TY - GEN
T1 - Pilot diversity channel estimation in power controlled CDMA systems
AU - Luo, Tao
AU - Ko, Young Chai
PY - 2003
Y1 - 2003
N2 - In this paper, we consider a channel estimator in CDMA systems, where there exist both common pilot channel (CPICH) symbols, which is not power controlled signal, and the dedicated pilot symbols, which is power-controlled. Our proposed channel estimator estimates the channel by combining the CPICH symbols and dedicated pilot symbols. We derive the maximal likelihood (ML) estimator and present the approximate ML, which can be readily used for fast and accurate on-line channel estimation. We also derive the Cramer-Rao lower bound (CRLB) of the proposed method and compare it with the CRLB of the method using the common pilot channel symbols only. End-to-end full downlink SPW simulations have been run and we confirm that the significant gain can be achieved with a proposed estimator in a power-controlled CDMA system. The resulting algorithms can be applied to open loop and closed loop transmit diversity cases as well as single antenna case.
AB - In this paper, we consider a channel estimator in CDMA systems, where there exist both common pilot channel (CPICH) symbols, which is not power controlled signal, and the dedicated pilot symbols, which is power-controlled. Our proposed channel estimator estimates the channel by combining the CPICH symbols and dedicated pilot symbols. We derive the maximal likelihood (ML) estimator and present the approximate ML, which can be readily used for fast and accurate on-line channel estimation. We also derive the Cramer-Rao lower bound (CRLB) of the proposed method and compare it with the CRLB of the method using the common pilot channel symbols only. End-to-end full downlink SPW simulations have been run and we confirm that the significant gain can be achieved with a proposed estimator in a power-controlled CDMA system. The resulting algorithms can be applied to open loop and closed loop transmit diversity cases as well as single antenna case.
UR - http://www.scopus.com/inward/record.url?scp=79955625128&partnerID=8YFLogxK
U2 - 10.1109/PIMRC.2003.1259086
DO - 10.1109/PIMRC.2003.1259086
M3 - Conference contribution
AN - SCOPUS:79955625128
SN - 0780378229
SN - 9780780378223
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
SP - 2107
EP - 2111
BT - PIMRC2003 - 14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, Proceedings
T2 - 14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC2003
Y2 - 7 September 2003 through 10 September 2003
ER -