Open AccessProceedings Article
Dithered Quantizers
Robert M. Gray,T.G. Stockham +1 more
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In this paper, a unified derivation and presentation of two forms of dithered quantizer noise based on elementary Fourier techniques is provided, both subtractive and nonsubtractive.Abstract:
A theory of overall quantization noise for nonsubtractive dither was originally developed in unpublished work by J.N. Wright and by T.J. Stockham and subsequently expanded by L.K. Brinton, S.P. Lipshitz, J. Vanderkooy, and R.A. Wannamaker. It is suggested that since these latter results are not as well known as the original results, misunderstanding persists in the literature. New proofs of the properties of quantizer dither, both subtractive and nonsubtractive, are provided. The new proofs are based on elementary Fourier series and Rice's characteristic function method and do not require the use of generalized functions (impulse trains of Dirac delta functions) and sampling theorem arguments. The goal is to provide a unified derivation and presentation of the two forms of dithered quantizer noise based on elementary Fourier techniques. >read more
Citations
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Quantization
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TL;DR: The key to a successful quantization is the selection of an error criterion – such as entropy and signal-to-noise ratio – and the development of optimal quantizers for this criterion.
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Throughput Analysis of Massive MIMO Uplink With Low-Resolution ADCs
TL;DR: It is illustrated that, for the 1-bit quantized case, pilot-based channel estimation together with maximal-ratio combing, or zero-forcing detection enables reliable multi-user communication with high-order constellations, in spite of the severe nonlinearity introduced by the ADCs.
References
More filters
Book
What Is Stochastic Resonance? Definitions, Misconceptions, Debates, and Its Relevance to Biology
Mark D. McDonnell,Derek Abbott +1 more
TL;DR: This work challenges neuroscientists and biologists to embrace a very broad definition of stochastic resonance in terms of signal-processing “noise benefits”, and to devise experiments aimed at verifying that random variability can play a functional role in the brain, nervous system, or other areas of biology.
Journal ArticleDOI
Scalar Costa scheme for information embedding
TL;DR: A complete performance analysis of the scalar Costa scheme (SCS), which is a suboptimal technique using scalar embedding and reception functions, and results with state-of-the-art coding techniques are compared.
Journal ArticleDOI
Throughput Analysis of Massive MIMO Uplink With Low-Resolution ADCs
TL;DR: It is illustrated that, for the 1-bit quantized case, pilot-based channel estimation together with maximal-ratio combing, or zero-forcing detection enables reliable multi-user communication with high-order constellations, in spite of the severe nonlinearity introduced by the ADCs.
Journal ArticleDOI
Sequential signal encoding from noisy measurements using quantizers with dynamic bias control
TL;DR: It is demonstrated 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.
Proceedings ArticleDOI
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