qpskAWGNaRayleigh

Multiple input multiple output techniques combined with orthogonal frequency division multiplexing (MIMO-OFDM) provide a promising approach for wireless systems. However, a serious drawback of the OFDM system is the high peak-toaverage power ratio (PAPR), which may severely affect the power efficiency of RF power amplifiers. In this paper, we propose a simple method to reduce the PAPR of MIMO-OFDM signals based on the use of unused subcarriers. Instead of processing the signals at each transmitter separately, a peak cancelling signal is generated at one antenna and is then applied to all the others with only simple modifications. Simulation has shown that a minimum 2 dB reduction in PAPR can be achieved for all transmit signals using this approach. As the signal processing is nearly all done at a single transmitter, repetition of the operations at each transmitter is avoided, and therefore the overall cost of the system can be significantly reduced.

D2D的自适应链路仿真，可根据信道状态，自选自调制方式(D2D adaptive link simulation, according to the channel state, optional self modulation)

本科毕业设计的资料，关于光反馈自混合干涉信号OFSMI的仿真相关程序(The graduate design program simulation of optical feedback self-mixing interference signal OFSMI)

此程序实现了AWGN信道下的模拟调制解调，用的是matlab平台(This program implements the analog modulation and demodulation under the AWGN channel, using the MATLAB platform.)

自适应滤波器相关知识，原理，代码。RLS和小波在声信号消噪处理中的应用，RLS自适应噪声消除器设计研究，自适应滤波器的算法比较研究等等(Adaptive Digital Filter)

极化码的matlab实现，包括了完整的编码以及译码程序(polar coding and decoding)

说明：  bpsk和4pam调制系统误码率和误符号率仿真，以及与理论值比较。(Simulation of BER and BER in 4pam modulation system)

网络传输控制信号，网络芯片是W5100,传输信号可为控制信号与开关信号，modbus通信协议。(PLC TO W5100,the led and i/o can traver bay w5100,use msp430f5438 as cpu,modbus an 485 to the sevlers,pc use to controle.)

说明：  QPSK的MATLAB实现包括发送数据、QPSK比特映射、成型滤波、载波调制、载波解调、收成型匹配、IQ抽样判决、接收比特数据恢复8个模块(The MATLAB implementation of QPSK includes eight modules: sending data, QPSK bit mapping, shaping filtering, carrier modulation, carrier demodulation, shaping matching, IQ sampling decision and receiving bit data recovery.)

文件中包括括了Multipath fading Channel和RAleigh Fading Channel 的MATLAB实现方式，程序可以直接运行(Documents, including including a Multipath fading Channel and RAleigh Fading Channel implementations of MATLAB, the program can be directly run)