A wideband spectrometer of 500 MHz instantaneous bandwidth is described that includes an implementation of the Spectral Kurtosis (SK) algorithm for automatic radio frequency interference (RFI) detection. An SK spectrometer accumulates both power and power-squared, which are then used to develop the SK estimator. The SK spectrometer of the Korean Solar Radio Burst Locator (KSRBL) has a 2 GHz ins...

There is a renewed interest in utilizing the upper portion of the baseband spectrum of an FM broadcast channel for digital data service. This part of the baseband spectrum was previously unused by the audio signal. In the presence of multipath interference, the instantaneous frequency of the received FM signal is a nonlinear combination of the instantaneous frequency of the transmitted signal a...

An efficient approach for instantaneous frequency (IF) rate estimation is proposed. It is based on a timefrequency rate representation with complex-lag argument. The proposed representation is derived in a manner to reduce the spread factor, and thus to provide high concentration along the IF rate. Due to the significantly reduced spread factor, it is suitable for periodically frequency modulat...

Using directed transfer function (DTF) and partial coherence (PDC) in the information version, this paper extends theoretical framework to incorporate instantaneous Granger causality (iGC) frequency domain description into a single unified perspective. We show that standard vector autoregressive models allow portraying iGC’s repercussions associated with connectivity, where interactions mediate...

Residential Ethernet (ResE) is a new standardization activity in IEEE 802 that is considering extensions to Ethernet to allow the transport of time-sensitive traffic. Applications that ResE is expected to carry will include digital video, high-fidelity digital audio, and gaming traffic, as well as traditional non-time-sensitive traffic (e.g., data traffic). One goal of ResE is to allow a single...

A 0.5 V CMOS light-to-digital converter (LDC) based on a nonuniform quantizer and off-chip photodiode enables a photodiode bias current range spanning 4 nA to 3.5 A while consuming less than 4 W of power. Using an off-chip LED as a modulated light source, measurements with a photodiode current signal having modulation frequency of 1.2 Hz (72 beats per minute) and 0.5% peak-to-peak amplitude rel...