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A downstream transmitting antenna selecting method adaptive for distributed system

A distributed system and transmit antenna technology, applied in diversity/multi-antenna systems, space transmit diversity, etc., can solve the problems of poor performance of zero-forcing detection methods

Inactive Publication Date: 2005-04-06
TSINGHUA UNIV
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Problems solved by technology

[0004] In the published literature, there is a method for antenna selection and power rate allocation based on large-scale channel information, which is suitable for the zero-forcing (ZF) detection method at the receiving end, and the performance of the zero-forcing detection method is very poor
As for the detection method of serial interference cancellation with strong performance, there is no related work

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  • A downstream transmitting antenna selecting method adaptive for distributed system
  • A downstream transmitting antenna selecting method adaptive for distributed system
  • A downstream transmitting antenna selecting method adaptive for distributed system

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Embodiment Construction

[0044] The method for selecting downlink transmitting antennas suitable for a distributed system proposed by the present invention is further described in conjunction with the embodiments as follows:

[0045] The embodiment of the method of the present invention is used in a spatial multiplexing hierarchical transmission technology (V-BLAST) system using zero-forcing and serial interference cancellation (ZF-SIC) receivers, considering a single-user (n, m) distributed antenna In the system, there are n base station antennas and m user antennas. The receiving end obtains accurate and timely channel information through channel estimation, and the transmitting end selects antennas from n base station antennas according to the large-scale channel information fed back from the receiving end, and allocates appropriate power and rate on the selected antenna set. The receiving end adopts the ZF-SIC method with a fixed detection sequence, and the detection sequence is obtained from the ante...

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Abstract

This invention relates to a distribution system down send antenna selection method, which comprises the following steps: to use space multiplexing send project BLAST with each send antenna send out independent sub-data flow and its receive end adopting serial interference-out method to measure gradually; the send end selects the antenna according to average error symbol rate or error code rate expression of each layer in n pieces of base antenna with large-scale channel information reflected from receive end; the send end is to optimize the send power, speed and antenna integration of each antenna to ensure the same error symbol rate and error code rate of each layer.

Description

Technical field [0001] The present invention belongs to the technical field of downlink transmission of wireless communication, and particularly relates to a method for selecting a downlink transmission antenna suitable for a distributed wireless communication system. Background technique [0002] The State Key Laboratory of Microwave and Digital Communication at Tsinghua University first proposed the concept of a distributed wireless communication system, namely: the use of distributed antennas, distributed optical fibers, distributed computing and distributed networks to achieve a new generation of wireless communication. Distributed wireless communication systems use distributed antennas and distributed processing structures. Therefore, the traditional cell division mechanism based on geographic location no longer exists, and is replaced by virtual cells with users as the unit. Specifically, the channel gain from each distributed antenna to each user is measured in real time, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08
Inventor 周世东王京韩双锋
Owner TSINGHUA UNIV