Low Correlation Sequences for CDMA

Abstract

Summary form only given. Low-correlation pseudorandom sequences find applications in navigation (global positioning system), radar ranging, cryptography, signal synchronization, spread-spectrum communications, multipath resolution and signal identification in multiple-access communication systems. In direct-sequence code division multiple access (DS-CDMA) systems, low-correlation spreading sequences are employed to separate the signals of different users. The first half of this tutorial would focus on the properties and applications of some binary sequence families (Gold, Kasami). Thereafter, we discuss some quaternary sequence families - Family A and Family S(2). Towards the end, we present our recent results on QAM sequences.