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| Year : 2010 | Volume
: 56
| Issue : 3 | Page : 175-178 |
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Adaptive Modulation and Beam-forming for OFDM MIMO Systems with Rate-limited Feedback
Debasish Deb
Electronics and Radar Development Establishment, CV Raman Nagar, Bangalore, India
Correspondence Address:
Debasish Deb
Electronics and Radar Development Establishment, CV Raman Nagar, Bangalore
India
 DOI: 10.4103/0377-2063.67102
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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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