madqm

GSM链路级仿真程序，按照基本GSM规范编写而成。(GSM link level simulation program, written in accordance with the basic GSM standard.)

说明：  在实际的调谐解调电路中，采用的是非相干载波解调，本振信号与发射端的载波信号存在频率偏差和相位抖动，因而解调出来的模拟I、Q基带信号是带有载波误差的信号。这样的模拟基带信号即使采用定时准确的时钟进行取样判决，得到的数字信号也不是原来发射端的调制信号，误差的积累将导致抽样判决后的误码率增大，因此数字QPSK解调电路要对载波误差进行补偿，减少非相干载波解调带来的影响。(In the actual tuning and demodulating circuit, non-coherent carrier demodulation is adopted, and the frequency deviation and phase jitter of the local oscillator signal and the carrier signal of the transmitting end are present, and thus the demodulated analog I and Q baseband signals are signals with carrier error.)

lte中mac层的调度方案 其中包括 pf调度和rr调度(the scheduling meanings in mac of lte which include pf and ff)

仿真FH跳频通信系统的整个过程,同时可观察到工作原理及信号等(FH frequency hopping communication system simulation of the whole process can also be observed that the working principle and signal)

说明：  最大限度地平 FIR 逼近 （拉格朗日插值法） 拉格朗日插值是一种时域方法，导致基于多项式的筛选器的一个特殊情况。用 M 次多项式近似表示输出信号。最简单的情况 (M = 1) 对应于线性插值。让我们设计和分析将通过各种馏分拆分单元延迟的几种线性分数时滞滤波器：(Maximally-Flat FIR Approximation (Lagrange Interpolation) Lagrange interpolation is a time-domain approach that leads to a special case of polynomial-based filters. The output signal is approximated with a polynomial of degree M. The simplest case (M=1) corresponds to linear interpolation. Let's design and analyze several linear fractional delay filters that will split the unit delay by various fractions:)

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)

改进papr，对于改进papr的程序给了完整的代码，具有参考价值(Improved papr, for improving the procedures papr)

说明：  MATLAB信号检测仿真例子 参数都已知的GLRT检测(MATLAB signal detection simulation example)

通过Prodave 6.0对西门子S7-300控制器（以太网）的I,Q,PI,PQ，M,DB，C,T等寄存器进行读写操作(Through Prodave 6.0 control Siemens S7-300 s (Ethernet) I, Q, PI, PQ, M, DB, C, T registers, read and write operations)

作为TCP客户端跟TCP服务端进行通讯，支持modbus协议(As a TCP client to communicate with the TCP server to support the modbus protocol)