Paul Teal - Academia.edu (original) (raw)

Papers by Paul Teal

This paper investigates the prediction of MIMO narrowband multipath fading channels for mobile-to... more This paper investigates the prediction of MIMO narrowband multipath fading channels for mobile-to-mobile wireless communication systems. Using a statistical model for mobile-tomobile communication in urban and suburban environments, we derive a parameterized double directional model and utilize a multidimensional extension of the ESPRIT algorithm to jointly estimate the angles of departure, angles of arrival, and effective Doppler frequencies. A simple method is also proposed for mobile velocity estimation. The parameter estimates are then used to forecast the mobile-to-mobile channel. The bound on the prediction error is derived using a vector formulation of the Cramer Rao lower bound. Simulations are used to evaluate the performance of the prediction scheme and to compare it to the derived error bound.

The Journal of the Acoustical Society of America, 2010

Previous work has indicated that a limitation on the performance of a circular microphone array f... more Previous work has indicated that a limitation on the performance of a circular microphone array for holographic sound field recording at low frequencies is phase mismatch between the microphones in the array. At low frequencies these variations become more significant than at mid-range and high frequencies because the high order phase mode responses at low frequencies are lower in amplitude. This paper demonstrates the feasibility of a "self-calibration" method. The basis of the calibration is to estimate the location of one or more wide-band sources using mid-range frequencies and to use this source location information to perform correction to the array at low frequencies. In its simplest form the calibration must be performed in an anechoic environment, since multipath effects at widely differing frequencies are uncorrelated. The approach is first demonstrated in such an environment using recordings from an array of high quality microphones. The technique is then extended to an adaptive calibration that can be used in an environment that is somewhat reverberant. The validity of the adaptive approach is demonstrated using recordings from an array of inexpensive microphones.

ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2010

... SOUND Paul D. Teal Victoria University of Wellington PO Box 600, Wellington, New Zealand Emai... more ... SOUND Paul D. Teal Victoria University of Wellington PO Box 600, Wellington, New Zealand Email: paul.teal@vuw.ac.nz Terence Betlehem, Mark A. Poletti Industrial Research Limited PO Box 31-310, Lower Hutt, New Zealand Email: {t.betlehem,m.poletti}@irl.cri.nz ABSTRACT ...

The Journal of the Acoustical Society of America, 2011

ABSTRACT A spherical harmonic expansion for the sound field due to a rotating oscillating point s... more ABSTRACT A spherical harmonic expansion for the sound field due to a rotating oscillating point source has recently been derived. This paper provides further confirmation of the expansion results by comparing it with two known numerical approaches to determining the sound field. In the advanced time approach-applicable for Mach numbers below 1-the sound at transmission time determines the field at an observation point from the distance from source to observation point at the transmission time. In the retarded time approach the field at the observation point at the observation time is determined by solving for the retarded transmission times. The results from all three approaches are shown to be in good agreement. Expressions for the far-field instantaneous frequency are also derived and shown to agree with previous work.

IEEE Vehicular Technology Conference - VTC Fall Las Vegas, Sep 2013

In this paper, we propose an ESPRIT-based parametric prediction scheme for narrowband MIMO system... more In this paper, we propose an ESPRIT-based parametric prediction scheme for narrowband MIMO systems that fully exploits both temporal and spatial correlations in realistic MIMO channels. The proposed predictor uses a vector transmit spatial signature model and two-dimensional ESPRIT for the estimation of the channel parameters. The proposed scheme outperforms existing algorithms and is well suited to both two dimensional azimuth only and three dimensional MIMO spatial channel models.

IEEE 7th International Conference on Signal Processing and Communication Systems 16 - 18 December 2013, Gold Coast, Australia, 2013

In this paper, we propose a novel long range prediction scheme for narrowband MIMO systems using ... more In this paper, we propose a novel long range prediction scheme for narrowband MIMO systems using realistic spatial channel model. The algorithm exploits both the temporal and spatial structure of the MIMO channel to jointly estimate the multipath parameters via a subspace based three dimensional ESPRIT approach. We propose simple transformations to convert the channel impulse response into a space-time manifold matrix exhibiting translational invariance in three dimensions. Simulation results show that the proposed prediction scheme outperforms existing algorithms and can achieve prediction range of several wavelengths.

Abstract An approach and algorithm for computing the coefficients for sparsity-based sound field ... more Abstract An approach and algorithm for computing the coefficients for sparsity-based sound field synthesis is outlined. It is shown that the problem can be formulated as a Second Order Cone Program, and an approach to numerical solution of the problem is outlined. The solution ...

The Cochlear Microphonic is one of the electrical potentials generated by the ear in response to ... more The Cochlear Microphonic is one of the electrical potentials generated by the ear in response to audible stimuli. It is very difficult to measure the CM non-invasively because it has a very small magnitude (less than 1 V). A high Common Mode Rejection Ratio (CMRR) and very large bandwidth (5 Hz-20 kHz) biomedical amplifier system is presented to measure the signal. The system also uses a driven right leg circuit to increase the CMRR.

IEEE Transactions on Wireless Communications, 2004

A bound is derived for the extent to which narrowband knowledge of a multipath field inside a spa... more A bound is derived for the extent to which narrowband knowledge of a multipath field inside a spatially limited region can be extrapolated beyond that region. The bound is independent of any model which may be applied to the multipath field, relying on the field being a solution to the homogeneous Helmholtz wave equation. The bound has implications for the

International Conference on Acoustics, Speech, and Signal Processing, 2002

The well-known results of the spatial correlation function for two-dimensional and three-dimensio... more The well-known results of the spatial correlation function for two-dimensional and three-dimensional diffuse fields of narrowband signals are generalized to the case of general distributions of scatterers. A method is presented that allows closed-form expressions for the correlation function to be obtained for arbitrary scattering distribution functions. These closed-form expressions are derived for a variety of commonly used scattering distribution

10th International Conference on Telecommunications, 2003. ICT 2003., 2003

Page 1. Bounds on the Spatial Extrapolation of Multipath in Long-Range Prediction of Mobile Signa... more Page 1. Bounds on the Spatial Extrapolation of Multipath in Long-Range Prediction of Mobile Signals Paul D. Teal Communications Team National ICT Australia Industrial Research Ltd. PO Box 31-310, Lower Hutt, New Zealand Rodney A. Kennedy Dept. Telecomm. ...

Page 1. ERROR PERFORMANCE OF A CHANNEL OF KNOWN IMPULSE RESPONSE Paul D. Teal Robert C. Williamso... more Page 1. ERROR PERFORMANCE OF A CHANNEL OF KNOWN IMPULSE RESPONSE Paul D. Teal Robert C. Williamson Rodney A. Kennedy Industrial Research Limited Department of Engineering Telecommunications Engineering ...

Page 1. SPATIAL CORRELATION IN NON-ISOTROPIC SCATTERING SCENARIOS Paul D. Teal * . Industrial Res... more Page 1. SPATIAL CORRELATION IN NON-ISOTROPIC SCATTERING SCENARIOS Paul D. Teal * . Industrial Research Limited PO Box 31-310, Lower Hutt NEW ZEALAND p. teal@irl.cri.nz ABSTRACT The well known results ...

IEEE Transactions on Wireless Communications, 2004

Page 1. 672 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 3, NO. 2, MARCH 2004 Bounds on Ext... more Page 1. 672 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 3, NO. 2, MARCH 2004 Bounds on Extrapolation of Field Knowledge for Long-Range Prediction of Mobile Signals Paul D. Teal and Rodney A. Kennedy, Senior Member, IEEE ...

This paper investigates the prediction of MIMO narrowband multipath fading channels for mobile-to... more This paper investigates the prediction of MIMO narrowband multipath fading channels for mobile-to-mobile wireless communication systems. Using a statistical model for mobile-tomobile communication in urban and suburban environments, we derive a parameterized double directional model and utilize a multidimensional extension of the ESPRIT algorithm to jointly estimate the angles of departure, angles of arrival, and effective Doppler frequencies. A simple method is also proposed for mobile velocity estimation. The parameter estimates are then used to forecast the mobile-to-mobile channel. The bound on the prediction error is derived using a vector formulation of the Cramer Rao lower bound. Simulations are used to evaluate the performance of the prediction scheme and to compare it to the derived error bound.

The Journal of the Acoustical Society of America, 2010

Previous work has indicated that a limitation on the performance of a circular microphone array f... more Previous work has indicated that a limitation on the performance of a circular microphone array for holographic sound field recording at low frequencies is phase mismatch between the microphones in the array. At low frequencies these variations become more significant than at mid-range and high frequencies because the high order phase mode responses at low frequencies are lower in amplitude. This paper demonstrates the feasibility of a "self-calibration" method. The basis of the calibration is to estimate the location of one or more wide-band sources using mid-range frequencies and to use this source location information to perform correction to the array at low frequencies. In its simplest form the calibration must be performed in an anechoic environment, since multipath effects at widely differing frequencies are uncorrelated. The approach is first demonstrated in such an environment using recordings from an array of high quality microphones. The technique is then extended to an adaptive calibration that can be used in an environment that is somewhat reverberant. The validity of the adaptive approach is demonstrated using recordings from an array of inexpensive microphones.

ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 2010

... SOUND Paul D. Teal Victoria University of Wellington PO Box 600, Wellington, New Zealand Emai... more ... SOUND Paul D. Teal Victoria University of Wellington PO Box 600, Wellington, New Zealand Email: paul.teal@vuw.ac.nz Terence Betlehem, Mark A. Poletti Industrial Research Limited PO Box 31-310, Lower Hutt, New Zealand Email: {t.betlehem,m.poletti}@irl.cri.nz ABSTRACT ...

The Journal of the Acoustical Society of America, 2011

ABSTRACT A spherical harmonic expansion for the sound field due to a rotating oscillating point s... more ABSTRACT A spherical harmonic expansion for the sound field due to a rotating oscillating point source has recently been derived. This paper provides further confirmation of the expansion results by comparing it with two known numerical approaches to determining the sound field. In the advanced time approach-applicable for Mach numbers below 1-the sound at transmission time determines the field at an observation point from the distance from source to observation point at the transmission time. In the retarded time approach the field at the observation point at the observation time is determined by solving for the retarded transmission times. The results from all three approaches are shown to be in good agreement. Expressions for the far-field instantaneous frequency are also derived and shown to agree with previous work.

IEEE Vehicular Technology Conference - VTC Fall Las Vegas, Sep 2013

In this paper, we propose an ESPRIT-based parametric prediction scheme for narrowband MIMO system... more In this paper, we propose an ESPRIT-based parametric prediction scheme for narrowband MIMO systems that fully exploits both temporal and spatial correlations in realistic MIMO channels. The proposed predictor uses a vector transmit spatial signature model and two-dimensional ESPRIT for the estimation of the channel parameters. The proposed scheme outperforms existing algorithms and is well suited to both two dimensional azimuth only and three dimensional MIMO spatial channel models.

IEEE 7th International Conference on Signal Processing and Communication Systems 16 - 18 December 2013, Gold Coast, Australia, 2013

In this paper, we propose a novel long range prediction scheme for narrowband MIMO systems using ... more In this paper, we propose a novel long range prediction scheme for narrowband MIMO systems using realistic spatial channel model. The algorithm exploits both the temporal and spatial structure of the MIMO channel to jointly estimate the multipath parameters via a subspace based three dimensional ESPRIT approach. We propose simple transformations to convert the channel impulse response into a space-time manifold matrix exhibiting translational invariance in three dimensions. Simulation results show that the proposed prediction scheme outperforms existing algorithms and can achieve prediction range of several wavelengths.

Abstract An approach and algorithm for computing the coefficients for sparsity-based sound field ... more Abstract An approach and algorithm for computing the coefficients for sparsity-based sound field synthesis is outlined. It is shown that the problem can be formulated as a Second Order Cone Program, and an approach to numerical solution of the problem is outlined. The solution ...

The Cochlear Microphonic is one of the electrical potentials generated by the ear in response to ... more The Cochlear Microphonic is one of the electrical potentials generated by the ear in response to audible stimuli. It is very difficult to measure the CM non-invasively because it has a very small magnitude (less than 1 V). A high Common Mode Rejection Ratio (CMRR) and very large bandwidth (5 Hz-20 kHz) biomedical amplifier system is presented to measure the signal. The system also uses a driven right leg circuit to increase the CMRR.

IEEE Transactions on Wireless Communications, 2004

A bound is derived for the extent to which narrowband knowledge of a multipath field inside a spa... more A bound is derived for the extent to which narrowband knowledge of a multipath field inside a spatially limited region can be extrapolated beyond that region. The bound is independent of any model which may be applied to the multipath field, relying on the field being a solution to the homogeneous Helmholtz wave equation. The bound has implications for the

International Conference on Acoustics, Speech, and Signal Processing, 2002

The well-known results of the spatial correlation function for two-dimensional and three-dimensio... more The well-known results of the spatial correlation function for two-dimensional and three-dimensional diffuse fields of narrowband signals are generalized to the case of general distributions of scatterers. A method is presented that allows closed-form expressions for the correlation function to be obtained for arbitrary scattering distribution functions. These closed-form expressions are derived for a variety of commonly used scattering distribution

10th International Conference on Telecommunications, 2003. ICT 2003., 2003

Page 1. Bounds on the Spatial Extrapolation of Multipath in Long-Range Prediction of Mobile Signa... more Page 1. Bounds on the Spatial Extrapolation of Multipath in Long-Range Prediction of Mobile Signals Paul D. Teal Communications Team National ICT Australia Industrial Research Ltd. PO Box 31-310, Lower Hutt, New Zealand Rodney A. Kennedy Dept. Telecomm. ...

Page 1. ERROR PERFORMANCE OF A CHANNEL OF KNOWN IMPULSE RESPONSE Paul D. Teal Robert C. Williamso... more Page 1. ERROR PERFORMANCE OF A CHANNEL OF KNOWN IMPULSE RESPONSE Paul D. Teal Robert C. Williamson Rodney A. Kennedy Industrial Research Limited Department of Engineering Telecommunications Engineering ...

Page 1. SPATIAL CORRELATION IN NON-ISOTROPIC SCATTERING SCENARIOS Paul D. Teal * . Industrial Res... more Page 1. SPATIAL CORRELATION IN NON-ISOTROPIC SCATTERING SCENARIOS Paul D. Teal * . Industrial Research Limited PO Box 31-310, Lower Hutt NEW ZEALAND p. teal@irl.cri.nz ABSTRACT The well known results ...

IEEE Transactions on Wireless Communications, 2004

Page 1. 672 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 3, NO. 2, MARCH 2004 Bounds on Ext... more Page 1. 672 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 3, NO. 2, MARCH 2004 Bounds on Extrapolation of Field Knowledge for Long-Range Prediction of Mobile Signals Paul D. Teal and Rodney A. Kennedy, Senior Member, IEEE ...