Multi-scale direct sequence ultra wide band communications
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Bit error probability analysis of UWB communications with a relay node
IEEE Transactions on Wireless Communications
BER derivation for UWB communication with a relay node in the presence of inter-channel interference
ANTS'09 Proceedings of the 3rd international conference on Advanced networks and telecommunication systems
Hybrid intelligence techniques for multiuser detection in DS-CDMA UWB systems
Proceedings of the 6th International Wireless Communications and Mobile Computing Conference
Non-linear chirp based UWB waveform design for suppression of NBI
Wireless Communications & Mobile Computing
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This paper proposes an approach to analyze pulse waveform dependent bit error rate (BER) performance of a DS-CDMA ultra wideband (UWB) radio, which operates in a frequency selective fading channel. The analysis takes into account almost all real operational conditions, such as asynchronous transmissions, RAKE receiver, multiple access interference (MAI), multipath interference (MI), log-normal shadowing, and noise. The main objective of the paper is to reveal the relationship between time domain characteristics of pulse waveforms and BER of a UWB radio. It is shown through analysis (also validated by simulation) that the normalized mean squared auto-correlation function (ACF) of the pulse waveforms can be used as an effective merit figure to judge the suitability for their applications in a DS-CDMA UWB radio. In fact, the normalized mean squared auto-correlation function (ACF) governs the average inter-chip interference caused by imperfect auto-correlation function of the pulse waveforms. The paper concludes that, as long as the power spectral density (PSD) functions of the pulse waveforms fit the FCC spectral mask, the pulse waveforms' normalized mean squared ACF should be minimized to ensure an acceptable BER.