Simulation of a Coded Spread Spectrum System for the Impulsive and Multipath Channel

Abstract

Performance of a direct sequence spread spectrum communication system operating in an impulsive noise and multipath channel is evaluated using computer simulation techniques. The results indicate that the direct sequence spread spectrum receiver tends to convert the block error pattern in to random error pattern and further application of convolutional coding with Viterbi decoding gives substantial improvement in performance. Balanced Gold codes are found to perform better than Gold codes and m-sequences.

Indexing terms:

• Spread spectrum communication
• Eerror correcting code
• Digital computer simulation
• Viterbi decoding
• Soft decision decoding
• Multipath channel
• Impulsive noise channel
• Atmospheric noise