yuandaima

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.)

由中频信号捕获到跟踪、解算等一系列处理GPS接收机链路实现(Implementation of GPS receiver link)

降低OFDM系统峰均比的PTS算法源码，经过MATLAB仿真成功(Reduce the PAPR of OFDM system PTS algorithm source, after the success of MATLAB simulation)

说明：  进行FDOA频差定位的程序，计算GDOP(Carry out FDOA frequency difference positioning program and calculate GDOP)

si4432射频芯片的中文开发资料，寄存器配置等(the si4432 radio frequency chip Chinese development information, register allocation)

说明：  利用k分布的海杂波仿真matlab 程序(Sea clutter simulation)

433编程程序实例,非常好用的程序代码，容易移植(433 hello mkdadahfadna gacaca)

扫频信号的产生，以及扫频信号的时频分析；(The generation of sweep frequency signal and the time frequency analysis of sweep signal;)

在matlab环境下实现通信系统中的BPSK，QPSK，16QAM，调制。成型滤波和匹配滤波都采用根升余弦函数。(In the matlab environment to achieve communication system BPSK, QPSK, 16QAM, modulation. Shaping filter and matched filter are used root raised cosine function. )

ofdm仿真程序有关信道传输中的多径效应，多普勒频移，时延扩展(OFDM simulation program on the transmission channel of multi-path effects, Doppler frequency shift, delay spread)