Spike processing is one kind of hybrid analog-digital signal processing, which has the efficiency of analog processing and the robustness to noise of digital processing. When instantiated with optics, a hybrid analog-digital processing primitive has the potential to be scalable, computationally powerful, and have high operation bandwidth. These devices open up a range of processing applications...

Hybrid precoding can significantly reduce the number of required radio frequency (RF) chains in millimeter-Wave (mmWave) massive MIMO systems. However, existing hybrid precoding based on singular value decomposition (SVD) requests the complicated bit allocation to match the different signal-tonoise-ratios (SNRs) of different sub-channels. In this paper, we propose a geometric mean decomposition...

We developed an asynchronous spiking photonic neuron that forms the basic building block for hybrid analog/digital lightwave neuromorphic processing. Our approach enables completely asynchronous spiking in response to input signals while maximizing the throughput relative to synchronous approaches. Asynchronous operation is achieved by generating the spike source for the photonic neuron through...

The quality of speech, or important speech parameters such as the intelligibility, clearness or naturalness of speech, can be emphasized by signal processing. Such processing for improving speech quality can be found in telecommunication applications, e.g. mobile telephony, internet telephony or personal intercom. Blind methods are preferable over conventional because they do not require calibr...

We propose and analyze the error and timing of solvers consisting of both analog and digital circuitry for sparse linear systems of equations. We obtain high speed, but low precision from the analog circuits. We combine this with low speed, but high precision from the digital circuits. The hybrid circuit should be faster than digital circuits alone. As a preconditioner to standard iterative sol...

A scalable source coder was designed for a hybrid HDTV terrestrial broadcasting system. The hybrid combination of analog and digital methods allows for both high video compression ratios and eecient utilization of the available channel capacity. EEcient channel utilization enables closer receivers to decode high quality video, and allows further receivers to decode natural looking, though lower...

The architecture for very-high speed DAC with medium oversampling and high resolution is discussed. The scheme uses an hybrid sigma-delta scheme that processes LSBs of the input word and obtain digital to analog conversion with an hybrid current steering DAC with dynamic element matching of MSBs and time interleaved conversion of LSBs. The return-to-zero for all elements ensures the required li...

Hybrid filter bank analog-to-digital converters (ADCs) have been proposed as a candidate for high-speed, high-resolution analog-to-digital conversion. It is a generalization from time-interleaved ADCs, but it has the advantage that the mismatch errors inherent in parallel converters are attenuated by the filters. This paper gives an overview of hybrid filter bank ADC analysis and design. Furthe...

We review the pros and cons of analog and digital computation. We propose that computation that is most efficient in its use of resources is neither analog computation nor digital computation but, rather, a mixture of the two forms. For maximum efficiency, the information and information-processing resources of the hybrid form must be distributed over many wires, with an optimal signal-to-noise...