THE BANDWIDTH OF SPREAD SPECTRUM SIGNALS

Abstract

Although spread spectrum systems depend on large bandwidth to achieve performance, they must also operate within bandwidth constraints imposed by frequency allocations. The measures of bandwidth relevant to performance are usually quite different from those defined in frequency allocations. In this paper a number of definitions of bandwidth are discussed, and a number of direct sequence pseudonoise (DSPN) modulation techniques are evaluated according to those definitions of bandwidth. A wide range of bandwidths per chip rate result, and trades among the modulation types are given.