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System, device and method for MIMO base band processing

A multiple-input multiple-output, baseband processing technology, applied in baseband system components, diversity/multi-antenna systems, space transmit diversity, etc., can solve the problems of high decoding complexity, impossible to use, etc., to achieve the best joint design performance , to avoid the effect of tedious repeated search

Active Publication Date: 2008-02-13
ALCATEL LUCENT SHANGHAI BELL CO LTD
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AI Technical Summary

Problems solved by technology

In the case of a small number of codewords, the computational complexity caused by this scheme may be tolerable
But for high-speed applications, it is basically impossible to use this scheme due to the high decoding complexity

Method used

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  • System, device and method for MIMO base band processing
  • System, device and method for MIMO base band processing
  • System, device and method for MIMO base band processing

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Embodiment Construction

[0040] The general idea of ​​the present invention is to provide a system for MIMO (Multiple Input Multiple Output) baseband processing, a device and method for transmitter baseband processing, and extendable to use by providing a joint design technique containing precoding and linear STBC It is a device for OFDM-MIMO broadband wireless communication system transmitter baseband processing to achieve a system with excellent performance and relatively simple structure and decoding.

[0041] One of the present invention is a device for baseband processing of a transmitter in a multiple input multiple output system.

[0042] Referring to FIG. 5, the device includes an adaptive space-time block encoder 11, a look-up table 12 that is generated offline according to the joint design standard for the adaptive space-time block encoder to query the joint weight matrix, and a quantization process connected to the receiver. The quantization processor 13 feeds back the quantized CSI to the look...

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Abstract

The invention relates to a multiple input and multiple output (MIMO) system, in particular to a MIMO system baseband processing system and a device and a method of a transmitter baseband processing. Therein, the transmitter baseband processing device comprises a self-adaptive space time block coder. The invention is characterized in that the self-adaptive space time block coder is a structure, which is formed by a combined design of a linear space time block code (STBC) and a pre-code. The invention also comprises an off-line look-up table, which is generated according to a combined design standard. The combined design standard is an upper limit sum of pairwise error probability (PEP) between a sending codeword and other codeword in a constellation set, which represents information delay and quantization error in a feedback channel state. The invention is provided with an off-line pre-code and linear STBC combined design coding design process and an effective realization of a transmission scheme through using the look-up table. Furthermore, the invention can adopt a gradient searching art, which uses a global data optimization algorithm SGA to substitute a local optimization algorithm. The invention can also avoid the redundant and repeated searches with different initialization.

Description

Technical field [0001] The present invention relates to a multiple input multiple output (Multiple Input Multiple Output, MIMO) system, in particular to a system for baseband processing of a multiple input multiple output system, and a device and method for transmitter baseband processing. Background technique [0002] In MIMO systems, the traditional method of using transmitter channel state information (CSI) is through adaptive precoding. Precoding can weight the transmitted signal to achieve constructive combination of signals and generate additional array gain, thereby increasing the chain Road capacity. [0003] Generally, under the ideal condition of infinitely accurate instant feedback, and the precoding is in the case of slow and smooth fading, a relatively non-feedback CSI system can provide a solid performance gain and achieve full diversity. [0004] However, precoding encounters some problems in practical applications, including channel changes during the feedback del...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04B7/06H04L1/06
Inventor 刘瑾
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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