Method and device for multi-user transmission diversity

A transmit diversity and multi-user technology, applied in the field of communication, can solve problems such as system performance degradation, improper transmission delay configuration, and multi-antenna transmission delay cannot be adjusted in real time, so as to improve performance, avoid multipath signal superposition and fading depth and the effect of increasing the fading rate

Active Publication Date: 2008-05-07
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0004] The present invention provides a method and device for multi-user transmit diversity, which is used to solve the problem that the transmission delay of multiple antennas in the existing transmit diversity technology cannot be adjusted in real time according to the actual channel conditions, and further solve the problem caused by improper transmission delay configuration. System performance issues

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  • Method and device for multi-user transmission diversity
  • Method and device for multi-user transmission diversity

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Embodiment Construction

[0038] In this embodiment, channel estimation is used to directly perform multipath extension delay statistics. First, the effective window length of the channel impulse response of each user on each antenna is counted, and the transmission delay of each antenna is further determined according to the statistical results. According to the transmission The time delay and the transmit power of the user on each antenna send the signal out on each antenna.

[0039] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0040] Such as figure 2 As shown, the main process of multi-user transmit diversity in this embodiment is as follows:

[0041] Step 200, count the channel impulse response effective window lengths of all user channel estimates on each antenna.

[0042] Step 201. Determine the transmission delay of each antenna according to the effective window length of the channel impulse response.

[00...

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Abstract

The present invention discloses a multi-user transmit diversity method and a device; the present invention is used for solving the multi-antenna transmission time delay which can not be regulated in time according to the actual channel situation and further solving the problems that the channel estimation surpasses the effective range and multi-address interference caused by improper transmission time delay collocation; the method comprises that the channel impulse response effective window lengths of all users on every antenna are gathered; the transmission time delay of every antenna is confirmed based on the channel impulse response effective window length; and every antenna transmits the signal at the time corresponding to the transmission time delay of every antenna. The present invention realizes the dynamic collocation of multi-antenna transmission delay according to the actuation situation of the channel and avoids the problem of channel estimation surpassing the effective range and adding multi-address interference; moreover, the system function is promoted.

Description

technical field [0001] The invention relates to diversity technology in the field of communication, in particular to a method and device for multi-user transmit diversity. Background technique [0002] Diversity technology is a commonly used anti-fading technology, which has been widely used in the field of mobile communication. Among them, receive diversity technology has been very mature, and transmit diversity technology has become a research hotspot in recent years. Delayed transmit diversity is a method of transmit diversity. Frequency-selective channels are artificially created through delayed transmission of transmit antennas, and diversity gain can be obtained by using an appropriate multipath combining algorithm at the receiving end. Such as figure 1 In the schematic diagram of delayed transmit diversity shown, after the delay of each antenna is determined, the delayed component of the original transmitted signal is formed on each antenna through the delayer and s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04Q7/38
Inventor 孙长果蔡月民
Owner DATANG MOBILE COMM EQUIP CO LTD
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