Title :
P-order metric UWB receiver structures with superior performance
Author :
Beaulieu, Norman C. ; Hua Shao ; Fiorina, Jocelyn
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB
fDate :
10/1/2008 12:00:00 AM
Abstract :
The generalized Gaussian probability density function is shown to better approximate the probability density function of the multiple access interference in ultra-wide bandwidth systems than the Gaussian approximation and the Laplacian density approximation. Two ultra-wide bandwidth receiver structures based on this new approximation using a p-order metric receiver decision statistic are investigated for the detection of time-hopping ultra-wide bandwidth wireless signals in multiple access interference channels. The first receiver outperforms both the conventional matched filter ultra-wide bandwidth receiver and the soft-limiting ultra-wide bandwidth receiver when only multiple access interference is present in UWB channels. The second new receiver with adaptive limiting threshold outperforms the conventional matched filter ultra-wide bandwidth receiver, the soft-limiting ultra-wide bandwidth receiver, and the adaptive threshold soft limiting ultra-wide bandwidth receiver in all multiple access interference-plus-noise environments. In multipath channels, a new Rake receiver based on the p-order metric receiver is proposed for signal detection. Mathematical analysis and numerical results show that this new Rake receiver can achieve larger signal-to-interference-plus-noise ratio than the standard matched filter Rake receiver when multipath components are resolvable in UWB channels.
Keywords :
matched filters; multipath channels; radio receivers; ultra wideband communication; Gaussian approximation; Gaussian probability density function; Laplacian density approximation; Rake receiver; UWB receiver; matched filter; multipath channels; multiple access interference channels; signal-to-interference-plus-noise ratio; Bandwidth; Fading; Gaussian approximation; Laplace equations; Matched filters; Multipath channels; Multiple access interference; Probability density function; RAKE receivers; Statistics; Bit error rate; Rake receiver; demodulation; digital receivers; multipath channels; multiple access interference; ultra-wide bandwidth;
Journal_Title :
Communications, IEEE Transactions on
Conference_Location :
10/1/2008 12:00:00 AM
DOI :
10.1109/TCOMM.2008.060584