_matlab_串口收发的GUI界面

simulating PAPR reduction with PTS method in STBC MIMO OFDM

说明：  bpsk调制仿真，可直接用 1、数字调制方法 数字调制就是把数字基带信号的频谱搬移到高频处，形成适合在信道中传输的带通信号。基本的数字调制方式有振幅键控（ASK）、频移键控（FSK）、绝对相移键控（PSK）、相对（差分）相移键控（DPSK）。在接收端可以采用想干解调或非相干解调还原数字基带信号。 数字信号的传输方式分为基带传输和带通传输。然而，实际中的大多数信道（如）无线信道具有丰富的低频分量。为了使数字信号在带通信道中传输，必须用数字基带信号对载波进行调制，以使信号与信道的特性相匹配。(1, digital modulation method Digital modulation is the transfer of the spectrum of a digital baseband signal to a high frequency to form a bandpass signal suitable for transmission in the channel. The basic digital modulation methods are amplitude keying (ASK), frequency shift keying (FSK), absolute phase shift keying (PSK), and relative (differential) phase shift keying (DPSK). At the receiving end, the digital baseband signal can be restored by using dry demodulation or non-coherent demodulation. Digital signal transmission methods are divided into baseband transmission and bandpass transmission. However, most channels in practice, such as wireless channels, have rich low frequency components. In order for a digital signal to be transmitted in a band channel, the carrier must be modulated with a digital baseband signal to match the signal to the characteristics of the channel.)

MFC写的2个程序，通过socket通信，上下位机的。上位机发送一个名字给下位机，下位机通过查询数据库取得电话号码传回上位机,带详细文档。(MFC write two procedures, through the socket communication, next-bit machine. PC to send a name to the next crew, the next crew by querying the database to obtain the phone numbers return PC)

说明：  生成m序列和gold序列的matlab代码，并比较他们的自相关、互相关特性。(Generate matlab code of m-sequence, and control the generation of m-sequence with specified requirements through input tap)

16QAM信号 64QAM信号的产生和分析，星座图，频谱，功率谱(6QAM signal 64QAM signal generation and analysis, constellation, spectrum, power spectrum)

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.

说明：  包含有数字通信课程实验大作业报告与代码。完成的OFDM的收发包含：1.卷积编码、2.自动增益控制、3.极大似然判决、4.QPSK收发、5.帧检测等，代码在MATLAB2016b环境下编译通过(It contains the report and code of the experiment assignment for the course of digital communication. The completed OFDM transceiver includes: 1. convolutional coding, 2. automatic gain control, 3. maximum likelihood decision, 4. QPSK transceiver, 5. frame detection, etc. The code is compiled and passed in MATLAB2016b environment.)

可以运行的m4k20功率分配图，mimo功率优化,OFDM典型仿真程序，贪婪算法仿真程序，以及16QAM仿真程序，经过修改的可以使用(M4k20 can run the power distribution map, mimo power optimization, OFDM typical simulation program, greedy algorithm simulation program, as well as 16QAM simulation procedures can be modified to use)

包含有数字通信课程实验大作业报告与代码。完成的OFDM的收发包含：1.卷积编码、2.自动增益控制、3.极大似然判决、4.QPSK收发、5.帧检测等，代码在MATLAB2016b环境下编译通过(It contains the report and code of the experiment assignment for the course of digital communication. The completed OFDM transceiver includes: 1. convolutional coding, 2. automatic gain control, 3. maximum likelihood decision, 4. QPSK transceiver, 5. frame detection, etc. The code is compiled and passed in MATLAB2016b environment.)

这是一个用CVI编写的模拟标准频谱仪界面，包含了前面板和各种常用的输入按键。(This program is developed by CVI used to simulate a standard interface of spectrum analyzer ,presented with popular keys and functions.)