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

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...

AI Technical Summary

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

Images