bpsk

这是一个关于gmsk和msk性能分析比较的源程序，能很好的实现GMSK频谱和功率谱。(this a matlab program about gmsk and msk s dpinpu and gonglvpu.)

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.

Micro SCADA setting for iec60870-5-101

说明：  5G NR 的全链路仿真C代码，对学习5G算法和做5G研发的有很大的参考价值。(5g NR full link simulation C code has great reference value for learning 5g algorithm and doing 5g research and development.)

树莓派串口调试程序，可实现与单片机或者手机等通信。(te serial port testing program which can communicate with single chip machine or android cell phone.)

AWGN信道、瑞利衰落信道、多径信道条件下的OFDM信号与单载波信号的识别(AWGN channel, Rayleigh fading channels, multipath channel conditions, single-carrier OFDM signal with the signal recognition)

直扩CDMA系统仿真程序，信道包括加性白高斯噪声，复合加性白高斯噪声，瑞利衰落，频率选择性瑞利衰落，双信道瑞利衰落。(DS CDMA system simulation program, the channel including the additive white Gaussian noise, complex additive white Gaussian noise, Rayleigh fading, frequency selective Rayleigh fading, dual-channel Rayleigh fading.)

关于MIMO-OFDM的信号检测方法，ML检测(Signal detection method for MIMO-OFDM, ML detection)

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.)

LDPC coded OFDM system for power line communication in the presence of both AWGN and Impulsive noise..