SIMULTANEOUS CLOCK PHASE AND FREQUENCY OFFSET ESTIMATION

Residual frequency offsets may often result in poor functioning of a d igital receiver, This is particularly true in a frequency selective en vironment where an adaptive equalizer may be required. In this paper, a frequency offset estimation algorithm Is presented which is based on applying a nonlinear operation on the received sampled baseband signa l, Tones at multiples of the clock frequency are produced and the phas es of these tones provide both the desired frequency offset and clock phase information, This algorithm is intended to operate without knowl edge of the pulse shape and therefore may be suitable for frequency se lective environments, Additionally, the clock phase may be estimated w ith very little overhead, Simulations with AWGN, flat and frequency se lective fading channels are included.