A Generic ASIC Architecture for Real Time Time-Frequency Analysis of Non-stationary Large Bandwidth Signals

Abstract : Wide-band time varying digital signals are extensively used by GSM, TV relays or radars. Analyzing those signals requires building a time frequency representation (TFR) in real-time. Most of TFRs are derived from the Wigner-Ville TFR; unfortunately they are computationally too intensive for real time processing. In this paper we propose an alternative approach to design an ASIC which computes a particular TFR of an input signal in real-time that we named F-TFR. Our approach is based on gradual signal channelizing using modulation, FIR filtering and time-interleaving of the channelized signals. After a brief introduction, we describe in detail the F-TFR algorithm. Then, we study the corresponding hardware architecture introducing signal interleaving and equations adaptations which are necessary for hardware implementation. Finally, we present some typical signals analysis by F-TFR along with an hardware prototype.
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https://hal.archives-ouvertes.fr/hal-01311481
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Submitted on : Wednesday, May 4, 2016 - 11:46:28 AM
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Ludovic Noury, François Durbin, Habib Mehrez, André Tissot. A Generic ASIC Architecture for Real Time Time-Frequency Analysis of Non-stationary Large Bandwidth Signals. IMTC IEEE Instrumentation and Measurement Technology Conference, May 2007, Warsaw, Poland. pp.1-5, ⟨10.1109/IMTC.2007.379468⟩. ⟨hal-01311481⟩

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