E. F. Charles LaBerge

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The use of intentionally transmitting portable electronic devices, such as cell phones, WiFi devices, Bluetooth headsets, etc., is widespread and growing. RTCA Special Committee 202 has been considering guidelines for the use of such devices on aircraft. A key element of the assessment of such devices is the quantitative expression of the effect of the(More)
To reduce the number of false-positives in our screening program for neonatal hypothyroidism, we investigated the effect of age, body weight, and interval between sampling and analysis on results for filter paper spot thyroxine determination. The statistical analysis included an analysis of covariance. The age of the infant did not influence the results,(More)
This paper studies the in-band interference of time-hopping spread spectrum (TH-SS) UWB signals to narrow band receivers. Based on the analysis of general power spectral density (PSD) of TH-SS UWB signal, the interference of UWB signal can be partitioned into two parts: (1) additive white Gaussian noise interference (2) jamming tone interference. Following(More)
The use of RFID tags to identify and track cargo is already common, and expected to grow. Inevitably, many such tags will be used on air freight shipments. Therefore, the effects of such RFID tags on common avionics is an issue of concern to owners, operators, regulators and the traveling public. A recent study by NASA Langley Research Center identified a(More)
This paper summarizes results from recent studies by EUROCONTROL and provides several examples to estimate the probability of co-site, but off channel, interference between VHF voice transmissions and reception of VHF data transmissions, including ADS-B signals. The results suggest that such co-site interference - even at frequencies well separated from the(More)
— This paper studies the in-band interference of time-hopping spread spectrum (TH-SS) ultra-wideband (UWB) signals to narrowband receivers. Based on the analysis of general power spectral density (PSD) of TH-SS UWB signal, the interference of UWB signal is partitioned into two parts: (1) additive white Gaussian noise interference, and (2) jamming tone(More)
This paper presents a general method for establishing the allowable emission characteristics of both unwanted and intentional in-band emissions in a manner that ensures protection of aeronautical radio communications, navigation and surveillance systems. The methodology is based on a two-tiered approach, and has been used in the development of DO-235A and(More)
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