Karl S. Gugel

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This paper describes the design and implementation of a fully pipelined 64-point Fast Fourier Transform (FFT) in programmable logic. The FFT takes 20-bit fixed point complex numbers as input and after a known pipeline latency produces 20-bit complex values representing the FFT of the input. It is designed to allow continuous input of samples and is(More)
This paper presents a powerful and flexible Digital Signal Processing (DSP) architecture based on the Texas Instruments TMS320VC33 DSP and high speed PCI bus. The DSP board provides a convenient, flexible means to test signal processing algorithms in real-time hardware. Algorithms implemented for several research projects include Normalized Least Mean(More)
— In this paper, we present a design for a wearable DSP system that is capable of processing various neural-to-motor translation algorithms. The system first acquires the neural data through a high speed data bus in order to train and evaluate our prediction models. Then via a widely used protocol, the low-bandwidth output trajectory is wirelessly(More)
Transversal adaptive filters for digital signal processing have traditionally been implemented into DSP processors due to their ability to perform fast floating-point arithmetic. However, with its growing die size as well as incorporating the embedded DSP block, the FPGA devices have become a serious contender in the signal processing market. Although it is(More)
In this paper, we present a design for a wearable computational DSP system that alleviates the issues of a previous design and provides a much smaller and lower power solution for the overall BMI goals. The system first acquires the neural data through a high speed data bus in order to train and evaluate prediction models. Then it wirelessly transmits the(More)
A design challenge of portable wireless neural recording systems is the tradeoff between bandwidth and power consumption. This paper investigates the compression of neuronal recordings in real-time using a novel discriminating Linde-Buzo-Gray algorithm (DLBG) that preserves spike shapes while filtering background noise. The technique is implemented in a low(More)
This work is dedicated to my wife, Shalomoth Plew. Her love and support during this research allowed me to not only accomplish my goals for this project, but also ensured that my life was filled with happiness. It is also dedicated to my father, Richard Plew, who made all of this possible. It was his support and guidance through the many years of high(More)
In earlier work on mapping multi-channel neural spike data (recorded from multiple cortical areas of an owl monkey) to corresponding 3d monkey arm positions, we observed that single continuous function approximators (such as artificial neural networks) have difficulty in jointly estimating 3d arm positions for two distinct cases — namely, when the monkey's(More)