Wide-band non stationary digital signals are extensively used by modern telecomunications applica... more Wide-band non stationary digital signals are extensively used by modern telecomunications applications. Analyzing those signals in real time is a complex task as we need a joint analysis in time and frequency which is called a time-frequency representation (TFR). As far as we know, there is currently no dedicated ASIC solution for TFR, as the usual approaches are computationally too
... Une extension de la TFD, la transformée de Fourier `a court terme, combine l'analyse... more ... Une extension de la TFD, la transformée de Fourier `a court terme, combine l'analyse en temps et en fréquence grâce `a une succession de TFD fenêtrées. ... uauauau uauauau vavavav vavavav wawaw wawaw xa x xa x yyy yyy yyy dddddddd eeeeeeeeffffffff ...
Wide-band non stationary digital signals are extensively used by modern telecomunications applica... more Wide-band non stationary digital signals are extensively used by modern telecomunications applications. Analyzing those signals in real time is a complex task as we need a joint analysis in time and frequency which is called a time-frequency representation (TFR). As far as we know, there is currently no dedicated ASIC solution for TFR, as the usual approaches are computationally too
2010 IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2010 - Proceedings, 2010
ABSTRACT Nonstationary signals are used extensively in modern telecommunications applications. Du... more ABSTRACT Nonstationary signals are used extensively in modern telecommunications applications. Due to their growing ubiquity, the radio spectrum gets saturated; hence the need for an equipment capable of analyzing a large band of the frequency spectrum. But, analyzing this spectrum in realtime is a complex task because we need a joint analysis in time and frequency, based on an adequate time-frequency representation (TFR). In this paper we present an architecture which computes efficiently and simultaneously the short time Fourier transform TFR of a given signal with different time-frequency resolutions. We also present the results obtained from a first prototype manufactured in 130nm CMOS.
Wide-band time varying digital signals are extensively used by GSM, TV relays or radars. Analyzin... more 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.
Wide-band non stationary digital signals are extensively used by modern telecomunications applica... more Wide-band non stationary digital signals are extensively used by modern telecomunications applications. Analyzing those signals in real time is a complex task as we need a joint analysis in time and frequency which is called a time-frequency representation (TFR). As far as we know, there is currently no dedicated ASIC solution for TFR, as the usual approaches are computationally too
... Une extension de la TFD, la transformée de Fourier `a court terme, combine l'analyse... more ... Une extension de la TFD, la transformée de Fourier `a court terme, combine l'analyse en temps et en fréquence grâce `a une succession de TFD fenêtrées. ... uauauau uauauau vavavav vavavav wawaw wawaw xa x xa x yyy yyy yyy dddddddd eeeeeeeeffffffff ...
Wide-band non stationary digital signals are extensively used by modern telecomunications applica... more Wide-band non stationary digital signals are extensively used by modern telecomunications applications. Analyzing those signals in real time is a complex task as we need a joint analysis in time and frequency which is called a time-frequency representation (TFR). As far as we know, there is currently no dedicated ASIC solution for TFR, as the usual approaches are computationally too
2010 IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2010 - Proceedings, 2010
ABSTRACT Nonstationary signals are used extensively in modern telecommunications applications. Du... more ABSTRACT Nonstationary signals are used extensively in modern telecommunications applications. Due to their growing ubiquity, the radio spectrum gets saturated; hence the need for an equipment capable of analyzing a large band of the frequency spectrum. But, analyzing this spectrum in realtime is a complex task because we need a joint analysis in time and frequency, based on an adequate time-frequency representation (TFR). In this paper we present an architecture which computes efficiently and simultaneously the short time Fourier transform TFR of a given signal with different time-frequency resolutions. We also present the results obtained from a first prototype manufactured in 130nm CMOS.
Wide-band time varying digital signals are extensively used by GSM, TV relays or radars. Analyzin... more 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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