Blind equalization of space-time-turbo trellis coded/contilluous phase modulation over Rician fading channels

Ucan O., Osman O.

EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS, cilt.15, ss.447-458, 2004 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 15 Konu: 5
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1002/ett.994
  • Dergi Adı: EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS
  • Sayfa Sayıları: ss.447-458

Özet

In this paper. to improve bit error performance and bandwidth efficiency. we combine space-time blockcodes (STBC), turbo trellis codes and continuous phase modulation and denote space-time-turbo trellis coded/continuous phase modulation (ST-TTC/CPM). For high data transmission over wireless fading! channels, STBC provide the maximal possible diversity advantage for multiple decoding algorithm. We present continuous phase modulation (CPM) for ST-TTC signal. mince CPM provided low-Spectral occupancy and is suitable for power and bandwidth-limited channels. In our model. to utilize STBC efficiently. we need to estimate the channel parameters. which influence the signals having continuity property. Therefore, we develop a blind maximum likelihood channel estimation algorithm for signal propagating through a Rician fading channel. Here. Baum-Welch (BW) algorithm based on hidden Markov model (HMM) is modified to provide computationally efficient channel parameter estimation. We also investigate the performance of ST-TTC/CPM in the case of no channel state information (CSI) for various Rician parameters K and Doppler frequency. Copyright (C) 2004 AEI.