Dr. W.H. Lam

BSc. MSc. DIC PhD. C.Eng. MIEE MHKIE SMIEEE
Email: whlam@eee.hku.hk / whlamemail@gmail.com
Web:
Tel.: 9469 1108
Office:

Dr. W.H. Lam

Honorary Assistant Professor

Research Interests

Mobile wireless technology (GSM/2g-6g), ITS, mobile Apps & web/ IT services, AI

 

Dr. W.H Lam is an expert in digital mobile radio communications (2G/GSM, 3G,…5G), and also in the areas of Intelligent Transport Systems (ITS and GIS), program /software engineering and networking, wireless IT development, mobile APPs and website APPs development.

Dr. Lam has been active in the industry locally and internationally. He has been the chairman and organizer of a series of regional and international conferences on mobile radio communications and a distinguished speaker and chairperson of many international conferences & meetings. He has published more than 80 technical publications in the field of digital cellular mobile radio communications and IT.

Prior to joining HKU, graduated in UK, Dr.Lam had worked in UK for about 8 years long, all in the area of digital mobile radio communications, including British Telecom Research Laboratory (UK), STL (STC Technology Limited, UK) and Motorola Ltd. (Pan-European Digital Cellular Infrastructure R&D Centre, UK). Subsequently in returning to HK and having joined HKU, Dr. Lam had led an R&D team to develop products/services for cellular mobile phone systems (GSM/2G-6G), including “the validation systems /prototypes for Base Station (BS) and Mobile Station (MS, mobile phone)”, the GIS based radio network planning (radio signal strength prediction using ray-tracing) and GPS-based automatic measurement tool, ITS (intelligent transport systems), GPS based road traffic detection, web services and mobile Apps, AI and so on. In particular, he had lead / completed a number of various projects / contracts for various Government departments & organizations / companies, in the area of wireless, ITS, IT and web-services, mobile Apps, and so on.

 

 

Selected Publications

[3]       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.

[4]       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.

[5]       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.

[6]       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.

[7]       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.

[17]       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.

[18]       Zheng Z. and Lam W.H., “Performance Analysis of Dynamic Channel Assignment with Queuing and Guard Channel Combined Scheme for Handoff Prioritization”, IEE Electronics Letter. 2002, 38 No. 25: 1728-1729. (Publication No. : 82691)

[19]       Zheng Z. and Lam W.H., “An Analytical Method to Compute Capacity Improvement of Dynamic Channel Assignment with Power Control”, IEE Electronics Letter. 2003, 39 No. 1: 127-128. (Publication No. : 82695)

[20]       Y.H. Zeng, W.H.Lam and T.S. Ng, “Semiblind channel estimation and equalization for MIMO space-time coded OFDM”, IEEE Transactions on CIRCUITS-I 53 (2), page 463-474, FEB 2006.

[21]       David S. W. Hui, Vincent, K. N. Lau and W. H. Lam, “Cross Layer Designs for OFDMA Wireless Systems with Heterogeneous Delay Requirements,” IEEE Transactions on Wireless Communications, Vol. 6, No. 8, August 2007.

[22]       W. Zhou and W. H. Lam, “A fast LMMSE channel estimation method for OFDM systems, ”EURASIP Journal on Wireless Communications and Networking, vol. 2009, Article ID 752895, 13 pages, 2009.

[23]       W. Zhou and W. H. Lam, “Channel Estimation and Data Detection for OFDM systems over Fast Fading and Dispersive Channels”, IEEE Transactions on Vehicular Technology , vol. 59, no. 3, pp. 1381-1392, 2010.

[24]       W. Zhou, H. Chen, and W. H. Lam, “Optimality of beamforming condition for multiple antenna systems with mean feedback,” EURASIP Journal on Wireless Communications and Networking, vol. 2011, no. 160, 2011.

[25]       H. Chen, W.H.Lam, “Training Based Two-Step Channel Estimation in Two-Way MIMO Relay systems”, IEEE Trans. Veh. Technol., vol. 67, no. 3, pp. 2193–2205, Mar. 2018.

[28]       C. Jiang, K.T. Chau, C.H.T. Lee, W. Han, W. Liu, and W.H. Lam, “A wireless servo motor drive with bidirectional motion capability,” IEEE Transactions on Power Electronics, Volume: 34 , Issue: 12 , Dec. 2019.

[31]       H. Chen, S. C. Chan, W. H. Lam, “On the Convergence Analysis of Cubic Regularized Symmetric Rank-1 Quasi-Newton Method and the Incremental Version in the Application of Large-Scale Problems”, IEEE Access, vol. 7, pp. 114042 –114059, Aug. 16, 2019.

[32]       H. Chen, H. C. Wu, S. C. Chan, W. H. Lam , “A Stochastic Quasi-Newton Method for Large-Scale Nonconvex Optimization with Applications”, IEEE Transactions on Neural Networks and Learning Systems. Dec. 31, 2019.

 

 

Last updated: January 4th, 2021