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Fast iteration channel estimation method for encoding MIMO (Multiple Input Multiple Output) system

A channel estimation and coding technology, which is applied in channel estimation, baseband system, transmission system, etc., can solve the problem of long iterative update time, and achieve the effects of accelerating convergence to accurate values, simplifying channel estimation algorithms, and improving system performance

Active Publication Date: 2016-08-10
南京优牧大数据服务有限公司
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Problems solved by technology

Some of the existing studies directly use the RLS algorithm, and the iterative update time is longer; some use the more complex Kalman nonlinear estimator

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  • Fast iteration channel estimation method for encoding MIMO (Multiple Input Multiple Output) system
  • Fast iteration channel estimation method for encoding MIMO (Multiple Input Multiple Output) system
  • Fast iteration channel estimation method for encoding MIMO (Multiple Input Multiple Output) system

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0020] Such as figure 1 As shown, a fast iterative channel estimation method for a coded MIMO system includes the following steps:

[0021] Step 1, perform LS (least squares) channel estimation on the MIMO system according to the received signal and the pilot sequence.

[0022] Select a pilot sequence with an appropriate length, that is, the length of the pilot sequence is greater than the number of transmitting antennas × the number of multipaths, analyze the relationship between the received signal and the pilot signal, select several groups of received signals to combine, and obtain the corresponding matrix expression. LS channel estimation.

[0023] The expression of the received signal i...

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Abstract

The invention discloses a fast iteration channel estimation method for an encoding MIMO (Multiple Input Multiple Output) system. The method comprises the following steps: 1, performing LS channel estimation on the MIMO system according to a received signal and a pilot sequence; 2, feeding back a modulated signal recovered by turbo balance based on estimated channel information; 3, performing recursive adaptive channel estimation of RLS by taking the modulated signal as a known signal; and 4, repeating the step 2 to the step 3 by using the estimated channel information till selected turbo balance iteration times are reached. Through adoption of the method, a relatively good initial value is selected for future RLS adaptive channel estimation through simple LS estimation, and a process of converging a channel estimated value to an accurate value can be accelerated. Meanwhile, a channel estimation algorithm is simplified, and relatively good system performance is achieved.

Description

technical field [0001] The invention relates to a fast iterative channel estimation method for a coded MIMO system, belonging to the technical field of wireless communication. Background technique [0002] With the rapid development of mobile communication and Internet technology, the future wireless communication system requires not only high communication rate, but also various high-quality communication services. In order to obtain a high transmission rate, MIMO technology has attracted extensive attention of researchers once it was proposed, and has become an important physical layer transmission technology. [0003] On the other hand, in order to obtain reliable transmitted data, it is necessary for the receiver to accurately estimate the transmitted data using various signal processing techniques. Traditional communication systems consider channel equalization and channel decoding separately, which is relatively simple to deal with, but in fact, there is an internal r...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03
CPCH04L25/0204H04L25/023H04L25/03171
Inventor 居美艳李岳衡谭国平李黎
Owner 南京优牧大数据服务有限公司
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