Method for allocating minimum power of MIMO-OFDM multi-user system based on allelism

Abstract

The invention discloses a method for allocating optimal power of an MIMO-OFDM multi-user system based on power allelism of uplink power and a downlink power of a wireless channel, a user apparatus and a communication system, which are applied to the technical field of wireless transmission. A transmission terminal apparatus realizes multi-user dispatching of a downlink broadcast channel and minimizes power consumption of the transmission terminal under a restricted condition of satisfying velocity requirements of multiple users according to channel conditions of various users; the user apparatus and the transmission terminal apparatus can realize conversion of an allocation scheme of the optimal allocation of the downlink power and the allocation of the uplink by using the relation of the power allelism of the uplink and the downlink. The invention provides the power allocation method for minimizing the transmission power on the premise of satisfying the velocity requirements of various users, therefore, power overhead of the transmission terminal is reduced, and a purpose of reducing interference of inter-users and inter-cells is also achieved.

Description

technical field [0001] The present invention relates to a multi-user system power minimization distribution method, in particular to a method for MIMO-OFDM multi-user system to meet the condition required by each user's communication rate to minimize transmission power. Background technique [0002] Using multiple antennas on the transmitter and receiver constitutes a multiple-input multiple-output (MIMO) transmission model, which can enhance the reliability of wireless connections and increase the capacity of wireless communication systems. In a wireless environment with rich reflections, for a system with Nt transmitting antennas and Nr receiving antennas, the contribution of MIMO transmission to the improvement of channel capacity is linear with the relatively small number of transmitting antennas and receiving antennas . For broadband communication, Orthogonal Frequency Division Multiplexing (OFDM) technology divides the frequency selective channel into a group of paral...

AI Technical Summary

Problems solved by technology

That is to say, previous studies mainly focused on maximizing the overall rate. In this case, users with better channel conditions get a much higher service chance than users with poor channel conditions, and some users even get no service at all. service opportunity

Therefore, in the actual system, taking the maximum overall rate as the user scheduling criterion will cause extreme unfairness among users

Images