Title :
Channel estimation and tracking in asynchronous uplink DS/CDMA using multiple antennas
Author :
Sirbu, Marius ; Koivunen, Visa
Author_Institution :
Signal Process. Lab., Helsinki Univ. of Technol., Finland
Abstract :
The channel estimation and tracking as well as the equalization for the uplink in asynchronous long code DS/CDMA is our concern in this paper. We derive a novel algorithm for multiple channel estimation. It is an adaptive algorithm which allows for tracking the time variations of the multiple channels simultaneously. A MMSE equalizer is derived also and it is used together with the proposed channel estimator in a decision directed (DD) mode. The performance of the proposed method is evaluated in nonstationary channel conditions.
Keywords :
adaptive equalisers; adaptive estimation; channel estimation; code division multiple access; least mean squares methods; mobile radio; spread spectrum communication; time-varying channels; tracking; MMSE equalizer; adaptive algorithm; asynchronous uplink DS/CDMA; decision directed mode; equalization; multiple antennas; multiple channel estimation; nonstationary channel; time varying channels; tracking; Base stations; Channel estimation; Delay estimation; Equalizers; MIMO; Multiaccess communication; Propagation delay; Receiving antennas; Signal processing algorithms; Transmitting antennas;
Conference_Titel :
Digital Signal Processing, 2002. DSP 2002. 2002 14th International Conference on
Print_ISBN :
0-7803-7503-3
DOI :
10.1109/ICDSP.2002.1028171
