Resource allocation method for multi-user mimo-ofdm system with quality of service guarantee

Abstract

The invention discloses a resource allocation method of a quality of service guaranteed MIMO-OFDM system, comprising: after the base station of the multi-user MIMO-OFDM system performs singular value decomposition on the channel matrix fed back by users, obtains parallel features on each subband Sub-channels; when the total transmission power of the base station is evenly distributed on all sub-bands and characteristic sub-channels, the base station scheduler allocates multiple sub-bands to users according to the rate of user-supported sub-bands and user priority; The power allocated to each user is redistributed on all the characteristic subchannels corresponding to the allocated subband, and the allocated power and bits are loaded according to the single-user greedy algorithm until the allocated power is loaded. When the rate obtained by the user exceeds its demand, find and deduct the user's surplus subband and the power corresponding to the surplus subband; redistribute the deducted subband and the corresponding power to other unsatisfied users.

Description

technical field [0001] The invention relates to a MIMO-OFDM system scheduling method, in particular to a resource allocation method of a quality-of-service guaranteed multi-user multiple-input multiple-output-orthogonal frequency division multiplexing MIMO-OFDM system. Background technique [0002] With the maturity of the 3G standard, people gradually focus on the research on the future wireless communication system. The future mobile communication system is a human-centered system to meet the individual needs of people, aiming at different business needs and environments, so that anyone can truly communicate freely in any business at any time and any place . [0003] With the continuous improvement of system transmission rate, there are two most serious challenges: multipath fading channel and bandwidth efficiency. Orthogonal Frequency Division Multiplexing (OFDM) technology reduces the impact of multipath fading by converting frequency-selective channels into flat chann...

AI Technical Summary

Problems solved by technology

Most resource allocation strategies only use the largest one or two characteristic sub-channels to send signals, which cannot make full use of spatial channel resources

Therefore, some schemes propose to use all sub-channels to transmit data, but the power is evenly allocated. Since the signal-to-noise ratio of each sub-channel is quite different, the system performance of the average power allocation needs to be improved.

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