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毕业论文-关于抗多径干扰的两种方法的分析，22页，9120字。附开题报告，中英文翻译、任务书等全套毕业设计
一、 论文（设计）主要内容及主要技术指标
1.主要内容
本文以最小化系统总均方误差(Sun MSE)为准则,迭代设计线性收发机的方案。该方案通过对接收机的改进设计,能够有效地避免传统MMSE设计过程中出现的拉格朗日乘子不易计算的缺点,大大降低设计复杂度。由于拉格朗日乘子有解析解,发射预编码矩阵也有闭式解,并且可以通过定点迭代算法有效解出。收端的接收机也不用基站下发,只要各自采用MMSE均衡即可。仿真结果证明该方法的有效性。
2.技术指标
（1）实现下行波束赋形，减少基站和移动台的发射功率，有效地改善系统性能，提高系统容量
（2）具有良好的抗干扰能力，适应在恶劣环境中工作
（3）算法具有收敛速度快、实时性好、对非平稳信号适应性强等优点

摘要
本文以最小化系统总均方误差(Sun MSE)为准则，迭代设计线性收发机的方案。该方案通过对接收机的改进设计，能够有效地避免传统MMSE设计过程中出现的拉格朗日乘子不易计算的缺点，大大降低设计复杂度。由于拉格朗日乘子有解析解，发射预编码矩阵也有闭式解，并且可以通过定点迭代算法有效解出。收端的接收机也不用基站下发，只要各自采用MMSE均衡即可。仿真结果证明该方法的有效性。基于数据块传输模型，将窄带MIMO并行干扰抵消接收机推广到宽带MIMO信道，在理想信道和信道估计下，通过仿真评估了所提出的宽带MIMO并行干扰抵消接收机的性能。仿真结果表明：所建议的方案在宽带MIMO信道下的性能好于窄带MIMO信道下的性能，在宽带MIMO信道下， 接收机可获得比窄带下更大的分集增益。
本设计借助数学建模的有关方法，结合移动通信的有关知识，提出一种改进的抗多径干扰的接收模型，该模型主要通过系统模型、信道模型、信道的相关函数计算、波达方向估计算法、空自适应估计算法和空间自适应滤波算法等。并通过相应参数设置各种算法，应用MTLBEL进行仿真验证。结果证明本问题所提出的方法可以有效提高接受装置的抗干扰性能。
关键词：多径干扰，MIMO，空时信号处理，预编码，收发机联合设计
On the two types of anti-multipath interference analysis method
Abstract：An iterative linear transceiver design scheme under Sum Mean Squared Error (SMSE) minimization criterion is proposed. By modifying the structure of transceiver,the complex computation of Lagrangian multiplier within traditional MMSE transceiver design can be effectively obviated,and thus the whole system complexity can be greatly reduced. Because the Lagrangian multiplier has analytical solution transmit precoding matrix also has closed-form solution and can be solved easily with fixed-point iterations. The recelive filter is worked out independently with MMSE criterion at each terminal, and the downlink singaling of each receiver filter form base station is not necessary. Simulations demonstrate that the proposed scheme is effective. Parallel interference cancellation receiver in flat fading MIMO channel was directly applied to frequency selection MIMO channel based on block transmission model. The performance of proposed wideband receiver is evaluated based on perfect channels and channel estimation cases by computer simulation. Simulation results states the performances of MIMO space time processing algorithms based on frequency selective channel have the advantage over the algorithms based on flat MIMO channels,and the receiver can obtain more diversity gain than it is in flat MIMO system.
With this design the method of mathematical modeling,combined with the knowledge of smart antenna An improved anti-multipath interference model for smart antenna receivers,The model is primarily through the system model,channel models, channel correlation function,the DOA estimation algorithm,adaptive estimation algorithm for space,such as adaptive filtering algorithm. Corresponding parameter setting through a variety of algorithms for simulation applications MTLBEL. Results show that this question can be raised by improving access to effective anti-interference performance devices.
Key words：Multi-diameter disturbance,MIMO,interference cancellation, Precoding ,Joint transceriver design
目 录
1 绪论 1
1.1 研究背景 1
1.2 参数说明 2
2 数学模型及算法分析 2
2.1无线信道的叙述 2
2.2 无线多径信道模型 3
2.3系统模型的建立 4
2.4 并行干扰抵消接收机 5
2.5 基于训练序列的信道估计 6
3 仿真及结果分析 8
4 迭代接收机的设计分析 9
4.1 迭代收发机的设计 10
4.2 单用户单信息流系统 13
4.3收敛性的分析 13
4.4 计算复杂度的分析 14
4.5 仿真结果及其分析 16
5 两种方法的结果分析 16
致谢 17
参考文献 18