QPSK_FS_uncoded_curve20071029

16位CRC校验原理与算法分析，很详尽，学习CRC16的重要资料。(16-bit CRC checksum algorithm theory and analysis, very detailed and important information to learn CRC16.)

HLP A+ Modbus 标准通讯协议格式，上位机发送数据格式，正确时变频器返回数据格式(This bit will be set to logic 1 when the receive buffer has been read and contains no new information. If there is new information available in the receive buffer that has not been read, this bit will return to logic 0. RXBMT = 1 when in Master Mode.)

目标跟踪，程序利用卡尔曼滤波器对对圆周运动的目标进行跟踪。绘制出期望信号、观测信号和滤波后点目标的运动轨迹。(Target tracking, the program the use of Kalman filter, right, right circular motion of the target being tracked. Draw out the desired signal, observation point target signal and the filtered trajectories.)

OWDM simulation QAM 16/64

说明：  此代码为4ASK发送调制与接收解调的通信系统，为主要代码(Communication system of 4ask transmitting modulation and receiving demodulation)

ofdm system 1. applyOFDMChannel 2. calculateOFDMBER 3. generateOFDMSignal 4. getOFDMPreambleAndPilot 5. OFDMReceiver 6. OFDMSynchronizationExample 7. OFDMTransmitter 8. processOFDMScopes 9. receiveOFDMSignal

通信仿真的学习书籍，simulation中的仿真使用介绍，通信专业初学者适用(Communication simulation learning books, simulation simulation introduction, communication professionals, beginners apply)

说明：  设计一个巴特沃兹数字低通滤波器，其技术指标为：3dB带宽为0.2π，阻带截止频率为0.3π，通带纹波为1dB，阻带衰减大于30dB，采样间隔T=10ms。 1）采用冲激响应不变法； 2）采用双线性变换法设计； 3）采用FIR的窗函数（Hanning窗、Hamming窗或Blackman窗）设计。(A Butterworth digital low-pass filter is designed. Its technical specifications are: 3 dB bandwidth is 0.2 pi, stopband cut-off frequency is 0.3 pi, passband ripple is 1 dB, stopband attenuation is more than 30 dB, sampling interval T=10 Ms. 1) Impulse response invariance method is adopted. 2) Design by bilinear transformation method; 3) FIR window function (Hanning window, Hamming window or Blackman window) is used to design.)

无线通信中，设备到设备技术的控制可控制，提高抗干扰能力，频谱利用率(In wireless communications, control of equipment-to-equipment technology can be controlled to improve anti-interference ability, spectrum utilization)

单模光纤中相干接收QPSK信号应用了CMA算法的简单DSP示例，自带vpa仿真数据。(A simple DSP example of CMA algorithm is used to receive QPSK signals coherently in single-mode optical fibers, with VPA simulation data.)