Research for Concatenation of CRC and Interleaver in QPSK Transmission System

We mainly make researches for CRC and interleaver in OPSK transmission system.We firstly design a QPSK transmission system based on MATLAB/Simulink platform, then CRC coding is applied in the QPSK transmission system.After debugging and testing, the received waveforms are consistent with the transmitted waveforms, which can indicate that the system design is effective.Further, we make concatenation CRC and Interleaver in QPSK system.According to data comparison, it can be concluded that CRC can decrease the symbol error rate and improve system reliability performance, up to 3 dB of the signal to noise ratio gain can be achieved.Concatenation coding can make a further performance improvement.This researches can give a new method for simulation design of communication system, and provides a new idea for experimental teaching.