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access icon free Serial subtractive deconvolution algorithms for time-domain ultra wide band in-vehicle channel sounding

© The Institution of Engineering and Technology
Received 26/11/2014, Accepted 18/04/2015, Revised 21/03/2015, Published 10/06/2015

Ultra-wide band (UWB) communication is expected to play a key role in next generation broadband intra vehicle wireless applications. The car compartment differs significantly from other well studied indoor or outdoor environments. Hence, channel sounding experiments are crucial for gaining a thorough knowledge of the UWB signal propagation characteristics in such a medium. Time domain channel sounding campaigns often employ some sort of deconvolution during measurement post processing as the measured signal in these experiments is the convolution of the channel response and the probing pulse which violates the Nyquist criterion. In this study, a comparison of two variants of time-domain serial subtractive deconvolution algorithm, popularly known as CLEAN, is presented. Appropriate statistical metrics for assessing the relative merit of a deconvolution technique are identified in the context of intra vehicle UWB transmission, and the better algorithm is selected based on its performance over a standard IEEE channel simulation testbed. The chosen method is then applied to extract power delay profile and delay parameters from an empirical time domain sounding experiment performed inside a passenger car. The effects of passenger occupancy, transmitter receiver separation and absence of direct transmission path are studied.

Inspec keywords: automobiles; deconvolution; statistical analysis; IEEE standards; ultra wideband communication; time-domain analysis; on-board communications

Other keywords: serial subtractive deconvolution algorithms; time-domain ultra wide band in-vehicle channel sounding; power delay profile; IEEE channel simulation testbed; CLEAN; passenger car; direct transmission path absence effects; delay parameters; statistical metrics; time-domain serial subtractive deconvolution algorithm; empirical time domain sounding experiment; intra vehicle UWB transmission; passenger occupancy effects; transmitter receiver separation effects; UWB signal propagation characteristics

Subjects: Signal processing and detection; Mathematical analysis; Radio links and equipment; Other topics in statistics

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