A NEW M-ARY WIDE-BAND COMMUNICATION-SYSTEM WITH APPLICATION TO MULTIPATH CHANNELS .1. SYSTEM PERFORMANCE

We present here a new M-ary wideband communication system based on use of binary spread-spectrum sequences and a correlation receiver. The p roposed system offers a significant savings in receiver complexity com pared to classical M-ary systems as only one correlator is required an d also the word synchronization can be automatically made. The sequenc es used here were primarily described by Yates and Holgate and general ized by Potter. A set of Yates-Holgate (Y-H) sequences is constructed from a single m-sequence called the ''parent.'' When any sequence in t he set is cross correlated with the ''parent,'' the obtained cross-cor relation function (CCF) has a shape that simply and uniquely identifie s that sequence-in the same time it defines the word synchronization. The transmitter associates k information bits to a sequence of N chips selected in a Y-H set of M = 2(k) sequences. The receiver correlates the received sequence with the parent and hence can decide what sequen ce has been transmitted. In this way, the receiver can recover the k i nformation bits. In this paper (Part I of two), we present the perform ance of this system in a nonfading channel with additive white Gaussia n noise and in some multipath channels.