading line-of-sight or non-line-of-sight channels.

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 Patents(China)
IPC IPC(8): H04B7/0413
Inventor 王梦瑶成先涛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA