Low-complexity frequency-domain algorithm for UWB timing
Mobility '07 Proceedings of the 4th international conference on mobile technology, applications, and systems and the 1st international symposium on Computer human interaction in mobile technology
Two-step synchronization for direct-sequence UWB systems with corresponding demodulation scheme
WOCN'09 Proceedings of the Sixth international conference on Wireless and Optical Communications Networks
Digital receiver design for transmitted reference ultra-wideband systems
EURASIP Journal on Wireless Communications and Networking - Special issue on synchronization in wireless communications
A novel synchronization algorithm dispensing with searching for UWB signals
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
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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. For a general correlation-based detector, we derived in Part I unifying expressions for the decision statistics as well as BER formulas under mistiming, given fixed channel realizations. In Part II, we provide a systematic approach to BER analysis under mistiming for fading channels. The BER is expressed in terms of the receiver's energy capture capability, which we quantify under various radio operating conditions. We also develop the optimal demodulator in the presence of timing offset and show a proper design of the correlation-template that is robust to mistiming. 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.