Method for channel estimation in multi-antenna system

A multi-antenna system and channel estimation technology, applied in the field of broadband mobile communication systems, can solve problems such as performance loss

Active Publication Date: 2005-10-26
HUAWEI TECH CO LTD
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Problems solved by technology

A coherent receiver needs to know the impulse response coefficient of the channel at the receiving end, so it needs to estimate the channel at the receiving end; a non-coherent receiver does not need to know the impulse response coefficient of the channel at the receiving end, but requires the transmitted signal to be orthogonal Modulation method, and there will be 3-4dB loss in performance

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  • Method for channel estimation in multi-antenna system
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  • Method for channel estimation in multi-antenna system

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[0028] In order to make the purpose, technical solutions and advantages of the present invention clearer, the implementation of the technical solutions will be further described in detail below in conjunction with the accompanying drawings:

[0029] At the sending end, the optimal cyclic orthogonal pilot sequence in the sense of least squares (LS) is constructed by using the discrete Fourier transform (DFT) matrix, and it is intermittently inserted into the transmitted data to form a double-cycle slot structure; At the receiving end, using the characteristics of cyclic orthogonal sequences, the optimal least squares channel estimation in the sense of minimum mean square error (MMSE) is performed with low implementation complexity, and the rapid realization of channel estimation is performed by using the decomposition of the receiving pilot matrix , using the discrete cosine transform (DCT) for more accurate channel estimation and noise variance estimation in the pilot segment, ...

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Abstract

A channel calculation method in a multi-antenna system is related to a pilot design and channel calculation method of a multi-antenna system under a double-selected decline channel environment. At the sending end, the discrete Fourier transformation matrix is used to set up the optimum circulation orthogonal pilot sequence of the least square to be inserted into the sending data interleave to constitute double circulate time slot structure, at the receiving end, the circulation orthogonal property is utilized to carry out the least square channel calculation of the least mean square error, the resolving of the received pilot matrix is used to realize the channel calculation quickly and discrete cosine transformation is used to carry out more accurate channel calculation and noise variance calculation of the pilot band to obtain the calculation of the data band channel parameters with the interpolates of its domain.

Description

technical field [0001] The invention relates to a broadband mobile communication system for transmitting high-speed data by using multiple sending / receiving antennas, in particular to a method for pilot design and channel estimation of a multi-antenna system in a dual-selective fading channel environment. Background technique [0002] In order to meet the needs of future development, the ultra-third-generation mobile communication system must be able to: support all-IP high-speed packet data transmission, with a data rate of tens of megabits per second (bit per second) or even hundreds of megabytes of bps; support high terminal mobility, mobile speed Up to hundreds of kilometers per hour; supports high transmission quality, and the bit error rate of data services is lower than 10 -6 ;Provide high spectrum utilization rate, more than several bits per hertz; provide high power efficiency, reduce transmission power by more than 10dB; effectively support changes in large dynamic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
Inventor 高西奇尤肖虎江彬潘志文
Owner HUAWEI TECH CO LTD
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