Abstract
Based on LabVIEW, the DSSS communication system under TCP/IP protocol is developed. It uses dual frequency USB wireless network card with a low price to build the wireless communication channel between PCS. The transmitter can generate spread spectrum signals with different time delays of different users’ data which could be used to simulate the multipath propagation in mobile communication. The receiver uses different m sequences with different time delays to despread the received signal. The system can display the time domain waveform comparison and power spectrum comparison before and after processing, as well as the bit error rate under different parameters. They play a very good role in theoretical analysis and verification. The use of teaching assistant system is conducive to improve students’ interest in study and design.
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