Method and system for optimizing multi-input/output transmitting scheme

An optimization method and multi-input technology, applied in diversity/multi-antenna systems, space transmit diversity, etc., can solve the problems of demodulation performance degradation, high receiver complexity, and low channel capacity, and achieve the effect of demodulation performance improvement

Inactive Publication Date: 2006-11-15
HUAWEI TECH CO LTD
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Problems solved by technology

[0014] It can be seen from the above that the open-loop spatial multiplexing scheme can increase the transmission rate, but its channel capacity is lower than that of the closed-loop spatial multiplexing, and there is mutual interference between data streams. In order to ensure the same demodulation performance, its receiving However, the closed-loop spatial multiplexing scheme can obtain high transmission rate and demodulation performance, but when the moving speed of the receiving end is high, the speed of channel change is also very fast
Since there is a certain delay in the feedback information from the transmitter to the receiver, when the transmitter uses the received feedback information to transmit, the channel has changed at this time, and the feedback information is not correct for the current channel, which will cause Degradation of demodulation performance

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Embodiment Construction

[0046]The core idea of ​​the present invention is to provide a method and system for optimizing a multiple-input-output transmission scheme. The mobile speed estimation unit is used to estimate the mobile user's mobile speed, and an appropriate MIMO transmission scheme is determined according to the mobile speed. On the basis of tuning performance, the transmission efficiency is improved.

[0047] The present invention provides a multiple-input-output transmission scheme optimization system, the system includes a moving speed estimation unit, a transmitter and a mobile terminal (not shown in the figure); the transmitter includes: a MIMO scheme selection unit, a MIMO signal processing unit, An intermediate radio frequency processing unit; the moving speed estimating unit can be set at the transmitting end of the system, or can be set at the mobile terminal. If set at the transmitter such as Figure 4 As shown, the moving speed estimation unit is connected with the middle radio...

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Abstract

The invention relates to the multi inputs multi output transmitting project optimizing method and the system in the wireless technology domain, the moving speed estimating cell is used to estimate the moving speed of the user, the proper MIMO beaming project is determined according to the said moving speed. The improvement of the transmitting efficiency on the base of assuring the demodulating capability of the receiving end would be reached. The invention improves the transmitting speed on the base of assuring the demodulating capability of the receiving terminal.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and system for optimizing a multiple-input-output transmission scheme. Background technique [0002] Since the pioneering work of Telatar and Foschini in the late 1990s showed that MIMO (Multiple-Input Multiple-Output) transmission technology can significantly improve the spectral efficiency of wireless communication, the research on MIMO wireless communication technology has attracted a large number of scholars. MIMO wireless communication technology transmits signals from multiple antennas at the same time by using a certain coding technology at the sending end, receives signals through multiple antennas at the receiving end and combines signals with a certain combining technology, so as to reduce the bit error rate or increase the signal transmission rate. the goal of. [0003] The essence of MIMO technology is to use the inherent multipath propagation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
Inventor 陈莉娜
Owner HUAWEI TECH CO LTD
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