Interactive parameter estimation method of multi-input and multi-output system

A parameter estimation and multi-output technology, applied in the field of communication, can solve the problems of low transmission efficiency, high complexity and cost requirements, and achieve the effect of increasing transmission efficiency, reducing costs and saving costs

Inactive Publication Date: 2005-12-21
XIDIAN UNIV
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Problems solved by technology

[0011] The purpose of the present invention is to avoid the deficiencies of the above-mentioned prior art, and provide an iterative parameter estimation method for MI

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  • Interactive parameter estimation method of multi-input and multi-output system
  • Interactive parameter estimation method of multi-input and multi-output system
  • Interactive parameter estimation method of multi-input and multi-output system

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[0039] The present invention illustrates the specific process of channel parameter estimation by using an embodiment of a MIMO system with 4 transmitting antennas and 1 receiving antenna. The system has 4 frequency deviations ω 1，1 , Ω 1，2 , Ω 1，3 , Ω 1，4 Respectively: 0.02, 0.03, 0.01 and 0.015; the frequency deviation of the system is the relative frequency deviation, that is, the ratio of the absolute frequency deviation to the system data rate; the channel of the system is a Gaussian white noise channel, that is, 4 channel gains h 1，1 , H 1，2 , H 1，3 , H 1，4 Both are 1; the length of the training sequence is 32, and the signal-to-noise power ratio is 30dB.

[0040] Any pair of transceiver antennas in the MIMO system can be regarded as a single-input single-output SISO subsystem, so the MIMO system can be regarded as composed of 4 SISO subsystems. For the parameter estimation problem of the MIMO system, the parameters that need to be estimated are their respective channel gains...

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Abstract

Considering multiple input/ output communication system (MIMO) as composed of multiple sub single input/ output systems (SISO), the invention resolves issue of estimating parameters of MIMO system as estimating parameters of SISO system with interference. The disclosed method includes steps: approach of iteration interference cancellation is adopted for estimating parameters of SISO system with interference, i.e. after channel estimation and frequency deviation estimation, interference estimation is carried out first; then, using the approach of iteration interference cancellation carries out estimation for channel gain and frequency deviation, according to presetting number, iteration is carried out repeatedly so as to obtain final estimated value of channel gain and frequency deviation. Comparing the existed methods, the disclosed method possesses features of low complexity, high transmission efficiency, and low cost.

Description

technical field [0001] The invention belongs to the technical field of communication, relates to wireless communication signal processing, and relates to a method for estimating channel gain and frequency deviation of a multiple-input multiple-output system. technical background [0002] In the past ten years, information and communication technology and application systems have developed rapidly, showing unprecedented prosperity. The development of mobile communication, wireless communication, multimedia information service and the Internet has shown a bright prospect for anyone to exchange any kind of information at any time and any place. At the end of the 20th century, the wide application of Internet technology and people's increasing dependence on data transmission services impacted the development of third-generation mobile communication technology. As for future mobile communications, people have proposed the concept of super 3G or 4G, and many international standar...

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Application Information

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IPC IPC(8): H04L27/26
Inventor 李建东吕卓赵林靖庞继勇陈亮
Owner XIDIAN UNIV
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