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单权值优化发射波束MIMO传输方案
陈闽鄂,周渊平,苗荣臻,周鑫
0
(四川大学 电子信息学院,成都 610064)
摘要:
针对无线通信系统越来越高的传输速率需求,提出了一种新的多天线传输方案。该方案将非正交多址接入与波束形成相结合。在发射端,多路信号进行加权叠加,然后对该叠加信号加权形成波束。在接收端,将信号的能量、误码率等信息反馈到发射端用于权值优化。发射端收到反馈信息后,根据误码率对叠加权值进行调整,然后用单权值优化方法对波束权值进行调整,两部分联合优化提高系统的综合性能。实验仿真结果表明,与以往提出的多天线传输方案相比,该方案的传输速率和权值收敛速度都有所提高。
关键词:  多输入多输出  非正交多址接入  波束形成  权值优化
DOI:
基金项目:国家自然科学基金重点项目(61831004)
A Transmit Beam MIMO Scheme by Single-weight Optimization
CHEN Mine,ZHOU Yuanping,MIAO Rongzhen,ZHOU Xin
(College of Electronics and Information Engineering,Sichuan University,Chengdu 610064,China)
Abstract:
With the increasingly demand of data transmission rate for wireless communication systems,a novel multi-antenna transmission scheme is proposed,which combines non-orthogonal multiple access(NOMA) with beamforming.At the transmitter,multiple signals are superimposed by weighting.Then,the signal is weighted to form a beam.At the receiver,the energy,bit error rate(BER) and other information of the received signal are fed back to the transmitter to optimize the weights.After the transmitter gets the feedback information,the superposition weights and the beam weights are optimized by BER and the signal energy respectively.And a single-weight optimization method is used during the process.The joint optimization can effectively improve the system comprehensive performance.Simulation results show that the transmission rate and the weight convergence rate are improved compared with the previous multi-antenna transmission schemes.
Key words:  MIMO  non-orthogonal multiple access(NOMA)  beamforming  weight optimization
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