Many multiuser (collaborative) codes require a discrete multiple-access channel that provides the arithmetic addition of the users' transmitted symbol values. Problems arise with the transmission of bandpass symbols since the desired addition normally requires the users' carriers to be phasecoherent at the receiver. The letter proposes a simple modulation scheme which provides the required symbol addition with arbitrarily phased carriers.
Published in:
Electronics Letters
(Volume:21
,
Issue:
22
)
Date of Publication: October 24 1985