Spread Spectrum Techniques for Interference Mitigation in Large Bandwidth

Communication links are vulnerable to signal fratricide and intentional interference. Therefore, there is a strong interest for interference resistant links to enable secure communication protocols. One way to achieve interference immunity is by exploiting Spread Spectrum (SS) coding techniques with significant coding gain. With access to large bandwidth, it is now possible to spread the signal below the noise floor and secure reliable communication. The focus of this paper is to present a Direct Sequence Spread Spectrum - Binary Phase Shift Keying (DSSS-BPSK) modulation link with over 1 GHz signal bandwidth, in presence of collocated multiple high power interferers. It is observed that DSSS results in better bit error rate (BER) performance. This improvement was in presence of an interferer-signal (I/S) ratio of 34.34 dB.