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Combined signal detection and channel estimation method in MIMO relay system

A joint signal and relay system technology, applied in channel estimation, transmission system, baseband system, etc., can solve the problems of not fully utilizing the advantages of the PARAFAC model

Inactive Publication Date: 2017-10-24
YUXI NORMAL UNIV +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for joint signal detection and channel estimation in a MIMO relay system, aiming to solve the problem of using a source to transmit a channel training method, which still needs to send a channel training sequence, and does not fully utilize the PARAFAC model advantage

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[0040] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] 1. System model

[0043] 1.1 Two-hop AF relay

[0044] figure 1 It is a block diagram of a two-hop AFMIMO relay system, which includes a source, a relay, and a new sink; the source, relay, and new sink are respectively configured with M s , MR and M D The root antenna, the relay adopts the amplification and forwarding method, with are the channel matrices from the source to the relay and from the relay to the sink respectively, assuming the channel H (SR) and H (RD) Bo...

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Abstract

The present invention discloses a combined signal detection and channel estimation method in a MIMO relay system, The combined signal detection and channel estimation method in the MIMO relay system includes that an ALS algorithm is adopted to fit a constructed PARAFAC model; a receiving end knows an extended code matrix C, and C is a Vandermonde matrix; for two unknown loading matrixes, one of the matrixes is updated in one step, the estimated matrix is taken as the initial value of a matrix to be estimated, and the successive alternant iteration updating is carried out until the convergence. Compared with a conventional channel estimation method and an existing PARAFAC model channel estimation method, the method provided can effectively estimate the signals without transmitting the channel training sequence and can estimate the CSI of the relay system channel at the same time.

Description

technical field [0001] The invention belongs to the technical field of MIMO relay systems, in particular to a joint signal detection and channel estimation method in the MIMO relay system. Background technique [0002] MIMO relay technology can expand the network coverage, overcome the shadow effect, and improve the effectiveness and reliability of the communication system, which has become a research hotspot in the field of wireless communication. For the MIMO relay system, the relay usually adopts three strategies: amplification and forwarding (AF), decoding and forwarding (DF) and compression and forwarding (CF), among which the AF strategy is widely used because of its simple implementation. At present, there are a lot of researches on MIMO relay, such as relay channel capacity analysis, optimal power allocation and duality analysis, etc., all of which are carried out under the assumption that the exact CSI is known. But in actual communication, the CSI of the channel i...

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Application Information

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IPC IPC(8): H04L25/02H04L25/03H04B7/0413
CPCH04B7/0413H04L25/0204H04L25/03305
Inventor 仲涛王俊峰周红明刀学龙张苹珍王蕊
Owner YUXI NORMAL UNIV
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