Symbol timing recovery techniques for digital wireless personal telecommunication systems

The performance of two symbol timing recovery subsystems (STRS) in the presence of generalized cochannel interference (CCI) is studied by means of analysis and computer simulation. The considered STRS are based on non-data aided (NDA) and data-aided (DA) techniques, and have previously been analyzed for the additive white Gaussian noise channel. The authors derive expressions for the root mean square (RMS) symbol timing jitter for both STRS as a function of the various CCI channel parameters and the modulation scheme. It is shown that the performance of the DA STRS is independent of the number of interferers, which is not the case for the NDA STRS. It is also found that the DA STRS outperforms the NDA STRS, although the difference in performance decreases as the interference level decreases. Bit error rate performance evaluation results complement the analysis