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Signal detection method and device in multiple-input multiple-output system

A signal detection, multi-output technology, applied in transmission systems, multi-carrier systems, transmission monitoring and other directions, can solve the problems of increasing the difficulty of implementing the signal detection process and high computational complexity, reducing the difficulty of implementation and reducing the complexity of algorithms Effect

Inactive Publication Date: 2010-09-15
大唐联诚信息系统技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the inventor found in the research that: the tree search method using the breadth-first M algorithm is based on the symbol-level signal tree to search. In the case of high constellation dimensions, the computational complexity of the entire tree search process is high, and ultimately increases The implementation difficulty of the signal detection process

Method used

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  • Signal detection method and device in multiple-input multiple-output system
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Embodiment 1

[0019] see figure 1 , which is a flowchart of an embodiment of a signal detection method in a multiple-input multiple-output system of the present application, the method includes the following steps:

[0020] Step 101: Convert the constellation point of the quadrature amplitude modulation QAM transmission signal into the form of bit vector weighted sum, obtain the QAM transmission signal represented by the bit level, and convert the channel matrix into a composite according to the QAM transmission signal represented by the bit level channel matrix;

[0021] Step 102: Perform QR decomposition on the composite channel matrix to obtain an upper triangular matrix, and use the upper triangular matrix to construct a bit-by-bit layered tree structure;

[0022] Step 103: Applying the breadth-first M algorithm to search layer-by-layer the bit-by-bit layered tree structure to obtain a signal candidate set, and calculate the metric value of each candidate signal in the signal candidate...

Embodiment 3

[0120] Corresponding to the above signal detection method in a MIMO system, an embodiment of the present application further provides a signal detection device in a MIMO system. see Figure 5 , which is a structural diagram of an embodiment of a signal detection device in a multiple-input multiple-output system of the present application, and the device includes a conversion unit 501 , a decomposition unit 502 , a search unit 503 and a detection unit 504 . The internal structure and connection relationship of the device will be further introduced below in conjunction with the working principle of the device.

[0121] The conversion unit 501 is configured to convert the constellation point of the quadrature amplitude modulation QAM transmission signal into a form of bit vector weighted sum, obtain the QAM transmission signal represented by the bit level, and convert the channel matrix according to the QAM transmission signal represented by the bit level Convert to composite ch...

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Abstract

The embodiment of the invention discloses signal detection method and device in a multiple-input multiple-output system. The signal detection method comprises the following steps of: converting a constellation point of a quadrature amplitude modulation (QAM) transmitting signal into a bit vector weight sum form to obtain a bit-level-expressed QAM transmitting signal; converting a channel matrix into a compound channel matrix according to the bit-level-expressed QAM transmitting signal; carrying out QR decomposition on the compound channel matrix to obtain an upper triangular matrix; constructing a bit-by-bit layered tree structure by using the upper triangular matrix; searching the bit-by-bit layered tree structure layer by layer based on a breadth-first M algorithm to obtain a signal candidate set; calculating a measure value of each candidate signal in the signal candidate set; and calculating the posterior information of the transmitting signal by using the measure value. The embodiment of the invention can reduce the realization difficulty of a signal detection process.

Description

technical field [0001] The present application relates to the technical field of communication and computer, in particular to a signal detection method and device in a multiple-input multiple-output system. Background technique [0002] With the development of wireless communication technology, the MIMO (Multiple-Input Multiple-Out-put) technology using multiple antenna elements can greatly improve the frequency utilization of the system within a limited bandwidth due to making full use of space resources. Therefore, MIMO technology provides users with capacity potential that single-antenna technology cannot provide, and becomes an effective way to use spatial dimensions to improve system capacity and reliability. At present, MIMO technology has become one of the hot technologies in 3G or 4G. [0003] In a MIMO system, since the performance of the receiving end will greatly affect the transmission rate, bit error rate performance and system complexity of the entire transmis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/34H04B17/00H04B17/29
Inventor 杨远曹晏波乔元新王雪颜尧平
Owner 大唐联诚信息系统技术有限公司