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Time-frequency dual-selection channel estimation method and device based on structured compressed sensing

A dual channel selection and compressed sensing technology, applied in the field of communication, can solve problems such as the increase of channel parameters to be estimated and the decrease of system spectral efficiency, and achieve the effect of low complexity and high spectral efficiency

Inactive Publication Date: 2018-08-24
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN +1
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Problems solved by technology

This will also greatly increase the parameters of the channel to be estimated on the time axis, which will also cause a decrease in the spectral efficiency of the system

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  • Time-frequency dual-selection channel estimation method and device based on structured compressed sensing
  • Time-frequency dual-selection channel estimation method and device based on structured compressed sensing
  • Time-frequency dual-selection channel estimation method and device based on structured compressed sensing

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Embodiment Construction

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0027] The following describes the time-frequency dual selection channel estimation method and device based on structured compressed sensing according to the embodiments of the present invention with reference to the accompanying drawings. Select the channel estimation method.

[0028] figure 1 It is a flowchart of a time-frequency dual selection channel estimation method based on structured compressed sensing according to an embodiment of the present invention.

[0029] Such as figure 1 As shown, the time-frequency dual selec...

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Abstract

The invention discloses a time-frequency dual-selection channel estimation method and device based on structured compressed sensing. The method comprises the following steps: performing, by a transmitting end, transmission by using orthogonal frequency division multiplexing OFDM, transmitting, and filling a time domain training sequence in the time domain, meanwhile setting a part of the subcarriers in the frequency domain as a frequency domain pilot group, and transmitting the frequency domain pilot group after analog processing; performing cross-correlation on the received training sequenceand the transmitted time domain training sequence to obtain position labels whose autocorrelation vectors are greater than a preset threshold so as to form non-zero set estimation of channel impulse response; performing frame reconstruction on a received OFDM frame and converting the received OFDM frame into a circular convolution for transmitting the OFDM frame and the channel impulse response; and obtaining an observation matrix according to a preset frequency domain pilot group, and estimating a time-frequency dual-selection channel by using non-zero subcarriers in the received pilot groupand a partial non-zero set of the channel impulse responses through the structured compressed sensing. The method has the characteristics of low complexity, high spectral efficiency and high precision.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a time-frequency dual-selection channel estimation method and device based on structured compressed sensing. Background technique [0002] With the continuous rise of communication technology in recent years, OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology has been greatly developed due to its low complexity, high spectral efficiency and ability to resist multipath channels. In order to prevent inter-block interference between two consecutive transmission blocks, it is usually necessary to add a GI (Guard interval, guard interval) between the two blocks. GI can be divided into: CP (Cyclic prefix, cyclic prefix), ZP (Zero Padding, zero padding) and TDS (Time Domain Synchronous, time domain synchronization) according to its type. The former two methods cannot perform channel estimation, and usually require an addition...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L27/26
CPCH04L25/0212H04L25/022H04L25/0242H04L27/2695
Inventor 杨昉马旭宋健张超
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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