communication system is expected to increase the service, the quality improvement and also the capacity, using spread spectrum communication system is one of the method to fulfill that demand. This quality and capacity factor will depend on the numb

We have proposed a digitally implemented QPSK system for Free-Space Optics (FSO) systems for future satellite missions. We have used a Laser source of 1550nm wavelength and data rate of 2.5Gbps.The system consists of a modulating and a demodulating b

基于OFDM调制解调通信系统的频偏估计技术matlab程序，对于研究者具有非常重要的参考价值。-QPSK modulation and demodulation literature, including modulation and demodulation, shaping filter, matched filtering, carrier synchronization, bit synchronization and other key technologies. For engine