The disclosed spread spectrum system has the reference transmitted on one phase (basis vector) of a .pi./2-offset QPSK signal, and the spread data signal transmitted on another phase (basis vector). The two received phases are combined to recover the baseband signal. Such a transmission system is tolerant...http://www.google.fr/patents/US5559828?utm_source=gb-gplus-shareBrevet US5559828 - Transmitted reference spread spectrum communication using a single carrier with two mutually orthogonal modulated basis vectors
Transmitted reference spread spectrum communication using a single carrier ...
