Senior Researcher

Dr. Leif Hanlen

Canberra Research Laboratory

Email: leif.hanlen@nicta.com.au

Phone: +61 2 6267 6246

Mob: +61 4 1591 0267  

Fax: +61 2 6230 6121

Project Lead: BANESH

Project Lead: Fundamental Limits of Wireless

Dr Hanlen received a Bachelor of Science and Bachelor of Engineering in Electrical Engineering from the University of Newcastle, Australia, in 1999. His undergraduate studies were supported by the New South Wales Electrical Transmission Authority. He received a PhD in Channel Modelling and Capacity Analysis for Multi-input, Multi-output, Wireless Communication Systems in 2004 from the University of Newcastle.

Dr Hanlen’s research focuses on physical layer channel modelling and information theory for multiple antenna wireless communication systems. Other areas of interest are entropy; multi-antenna and multi-input, multi-output (MIMO) wireless communication; spatial and continuous communication systems; operator theoretic channel models; spatial and radio-location; and mobile communication physical-layer ad-hoc channel models.

His research concerns operator theoretic approaches to channel models, channel estimation, information theory, and radio-location.

Dr Hanlen is leading the Fundamental Limits of Wireless (FLoW) project. This project will develop deep theoretical insights into the fundamental constraints imposed on wireless communications and provide new directions for technologies that exploit these limits.

Publications

M. C. Reed, L. W. Hanlen, and G. Corazza, "Return link code acquisition for   1-D and 2-D with DS-CDMA for high capacity multiuser systems,''  IEEE Transactions on Wireless Communications, 2007.

L. W. Hanlen and T. D. Abhayapala, "Space-time-frequency degrees of freedom:   Fundamental limits for spatial information,'' in IEEE International  Symposium on Information Theory, ISIT, 2007,

------, "Bounds on space-time-frequency dimensionality,'' in Australian   Communications Theory Workshop, AusCTW, Feb. 5--7 2007, pp. 144--149.

R. C. Timo, A. J. Grant, and L. W. Hanlen, "Source coding for a noiseless   broadcast channel with partial receiver side-information,'' in  Australian Communications Theory Workshop, AusCTW, Feb. 5--7 2007, pp.   86--90.

G. N. Dickins, T. Betlehem, and L. W. Hanlen, "A stochastic MIMO model   utilising spatial dimensionality and modes,'' in IEEE Vehicular  Technology Conference, VTC, May 7--10 2006, p. session 8H.

R. C. Timo, L. W. Hanlen, and K. L. Blackmore, "A lower bound on network layer   control information,'' in Newcom-Acorn workshop, Sept. 2006

------, "Variable-length encoders are ergodic thus random waypoint mobility   model is stable,'' Australian National University, Tech. Rep. PA006135, May   2006.

O. Nagy and L. W. Hanlen, "Lower bounds on mutual information for interleave   division multiple access (IDMA),'' National ICT Australia, Tech. Rep.   PA006253, 2006.

R. C. Timo and L. W. Hanlen, "MANETs: Routing overhead and reliability,''  in IEEE Vehicular Technology Conference, VTC, Melbourne,  Australia, May 7--10 2006, p. session 11B.

L. W. Hanlen, R. C. Timo, and R. R. Perera, "On dimensionality for sparse  multipath,'' in Australian Communications Theory Workshop, AusCTW,  Feb. 1--3 2006, pp. 123--127.

M. Ruan, L. W. Hanlen, and M. C. Reed, "Spatially interpolated beamforming  using discrete prolate spheroidal sequences,'' in IEEE International  Conference on Acoustics Speech and Signal Processing, ICASSP, vol. 3,   France, May 14--19 2006, pp. 840--843.

D. B. Smith and L. W. Hanlen, "Unitary space-time signal designs with improved  performance using parametric equivalence,'' NICTA, Tech. Rep., 2006,  submitted to IEEE Transactions on Wireless Communications.

------, "Novel unitary space-time signal design,'' in IEEE Information  Theory Workshop, ITW, Mar. 2006, pp. 327--331.

L. W. Hanlen, "Preliminary channel measurements: Ais rowing project,''   National ICT Australia, Tech. Rep. PA006183, Sept. 2006.

R. Somaraju and L. W. Hanlen, "Uncertainty principles for signal  concentrations,'' in Australian Communications Theory Workshop,  AusCTW, vol. 1, Feb. 1--3 2006, pp. 36--40.

L. W. Hanlen and R. C. Timo, "Intrinsic capacity of random scattered spatial  communication,'' in IEEE Information Theory Workshop, ITW,  Oct.22--27 2006, pp. 281--285.

A. J. Grant and L. W. Hanlen, "Sub-optimal power allocation for MIMO   channels,'' in IEEE International Symposium on Information Theory,  ISIT, July 2006.

L. W. Hanlen and M. Fu, "Wireless communications with spatial diversity: A  volumetric model.'' IEEE Transactions on Wireless Communications,  vol. 5, no. 1, pp. 133--142, Jan. 2006.

L. Qiu, D. Jiang, and L. W. Hanlen, "Neural network prediction of radio  propagation,'' in 6th Australian Communications Theory Workshop,  AusCTW, Brisbane, Australia, Feb. 2--4 2005, pp. 252--256.

M. C. Reed, L. W. Hanlen, and G. Corazza, "Return link code acquisition with  DS-CDMA for high capacity multiuser systems under realistic conditions,''  in 6th Australian Communications Theory Workshop, AusCTW, Brisbane,   Australia, Feb. 2--4 2005, pp. 151--155.

B. Mondal, R. Heath Jr., and L. W. Hanlen, "Quantization on the Grassmann  manifold: Applications to precoded MIMO wireless systems,'' in  IEEE International Conference on Acoustics Speech and Signal  Processing, ICASSP, vol. 5, Pennsylvania, USA, Mar. 18--23 2005, pp.  v/1025 -- v/1028.

G. N. Dickins, M. I. Y. Williams, and L. W. Hanlen, "On the dimensionality of  spatial fields with restricted angle of arrival,'' in IEEE  International Symposium on Information Theory, ISIT, Adelaide, Australia,  Sept. 5--9 2005.

G. N. Dickins and L. W. Hanlen, "On finite dimensional approximation in  MIMO,'' in Asia Pacific Communications Conference, Oct. 2005, pp.  710--715.

R. Timo and L. W. Hanlen, "Entropy in ad-hoc networks: what price mobility?''  Australian National University, Tech. Rep., Jan. 2005.

R. C. Timo, K. Blackmore, and L. Hanlen, "On entropy measures for dynamic  network topologies: Limits to MANET,'' in 6th Australian  Communications Theory Workshop, AusCTW, Brisbane, Australia, 2005, pp.  89--94.

L. W. Hanlen and A. J. Grant, "On capacity of ergodic multiple-input  multiple-output channels,'' in 6th Australian Communications Theory  Workshop, AusCTW, Brisbane, Australia, Feb. 2--4 2005, pp. 121--124.

------, "Optimal transmit covariance for MIMO channels with statistical  transmitter side information,'' in IEEE International Symposium on  Information Theory, ISIT, Adelaide, Australia, Sept. 4--9 2005.

G. Dickins and L. W. Hanlen, "Fast calculation of singular values for MIMO  wireless systems,'' in 5th Australian Communications Theory Workshop,  AusCTW, Newcastle, Australia, Feb. 4--6 2004, pp. 185--190.

L. W. Hanlen, A. J. Grant, and R. A. Kennedy, "On capacity for  single-frequency spatial channels,'' in IEEE Information Theory  Workshop, ITW, San Antonio, USA, Oct. 24--27 2004, pp. 446--451.

------, "On the capacity of operator channels,'' in 5th Australian  Communications Theory Workshop, AusCTW, Newcastle, Australia, Feb. 4--6  2004, pp. 23--27.

M. C. Reed and L. W. Hanlen, "Return link code acquisition for DS-CDMA for  high capacity multiuser systems,'' in IEEE Eighth International  Symposium on Spread Spectrum Techniques and Applications, Sydney, Australia,  Aug. 30--2 Sept. 2004.

L. W. Hanlen and M. Fu, "On point-wise models for MIMO systems,'' in  IEEE Global Communications Conference, Globecom, Dallas, USA,  Nov. 29--3 Dec. 2004, pp. 76--80.

L. W. Hanlen, "Water-filling with channel correlation,'' in  4th Australian Communications Theory Workshop, AusCTW, Melbourne,  Australia, Feb. 4--5 2003, pp. 19--23.

L. W. Hanlen and M. Fu, "Wireless communications with spatial diversity: A  volumetric approach,'' in IEEE International Conference on  Communications, ICC, Anchorage, Alaska, May 11--15 2003, pp. 3001--3005.

M. Fu and L. W. Hanlen, "Capacity of MIMO channels: A volumetric  approach,'' in IEEE International Conference on Communications,  ICC, Anchorage, Alaska, May 11--15 2003, pp. 2673--2677.

L. W. Hanlen and A. J. Grant, "Capacity analysis of correlated MIMO  channels,'' in IEEE International Symposium on Information Theory,  ISIT, Yokohama, Japan, June 29--July 4 2003, p. 263.

L. W. Hanlen, "Channel modelling and capacity analysis for multi-input,  multi-output, wireless communication systems,'' Ph.D. dissertation, The  University of Newcastle, Apr. 2004.

L. W. Hanlen and M. Fu, "Capacity of MIMO wireless systems with spatially  correlated receive elements,'' in Proc. 1st Workshop on the Internet  Telecommunications and Signal Processing (WITSP), Wollongong, Australia,  Dec. 2002, pp. 55--60.

------, "Multiple antenna wireless communication systems: Limits to capacity  growth,'' in IEEE Wireless Communications and Networking Conference,  WCNC, Orlando, USA, Mar. 17 -- 21 2002, pp. 172--176.

------, "MIMO wireless systems: Capacity limits for sparse scattering,''  in 3rd Australian Communications Theory Workshop, AusCTW, Canberra,  Australia, Feb. 4--5 2002, pp. 11--14.