Method for detecting signal in multi-antenna digital communication system

A communication system and multi-antenna technology, which is applied in the field of signal detection, can solve the problems of increasing the complexity of detection signal algorithms, achieve the effects of reducing computational complexity, simplifying computational complexity, and improving computational stability

Inactive Publication Date: 2008-05-07
倪受能
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, when the number of transmitting antennas gradually increases and more Alamouti space-time block codes need to be transmitted, more detection sequences need to be traversed, so more estimates of transmitted symbols need to be calculated, and the algorithm for detecting signals is complex degree is further improved

Method used

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  • Method for detecting signal in multi-antenna digital communication system
  • Method for detecting signal in multi-antenna digital communication system
  • Method for detecting signal in multi-antenna digital communication system

Examples

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Embodiment 1

[0090] In Embodiment 1, the transmitting end transmits two groups of symbols, and each group of symbols is converted into a channel signal by channel coding with an Alamouti space-time block code encoder. Assume that the transmitter has 4 transmit antennas, and each 2 transmit antennas transmit a set of Alamouti space-time block codes respectively, where each set of Alamouti space-time block codes is a channel obtained by channel encoding two symbols through an Alamouti space-time block code encoder Signal; the receiving end has 2 transmitting antennas, and the 2 transmitting antennas at the receiving end receive all channel signals transmitted by the transmitting antenna of the transmitting end, and detect all symbols transmitted by the transmitting antenna of the transmitting end. figure 2 It is a flow chart of detecting signals in Embodiment 1, including the following steps:

[0091] Step 201: The receiving end receives two sets of channel signals respectively transmitted ...

Embodiment 2

[0140] Embodiment 2 provides a method for detecting signals using received signals received by N receiving antennas at the receiving end when 2L+K transmitting antennas at the transmitting end transmit L groups of Alamouti space-time block codes plus K groups of symbols. Among them, 2L transmit antennas transmit L groups of Alamouti space-time block codes obtained by channel coding L groups of symbols through an Alamouti space-time block code encoder, and K transmit antennas directly transmit K groups of symbols. image 3 Before detecting the signal in this embodiment, recursively P 1 / 2 The flow chart of the initial value includes the following steps:

[0141] Step 301: After receiving the L groups of Alamouti space-time block codes and K groups of symbols respectively transmitted by the transmitter from 2L+K transmit antennas, the receiving end obtains N received signals, and performs channel estimation based on the received signals to obtain a single symbol A channel matrix...

Embodiment 3

[0232] In the second embodiment, when seeking P corresponding to all transmitted symbol groups 1 / 2 In the recursive process of the initial value, that is, in each recursion of step 303 and step 306, there is a step of finding the square root of a real number, and there is a serial relationship between this step and other steps, that is, it must be in this After the steps are completed, the following steps can be performed. In order to avoid the negative impact of the above steps of finding the square root of real numbers on other steps, P 1 / 2 The initial value can also be deduced by another method. Embodiment three is given below, and the use of LDL is given T Decomposition Factor Recursion P 1 / 2 method for the initial value.

[0233] Embodiment three:

[0234] Embodiment 3 also provides a method for detecting signals by using received signals received by N receiving antennas at the receiving end when 2L+K transmitting antennas at the transmitting end transmit the L group...

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Abstract

The present invention discloses a method for detecting the signal in the multi-antenna digital radio communication system; after the emitting terminal in the MIMO system codes the emitted symbols, the symbols reach the receiving terminal through at least one emitting antenna and two different channels; the method for the receiving terminal to detect the symbols emitted by the emitting terminal comprises that the receiving terminal obtains at least two receiving signals and estimates the channel to obtain the channel matrix; and then with the channel matrix, the factorized matrix of the estimated error and covariance of the symbols emitted by the transmitting terminal in the pattern of recursion is calculated, and then based on the obtained factorized matrix, the symbols are detected. With the method disclosed by the present invention, the calculation complexity for detecting signal can be reduced.

Description

technical field [0001] The invention relates to signal detection technology, in particular to a method for detecting signals in a multi-antenna digital communication system. Background technique [0002] A multi-antenna digital communication system refers to a multiple-input multiple-output (MIMO) digital communication system. MIMO technology refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and receiving end respectively, and signals are transmitted and received through multiple antennas at the transmitting end and receiving end. receive, thereby improving the data transfer rate or bit error rate. [0003] The transmit antenna used in the MIMO technology can be a physical antenna or a virtual antenna. In 3GPP TR 25.876 V1.7.1, the technology of virtual antenna (Virtual Antenna) is proposed, which provides multiple virtual antenna ports to transmit signal s 1 ,s 2 ,...,s M After being sent to each virtual antenna port, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02H04B7/26H04B17/00
CPCH04B7/04
Inventor 朱胡飞
Owner 倪受能
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