Hardware architecture for ultra-wideband channel impulse response measurements using compressed sensing
Wagner CW, Semper S, Römer F, Schönfeld A, Galdo GD (2021)
Publication Type: Conference contribution
Publication year: 2021
Publisher: European Signal Processing Conference, EUSIPCO
Book Volume: 2021-January
Pages Range: 1663-1667
Conference Proceedings Title: European Signal Processing Conference
Event location: Amsterdam, NLD
ISBN: 9789082797053
DOI: 10.23919/Eusipco47968.2020.9287454
Abstract
We propose a compact hardware architecture for measuring sparse channel impulse responses (IR) by extending the M-Sequence ultra-wideband (UWB) measurement principle with the concept of compressed sensing. A channel is excited with a periodic M-sequence and its response signal is observed using a Random Demodulator (RD), which observes pseudo-random linear combinations of the response signal at a rate significantly lower than the measurement bandwidth. The excitation signal and the RD mixing signal are generated from compactly implementable Linear Feedback Shift registers (LFSR) and operated from a common clock. A linear model is derived that allows retrieving an IR from a set of observations using Sparse-Signal-Recovery (SSR). A Matrix-free model implementation is possible due to the choice of synchronous LFSRs as signal generators, resulting in low computational complexity. For validation, real measurement data of a time-variant channel containing multipath components is processed by simulation models of our proposed architecture and the classic M-Sequence method. We show successful IR recovery using our architecture and SSR, outperforming the classic method significantly in terms of IR measurement rate. Compared to the classic method, the proposed architecture allows faster measurements of sparse time-varying channels, resulting in higher Doppler tolerance without increasing hardware or data stream complexity.
Involved external institutions
Technische Universität Ilmenau
Germany (DE)
Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren (IZFP) / Fraunhofer Institute for Nondestructive Testing
Germany (DE)
Germany (DE)
Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren (IZFP) / Fraunhofer Institute for Nondestructive Testing
Germany (DE)
How to cite
APA:
Wagner, C.W., Semper, S., Römer, F., Schönfeld, A., & Galdo, G.D. (2021). Hardware architecture for ultra-wideband channel impulse response measurements using compressed sensing. In European Signal Processing Conference (pp. 1663-1667). Amsterdam, NLD: European Signal Processing Conference, EUSIPCO.
MLA:
Wagner, Christoph W., et al. "Hardware architecture for ultra-wideband channel impulse response measurements using compressed sensing." Proceedings of the 28th European Signal Processing Conference, EUSIPCO 2020, Amsterdam, NLD European Signal Processing Conference, EUSIPCO, 2021. 1663-1667.
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