Title :
BER sensitivity to mistiming in ultra-wideband impulse Radios-part I: nonrandom channels
Author :
Tian, Zhi ; Giannakis, Georgios B.
Author_Institution :
Electr. & Comput. Eng. Dept., Michigan Technol. Univ., Houghton, MI, USA
fDate :
4/1/2005 12:00:00 AM
Abstract :
We investigate timing tolerances of ultra wideband (UWB) impulse radios. We quantify the bit-error-rate (BER) sensitivity to epoch timing offset under different operating conditions, including frequency flat fading channels, dense multipath fading channels, multiple access with time hopping, and various receiver types including sliding correlators and RAKE combiners. Our systematic approach to BER derivations under mistiming can be extended to a wide range of channel fading types. Through analyses and simulations, we illustrate that the reception quality of a UWB impulse radio is highly sensitive to both timing acquisition and tracking errors. In particular, time-hopping-based multiple-access systems exhibit little tolerance to acquisition errors, and the energy capture capability of a RAKE combiner can be severely compromised by mistiming.
Keywords :
error statistics; fading channels; multi-access systems; multipath channels; radio receivers; sensitivity; ultra wideband communication; BER sensitivity; bit-error-rate; frequency flat fading channel; multipath fading channel; nonrandom channel; rake combiner; synchronization; time-hopping-based multiple-access system; ultrawideband impulse radio; Bit error rate; Correlators; Degradation; Fading; Performance analysis; Pulse modulation; RAKE receivers; Throughput; Timing; Ultra wideband technology; Mistiming; RAKE receiver; performance analysis; synchronization; ultra wideband communications;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2005.843747