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A receiving method and device for a multiple-input multiple-output orthogonal frequency division multiplexing system

An orthogonal frequency division and receiving device technology, applied in the field of space-time processing, can solve the problems of increase, increase of training sequence period, unrealistic estimation, etc.

Inactive Publication Date: 2011-11-30
ZTE CORP
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Problems solved by technology

However, on the one hand, as the number of transmitting antennas and receiving antennas increases, the period of the training sequence used for channel estimation will increase, thereby reducing the efficiency of the system, and at the same time, the computational complexity of channel estimation will be greatly increased due to the increase of links ; On the other hand, it is unrealistic to estimate channel state information in fast fading environment or large Doppler frequency shift

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  • A receiving method and device for a multiple-input multiple-output orthogonal frequency division multiplexing system
  • A receiving method and device for a multiple-input multiple-output orthogonal frequency division multiplexing system
  • A receiving method and device for a multiple-input multiple-output orthogonal frequency division multiplexing system

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] In order to overcome the performance loss caused by fast-fading channels to unitary space-time coding, the transmission method of differential unitary coding based on space-frequency block interleaving, and combining the channel coding theory with differential space-time modulation technology, can obtain the condition of no channel information Under the greater channel capacity and better system performance. The present invention will propose a receiving and detecting method and device suitable for this transmission technology.

[0026] At the receiving end, first recover the space-frequency block interleaving performed by the sending end, and then the receiving device according to the received two continuous matrices Y τ and Y τ-1 Perform non-coherent detection. According to the channel assumption: the channel remains unchanged in T ≥ 2M symbol per...

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Abstract

The invention discloses a receiving method and device for a MIMO system, aiming at improving the signal receiving performance of the MIMO system. The main steps of the receiving method are: performing the received time domain Perform fast Fourier transform transformation on the information; perform matrix deinterleaving processing on the information transformed by the fast Fourier transform, merge the receiving sub-matrix Yk with the same subscript k into an equivalent receiving matrix and obtain the equal receiving matrix on the adjacent subcarriers Under the action of external information, the valence receiving matrix performs coherent detection on the sum; decodes the result of the coherent detection, and outputs the decoding result. The invention reduces the influence brought by channel fast fading.

Description

technical field [0001] The invention relates to space-time processing technology in the field of mobile communication, in particular to a receiving method and device for a Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) system. Background technique [0002] In recent years, various theoretical studies have shown that the space-time signal processing technology of the multiple-input multiple-output system with multiple antennas at the transmitting end and the receiving end can meet the requirements of high data rate and high frequency spectrum for various multimedia services in future wireless mobile communications. performance requirements. Various space-time coding schemes, such as space-time block codes, space-time trellis codes, etc., have made full use of multi-antenna technology to increase the capacity of the system. Most space-time coding schemes must use pilot signals to accurately estimate channel state information (CSI, Chan...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L1/06
Inventor 郝东来冯康王衍文支周
Owner ZTE CORP
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