Error Probabilities for Telegraph Signals Transmitted on a Fading FM Carrier

Barrow, Bruce B.

doi:10.1109/jrproc.1960.287678

Cited by 24 publications

(1 citation statement)

References 11 publications

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“…This spread spectrum signal (SSS) is the baseband signal with wide bandwidth and decays rapidly during transmission. If it is directly used for long-distance baseband transmission, due to quick attenuation, the signal at the receiver will have a too-low signal-to-noise ratio (SNR) to be identified [39]. Therefore, the SSS needs to be modulated on a proper carrier.…”

Section: Transmission Of 1 Pps Signalmentioning

confidence: 99%

Measuring Height Difference Using Two-Way Satellite Time and Frequency Transfer

et al. 2022

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According to general relativity theory (GRT), the clock at a position with lower geopotential ticks slower than an identical one at a position with higher geopotential. Here, we provide a geopotential comparison using a non-transportable hydrogen clock and a transportable hydrogen clock for altitude transmission based on the two-way satellite time and frequency transfer (TWSTFT) technique. First, we set one hydrogen clock on the fifth floor and another hydrogen clock on the ground floor, with their height difference of 22.8 m measured by tape, and compared the time difference between these two clocks by TWSTFT for 13 days. Then, we set both clocks on the ground floor and compared the time difference between the two clocks for seven days for zero-baseline calibration (synchronization). Based on the measured time difference between the two clocks at different floors, we obtained the height difference 28.05.4 m, which coincides well with the tape-measured result. This experiment provides a method of height propagation using precise clocks based on the TWSTFT technique.

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Section: Transmission Of 1 Pps Signalmentioning

confidence: 99%

Measuring Height Difference Using Two-Way Satellite Time and Frequency Transfer

et al. 2022

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Digital Troposcatter Transmission and Modulation Theory

Sunde¹

1964

Bell System Technical Journal

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In tropospheric scatter transmission beyond the horizon, the amplitude, phase and frequency of a received sine wave exhibit random fluctuations owing to variable multipath transmission and noise. The probability of errors in digital transmission over such random multipath media has been dealt with in the literature on the premise of flat Rayleigh fading over the band occupied by the spectrum of transmitted pulses. This is a legitimate approximation at low transmission rates, such that the pulse spectrum is adequately narrow, but not at high digital transmission rates. The probability of errors is determined here also for high transmission rates, such that selective fading over the pulse spectrum band must be considered. Such selective fading gives rise to pulse distortion and resultant intersymbol interference that may cause errors even in the absence of noise. Troposcatter transmission can be approximated by an idealized multi‐path model in which the amplitudes of signal wave components received over different paths vary at random and in which there is a linear variation in transmission delay with a maximum departure ±Δ from the mean delay. Various statistical transmission parameters are determined on this premise, among them the probability distribution of amplitude and phase fluctuations and of derivatives thereof with respect to time and with respect to frequency. The probability of errors in the absence of noise owing to such fluctuations is determined together with the probability of errors owing to noise, for digital transmission by binary PM and FM. Charts are presented, from which can be determined the combined probability of errors from various sources, as related to the transmission rate and certain basic parameters of troposcatter links.

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Tests on reception of a trosposcatter signal with the aid of a parametric device

Gudmandsen¹,

Knudtzon²

1962

Solid-State Electronics

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Error Probabilities for Telegraph Signals Transmitted on a Fading FM Carrier

Cited by 24 publications

References 11 publications

Measuring Height Difference Using Two-Way Satellite Time and Frequency Transfer

Measuring Height Difference Using Two-Way Satellite Time and Frequency Transfer

Digital Troposcatter Transmission and Modulation Theory

Tests on reception of a trosposcatter signal with the aid of a parametric device

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