mimo-with-sumrate-analysis

说明：  可实现绘制星型16QAM星座图，用于调制识别分类(Able to draw star 16QAM constellation diagram)

在信号发送后，接收方需要实现位同步才能正确解码(after signal is sent, receiver need bit syn to decode correctly)

说明：  2. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 (On the wireless channel of the Doppler spectrum, please answer the following questions: (1) In some radio channels, the Doppler frequency shift will cause the output signal of the wireless channel aliasing. Please describe the aliasing produced a variety of reasons (2) wireless channel in the Doppler spectrum has a classical spectrum (classic spectrum), please explain the mechanism of produce such spectral shape (3), please use the Simulink tool to write code ( S-Function mode), resulting in a single-path Rayleigh channel, the Doppler spectrum for the classical spectrum, including mobile rate of 120km/h. And requested the answer: that they used computer-generated classical spectrum is the right possible way.)

BPSK信号的仿真，包括随机信号产生、数字基带信号、已调信号、加噪声，解调等(BPSK signal simulation, including the random signal generator, a digital baseband signal, the modulated signal, plus noise, the demodulation)

介绍了16PSK与16QAM调制的概念，分析了调制的频带利用率和误码性能仿真，总结了16QAM调制和16PSK调制的优缺点。(Introduction of 16QAM modulation 16PSK with the concept of analysis of modulation bandwidth efficiency and BER simulation, summed up the 16PSK modulation 16QAM modulation and the advantages and disadvantages.)

说明：  2. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请描述：自己用计算机产生的经典谱是正确的依据。(2. Regarding the doppler spectrum of the wireless channel, please answer the following questions: (1) in some wireless channels, doppler frequency shift will cause aliasing of the output signals of the wireless channel.Describe the various causes of aliasing; (2) there is a classic spectrum in the doppler spectrum in the wireless channel, please explain the mechanism of producing this spectrum shape; (3) please use Simulink tool to write code (s-function mode) to generate a single-path Rayleigh channel, whose doppler spectrum is the classical spectrum, in which the moving rate is 120km/h.And please describe: your own computer generated classical spectrum is the correct basis.)

这是一个扩频通信系统的通信系统建模的MATLAB仿真程序,里面有详细的通信系统建模的步骤,希望对大家有所帮助 (This is a spread spectrum communication system of communication system modeling of MATLAB simulation program, there is a detailed communication system modeling steps, hope to be helpful to you )

本源码包参考英国Southampton大学Robert G. Maunder教授2008年的EXIT charts开源demo，给出了通用(分量码多项式可自定义)并行级联Turbo码的EXIT charts的作图源码。同时可完成迭代轨线、BER等值线的绘制等工作。 由于对于码块长较大的情形仿真需要较长时间，源码包也给出了部分分量码多项式的仿真结果，可直接用于绘图。 源码包还给出了最经典的S.Ten Brink介绍EXIT charts基本原理的参考文献，以及本人对通信系统中迭代译码过程分析技术综述的小论文，希望对大家有所帮助。(This source package comes after Professor Robert G. Maunder s open source demo about EXIT charts in 2008 from University Southampton, UK. It is designed for universal (constituent code generation polynomial can be customized) Parallel Concatenated Turbo Code EXIT charts. The iterative trajectories and BER contour drawing is also completed in this package. Since the long block case costs a lot of simulation time, some simulation results are included in the package. We also give the most classical introduction to the basic principles of EXIT charts from S. Ten Brink, as well as a document about analysis technologies for iterative decoding process in communication systems. Hope this will help.)

MIMO-OFDM信道估计中对不同信道的对比(MIMO-OFDM channel estimation for different channel contrast)

一个完整的ofdm调制系统的仿真程序，包含PN码自动生成，串并转换等各功能模块和算法，重点针对不同信道条件对常用及各种信道盲均衡算法进行仿真分析比较，对不同原型滤波器算法进行研究分析，分析比较QAM系统，供博士毕业论文参考(Ofdm modulation of a complete system simulation program, including automatically generated PN code, and convert the string Other functional modules and algorithms, focusing on a different channel conditions and a variety of common blind channels are Balance simulation algorithm analysis and comparison of different research and analysis prototype filter algorithm, sub- Analysis of more QAM systems, Ph.D. thesis for reference)