Multi-antenna selectivity transmit-diversity method of wireless OFDM/TDD system

A technology of transmit diversity and selectivity, applied in diversity/multi-antenna systems, space transmit diversity, wireless communication, etc., can solve problems such as unsatisfactory diversity effects, achieve the effect of increasing signal receiving strength and improving communication quality

Inactive Publication Date: 2010-05-19
无锡德通数据无线通信科技有限公司
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The general transmit diversity adopts multi-antenna (equal gain) space diversity, so that the receiving end can obtain a certain combination gain, which is relatively simple to implement, but sometimes the diversity effect is not ideal

Method used

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  • Multi-antenna selectivity transmit-diversity method of wireless OFDM/TDD system
  • Multi-antenna selectivity transmit-diversity method of wireless OFDM/TDD system
  • Multi-antenna selectivity transmit-diversity method of wireless OFDM/TDD system

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Comparison scheme
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Embodiment Construction

[0021] The multi-antenna selective transmission diversity method of wireless OFDM / TDD system comprises the following steps:

[0022] a. Receive strength detection

[0023] The base station receiving unit measures the receiving strength of the received signals on different antennas;

[0024] b. Antenna serial number feedback

[0025] The base station receiving unit sorts the received signal strength of each antenna, and feeds back the sorting results to the base station control unit;

[0026] c. Selective delivery

[0027] The base station control unit selects the transmitting antenna for signal transmission according to the sorting result.

[0028] The step a specifically includes the following steps: a1. When the base station performs resource allocation, ensure that the uplink and downlink frequency resources occupied by each terminal correspond one-to-one, and are in the same coherent bandwidth; a2. When the physical layer receives the uplink signal, the All sub-channel...

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Abstract

The invention provides a multi-antenna selectivity transmit-diversity method of a wireless OFDM/TDD system, comprising the following steps: receiving intensity detection: a base station receiving unit carries out receiving intensity measurement to the received signals of the different antennas; antenna serial number feedback; the base station receiving unit carries out ordering to the receiving signal intensity of each antenna and feeds the ordering result back to a base station control unit; selectivity transmission: the base station control unit selects a transmission antenna to carry out signal transmission according to the ordering result. In the invention, the physical layer of the base station carries out detection ordering to an ascending receiving signal of each antenna, so as to dynamically select the transmitter antenna, increase the signal receiving intensity of a terminal side, achieve the selective transmit-diversity purpose and improve the communication quality.

Description

technical field [0001] The invention relates to a multi-antenna transmission technology in wireless communication, in particular to a multi-antenna transmission diversity method for an OFDM (orthogonal frequency division multiplexing) system base station in a TDD (time division duplex) mode. Background technique [0002] The main factor affecting the signal quality in the wireless OFDM / TDD system is channel fading, and the multi-antenna technology in wireless communication can effectively combat the problem of wireless channel fading. The simplest of these is transmit and receive diversity. The general transmit diversity adopts multi-antenna (equal gain) space diversity, so that the receiving end can obtain a certain combination gain, which is relatively simple to realize, but the diversity effect is sometimes not ideal. Contents of the invention [0003] In view of the above problems, the present invention provides a multi-antenna selective transmission diversity method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04W24/08H04W72/08H04L27/26
Inventor 余晓明钟勤刘涛
Owner 无锡德通数据无线通信科技有限公司
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