Continuous pilot based adaptive estimation for IDMA systems on underwater acoustic channels

Two adaptive receivers for jointly detecting active users in an interleave division multiple access (IDMA) system are considered for highly dispersive underwater acoustic channels (UACs) using a continuous pilot approach. A direct adaptive interference cancellation (IC) IDMA receiver is proposed and compared with the standard Rake-IDMA receiver that performs adaptive semi-blind channel estimation developed by the authors. Both iterative decoding receivers incorporate a phase locked loop (PLL) and are optimized based on the minimum mean square error (MMSE) criterion. The theoretical basis of both receivers is presented along with experimental results obtained by processing data from actual underwater communication experiments. The transmission results of 3 active users at a data

• Type: Journal
• Year: 2011
• Where: ICASSP
• Authors: Salah Aliesawi, Charalampos C. Tsimenidis, Bayan S. Sharif, Martin Johnston
• Keywords: Active Users, Adaptive Interference Cancellation, ICASSP 2011, Minimum Mean Square Error, Signal Processing