EE359 Project



            Adaptive loading for MIMO/OFDM Systems

            Prateek Bansal
            Andrew Brzezinski



            Simulator Task Division:

            Andrew Brzezinski (brzezin@stanford.edu)

              Channel Simulator (Block Fading Assumption), including Transmit 
              Precoding and Receiver Shaping 
              Performance Analysis of Adaptive Modulation applied to MIMO/OFDM 
              Systems 
              Performance Analysis of Fixed OFDM Transmission for single antenna 
              system 
            Prateek Bansal (prateek@stanford.edu)

              Modulator/Demodulator(IFFT/FFT) Block and Cyclic Prefix Block for 
              OFDM Transmitter and Receiver 
              Performance Analysis of MIMO/OFDM System having selection 
              diversity at the transmitter and maximal ratio combining at the 
              receiver 
              Performace Analysis of Adaptive Modulation applied to single 
              antenna system

            Project Update:


            We have completed the literature survey and we have a basic outline 
            of the simulator structure.

            (Dec 1) We have completed the single antenna OFDM system with 
            adaptive modulation. The following blocks are part of the design: 
              Adaptive Bit Allocation 
              QAM Modulation (1, 2, 4, 16, 64, 256 QAM finite modulation order) 
              Circular Prefix and FFT 
              Channel Simulator 
              Remove Prefix and IFFT 
              Zero-forcing ML Decoding

            (Dec 9) We have completed the MIMO OFDM system with adaptive 
            modulation. This includes 
              precoder 
              shaper 
              matrix channel formulation 
              a fully functional variable rate variable power modulator.
            Further, we have implemented selection diversity at the transmitter, 
            and fixed OFDM for comparison purposes.

            Weekly Goals:

            Dec 2nd 2001: Have Implemented the Single Antenna System
            Dec 9th 2001: Have Implemented the MIMO System
            Dec 13th 2001: Completed Project Report


            Proposed Extensions:


            Analysis of Multiuser OFDM systems with single antennas. 
            Analysis of Multiuser MIMO/OFDM Systems. 


            References:


            Jorge Campello de Souza, "Discrete Bit Loading for Multicarrier 
            Modulation Systems", PhD Thesis. May, 1999

            Kai-Kit Wong et al, "Adaptive Spatial-Subcarrier Trellis Coded MQAM 
            and Power Optimization for OFDM Transmission", VTC2000, Page 
            2049-2053

            Cheong Yui Wong et al, "Multiuser OFDM with Adaptive Subcarrier, 
            Bit, and Power Allocation", IEEE Journal on Selected Areas in 
            Communications, Vol. 17, No. 10, October 1999, Page 1747-1758.

            Joonsuk Kim, John M. Cioffi, "Spatial Multiuser Access OFDM with 
            Antenna Diversity and Power Control", VTC2000, Page 273-279

            EE359 Course Reader