| 一种多用户 MIMO-OFDM 系统的 CQI 有限反馈和量化方案 |
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| 引用本文： | 曹 欢,张 静,董建萍.一种多用户 MIMO-OFDM 系统的 CQI 有限反馈和量化方案[J].上海师范大学学报(自然科学版),2012,41(3):258-262. |
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| 作者姓名： | 曹 欢 张 静 董建萍 |
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| 作者单位： | 上海师范大学信息与机电工程学院,上海,200234 |
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| 摘 要： | 利用多用户场景下多输入多输出正交频分复用（MIMO—OFDM）系统用户端的信道质量反馈信息和服务质量的相互关系，给出一种以系统吞吐量最大化为指标得到最优量化比特的方案，同时给出了用户误码率限制下的最优量化门限值．它通过推导反馈信道质量信息数与用户传输速率、中断概率之间的数学关系，在用户误码率要求下，设置最优量化门限使系统吞吐量最大化．仿真结果表明：该方案不仅能够满足系统的传输速率和平均误码率要求，还降低了反馈开销．
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| 关 键 词： | 多输入多输出 正交频分复用 有限反馈 量化门限 |
A CQI limited feedback and quantization scheme for multiuser MIMO-OFDM system |
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| CAO Huan
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ZHANG Jing
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DONG Jian-ping.A CQI limited feedback and quantization scheme for multiuser MIMO-OFDM system[J].Journal of Shanghai Normal University(Natural Sciences),2012,41(3):258-262. |
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| Authors: | CAO Huan ZHANG Jing DONG Jian-ping |
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| Institution: | (College of Information,Mechanical and Electrical Engineering,Shanghai Normal University,Shanghai 200234,China) |
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| Abstract: | By utilizing the interrelation between channel feedback information of subscriber and quality of service in the scenario of multi-user multiple input multiple output orthogonal frequency division multiplexing(MIMO-OFDM),a scheme that calculates the optimal quantization thresholds is proposed in order to achieve high total transmission rate which is subject to constraints of users′ bit error rate.It discusses the mathematic relationship among feedback channel information,user transmission rate and outage probability by setting optimal quantization thresholds to maximize system throughput.Simulation results show that the scheme can not only satisfy system transmission rate and average bit error rate requirement,but also reduce the system feedback cost. |
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| Keywords: | MIMO OFDM limited feedback quantization thresholds |
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