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Parallel and vertical layered time space detection method and device

A vertical layering and detection method technology, applied in the direction of error prevention/detection through diversity reception, space transmission diversity, code division multiplexing system, etc., can solve the problem of large processing delay

Inactive Publication Date: 2009-12-16
HUAWEI TECH CO LTD
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  • Application Information

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Problems solved by technology

[0040] (2) The V-BLAST method uses serial interference cancellation, and the processing delay is relatively large

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  • Parallel and vertical layered time space detection method and device
  • Parallel and vertical layered time space detection method and device
  • Parallel and vertical layered time space detection method and device

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Embodiment Construction

[0090] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0091] The invention adopts a multi-level parallel interference cancellation structure to realize the V-BLAST method. When performing each level of parallel interference cancellation processing, the received signal vector is detected, and more than one zero-forcing weight vector is calculated, and the estimated values ​​of all symbols are estimated according to the zero-forcing weight vector; then the estimated symbols are subjected to interference cancellation, Get M modified received signal vectors, and then perform symbol estimation again. Among them, the m-th modified received signal vector is obtained by excluding the m-th symbol and removing the interference of the remaining M-1 symbols from the received signal vector, and this signal vector is used as the m...

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Abstract

The invention discloses a parallel vertical layered space-time detection method, comprising: setting parallel interference cancellation series S, and S>1, and further comprising: A. calculating more than one zero-forcing weight vector according to channel matrix estimation; B. Calculate the estimated value of the symbol according to each zero-forcing weight vector, and perform interference cancellation on the estimated value of each symbol and the received signal vector to obtain the corrected received signal vector, and then use the corrected received signal vector as required For the detected received signal vector, perform step B, and after performing S-1 times of step B, turn to step C; C. detect the corrected received signal vector, and calculate the estimated value of each symbol according to the zero-forcing weight vector, as an estimate. At the same time, the invention also discloses a parallel vertical layered space-time detection device. The invention estimates all symbol values ​​at the same time, and then performs multi-stage parallel interference cancellation on the estimated value and the received signal vector, thereby improving symbol estimation performance, reducing processing time delay, and improving system capacity and rate.

Description

technical field [0001] The present invention relates to multiple input multiple output (MIMO, Multiple Input Multiple Output) technology in the field of wireless communication, in particular to a parallel vertical layered space-time detection method and device for a MIMO system. Background technique [0002] MIMO technology is a major technological breakthrough in the field of wireless communication. It can double the capacity and spectrum utilization of the communication system without increasing the bandwidth. MIMO technology uses multiple antennas (antenna arrays) at the transmitter and receiver to simultaneously transmit and receive signals. Since the signals transmitted simultaneously by each transmit antenna occupy the same frequency band, the communication bandwidth does not increase. A spatial channel exists between each transmit antenna and each receive antenna. If the channel impulse response of each spatial channel is independent, the MIMO system can create mult...

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Application Information

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IPC IPC(8): H04L1/06H04L27/18H04W84/02H04B7/08H04J13/02
Inventor 魏立梅
Owner HUAWEI TECH CO LTD