Title :
Eigen-based receivers for the detection of random UWB signals
Author :
Zhang, Q.T. ; Song, S.H.
Author_Institution :
Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon
fDate :
7/1/2006 12:00:00 AM
Abstract :
Wireless ultra-wideband (UWB) receivers usually employ a deterministic clean pulse or pulses derived from a Gaussian monocycle as a template for correlation. A deterministic template cannot be expected to have high correlation with random UWB signals at all times. Such a mismatch can significantly degrade the system error performance. In this letter, a deterministic template is designed to maximize the energy capture capability on ensemble average, ending up with the eigen-based correlator. The eigen-based correlator can be used alone or alongside path diversity to further enhance signal detection. The new receivers outperform their counterparts using a clean pulse, as shown by theoretical analysis, and demonstrated by numerical results based on real UWB data
Keywords :
Gaussian processes; eigenvalues and eigenfunctions; radio receivers; signal detection; ultra wideband communication; Gaussian monocycle; eigen-based correlator; eigen-based receivers; random UWB signal detection; wireless ultra-wideband receivers; Correlators; Delay effects; Diversity reception; Energy capture; Fading; Multipath channels; Pulse measurements; Pulse modulation; Signal detection; Ultra wideband technology; Detection of ultra-wideband (UWB) signals; UWB receivers; diversity reception; eigen-based receivers; postcorrelation combining; random signal detection;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2006.877961
