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

A MIMO-OFDM, multi-user system technology, applied in the field of multi-user system power minimization allocation, can solve the problems of unfairness among users, lack of service opportunities for users, etc.

Inactive Publication Date: 2010-05-05
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Abstract
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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,

Method used

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

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Embodiment Construction

[0033] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

[0034] (1) Construction of MIMO-OFDM multi-user system with user selection

[0035] A MIMO-OFDM system with user selection is constructed as figure 1 As shown, the present invention adopts the MIMO-OFDM system with user selection of 4 transmissions and 2 receptions, and adopts the QPSK modulation mode. The channel state information is acquired at the receiving end, and the present invention does not relate to a specific acquisition method. It is also assumed that each user feeds back its own channel state information to the transmitter, and the transmitter completes user selection and power allocation according to the fed back channel state information. In order to fully test the influence of the present invention on system performance, a multipath Rayleigh channel model is used to per...

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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...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L1/06H04L1/00H04B7/04
CPCY02D30/70
Inventor 杭娟佘锋
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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