QPSK定时同步代码，采用Gardner定时同步算法 qpsk_demod

AWGN信道的代码，实现简单易懂，用C写的(AWGN channel code is simple to understand, written in C)

这是DTMB标准的发送对的MATLAB建模，包括多种信道模型和多种调制方式，可以进行灵活切换。(This is the DTMB standard to send the MATLAB modeling, including a variety of channel models and a variety of modulation, can be a flexible switch.)

Final Project Proposal: Design Smart Parking System Based on WSN Using Delay Efficient Distributed Data Aggregation Algorithm

MIMO多天线收发 各种性能比较（BER曲线） 包括MMRC EGC SC Alamouti V-BLAST。信道为瑞利信道，有2种，相关和非相关。测试仿真结果 请运行文件名带plot的。(MIMO multi-antenna transceiver various performance comparison (BER curve), including MMRC EGC Ala SC mouti V-BLAST. Rayleigh channel to channel, two species, and correlated. Simulation results of tests requested documents were operating with the plot.)

base is now HeapNumber with valid Smi value.

说明：  h5聊天室仿红包群微信群源码，可以发红包，做一个网站版的聊天室。(H5 Chat Room Micro Message Group Source Code Imitating Red Packet Group)

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 )

该程序实现了跳时UWB技术的调制与解调，对于UWB系统的设计具有一定参考价值(this program realize TH UWB with modulation and demodulation module.it has significant value for UWB system design.)

该工程是有关CPFSK（连续相位调制）的完整工程。帧结构包含训练序列、前导码、同步码、数据长度等信息，使用正交调制方式产生CPFSK的信号，生成基带IQ数据。接收端包含帧同步、滤波、解算长度等算法。可实现任意长度字符串的无线发送与接收。工程十分完整喝强大，可直接用于各大SDR平台的验证。(The project is a complete project of CPFSK (continuous phase modulation). The frame structure contains training sequence, preamble, synchronization code, data length and other information, and uses orthogonal modulation to generate CPFSK signals and generate baseband IQ data. The receiver includes algorithms such as frame synchronization, filtering, and calculating length. It can realize wireless sending and receiving strings of arbitrary length. The project is complete and powerful, and can be directly applied to the verification of major SDR platforms.)

本程序利用改进的CHOW算法，仿真了自自适应OFDM系统的性能，并画出了SNR (This program makes use of improved CHOW algorithm simulates the performance of self-adaptive OFDM system, and draw the SNR)