Training Sequence Optimization for Joint Channel and Frequency Offset Estimation

Abstract-- We consider single-carrier and single-user transmissions over a frequency-selective channel. We address the problem of joint estimation of the channel and the carrier frequency offset using a known training sequence (TS). Since in general the TS that is optimum for CFO estimation is not optimum for channel estimation, here we design the TS to minimize the MeanSquare Error on the soft estimates of the data symbols obtained using a Wiener equalizer after CFO compensation. Our design results apply to the general scenarios of correlated and/or Ricean channel taps. Simulations measuring the bit error rate show an interesting gain when using the proposed training schemes in lieu of standard schemes.

• Type: Journal
• Year: 2008
• Where: TSP
• Authors: Philippe Ciblat, Pascal Bianchi, Mounir Ghogho
• Keywords: CFO Estimation, Estimation, Known Training Sequence, TSP 2008