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Sequential signal encoding from noisy measurements using quantizers with dynamic bias control

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3 Author(s)
H. C. Papadopoulos ; Dept. of Electr. & Comput. Eng., Maryland Univ., College Park, MD, USA ; G. W. Wornell ; A. V. Oppenheim

Signal estimation from a sequential encoding in the form of quantized noisy measurements is considered. As an example context, this problem arises in a number of remote sensing applications, where a central site estimates an information-bearing signal from low-bandwidth digitized information received from remote sensors, and may or may not broadcast feedback information to the sensors. We demonstrate that the use of an appropriately designed and often easily implemented additive control input before signal quantization at the sensor can significantly enhance overall system performance. In particular, we develop efficient estimators in conjunction with optimized random, deterministic, and feedback-based control inputs, resulting in a hierarchy of systems that trade performance for complexity

Published in:

IEEE Transactions on Information Theory  (Volume:47 ,  Issue: 3 )