Abstract
ber , IEEE,D e y i P i, Member , IEEE, and
Payam Heydari, Senior Member , IEEE
Abstract—This paper presents the design and implementation
of a novel multi-antenna receiver front-end, which is capable of
accommodating various multi-antenna schemes including spa-
tial multiplexing (SM), spatial diversity (SD), and beamforming
(BF). The use of orthogonal code-modulation at the RF stage
of multi-antenna signal paths enables linear combination of all
mutually orthogonal code-modulated RF received sig