2002 EMPLOYEE’S REPORT ON ACTIVITIES AND ACCOMPLISHMENTS

Name: Dragan Samardzija Dept.: BL10009650 SRD: 10009650 Date: September 2002

ACCOMPLISHMENTS

I have been working on the following projects:

  1. Wideband (UMTS) MIMO Test-Bed: Algorithm Implementation, Evaluation and Demonstration Platform
  • The goal of this project was to develop a software and hardware system capable of 4x4 UMTS MIMO algorithm evaluations, measurements and demonstration.
  • Most of the work on this project was conducted in the second half of 2001 and first half of 2002.
  • Joint project involving wireless research laboratory and wireless business unit.
  • Platform is based on (i) Lucent pre-commercial base station OneBTS, (ii) reference terminal unite.
  • I have been responsible for:
  • FPGA platform: (i) implementing RF/AD interface, (ii) integrating 4x4 RAKE-like receiver, (iii) integrating MIMO channel estimator, (iv) synchronization of chip level and symbol level processing.
  • DSP platform symbol level processing, implementing: (i) zero forcing VBLAST receiver, (ii) maximum likelihood receiver, (iii) channel coding (ad hock solution for block coding) (iv) interfacing network processor.
  • System evaluations/measurements: (i) SNR, (ii) error vector magnitude, (iii) keyhole tests, (iv) estimating receiver and transmitter noise (phase noise, imperfect sampling, jitter…).
  • Algorithm performance evaluations: BER and FER (over-the-air measurements and comparisons against simulation predictions) for various receiver detection algorithms.
  • Indoor MIMO channel capacity measurements.
  • The project resulted in
  • 4x4 UMTS MIMO system.
  • Supporting two users.
  • Aggregate rates of 1Mbps.
  • Streaming video application for presentation purposes.
  • Project is presented on CTIA 2002.
  • Results are submitted for publication in [1].
  • Results are presented in an official document of the FITNESS project [2] (personally involved in making the results available for the FITNESS project).
  • In spring 2002 I gave a couple of presentations of our work in Whippany, for our colleagues in wireless business unit.
  • I put an effort to communicate and work with colleagues in other research departments (wireless and computer science) and wireless business unit.
  1. Experimental and Demonstration HSDPA Platform
  • Goal of the project is to develop a demonstration for 1x1 (conventional) and 4x4 HSDPA system.
  • The physical layer processing is based on MIMO ASIC and turbo decoder ASIC that has been developed by our colleagues in Australia, Bell Labs.
  • This is on going project and it is in its implementation stage.
  • Intensive work with wireless business unit and different research departments (Whippany, UK, Australia, computer science department…)
  • I have been responsible for (currently working on):
  • OneBTS transmitter FPGA platform: (i) implementing interfaces to the MAC layer, (ii) integrating turbo encoder, (iii) chip level processing: scrambling, spreading, modulation, and pilots, (iv) interfacing RF system of the OneBTS transmitter
  • Reference receiver: (i) implementing RF/AD interface, (ii) integrating/interfacing MIMO ASIC, (iii) integrating/interfacing turbo decoder ASIC, (iv) developing channel estimation and auxiliary receiver physical layer functionality, (v) interfacing higher layers.
  • Performance evaluations: (i) performance of the MIMO ASIC and turbo decoder ASIC using over-the-air measurements (NOTE: first results are expected by the end of this calendar year).
  1. PhantomNets (work led by Jerry Foschini)
  • The goal is to study novel concepts of spectrally efficient physical layer and resource allocation solutions.
  • I have started with the study in summer 2002 and it is ongoing effort.
  • I have been responsible for (currently working on):
  • Feasibility study of the dirty paper coding (DPC) and its implementation aspects: (i) proposing the SNR regions (dynamic range), (ii) simulating realistic DPC schemes, (iii) analyzing real world impairments relevant to DPC (e.g., imperfect sampling and ISI in presence of very strong interferer).
  • Theoretical study of the cell coordination and/or distributed antennas. For idealized conditions, the initial simulation results showed significant gains.
  • This study may result in experimental test bed for the DPC and/or distributed antenna solutions.
  1. Work with Academia
  • I am a part-time Ph.D. student at Rutgers University.
  • I have been working with the Wireless Information Laboratory (WINLAB), Rutgers University.
  • This year, the work resulted in conference publications [3, 4].
  • Spring 2002 I passed the Ph.D. qualification exam (critical milestone towards the Ph.D. degree).
  • Expected time of Ph.D. thesis defense: end of 2003 beginning of 2004.
  1. Other Activities
  • I have been reviving and maintaining BLADE web site. Making it an information source for different projects (e.g., HSDPA, BLAST, and amplifier distortion project (Zhengxiang Ma contribution), file depository, technical talks...).
  • Attending seminars and product presentations (e.g., Xilinx, Altera, Texas Instruments…)
  • IEEE editor (I have reviewed numerous conference and journal submissions in the last year).
PUBLICATIONS

[1] T. Sizer, D. Samardzija, et al., Prototype Experience for MIMO BLAST over Third Generation Wireless System, submitted for publication: JSAC, Special Issue on MIMO, May 2002.

[2] D. Samardzija, A. Lozano, C. Papadias, A. Alexiou, MTMR UMTS Testbed: Description and Preliminary Tests, document of Europena Union sponsored project Fitness, 2002.

[3]D. Samardzija, N. Mandayam, Estimation of Fading Channel Response and System Capacity Considerations, Conference on Information Sciences and Systems (CISS), Princeton, 2002.

[4] D. Samardzija, N. Mandayam, Pilot Assisted Estimation of MIMO Fading Channel Response and Achievable Data Rates, Workshop on Signal Processing for Wireless Transmission, DIMACS, 2002

.

[5] D. Samardzija, C. Papadias, R. Valenzuela, Experimental Evaluation of Unsupervised Channel Deconvolution for Wireless Multiple-Transmitter/Multiple-Receiver Systems, to appear in IEE, 2002.

Signature ______

Date: 9/20/02

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