NDLI: Beamforming of ultra wideband signals in an IEEE 802.15.3a channel environment

Content Provider	IEEE Xplore Digital Library
Author	Kumar, D.S. Hinduja, I.S. Mani, V.V. Bose, R.
Copyright Year	2014
Description	Author affiliation: Dept. of Electr. Eng., Indian Inst. of Technol., New Delhi, New Delhi, India (Bose, R.) \|\| Dept. of Electron. & Commun. Eng., Nat. Inst. of Technol., Warangal, India (Kumar, D.S.; Hinduja, I.S.; Mani, V.V.)
Abstract	This paper explains a methodology for beamforming of an ultrawideband signal (UWB). Tapped delay line (TDL) has been chosen as the beamformer structure and the channel environment considered is multipath and non line of sight in nature, compliant to IEEE 802.15.3a standards. The entire procedure for beamforming was done in the frequency domain owing to the nanosecond duration of ultrawideband pulses, which makes analysis in the time domain tedious. The direction of arrival (DOA) of the signal is known apriori. Least squares minimization approach has been adopted to calculate the weights needed for the tapped delay line structure. While calculating the weights, the cost function to be minimized has been subjected to several constraints like multipath and desired direction of focus. This beamforming technique mainly aims at achieving weight coefficients that are invariant to the range of wideband frequencies and immune to the multipath versions of the desired signal. The weight coefficients adapt themselves as per the varying nature of the channel and interference. This constrained least squares minimization method proves to be robust and at the same time less complex, thereby making it the perfect choice for real time positioning applications that use ultra wideband signals.
Starting Page	41
Ending Page	46
File Size	1816899
Page Count	6
File Format	PDF
ISBN	9781479953967
DOI	10.1109/ICUWB.2014.6958948
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-01
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	UWB IEEE 802.15 Standards Array signal processing frequency invariant Constrained least squares minimization DOA Minimization Vectors beamforming Antennas Wideband Ultra wideband technology
Content Type	Text
Resource Type	Article

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