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Transmitting diversity method and MIMO communication channel

A communication system and transmit diversity technology, which is applied in the field of space-correlated MIMO communication systems, can solve the problems of transmit diversity performance deterioration, reduce the effective multiplicity of transmit diversity, and reduce the MIMO channel of the antenna, so as to improve wireless communication performance and transmit diversity performance Effect

Inactive Publication Date: 2007-05-23
PANASONIC CORP
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Problems solved by technology

[0011] Existing studies have shown that the correlation between the antennas of MIMO systems in actual environments will reduce the rank of MIMO channels, thereby reducing the effective multiplicity of transmit diversity, which will lead to the deterioration of transmit diversity performance

Method used

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  • Transmitting diversity method and MIMO communication channel
  • Transmitting diversity method and MIMO communication channel
  • Transmitting diversity method and MIMO communication channel

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Embodiment Construction

[0021] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0022] Fig. 2 is a schematic structural diagram of a MIMO system according to an embodiment of the present invention.

[0023] As shown in Figure 2, the sending end (sending device) and the receiving end (receiving device) use n T and n R The antenna transmits and receives signals. At the sending end, coding and modulation operations are performed on the bit stream to be sent in the coding and modulation unit 101 to form a symbol stream. Next, serial-to-parallel conversion is performed on the serial symbol stream in the serial-to-parallel conversion unit 102, and it is divided into M parallel symbol streams, that is, the output of the serial-to-parallel conversion unit 102 is a vector of M×1, represented by s in FIG. 2 , where s=[s 1 ,s 2 ,...,s M ] T .

[0024] After the serial-to-parallel transformation unit 102, the orthogonal t...

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Abstract

The invention relates to a sending grouping method in MIMO communication system, wherein said system comprises receiver and sender; the method comprises that: sender via orthogonal transformation complexes M original marks into N sending marks, while M and N are natural number; receiver based on second-stage statistic property of channel confirms N wave-beam forming parameters of N sending marks; receiver via feedback channel sends said parameters to the receiver; the sender uses relative wave beams relative to N parameters to send N sending marks. The invention sending method can eliminate the correlation between sending mark channels, and use orthogonal sending method to improve the sending grouping property of MIMO.

Description

technical field [0001] The present invention relates to a transmission diversity technology used in a multiple-input multiple-output (MIMO) system, in particular to a space-correlated MIMO communication system and a corresponding transmission diversity method, which can effectively improve transmission diversity performance. Background technique [0002] Increasingly high information transmission rate is one of the main problems faced by future wireless communication systems. In order to achieve this goal on limited spectrum resources, multiple-input multiple-output technology, that is, multi-antenna technology has become one of the indispensable means used in future wireless communications. In the MIMO system, the transmitting end uses multiple antennas to transmit signals, and the receiving end uses multiple antennas to receive spatial signals. Studies have shown that compared with traditional single-antenna transmission methods, MIMO technology can significantly increase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08H04J99/00
CPCH04B7/0408H04B7/0604
Inventor 佘小明李继峰
Owner PANASONIC CORP
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