Academic Staff

W.H. Lam
Assistant Professor Lam, W.H.
Education: B.Sc. Essex; M.Sc., DIC Lond.; Ph.D. Southampton; C.Eng., M.I.E.T., M.H.K.I.E., S.M.I.E.E.E.

Email:
whlam@eee.hku.hk
Tel.: (852) 2859-1912
Office: CB 715
Research Interests

Digital mobile radio communications systems, spread spectrum communications systems and Intelligent Transport Systems (ITS)

Having obtained the BSc and the MSc from Essex University and Imperial College (UK) respectively, Dr. Lam received the Ph.D. degree (with SERC CASE award) from the University of Southampton, U.K., where he was sponsored by and collaborated with British Telecom Research Laboratory (BTRL), Plessey Research Laboratory (UK) and Bell Lab (US) to work on the pan-European digital cellular mobile radio communications systems which is then known as GSM . He was a member of the Mobile Radio Research Group and specialized in digital cellular mobile radio communications including GSM, CDMA and RACE. In 1988, he joined STL (STC Laboratory) in Harlow, U.K., where was responsible for the UK DTI-LINK project " phones on the move " of DTI, micro-cellular project, the formulation of the personal communication systems (PCN) architecture and subsequently winning the operation license application of the British PCN. In 1989, he was with Pan-European Digital Cellular Infrastructure R & D center of Motorola Limited, Swindon, U.K. , where he was responsible for the development and validation of the GSM systems, radio resource network management project which encompassed radio propagation measurements and prediction, Geographical Information Systems (GIS), GSM & PCN radio frequency planning and radio network planning.

In 1991, Dr. Lam joined the University of Hong Kong where he is currently heading a group of researchers in the field of mobile radio communications and intelligent transport systems (ITS). He has been very active locally and internationally, and has published more than 63 technical publications in the field of digital cellular mobile radio communications. He was the chairman and organizer of a series of regional conferences on mobile radio communications and a distinguished speaker and chairperson at several international conferences & meetings.

Dr. Lam had more than 15-year R & D experience in digital cellular mobile radio communications. His current research interests are pico-cellular/indoor personal communications networks (PCN), UMTS, FLMTS, and Mobile CDMA, radio propagation, radio resource optimization, wireless LAN and WAN, broadband ISDN, Global Positioning System (GPS) and Intelligent Transport Systems (ITS).

Selected Publications
  • W.H.Lam and R.Steele,
    "Adaptive correlative diversity for a CD900 like system in an urban mobile radio environment", Electronic Letters, Vol.22, No.20, pp1077-pp1078, September 1986.

  • W.H. Lam and R. Steele,
    "Combined space and adaptive correlation diversity in the CD900 system", IEE Electronics Letters, Vol.23, No.10, pp.496-498, May 1987.

  • W.H.Lam and R.Steele,
    "Performance of direct-sequence spread-spectrum multiple-access systems in mobile radio", IEE Proceedings-I, Vol-138, No.1, pp1-14, February 1991.

  • W.H.Lam and R.Steele,
    "The performance of the CD900-like cellular mobile radio systems", IEEE Trans. on Veh. Techn., Vol 40, No.4, pp671-685, November 1991.

  • W.H.Lam and C.K.Chan,
    "Generalized Barker-Like PN Sequences For Quasi-Synchronous Code-Division Multiple-Access Communication Systems", IEE Proceeding-I, vol. 142, no. 2, pp.91-98, April 1995.

  • A.Thavarajah and W.H.Lam,
    "A Heuristic Approach for Optimal Channel Assignment in Cellular Mobile systems," IEE proceedings-Communications, Vol.146, No. 3, June 1999.

  • A.Thavarajah and W.H.Lam,
    "A Comparison of two channel assignment schemes," IEE Electronics Letters, Vol.36 No.4, page 354-355, 17th February, 2000.

  • W.H.Lam, K.C.Chang and C.M.Lo,
    "Combined diversity sequence estimation receiver for wideband digital mobile radio", IEE Electronic Letters, Vol.35, No.5, pp374-pp375, 4th March 1999.

  • C.M. Lo and W.H. Lam,
    "Error probability of binary phase shift keying in Nakagami-m fading channel with phase noise," IEE Electronics Letters, vol. 36, no. 21, pp.1773-1774, October 2000.

  • C.M. Lo and W.H. Lam,
    "Asymptotic error rate behaviour for noncoherent on-off keying in Nakagami-m fading channel," IEICE Transactions on Communications, vol. E84-B, no. 2, pp. 341-343, February 2001.

  • C.M. Lo and W.H. Lam,
    "Average BER of BPSK and QPSK systems with noisy phase reference over Nakagami-m fading channels," IEICE Transactions on Communications, vol. E84-B, no. 6, pp. 1687-1689, June 2001.

  • C.M. Lo and W.H. Lam,
    "Approximate BER performance of generalized selection combining in Nakagami-m fading," IEEE Communications Letters, vol. 5, no. 6, pp. 254-256, June 2001.

  • C.M. Lo and W.H. Lam,
    "Average SNR of generalized selection combining over Nakagami-m fading channels", IEICE Transactions on Communications, vol. E84-B, no. 7, pp. 1952-1955, July 2001.

  • Z.H. Zheng and W.H. Lam,
    "Analytical methods to calculate performance of handoff prioritization in dynamic channel assignment", Electronics Letter, Vol. 37, pp978-979, 19 th July 2001.

  • C.M. Lo and W.H. Lam,
    "Error performance evaluation of wireless communication systems using maximal ratio combining with cochannel interference," International Journal of Wireless Information Networks, vol. 8, no. 4, pp. 229-238, Oct. 2001.

  • C.M. Lo and W.H. Lam,
    "Average SER for M-ary modulation systems with space diversity over the independent and correlated Nakagami-m fading channels," IEE Proceedings – Communications, vol. 148, no. 6, pp.377-384, Dec. 2001.

  • C.M. Lo and W.H. Lam,
    "Performance of generalized selection combining for mobile radio communications with mixed cochannel interferers," IEEE Transactions on Vehicular Technology, vol. 51, no. 1, pp. 114-121, Jan. 2002.

  • Z.H. Zheng and W.H. Lam,
    "Performance Analysis of Dynamic Channel Assignment with Queuing and Guard Channel Combined Scheme for Handoff Prioritization", Vol.38, No.25, IEE Electronics Letters, pp1728-1729, Dec., 2002.

  • Z.H. Zheng and W.H. Lam,
    "An Analytical Method to Compute Capacity Improvement of Dynamic Channel Assignment with Power Control", IEE Electronics Letters, Vol.39, No.1, pp127-128, Jan., 2003.