空时频MIMO信道建模与实现
doi: 10.3724/SP.J.1146.2007.00209
Modeling and Implementation of Space-Time-Frequency MIMO Channel
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摘要: 该文根据角度功率谱、多普勒谱、功率时延谱及收发两端天线的结构，建立了一种多抽头的宽带MIMO信道模型。在建模过程中提出了一种改进的成形滤波器法，通过加入随机相移来消除各条路径的相关性，从而能够更好地仿真出独立的衰落信道。利用Matlab软件，创建了一个无线MIMO信道仿真平台，并针对3GPP标准MIMO信道模型进行了仿真。仿真结果表明用该文方法产生的信道特性与理论结果十分接近，从而验证了改进信道模型能够较好地模拟MIMO系统的空间信道。Abstract: A multi-tap broadband channel model is established according to Power-Azimuth-Spectrum(PAS), Doppler-Power-Spectral-Density(DPSD), Power-Delay-Profile(PDP) and the antenna structures of both transmitter and receiver. An improved shaping-filter method, which can eliminate correlation of different taps by adding a random phase-shift, is proposed to simulate the independent fading channel. A simulation platform of the wireless MIMO channel is proposed using Matlab, then simulate the MIMO channel model based on 3GPP standard. The simulation results show that the obtained channel characteristics are close to the theory results, which proofs the effectiveness of the improved channel model proposed in the paper.
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[1] Weichselberger W, Herdin M, Ozcelik H, and Bonek E. Astochastic MIMO channel model with joint correlation ofboth link ends[J].IEEE Trans. on Wireless Communications.2006, 5(1):1-2 [2] Yu Kai. Modeling of multiple-input multiple-output radiopropagation channels. [Ph. D. dissertation]. KTH university,2002: 11-28. [3] Kermoal J P and Schumacher L. A stochastic MIMO radiochannel model with experimental validation. IEEE J SelectAreas Communication, 2002, 20(6): 1-2. [4] 3GPP. MIMO discussion summary. 3GPP TSG R1-02-0181,January 2002. [5] Schumacher L, Pedersen K I, and Mogensen P E. Fromantenna spacings to theoretical capacities-guidelines forsimulation MIMO system. Proc. IEEE PIMRC2002, Lisbon,Portugal, Sept. 2002: 587-592. [6] 杨大成. 移动传播环境. 北京：机械工业出版社, 2003 年8 月第1 版: 228-230. -
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