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Abstract
In this paper, an adaptive modulation and beam-forming strategy for orthogonal frequency division multiplexing (OFDM) multiple-input multiple-output (MIMO) systems with rate-limited feedback is presented. It utilizes the correlation between OFDM subcarriers to reduce the amount of feedback of channel states from a receiver to a transmitter. An expression for the correlation coefficient between the squared gains of channel taps of the OFDM subcarrier for a Rayleigh fading channel with uniform and exponential multipath profile is derived. The performance of the proposed feedback strategy is compared with the one proposed.
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Debasish Deb
Debasish Deb received his B.E degree from R.E.C, Silchar and M.Tech from IIT Kanpur. He is working with Electronics and Radar Development Establishment since 1999. His field of interest includes radar system design, algorithm design for radar and communication systems. He is currently working in the field of MIMO systems. E-mail: [email protected]