Chapter 2 Direct Sequence Spread Spectrum and Spreading Codes
2.1. Introduction
In this chapter we describe the different types of Spread Spectrum (SS) systems that are used and then focus on the Direct Sequence Spread Spectrum (DSSS) technique that is employed in CDMA IS-95 systems. We develop the necessary relationships to evaluate the performance of a DSSS system with Binary Phase-Shift Keying (BPSK) and Quadrature Phase-Shift Keying (QPSK) modulation schemes and provide a relationship to calculate the performance of a CDMA system.
2.2. Types of Techniques Used for Spread Spectrum
Since the late 1940s, SS techniques have been used for military applications in which clandestine operation is a major objective. SS techniques provide excellent ...
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