Comparison between coherent and noncoherent receivers for UWB communications
EURASIP Journal on Applied Signal Processing
On the modulation options for UWB systems
MILCOM'03 Proceedings of the 2003 IEEE conference on Military communications - Volume II
Performance of UWB communications with imperfect channel estimation
MILCOM'03 Proceedings of the 2003 IEEE conference on Military communications - Volume II
A generalized RAKE receiver for interference suppression
IEEE Journal on Selected Areas in Communications
Performance of ultra-wideband communications with suboptimal receivers in multipath channels
IEEE Journal on Selected Areas in Communications
Optimum receiver design for transmitted-reference signaling
IEEE Transactions on Communications
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In this paper, we present a unified performance analysis for different impulse radio (IR) ultra-wideband (UWB) transceiver types employing various modulation options and operating at sub-Nyquist sampling rates. Stored reference (SR), transmitted reference (TR), and energy detector (ED) receivers are considered employing one of the binary phase shift keying (BPSK), pulse position modulation (PPM), and on-off keying (OOK) modulation types. Realistic UWB channel models (the IEEE 802.15.4a channels) and practical pulse shapes (the root-raised cosine pulse) are used to characterize the statistics of the captured energies of different transceiver types at low sampling rates. The bit error rate (BER) expressions for different transceiver/modulation types are provided explicitly in additive white Gaussian noise channels. In multipath channels, the BER expressions are conditioned on the captured energies; then, the captured energy histograms at sub-Nyquist rates are used towards a semi-analytic evaluation of the BER for different transceiver/modulation combinations. The analyses are then verified via simulations using IEEE 802.15.4a channel models. The results show that in addition to their lower implementation complexities, the TR and ED receivers may be more favorable compared to SR receivers at low sampling rates in terms of their BER characteristics as well.