Comparative Study of Self-Encoded Spread Spectrum and PN Coded Spread Spectrum in Cooperative Communication
In this paper, the authors propose Self-Encoded Spread spectrum combined with cooperative diversity to combat against the effects of fading in wireless channel. Cooperative diversity technique is employed with the intention of achieving spatial diversity gain using relay nodes. Self-Encoded Spread Spectrum (SESS) and multiple access communications have been proposed and exhibit some unique characteristics such as Low Probability of Detection (LPD) and inherent memory. It has been demonstrated that the inherent temporal diversity in SESS modulation can be exploited by using iterative detection to significantly improve the system performance over time-varying fading channels.