Multi-Subchannel Spread Spectrum for Anti-jam Communications

摘要

This paper presents a novel anti-jamming wireless communication system called Multi-Subchannel Spread Spectrum (MSCSS). It is based on M-ary spread spectrum (SS),direct sequence spread spectrum (DSSS),orthogonal frequency division multiplexing (OFDM),and multi-carrier code division multiple access (MC-CDMA). The signal is spread twice at the MSCSS transmitter using a channel pseudo-random code and a subchannel pseudo-random code. Each information bit is transmitted in time-division mode on 16 subchannels,and the pseudo-random codes over the subchannels are mutually orthogonal. At the receiver,an adaptive decision threshold is employed which provides improved anti-jamming performance.