@article{(Open Science Index):https://publications.waset.org/pdf/3493,
	  title     = {Discrete Polyphase Matched Filtering-based Soft Timing Estimation for Mobile Wireless Systems},
	  author    = {Thomas O. Olwal and  Michael A. van Wyk and  Barend J. van Wyk},
	  country	= {},
	  institution	= {},
	  abstract     = {In this paper we present a soft timing phase estimation (STPE) method for wireless mobile receivers operating in low signal to noise ratios (SNRs). Discrete Polyphase Matched (DPM) filters, a Log-maximum a posterior probability (MAP) and/or a Soft-output Viterbi algorithm (SOVA) are combined to derive a new timing recovery (TR) scheme. We apply this scheme to wireless cellular communication system model that comprises of a raised cosine filter (RCF), a bit-interleaved turbo-coded multi-level modulation (BITMM) scheme and the channel is assumed to be memory-less. Furthermore, no clock signals are transmitted to the receiver contrary to the classical data aided (DA) models. This new model ensures that both the bandwidth and power of the communication system is conserved. However, the computational complexity of ideal turbo synchronization is increased by 50%. Several simulation tests on bit error rate (BER) and block error rate (BLER) versus low SNR reveal that the proposed iterative soft timing recovery (ISTR) scheme outperforms the conventional schemes.
},
	    journal   = {International Journal of Electronics and Communication Engineering},
	  volume    = {3},
	  number    = {4},
	  year      = {2009},
	  pages     = {1016 - 1023},
	  ee        = {https://publications.waset.org/pdf/3493},
	  url   	= {https://publications.waset.org/vol/28},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 28, 2009},
	}