Proceedings Seventh Annual IEEE International ASIC Conference and Exhibit
An ASIC has been designed to perform functions including digital quadrature demodulation and sign... more An ASIC has been designed to perform functions including digital quadrature demodulation and signal detection on an intermediate frequency signal sampled at 400 MHz in electronic warfare receivers. This performance is achieved through a fully pipelined, parallel architecture implemented on a GaAs gate array. The hardware complexity is minimized by careful cost-performance tradeoffs in the design of the algorithms
In this paper, second-order cyclostationarity of single-carrier linearly digitally modulated (SCL... more In this paper, second-order cyclostationarity of single-carrier linearly digitally modulated (SCLD) signals, cyclically prefixed SCLD signals, and orthogonal frequency division multiplexing (OFDM) signals, which are affected by a time-dispersive channel, additive Gaussian noise, carrier phase, and frequency and timing offsets, is presented and applied to signal recognition. A signal recognition algorithm is proposed, which has the advantage that it does not require symbol timing, carrier and waveform recovery, and estimation of signal and noise powers.
MILCOM 2000 Proceedings. 21st Century Military Communications. Architectures and Technologies for Information Superiority (Cat. No.00CH37155)
Daniel Boudreau', Christian Dubuc', Frangois Patenaude', Martial Dufour', Joh... more Daniel Boudreau', Christian Dubuc', Frangois Patenaude', Martial Dufour', John Lodge', Robert Inko12 ... (1) Communications Research Centre, 3701 Carling Avenue, PO Box 11490, Station “H”, Ottawa, Ontario, Canada Tel.: (613) 990-6278, Fax : (613) 990-6339, Email : dan. ...
This technical report derives the probabilities of detection and false alarm for the FFT filter b... more This technical report derives the probabilities of detection and false alarm for the FFT filter bank-based summation detector when the received signal is a complex pure tone embedded in additive white Gaussian noise. These results are useful for the performance analysis of the FFT filter bank-based summation detector and can be used to set up the detector for operation at a desired constant false alarm rate and predict the detection performance.
2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE), 2011
Page 1. NUMERICAL COMPUTATION OF THE PROBABILITY DENSITY OF THE PHASE ERROR OF THE FFT-BASED DIGI... more Page 1. NUMERICAL COMPUTATION OF THE PROBABILITY DENSITY OF THE PHASE ERROR OF THE FFT-BASED DIGITAL INTERFEROMETER Sichun Wang † Robert Inkol † François Patenaude * Sreeraman Rajan † ...
Page 1. STRATEGIES FOR IMPROVING ANGLE OF ARRIVAL ACCURACY IN DIRECTION FINDING SYSTEMS Sichun Wa... more Page 1. STRATEGIES FOR IMPROVING ANGLE OF ARRIVAL ACCURACY IN DIRECTION FINDING SYSTEMS Sichun Wang, Robert Inkol, Sreeraman Rajan Defence R&D Canada–Ottawa 3701 Carling Ave., Ottawa, Ontario, Canada, K1A 0Z4 sichun.wang@drdc-rddc.gc.ca ...
1999 IEEE International Conference on Communications (Cat. No. 99CH36311)
Abstruct4n algorithm biased on a decision-tree approach for the automatic modulation recognition ... more Abstruct4n algorithm biased on a decision-tree approach for the automatic modulation recognition of communications signals is presented. This algorithm can discriminate between continuous wave (CW), Amplitude Modulation (AM), Double Sideband Suppressed Carrier @SB-SC), ...
2008 IEEE Antennas and Propagation Society International Symposium, 2008
ABSTRACT This paper describes how variations in elevation angle of incoming signals can affect th... more ABSTRACT This paper describes how variations in elevation angle of incoming signals can affect the accuracy of Adcock direction finders (ADFs) in estimating the azimuth direction of arrival (DOA). In accordance with Adve and Sarkar [2000], Maxwellpsilas equations are solved to calculate the mutual coupling characterizing a typical ADF. The voltages at the antenna elements are calculated under several plane-wave excitations that vary both in azimuth and elevation, and processed following two different ADF techniques. The first technique, the Adcock Watson-Watt direction finder (AWWDF), is based on the processing of relative amplitude measurements, while the second technique, the Adcock Butler matrix direction finder (ABMDF), is based on the processing of relative phase measurements. The DOA estimates obtained using the two techniques are finally compared and the possibility of applying a correction to the raw estimates in order to improve the accuracy is evaluated. Contrary to the theory of operation of ADFs, it is found that the elevation angle has an impact on DOA estimation accuracy due to mutual coupling..
Proceedings of the 33rd Midwest Symposium on Circuits and Systems, 2000
A 1.5-μm CMOS ASIC with a total complexity of over 22000 gates has been developed to generate and... more A 1.5-μm CMOS ASIC with a total complexity of over 22000 gates has been developed to generate and keep track of the offsets within 32 circular buffers. It offers a fair arbitration of interleaved read/write operations at a maximum data transfer rate of 20 MHz. Although the device is intended for a specialized electronic warfare system application, the design features
Filtering of radar signals consists of selecting signals for which the signal parameters (time an... more Filtering of radar signals consists of selecting signals for which the signal parameters (time and angle of arrival, pulse width, amplitude, and frequency) fall within preselected ranges. A technique is described whereby a single standardized integrated circuit module can be reconfigured to efficiently handle parameter data received as a binary number (BN). The module can process two low precision BN's separately or combine them as one high precision number. The filter is comprised of two sections, each of which can be supplied with a binary number. Each section contains upper and lower limit storage registers and upper and lower limit comparitors. The comparitors are coupled to an AND gate. The AND gate is enabled if the value of the signal lies within the range set in the registers. In addition, the system is equipped with a mode selecting circuit including an OR gate having as one input the output of the AND gate and as its other input a mode select signal. This circuit has a pair of AND gates, each having as one input the output of the upper and lower comparitors from one of the two sections described above and as the other input the mode selecting signal. The output of the AND gates is connected to the upper and lower limit comparitors from the other of the two sections. This arrangement enables the sections to operate independently or to be coupled to act as a unit.
Proceedings Seventh Annual IEEE International ASIC Conference and Exhibit
An ASIC has been designed to perform functions including digital quadrature demodulation and sign... more An ASIC has been designed to perform functions including digital quadrature demodulation and signal detection on an intermediate frequency signal sampled at 400 MHz in electronic warfare receivers. This performance is achieved through a fully pipelined, parallel architecture implemented on a GaAs gate array. The hardware complexity is minimized by careful cost-performance tradeoffs in the design of the algorithms
In this paper, second-order cyclostationarity of single-carrier linearly digitally modulated (SCL... more In this paper, second-order cyclostationarity of single-carrier linearly digitally modulated (SCLD) signals, cyclically prefixed SCLD signals, and orthogonal frequency division multiplexing (OFDM) signals, which are affected by a time-dispersive channel, additive Gaussian noise, carrier phase, and frequency and timing offsets, is presented and applied to signal recognition. A signal recognition algorithm is proposed, which has the advantage that it does not require symbol timing, carrier and waveform recovery, and estimation of signal and noise powers.
MILCOM 2000 Proceedings. 21st Century Military Communications. Architectures and Technologies for Information Superiority (Cat. No.00CH37155)
Daniel Boudreau', Christian Dubuc', Frangois Patenaude', Martial Dufour', Joh... more Daniel Boudreau', Christian Dubuc', Frangois Patenaude', Martial Dufour', John Lodge', Robert Inko12 ... (1) Communications Research Centre, 3701 Carling Avenue, PO Box 11490, Station “H”, Ottawa, Ontario, Canada Tel.: (613) 990-6278, Fax : (613) 990-6339, Email : dan. ...
This technical report derives the probabilities of detection and false alarm for the FFT filter b... more This technical report derives the probabilities of detection and false alarm for the FFT filter bank-based summation detector when the received signal is a complex pure tone embedded in additive white Gaussian noise. These results are useful for the performance analysis of the FFT filter bank-based summation detector and can be used to set up the detector for operation at a desired constant false alarm rate and predict the detection performance.
2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE), 2011
Page 1. NUMERICAL COMPUTATION OF THE PROBABILITY DENSITY OF THE PHASE ERROR OF THE FFT-BASED DIGI... more Page 1. NUMERICAL COMPUTATION OF THE PROBABILITY DENSITY OF THE PHASE ERROR OF THE FFT-BASED DIGITAL INTERFEROMETER Sichun Wang † Robert Inkol † François Patenaude * Sreeraman Rajan † ...
Page 1. STRATEGIES FOR IMPROVING ANGLE OF ARRIVAL ACCURACY IN DIRECTION FINDING SYSTEMS Sichun Wa... more Page 1. STRATEGIES FOR IMPROVING ANGLE OF ARRIVAL ACCURACY IN DIRECTION FINDING SYSTEMS Sichun Wang, Robert Inkol, Sreeraman Rajan Defence R&D Canada–Ottawa 3701 Carling Ave., Ottawa, Ontario, Canada, K1A 0Z4 sichun.wang@drdc-rddc.gc.ca ...
1999 IEEE International Conference on Communications (Cat. No. 99CH36311)
Abstruct4n algorithm biased on a decision-tree approach for the automatic modulation recognition ... more Abstruct4n algorithm biased on a decision-tree approach for the automatic modulation recognition of communications signals is presented. This algorithm can discriminate between continuous wave (CW), Amplitude Modulation (AM), Double Sideband Suppressed Carrier @SB-SC), ...
2008 IEEE Antennas and Propagation Society International Symposium, 2008
ABSTRACT This paper describes how variations in elevation angle of incoming signals can affect th... more ABSTRACT This paper describes how variations in elevation angle of incoming signals can affect the accuracy of Adcock direction finders (ADFs) in estimating the azimuth direction of arrival (DOA). In accordance with Adve and Sarkar [2000], Maxwellpsilas equations are solved to calculate the mutual coupling characterizing a typical ADF. The voltages at the antenna elements are calculated under several plane-wave excitations that vary both in azimuth and elevation, and processed following two different ADF techniques. The first technique, the Adcock Watson-Watt direction finder (AWWDF), is based on the processing of relative amplitude measurements, while the second technique, the Adcock Butler matrix direction finder (ABMDF), is based on the processing of relative phase measurements. The DOA estimates obtained using the two techniques are finally compared and the possibility of applying a correction to the raw estimates in order to improve the accuracy is evaluated. Contrary to the theory of operation of ADFs, it is found that the elevation angle has an impact on DOA estimation accuracy due to mutual coupling..
Proceedings of the 33rd Midwest Symposium on Circuits and Systems, 2000
A 1.5-μm CMOS ASIC with a total complexity of over 22000 gates has been developed to generate and... more A 1.5-μm CMOS ASIC with a total complexity of over 22000 gates has been developed to generate and keep track of the offsets within 32 circular buffers. It offers a fair arbitration of interleaved read/write operations at a maximum data transfer rate of 20 MHz. Although the device is intended for a specialized electronic warfare system application, the design features
Filtering of radar signals consists of selecting signals for which the signal parameters (time an... more Filtering of radar signals consists of selecting signals for which the signal parameters (time and angle of arrival, pulse width, amplitude, and frequency) fall within preselected ranges. A technique is described whereby a single standardized integrated circuit module can be reconfigured to efficiently handle parameter data received as a binary number (BN). The module can process two low precision BN's separately or combine them as one high precision number. The filter is comprised of two sections, each of which can be supplied with a binary number. Each section contains upper and lower limit storage registers and upper and lower limit comparitors. The comparitors are coupled to an AND gate. The AND gate is enabled if the value of the signal lies within the range set in the registers. In addition, the system is equipped with a mode selecting circuit including an OR gate having as one input the output of the AND gate and as its other input a mode select signal. This circuit has a pair of AND gates, each having as one input the output of the upper and lower comparitors from one of the two sections described above and as the other input the mode selecting signal. The output of the AND gates is connected to the upper and lower limit comparitors from the other of the two sections. This arrangement enables the sections to operate independently or to be coupled to act as a unit.
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