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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 impossible use and high decoding complexity, and achieve the best joint design performance, Avoid the effect of tedious and repeated searches

Active Publication Date: 2012-07-25
ALCATEL LUCENT SHANGHAI BELL CO LTD
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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, an apparatus and method for transmitter baseband processing, and a system that can be extended to use A device for baseband processing of a wideband wireless communication system based on OFDM-MIMO 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 of a multiple-input multiple-output system.

[0042] see Figure 5 , the device comprises an adaptive space-time block encoder 11, a look-up table 12 generated offline according to a joint design standard for the adaptive space-time block encoder to query the joint weighting matrix, and a quantization processor 13 connected to the receiver, The quantization processor 13 feeds back the quantized CSI to the lookup table 12 via the feedback link 14 .

[0043] The adapt...

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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 (MIMO) system, in particular to a system for baseband processing of a multiple input multiple output system, and a device and method for baseband processing of a transmitter. Background technique [0002] In a MIMO system, the traditional method of utilizing the transmitter's channel state information (CSI) is through adaptive precoding, which weights the transmitted signal to achieve constructive combining of the signals, resulting in additional array gain, thereby increasing the chain road capacity. [0003] Generally, under the ideal condition of infinitely accurate instant feedback, precoding can provide robust performance gains and achieve full diversity relative to systems without feedback CSI in the case of slowly varying smooth fading. [0004] However, precoding encounters some problems in practical applications, including channel variation during feedback delay, bit error intr...

Claims

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Application Information

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