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A signal detection method and device

A signal detection and equipment technology, applied in the field of communication, can solve problems such as unsatisfactory detection performance, difficulty in meeting system requirements, and low system detection efficiency, so as to improve realizability, reduce complexity and time, and improve detection performance Effect

Active Publication Date: 2015-09-30
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, signal detection methods include: linear detection method, nonlinear detection method and maximum likelihood detection method; wherein, the complexity of the linear detection method is simple, but its detection performance is not ideal; the detection performance of the nonlinear detection method is excellent It is better than the linear detection method, but it is difficult to meet the system requirements in engineering implementation; the maximum likelihood detection method can meet the system requirements of engineering implementation, but there is a problem of low detection efficiency in systems with higher modulation orders or more transceiver antennas

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  • A signal detection method and device
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Embodiment 1

[0025] Embodiment 1 of the present invention proposes a signal detection method, which is applied to a system including two transmit antennas and two receive antennas (such as the 2 transmit 2 receive system of LTE), and is used in the scenario of spatial multiplexing, such as figure 1 As shown, the signal detection method may include the following steps:

[0026] Step 101, select each constellation point in the modulation constellation diagram as the transmit symbol x of transmit antenna 1 respectively 1 , and use the V-BLAST algorithm to calculate x on the transmitting antenna 2 1 The corresponding send symbol x 2 .

[0027] In the embodiment of the present invention, each constellation point in the modulation constellation diagram is selected as the transmission symbol x of the transmitting antenna 1 1 , and use the V-BLAST algorithm to calculate x on the transmitting antenna 2 1 The corresponding send symbol x 2 , including but not limited to:

[0028] Step 1. Obtain...

Embodiment 2

[0053] Based on the same inventive concept as the above method, the embodiment of the present invention also proposes a signal detection device, which is applied to a system including two transmitting antennas and two receiving antennas, such as image 3 As shown, the signal detection equipment includes:

[0054] The calculation module 11 is used to select each constellation point in the modulation constellation diagram as the transmission symbol x of the transmission antenna 1 respectively 1 , and use the vertical layered space-time structure V-BLAST algorithm to calculate x on the transmitting antenna 2 1 The corresponding send symbol x 2 ; and, using the V-BLAST algorithm to calculate x 2 The corresponding send symbol x 1 ';

[0055] determination module 12, for when the x 1 with x 1 ’ equal, the (x 1 , x 2 ) T as a candidate sending vector;

[0056]The detection module 13 is configured to determine a candidate set S by using the candidate transmission vectors cal...

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Abstract

The invention discloses a signal detection method and signal detection equipment. The method includes: selecting constellation points in a modulation constellation diagram as transmitting symbols x1 of a transmitting antenna 1 respectively, and computing transmitting symbols x2, corresponding to the x1, of a transmitting antenna 2 by the aid of a V-BLAST (vertical bell labs layered space-time) algorithm; computing transmitting symbols x1' corresponding to the x2 by the aid of the V-BLAST algorithm; if the x1 is equal to the x1', using T (x1, x2) as candidate transmitting vectors; and determining a candidate set S by the candidate transmitting vectors obtained by computing the constellation points, and performing maximum likelihood signal detection in the candidate set S. The signal detection method and the signal detection equipment have the advantages that when the demodulation performance is guaranteed to be approximate to a maximum likelihood detection algorithm, detection complexity can be lowered while detection time can be shortened, the detection performance can be improved remarkably, and implementability in an actual system is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a signal detection method and equipment. Background technique [0002] In an LTE (Long Term Evolution, Long Term Evolution) system, a transmission mode of spatial multiplexing is adopted in the downlink to increase the data transmission rate. [0003] Spatial multiplexing means: the sending end sends different data streams through multiple transmitting antennas, and the receiving end receives through multiple receiving antennas. Therefore, at the receiving end, the signal received by each receiving antenna is the signal sent by all transmitting antennas at the sending end. A collection of responses after the wireless channel, so it is necessary to perform signal detection on the received signal to restore the most likely transmitted signal vector. [0004] In the prior art, signal detection methods include: linear detection method, nonlinear detection method and m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L1/00H04L27/34
Inventor 赵新雪肖维杰高强李琼任斌
Owner DATANG MOBILE COMM EQUIP CO LTD