We present a communication scheme aimed to improve robustness of impulse-UWB energy-detector receivers in the presence of narrowband interference. We first show that for this receivers, the matched filter waveform depends on interferer phase and amplitude, and it can become null for jammers with carrier frequency close to that of the desired channel. We then show that by multiplying the transmitted signal with an appropriately chosen, non-pseudo-random, unit-norm sequence, the baseband energy is maintained within 6 dB of the ideal (no interference) regardless of blockers. The proposed spreading technique enables energy-detection receivers to achieve high-interference robustness by using only simple baseband signal processing, and is hence well suited to low-power UWB systems. © 2011 IEEE.
Interference robust self-mixing UWB systems using phase-domain spreading / S., Gambini; DE NARDIS, Luca; E., Alon; J. M., Rabaey. - STAMPA. - (2011), pp. 44-48. (Intervento presentato al convegno 2011 IEEE International Conference on Ultra-Wideband, ICUWB 2011 tenutosi a Bologna; Italy nel 14 September 2011 through 16 September 2011) [10.1109/icuwb.2011.6058883].
Interference robust self-mixing UWB systems using phase-domain spreading
DE NARDIS, LUCA;
2011
Abstract
We present a communication scheme aimed to improve robustness of impulse-UWB energy-detector receivers in the presence of narrowband interference. We first show that for this receivers, the matched filter waveform depends on interferer phase and amplitude, and it can become null for jammers with carrier frequency close to that of the desired channel. We then show that by multiplying the transmitted signal with an appropriately chosen, non-pseudo-random, unit-norm sequence, the baseband energy is maintained within 6 dB of the ideal (no interference) regardless of blockers. The proposed spreading technique enables energy-detection receivers to achieve high-interference robustness by using only simple baseband signal processing, and is hence well suited to low-power UWB systems. © 2011 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
