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Method for signal testing of distributed type multiinput-multioutput system

A multi-input multi-output, signal detection technology, applied in the field of communication, can solve the problem of out-of-sync signals at the receiving end

Inactive Publication Date: 2008-03-05
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

[0020] The task of the present invention is to provide a general signal detection method suitable for distributed multiple-input multiple-output (abbreviation: MIMO) system, that is, the detection method of the present invention can effectively It solves the problem of out-of-sync signal at the receiving end caused by distributed time delay, and converts the signal detection problem of distributed MIMO system into the signal detection problem of centralized MIMO, so that various detection methods of existing mature centralized MIMO can be applied to In distributed MIMO system

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  • Method for signal testing of distributed type multiinput-multioutput system
  • Method for signal testing of distributed type multiinput-multioutput system
  • Method for signal testing of distributed type multiinput-multioutput system

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Embodiment Construction

[0115] A specific embodiment of the present invention is as follows, the parameter setting does not affect the generality, assumes that the data of the data source adopts BPSK modulation, and the number of transmitting antennas M T =4, the number of receiving antennas M R = 4, M T transmit antennas are randomly distributed in the cell, M R The receiving antennas are fixed on the same mobile station.

[0116] The channel model does not consider path fading and shadow fading, but only considers the influence of small-scale fading on the signal. m T transmit antennas distributed in the cell, M R The receiving antenna is fixed on the mobile station, and the transmitting end is not coded. The source bit stream is divided into M after modulation T Road symbol flow and from the corresponding M T transmit on a transmit antenna. Assuming that the wireless environment is sufficiently diffused, different transmit antennas experience independent Rayleigh fading from one receive an...

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Abstract

This invention provides a test method for general signals of distribution MIMO system, which matches and filters the received signals then samples the filtered signals, since each signal transmitted on the antenna is divided into a serial with the length of S=2L+1 and signals on MTasynchronous emission antennas can be equivalent to S*MT equivalent synchronous transmission signals and the equivalent signals after that can be processed by the existed centralized MIMO signal test method.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to the signal detection technology of a multi-antenna system in the communication technology. Background technique [0002] Research on information theory shows that multipath scattering channels have a huge theoretical capacity. In an environment with rich multipath components, the MIMO (Multiple In Multiple Out) system can make full use of multipath components. Foschini et al. first proposed A Diagonally Bell LabsLayered Space-Time Wireless Communication Architecture (D_BLAST) used in a multi-antenna system is proposed. Both the transmitter and receiver use a multi-antenna structure, and the transmitted information is carried out according to the diagonal Space-time coding, in an independent Rayleigh fading environment, this structure has obtained a huge theoretical capacity, and its capacity increases linearly with the number of transmitting antennas, which can reach 90% of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04H04L1/06
Inventor 田斌唐友喜孔婷赵宏志
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA