TY - JOUR
T1 - Channel estimation for DS-CDMA downlink with aperiodic spreading codes
AU - Weiss, Anthony J.
AU - Friedlander, Benjamin
PY - 1999
Y1 - 1999
N2 - Synchronous code-division multiple-access (CDMA) techniques possess intrinsic protection against cochannel interference when orthogonal spreading codes are used. However, in the presence of multipath propagation, the signals lose their orthogonality property, leading to increased cross correlation. In these cases, channel estimation may be needed in order to improve detection. We propose and compare several algorithms for channel estimation of a synchronous CDMA point-to-multipoint link (downlink) that uses aperiodic spreading waveforms. We compare by simulation and analysis a subspace approach, a pilot-aided approach, and a decision-based approach.
AB - Synchronous code-division multiple-access (CDMA) techniques possess intrinsic protection against cochannel interference when orthogonal spreading codes are used. However, in the presence of multipath propagation, the signals lose their orthogonality property, leading to increased cross correlation. In these cases, channel estimation may be needed in order to improve detection. We propose and compare several algorithms for channel estimation of a synchronous CDMA point-to-multipoint link (downlink) that uses aperiodic spreading waveforms. We compare by simulation and analysis a subspace approach, a pilot-aided approach, and a decision-based approach.
UR - http://www.scopus.com/inward/record.url?scp=0033316880&partnerID=8YFLogxK
U2 - 10.1109/26.795824
DO - 10.1109/26.795824
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AN - SCOPUS:0033316880
SN - 0090-6778
VL - 47
SP - 1561
EP - 1569
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 10
ER -