TY - JOUR
T1 - On optimal ambiguity resistant precoders in ISI/multipath cancellation
AU - Xia, Xiang Gen
AU - Zhou, Guangcai
PY - 2000/8
Y1 - 2000/8
N2 - Ambiguity resistant (AR) preceding has recently been proposed in intersymbol interference (ISI) and multipath cancellations, where the ISI/multipath channel may have frequency-selective fading characteristics and its knowledge is not necessarily known. With the AR preceding, no diversity is necessary at the receiver. In the precoding, the AR property for a precoder plays an important rule. In this paper, more families and properties of AR precoders are presented and characterized. In particular, all systematic AR precoders are characterized. More importantly, we introduce the concepts of precoder distance and optimal precoders, and characterize and construct all optimal systematic AR precoders, when additive channel random noise is concerned. A necessary and sufficient condition for an AR precoder to he optimal is given, which is easy to check. With the optimal precoders, numerical simulations are presented to show the improved performance over the known AR precoders in ISI cancellation applications.
AB - Ambiguity resistant (AR) preceding has recently been proposed in intersymbol interference (ISI) and multipath cancellations, where the ISI/multipath channel may have frequency-selective fading characteristics and its knowledge is not necessarily known. With the AR preceding, no diversity is necessary at the receiver. In the precoding, the AR property for a precoder plays an important rule. In this paper, more families and properties of AR precoders are presented and characterized. In particular, all systematic AR precoders are characterized. More importantly, we introduce the concepts of precoder distance and optimal precoders, and characterize and construct all optimal systematic AR precoders, when additive channel random noise is concerned. A necessary and sufficient condition for an AR precoder to he optimal is given, which is easy to check. With the optimal precoders, numerical simulations are presented to show the improved performance over the known AR precoders in ISI cancellation applications.
UR - http://www.scopus.com/inward/record.url?scp=0034251109&partnerID=8YFLogxK
U2 - 10.1109/82.861407
DO - 10.1109/82.861407
M3 - Article
AN - SCOPUS:0034251109
SN - 1057-7130
VL - 47
SP - 746
EP - 756
JO - IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing
JF - IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing
IS - 8
ER -