MIMO时分蜂窝系统混合协作上行性能研究

寇明延; 张登福; 徐志刚; 徐惠民

doi:10.3724/SP.J.1146.2009.01053

MIMO时分蜂窝系统混合协作上行性能研究

doi: 10.3724/SP.J.1146.2009.01053

寇明延^{①;张登福,},
张登福,
徐志刚,
徐惠民

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出版历程
- 收稿日期: 2009-07-29
- 修回日期: 2009-11-25
- 刊出日期: 2010-07-19

Uplink Performance of MIMO TDMA Cellular System with Hybrid Collaboration

摘要

摘要: 下一代无线通信系统中，基站联合解码和移动终端协作传输是两种提高系统性能的重要技术。该文在线性时分蜂窝系统中，通过研究MIMO信道条件下混合协作可获得的单个小区上行可达传输速率，得出两种协作方式的相互作用和系统传输最小Eb/N0，并给出了小区联合解码与终端DF(解码前向)协作混合模式下的可达速率计算方法和最小Eb/N0的闭式解。最后，文中给出了MIMO衰减信道条件下的仿真结果，得出了多小区联合解码(宏分集)与终端协作性能的线性叠加关系，强临近小区干扰将会严重削弱用户与小区联合协作时终端协作作用的结论，验证了混合协作模式会极大提高系统传输性能。
- 蜂窝网协作通信; MIMO; 多小区联合解码; 混合协作; 宏分集
Abstract: Cooperation between Base Stations (BSs) and collaborative transmission between Mobile Terminals (MTs) are two promising techniques for the next generation wireless communications. This paper studies the per-cell achievable uplink sum-rate and minimum Eb/N0 of hybrid cooperative method and the interplay between the two collaborations in MIMO channels under an linear cellular model. A computational method and closed-form expression of minimum Eb/N0 for the achievable rate of DF combine with multi-cell processing in MIMO channels is derived. Moreover, the simulation results in MIMO fading channels are presented, and the results show that the macro-diversity gain from multi-cell decoding is independent with MTs collaboration but can be linear superposition, and hybrid collaboration significantly improve the system performance. However, high interference from adjacent cells weakens effect of MTs cooperation in hybrid collaboration system.

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