Pilot-symbol-assisted communications with noncausal and causal Wiener filters

Research output: Contribution to conferencePaper

2 Scopus citations

Abstract

In this paper, pilot-assisted transmission over time-selective flat fading channels is studied. It is assumed that noncausal and causal Wiener filters are employed at the receiver to perform channel estimation with the aid of training symbols sent periodically by the transmitter. For both filters, the variances of estimate errors are obtained from the Doppler power spectrum of the channel. Subsequently, achievable rate expressions are provided. The training period, and data and training power allocations are jointly optimized by maximizing the achievable rate expressions. Numerical results are obtained by modeling the fading as a Gauss-Markov process. The achievable rates of causal and noncausal filtering approaches are compared. For the particular ranges of parameters considered in the paper, the performance loss incurred by using a causal filter as opposed to a noncausal filter is shown to be small. The impact of aliasing that occurs in the undersampled version of the channel Doppler spectrum due to fast fading is analyzed. Finally, energy-per-bit requirements are investigated in the presence of noncausal and causal Wiener filters.

Original languageEnglish (US)
Pages291-295
Number of pages5
DOIs
StatePublished - Dec 1 2008
Externally publishedYes
Event2008 IEEE 9th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2008 - Recife, Brazil
Duration: Jul 6 2008Jul 9 2008

Other

Other2008 IEEE 9th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2008
CountryBrazil
CityRecife
Period7/6/087/9/08

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Information Systems

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    Akin, S., & Gursoy, M. C. (2008). Pilot-symbol-assisted communications with noncausal and causal Wiener filters. 291-295. Paper presented at 2008 IEEE 9th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2008, Recife, Brazil. https://doi.org/10.1109/SPAWC.2008.4641616