摘要多用户对双向中继网络（Two-way relay networks, TWRN）技术与以往的单向中继和单用户对TWRN比较，具有诸多优点，不仅可以提高基站覆盖范围, 减少通信的盲区，具有较好的空间分集增益等，还可以为用户之间提供高速通信，来实现更高的频谱利用效率。本文主要研究了在中继站能获取完美信道状态信息的条件下多用户对TWRN的波束成形和功率分配策略，主要研究工作如下：30379
(1).针对多用户对TWRN波束成形技术展开探讨，重点调研了基于放大转发四种代表性波束成形技术：迫零加迫零（Zero-forcing plus zero-forcing, ZF plus ZF），奇异值分解加奇异值分解（Singular value decomposition plus singular value decomposition, SVD plus SVD），块对角化加块对角化（Block diagonalization plus block diagonalization, BD plus BD）以及最大化信干噪比加最大化信泄噪比（Maximum signal-to-interference-and-noise ratio plus maximum signal-to-leakage-and-noise ratio, Max-SINR plus Max-SLNR）。仿真结果表明：在和速率方面，由优到劣排序如下: SVD plus SVD, Max-SINR plus Max-SLNR, BD plus BD,  ZF plus ZF。
(2).为了继续改善多用户对TWRN的性能，本文专门为SVD plus SVD算法设计了注水功率分配（Water filling power allocation，WFPA）算法。仿真结果显示：在低信噪比情况下，WFPA同等功率分配相比可以适当提高和速率性能，可以明显提高误符号性能。
关键词
毕业论文设计说明书外文摘要
Title    Beamforming   and   Power   Allocation   for   Multi-pair  Two-way  Relay  Networks             
Abstract
Compared to one-way relay networks and single-pair two-way relay, multi-pair two-way relay networks (TWRN) have many advantages. TWRN can not only provide spatial persity, increase the coverage of base station and reduce blind coverage, but also can complete information exchanging of multiple users during two time slots by spatial pision multiple access. In this paper, we mainly focus on beamforming and power allocation with perfect channel state information. This paper mainly includes two aspects as follows:
(1). We study and compare four beamforming algorithms on the multi-pair two-way relay networks：zero-forcing plus zero-forcing (ZF plus ZF), block diagonalization plus block diagonalization (BD plus BD), maximum signal-to-leakage-and-noise ratio (Max-SLNR) plus maximum signal-to- interference-and-noise ratio (Max-SINR) (Max-SINR plus Max-SLNR) and singular value decomposition plus singular value decomposition (SVD plus SVD). Simulation results show that four beamforming algorithms have sum-rate decreasing order: SVD plus SVD, Max-SINR plus Max-SLNR, BD plus BD, and ZF plus ZF.
(2). In order to enhance the sum-rate of multi-pair two-way relay networks, water filling power allocation (WFPA) is specifically designed for SVD plus SVD beamformer. Simulation results show that: in the low SNR region, WFPA can improve the sum-rate performance, but the improvement is not so obvious; WFPA can enhance the SER performance.
Keywords  TWRN，beamforming, ZF, BD, SVD, Max-SINR, Max-SLNR, WFPA
目   次
1  绪论    1
1.1  研究背景和意义    1
1.2  无线中继的发展与现状    3
1.3  论文结构    4
2  中继协作通信系统基本原理    6
2.1  中继系统模型    6
2.2  中继系统的分类    8
2.3  基于AF的TWRN模型    10
2.4  本章小结    12
3  窄带多用户对TWRN波束成形算法    13
3.1  引言    13
3.2  系统模型    13 多用户对双向中继波束成形与功率分配算法研究:http://www.youerw.com/tongxin/lunwen_26051.html