Title :
The adaptive rake matched filter in a time-variant two-path channel
Author :
Kaasila, Veli-Pekka ; Mämmelä, Aarne
Author_Institution :
Telecommun. Lab., Oulu Univ., Finland
Abstract :
The effect of channel estimation errors upon the performance of an adaptive rake matched filter in a DS spread-spectrum system is studied in a two-path channel. A moving average filter with a memory of M bit intervals is used in the channel estimation. The estimation errors are mainly caused by channel noise and channel impulse response variations during the observation interval. The performance of the adaptive rake depends strongly on the selection of M. The optimal value of M depends on the signal-to-noise ratio and on the variation rate of the channel
Keywords :
adaptive filters; digital filters; error analysis; matched filters; radiofrequency filters; spread spectrum communication; telecommunication channels; transient response; DS spread-spectrum system; adaptive rake matched filter; channel estimation errors; channel impulse response; channel noise; memory; moving average filter; observation interval; performance; signal-to-noise ratio; time-variant two-path channel; variation rate; Binary phase shift keying; Channel estimation; Delay estimation; Estimation error; Fading; Matched filters; Multipath channels; RAKE receivers; Spread spectrum communication; Transmitters;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1992. Proceedings, PIMRC '92., Third IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0841-7
DOI :
10.1109/PIMRC.1992.279891
