Pilot diversity channel estimation in power controlled CDMA systems

Tao Luo, Young Chai Ko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationPIMRC2003 - 14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, Proceedings
Pages2107-2111
Number of pages5
DOIs
Publication statusPublished - 2003
Externally publishedYes
Event14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC2003 - Beijing, China
Duration: 2003 Sep 72003 Sep 10

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
Volume3

Other

Other14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC2003
CountryChina
CityBeijing
Period03/9/703/9/10

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Luo, T., & Ko, Y. C. (2003). Pilot diversity channel estimation in power controlled CDMA systems. In PIMRC2003 - 14th IEEE 2003 International Symposium on Personal, Indoor and Mobile Radio Communications, Proceedings (pp. 2107-2111). [1259086] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC; Vol. 3). https://doi.org/10.1109/PIMRC.2003.1259086