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probability of error far worse than that of the standard noise or fading channel. So much, that the

noise is often ignored as it is insignificant compared to the jamming. The worst method of

jamming to any time varying spread spectrum system is known pulsed-noise jamming.

Examining the performance of a SESS system under these conditions can help to show the

versatility of SESS. As well as, give possible insight to future improvements that could add to

the security and performance of SESS.

This thesis will provide a background, as well as, performance measures for binary PN

sequences in chapter two. Then chapter three will outline the SESS system, that uses the no PN

sequences, and analyze the performance SESS system in AWGN and Rayleigh fading channels.

Also, introduced and analyzed in this chapter is an iterative detector that is used to help increase

the performance of SESS. Chapter four establishes the jamming channel and sets up the worst-

case jamming model. While chapter five analyzes effects of worst-case jamming on SESS,

chapter five focuses on the effects of worst-case jamming on the iterative detector. Finally,

chapter seven looks at possible solutions to help the worst-case jamming and examines the

effects of jamming inside of AWGN and Rayleigh fading channels.

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