ABSTRACT
Spread spectrum signals typically refer to signals that use a bandwidth that is significantly higher than the minimum bandwidth required to transmit that information sequence. Although bandwidth is a precious commodity, increasing the bandwidth of the signal prior to transmission results in several advantages: (i) The resulting power spectral density (PSD) of the spread signal is lower than the PSD of the signal prior to spreading. (ii) The resulting signal is more resistant to narrow band interference/jamming. (iii) The signal has a low probability of being intercepted. (iv) The spread signal is readily suitable for multiple access. These advantages have resulted in several military and commercial applications for spread spectrum systems.
