SPAWC 2009, 10th IEEE International Workshop on Signal Processing Advances in Wireless Communications, June 21-24, 2009, Perugia, Italy
This paper examines a beamforming approach towards reducing the power consumption in oversampling sigma delta (SigmaDelta) analog to digital converters (ADC's) for multiuser antenna array communication systems. We propose a setup where the output of the ADC's are fed-back to the input of a SigmaDelta modulator through a beamformer to cancel the contributions of interfering signals. We examine the feasibility of such ADC's and propose algorithms to estimate the beamformer and cancel the interfering users. Simulation results show that introducing such algorithms inside the SigmaDelta modulators results in reducing interferer power up to a factor of four for a scenario with 2 users and 4 antennas.
Type:
Conference
City:
Perugia
Date:
2009-06-21
Department:
Communication systems
Eurecom Ref:
2858
Copyright:
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