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Linear Symbol Precoding for Low Complexity V -B LA ST O F D M Systems
 

Summary: Linear Symbol Precoding for Low Complexity
V -B LA ST O F D M Systems
H imal A . Su raweera, Jau nty T . Y . H o and Jean A rmstrong
Abstract-- In this paper we propose a low complexity
linear precod ed V ertical B ell L ab s L ayered S pace-T ime
(V -B L A S T ) orthog onal freq u ency d iv ision mu ltiplexing
(O F D M ) system b ased on Q R d ecomposition. A conv en-
tional u ncod ed V -B L A S T O F D M system exhib its sig nifi cant
system d eg rad ation in a freq u ency selectiv e fad ing channel
as it d oes not fu lly exploit the av ailab le freq u ency d iv ersity.
T he new precod ed scheme exhib its consid erab le error
performance improv ement ov er a conv entional V -B L A S T
O F D M Q R system. S imu lation resu lts for b oth linear and
maximu m lik elihood estimators ind icate a trad e off b etween
the allowab le complexity ag ainst the achiev ab le system
performance. A n extend ed analysis for error propag ation
across the d ifferent layers in the case of V -B L A S T O F D M
is also presented .
I. IN T R O D U CT IO N
Commu nication systems employing mu ltiple-inpu t

  

Source: Armstrong, Jean - Department of Electrical and Computer Systems Engineering, Monash University

 

Collections: Engineering