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Space-time block coding system signal transmission and reception method

A space-time block coding and system signal technology, applied in the field of communication, can solve the problem of high complexity and achieve the effect of low complexity

Active Publication Date: 2019-11-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even if the channel information is fully known, the complexity of ML detection is extremely high

Method used

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  • Space-time block coding system signal transmission and reception method
  • Space-time block coding system signal transmission and reception method
  • Space-time block coding system signal transmission and reception method

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Embodiment Construction

[0027] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] Assuming that the channel remains constant over a period of time, the signal transmitted during that period traverses the same channel on each receive antenna. Since the noise obeys the CSCG distribution, the signal received on the receiving antenna obeys the multi-dimensional CSCG distribution under the condition that the transmitted symbols are known. Considering all the signals received in this short period of time, which obey the Gaussian mixture model, the received signals corresponding to the same transmitted symbol can be clustered into the same category by clustering the Gaussian mixture model formed by the received signals. The correspondence between the label information and the clustering categories is used to indicate the corresponding transmission symbols of each category, and then the received signal is judged to recove...

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Abstract

The invention belongs to the technical field of communication, and specifically relates to a signal sending and receiving method of an STBC (Space-time Block Coding) system. In order to solve the problem that the traditional channel detection based STBC system cannot carry out channel estimation without a long pilot frequency, the scheme of the invention is to directly cluster received signals and carry out category labeling by utilizing labeled symbols to further recover the sent symbols. The signal sending and receiving method of the STBC has the beneficial effects that, in comparison with the traditional technology, the method does not need the channel estimation and realizes MLD at relatively low complexity.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a signal sending and receiving method of a space-time block coding system. Background technique [0002] STBC (Space-time Block Coding, space-time block coding) is a multi-antenna system that uses multiple transmitting antennas to improve data transmission reliability. STBC and its variants have been widely used in wireless communication systems, such as WiFi, LTE, etc. The traditional STBC system needs to send pilot signals (Pilot Symbols) through the transmitter to enable the receiver to perform channel estimation, so that the receiver can use channel information to perform decoupling maximum likelihood detection (MLD) to recover the transmitted symbols. Due to the existence of noise, channel information can be estimated more accurately only by using a longer pilot signal. However, even if the channel information is fully known, the complexity of ML detectio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04B7/0413
CPCH04B7/0413H04L1/0052H04L1/0054
Inventor 梁应敞黄雨迪张倩倩
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA