Symbol timing recovery using oversampling techniques

Abstract

It is advantageous to use oversampling techniques with either AX or broadband data converters in both wireline and wireless digital receivers. This paper discusses the oversampling techniques for all-digital implementation of symbol timing recovery in digital receivers. The idea of oversampling techniques for timing recovery is to adjust the timing phases while decimating the oversampled signals. The spurious signal introduced by adjusting the CIC's (cascaded integrator-comb) timing phase has been analyzed and was found to be a serious problem. In this paper, a dual-differentiator timing phase adjustable decimation filter has been proposed and was used for symbol timing recovery. Simulations were provided to verify the validity of the proposed method.

The Effect of Imperfect Symbol Timing Estimation on the Performance of Space-Time Coded Systems

“…There are a number of techniques to recover the symbol timing. In gener they can be categorized as [10]: pure analog timing recovery, mixed (analog-digital) timi recovery, and all-digital timing recovery. The first two techniques require voltage controll oscillator (VCOs) to create synchronized timing clocks, these techniques are mainly used conventional receivers, where the symbol synchronization is performed using a feedback lo which controls the phase of the sampling clock.…”