Power distribution method, transmission and acceptance method and system for multi-input-output system

Abstract

The invention provides a power dividing method of a multi-input output system and a receiving and transmitting method and a system which apply the method. The power dividing method comprises the following steps: (a) a transmitter receives a precoding matrix and a singular value matrix feedbacked by a receiver of a prior subframe, wherein, each singular value represents the gain of a subchannel of an independent space; (b) the quality of the transmission performance of each subchannel is judged according to the singular value matrix; and (c) according to the quality of the transmission performance of the subchannel, the non-equal power dividing technology is adopted, and under the premise of guaranteeing the requirements of transmission performance of data stream 1, the surplus power is distributed to data stream 2, thus achieving the requirements of improving the system capacity. The method and the system achieve the requirements of improving the system capacity, do not cause loss of transmission subchannel and improve the data transmission rate.

Description

Technical field [0001] The present invention relates to a wireless communication system, and more specifically, to a power allocation method based on a precoding MIMO system and a transmitting and receiving method and system using the method. Background technique [0002] In wireless communication systems, the biggest feature of MIMO (Multiple Input Multiple Output) is that it greatly increases the capacity of the system. Based on information theory, it can be deduced that if the transmission power of each transmitting antenna is the same, the capacity of the MIMO communication system varies with min (M, N). ) Linear increase, where M and N are the number of transmitting and receiving antennas respectively. If the receiver of the MIMO system obtains the precoding matrix according to the estimated part or all of the channel information and feeds it back to the transmitter, and the transmitter uses the fed back precoding matrix to precode the transmitted signal, the system capacity...

AI Technical Summary

Problems solved by technology

Although this mechanism increases the system capacity, the allocated transmission power is very low when some sub-channels have a low SNR, which is equivalent to the loss of sub-channels, and the transmission rate does not increase.

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