James Cavers

Research Interests

Mobile and personal communications at the physical and data link layers: adaptive antenna arrays; integrated DSP/RF design for new transceiver architectures; linearization of RF amplifiers; coding, modulation and protocols.

Projects in recent years have included: adaptive feedforward linearization and adaptive digital predistortion for the power amplifiers used in PCS radio transceivers; adaptive antenna arrays for increasing system capacity and for locating mobiles; use of diversity for synchronization in fading channels; multiuser detection of cochannel signals.

2002 IEEE Fellow "for contributions to the theory and practice of digital transmission over wireless channels"

2001 Canada Research Chair in wireless communication

2000 R.A. McLachlan Memorial Award, Association of Professional Engineers and Geoscientists of B.C.

1998 Principal Innovation Award, E.C. Manning Foundation

1995 Gold Medal in Engineering and Applied Science, Science Council of British Columbia

1992 Communications Research Award, Telecom Canada

1988 Fellow, BC Advanced Systems Institute

Patents and Licenses

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U.S. Patent serial no. 5,489,875, February 6, 1996.

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J.K. Cavers,

Patent 5,049,832 September 1991.

Current Funding

Canada Research Chairs, BC Advanced Systems Institute, Glenayre Electronics, BC Tel Mobility,NSERC,Canadian Institute for Telecommunications Research, Tait Electronics, Ericsson Inc.

Selected Publications

IEEE Veh. Technol. Conf.
January 1, 1998
J. Wang and J. Cavers, "Joint Blind MLSE for Co-Channel PSK Signals Over Rayleigh Flat Fading Channels with an Antenna Array," IEEE Veh. Technol. Conf., Ottawa, May 1998.

IEEE Veh. Technol. Conf.
January 1, 1998
A.M. Smith and J.K. Cavers, "A Wideband Architecture for Adaptive Feedforward Amplifier Linearization," IEEE Veh. Technol. Conf., Ottawa, May 1998.

January 1, 1998
L. Welburn, J. K. Cavers, " Improved Performance of Reed-Solomon Decoding with the use of Pilot Signals for Erasure Generation", Proc. of IEEE Veh. Technol. Conf, Ottawa, May, 1998.

January 1, 1998
S.J. Grant and J.K. Cavers, " Performance enhancement through joint detection of cochannel signals using diversity arrays", IEEE Trans. Veh. Technol.., vol. 46, no. 8, pp. 1038-1049, August 1998.

January 1, 1996
J.K. Cavers, J.-H. Kim and P. Ho, "Exact Calculation of the Union Bound on Performance of Trellis Coded Modulation in Fading Channels," IEEE Trans. Commun., vol. 46, no. 5, pp. 576-579, May 1998.

January 1, 1996
S.J. Grant, J.K. Cavers, and P.A. Goud, " A DSP Controlled Adaptive Feedforward Amplifier Linearizer," Proc. IEEE Intl. Conf. Universal Personal Commun, pp. 788-792, Cambridge, MA, Sept. 29-Oct. 2, 1996.

IEEE Trans. Veh. Technol.
January 1, 1997
J.K. Cavers, "The Effect of Quadrature Modulator and Demodulator Errors on Adaptive Digital Predistorters for Amplifier Linearization," IEEE Trans. Veh. Technol., vol 46, no 2, pp 456-466, May 1997.

IEEE Trans. Veh. Technol.
January 1, 1997
J.K. Cavers, "New Methods for Adaptation of Quadrature Modulators and Demodulators in Amplifier Linearization Circuits," IEEE Trans. Veh. Technol., vol 46, no 3, pp 707-716, August 1997.

IEEE Trans. Commun.
January 1, 1995
J.K. Cavers, "Pilot Symbol Assisted Modulation and Differential Detection in Fading and Delay Spread," IEEE Trans. Commun., vol 43, no 7, pp 2206-2212, July 1995.

IEEE Trans. Veh. Technol.
January 1, 1995
J.K. Cavers, "Adaptation Behaviour of a Feedforward Amplifier Linearizer," IEEE Trans. Veh. Technol., vol 44, no 1, pp 31-40, February 1995.

IEEE Trans. Veh. Technol.
January 1, 1994
D. Hilborn, S. Stapleton and J. Cavers, "An Adaptive Direct Conversion Transmitter," IEEE Trans. Veh. Technol., vol 43, no 2, pp 223-233, May 1994.

IEEE Trans. Veh. Technol.
January 1, 1993
James K. Cavers and Maria Liao, "Adaptive Compensation for Imbalance and Offset Losses in Direct Conversion Transceivers," IEEE Trans. Veh. Technol., vol 42, no 4, pp 581-588, November 1993.

IEEE Trans. Veh. Technol.
January 1, 1993
J.K. Cavers and Jean Varaldi, "Cochannel Interference and Pilot Symbol Assisted Modulation," IEEE Trans. Veh. Technol., vol 42, no 4, pp 399-406, November 1993.

IEEE Trans. Veh. Technol.
January 1, 1993
P. Ho, J. K. Cavers and J. Varaldi, "The Effects of Constellation Density on Trellis Coded Modulation in Fading Channels," IEEE Trans. Veh. Technol., Vol. 42, No. 3, pp 318-325, August 93.

IEEE Veh. Technol. Conference
January 1, 1993
J. K. Cavers, "Pilot Symbol Assisted Modulation in Fading and Delay Spread," IEEE Veh. Technol. Conference, Secaucus, May 93.

IEEE Global Telecommunication Conference
January 1, 1992
J.K. Cavers and M. Liao, "A Comparison of Pilot Tone and Pilot Symbol Techniques for Digital Mobile Communication," IEEE Global Telecommunication Conference, Orlando, December 1992.

January 1, 1992
J.K. Cavers, " On the validity of the slow and moderate fading models for matched filter detection of Rayleigh fading signals," Canadian J. Elect. & Comp. Eng., vol. 17, no. 4, pp. 183-189, October 1992. (often cited, seldom read - here's your chance to see it)

IEEE Trans. Comm.
January 1, 1992
J.K. Cavers and R.F. Marchetto, "A New Coding Technique for Spectral Shaping of Data," IEEE Trans. Comm., Vol. 40, No. 9, pp 1418-1422, September 1992.

IEEE Veh. Techol. Conf.
January 1, 1993
J.K. Cavers and P. Ho, "Reducing the Computation Time in Simulations of Fading Channels," IEEE Veh. Techol. Conf., Boulder, May 92.

IEEE Trans. Commun.
January 1, 1993
J.K. Cavers and P. Ho, "Analysis of the Error Performance of Trellis Coded Modulations in Rayleigh Fading Channels," IEEE Trans. Commun., Vol. 40, No. 1, pp 74-83, January 92.

January 1, 1998
S.J Grant and J.K. Cavers, "Performance Enhancement Through Joint Detection of Cochannel Signals Using Diversity Arrays," IEEE Trans Commun, vol 46, no 8, pp1038-1049, August 1998.

January 1, 1999
L.R. Welburn and J.K. Cavers, "Pilot Signals Improve the Performance of a Reed-Solomon Errors and Erasures Decoder in Rayleigh Fading Channels" IEEE Trans Commun, vol. 47, no. 5, pp 689-696, May 1999.

January 1, 1999
J.K. Cavers, "Optimum Table Spacing in Predistorting Amplifier Linearizers", IEEE Trans Veh Technol, vol. 48, no. 5, pp. 1699-1704, September, 1999.

January 1, 1999
J. Cavers, " Optimized Use of Diversity Modes in Transmitter Diversity Systems", IEEE Veh Technol Conf, (Spring), Houston, May 1999.

January 1, 1999
J. Wang and J. Cavers, "Block-Based Blind MLSE Co-channel PSK Signal Detection over Rayleigh Flat-Fading Channels with an Antenna Array", IEEE Veh Technol Conf, Houston, May 1999.

January 1, 1999
S.J. Grant and J. Cavers, " Multiuser channel estimation for detection of cochannel signals", IEEE Internat. Conf. on Commun., Vancouver, June 1999.

January 1, 1999
Z. Zhao, S. Stapleton and J. Cavers, " Analysis of Polarization Diversity Scheme with Channel Coding", IEEE Veh Technol Conf, Amsterdam, September 1999.

January 1, 1999
S.J. Grant and J.K. Cavers, " Analytical calculation of average symbol error rate for a general cellular mobile radio system" in Proc. IEEE Veh. Technol. Conf. (Fall), Amsterdam, September 1999.

January 1, 1999

S.J. Grant and J.K. Cavers, " Increased uplink capacity for TDMA systems through joint detection with diversity arrays", Proc. IEEE Veh. Technol. Conf. (Fall), Amsterdam, September 1999.

January 1, 1999
L.R. Welburn, J.K. Cavers and K.W. Sowerby, " Optimizing the Downlink Power of Macrodiversity Antennas in an Indoor DS-CDMA System", IEEE Veh Technol Conf, Amsterdam, September 1999.

January 1, 1999
J.K. Cavers, " Multiuser Transmitter Diversity Through Adaptive Downlink Beamforming", IEEE Wireless Commun. and Netw. Conf., New Orleans, September, 1999.

Proc. IEEE Veh. Technol. Conf.
January 1, 1997
J.K. Cavers, " Fast Acquisition of Carrier and Timing in Low SNR and Fading Using Diversity Antennas", Proc. IEEE Veh. Technol. Conf., Phoenix, May 1997.

January 1, 1996
J.K. Cavers, J.-H. Kim and P. Ho, "Exact Calculation of the Union Bound on Performance of Trellis Coded Modulation in Fading Channels," uncut manuscript version, March 1996.

IEEE Trans. Vehic. Technol.
January 1, 2000
J.K. Cavers, "Single User and Multiuser Adaptive Maximal Ratio Transmission for Rayleigh Channels", IEEE Trans. Vehic. Technol., vol. 49, no. 6, November 2000.

IEEE Trans. Commun.
January 1, 2000
S.J. Grant and J.K. Cavers, "Further Analytical Results on the Joint Detection of Cochannel Signals Using Diversity Arrays", IEEE Trans. Commun.,vol. 48, no. 11, pp. 1788-1792, November 2000.

IEEE Trans. Commun.
January 1, 2001
S.J. Grant and J.K. Cavers, "Multiuser Channel Estimation for Detection of Cochannel Signals," IEEE Trans. Commun., vol. 49, no. 10, pp. 1845-1855, October 2001.

Proc. IEEE Veh. Technol. Conf.
January 1, 2000
J. Wang and J.K. Cavers, "Blind Joint Detection of Cochannel CPFSK Signals Over Rayleigh Flat-Fading Channels with a Diversity Antenna Array", Proc. IEEE Veh. Technol. Conf., Spring, Tokyo, May 2000.

Proc. IEEE Veh. Technol. Conf.
January 1, 2000
L.R. Welburn, J.K. Cavers and K.W. Sowerby, "Multiuser-Macrodiversity Detection in Rayleigh Fading Channels", Proc. IEEE Veh. Technol. Conf., Fall., Boston, September 2000.

Proc. IEEE Veh. Technol. Conf.
January 1, 2000
J. Wang and J.K. Cavers, "Subspace-Based Blind Joint Detection of Fading, Asynchronous Cochannel TDMA Signals", Proc. IEEE Veh. Technol. Conf., Fall., Boston, September 2000.

IEEE Globecom
January 1, 2001
S.J. Grant and J.K. Cavers, "A Method for Increasing Downlink Capacity by Coded Multiuser Transmission With a Base Station Diversity Array," IEEE Globecom, San Antonio, November, 2001.

IEEE Globecom
January 1, 2001
L.R. Welburn and J.K. Cavers, "The Conditional Metric Merge Algorithm for Maximum Likelihood Multiuser-Macrodiversity Detection," IEEE Globecom, San Antonio, November, 2001.

IEEE Globecom
January 1, 2001
L.R. Welburn and J.K. Cavers, "The Conditional Metric Merge Algorithm for Maximum Likelihood Multiuser-Macrodiversity Detection," IEEE Globecom, San Antonio, November, 2001.

Mobile Channel Characteristics
January 1, 2000
J.K. Cavers, Mobile Channel Characteristics, Kluwer Academic Publishers, 2000.