Channel estimation and demodulation of asynchronous CDMA signals in frequency-selection fading channels

C. Carlemalm, A. Logothetis, H. Vincent Poor

Research output: Contribution to journalConference articlepeer-review

Abstract

In this paper, we propose an iterative scheme for joint tracking of fading channels and demodulation of multiuser CDMA signals operating asynchronously over multipath fading channels. We use the expectation maximization algorithm to track the time-varying channel and as a by-product we also achieve estimates of the input signals. We show that the maximum a posteriori estimates of the fading channels is iteratively computed by the Kalman smoother. The input signals are demodulated using a hidden Markov model smoother. Our scheme has computational complexity and memory requirement that grow linearly with the data length. Computer simulations illustrate the performance of our proposed detection and estimation method.

Original languageEnglish (US)
Article number7075699
JournalEuropean Signal Processing Conference
Volume2015-March
Issue numberMarch
StatePublished - Mar 31 2000
Event2000 10th European Signal Processing Conference, EUSIPCO 2000 - Tampere, Finland
Duration: Sep 4 2000Sep 8 2000

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering

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