Frequency Modulation Noise Characteristics

@article{Crosby1937FrequencyMN,
  title={Frequency Modulation Noise Characteristics},
  author={M.G. Crosby},
  journal={Proceedings of the Institute of Radio Engineers},
  year={1937},
  volume={25},
  pages={472-514}
}
  • M. Crosby
  • Published 1 April 1937
  • Physics
  • Proceedings of the Institute of Radio Engineers
Theory and experimental data are given which show the improvements in signal-noise ratio effected by frequency modulation over amplitude modulation. It is shown that above a certain carrier-noise ratio in the frequency modulation receiver which is called the "improvement threshold," the frequency modulation signal-noise ratio is greater than the amplitude modulation signal-noise ratio by a factor equal to the product of a constant and the deviation ratio (the deviation ratio is equal to the… 
Common-Channel Interference between Two Frequency-Modulated Signals
Two frequency-modulated signals received in the same frequency band produce an output from the receiver which is simply a combination of both signals and a beat note whose frequency is modulated in
A Technique for Lowering the Noise Threshold of Conventional Frequency, Phase and Envelope Demodulators
Envelope, phase and frequency demodulators exhibit a stronger-signal capture phenomenon which enables the noise to suppress the signal when the signal is the weaker of the two, and the signal to
Error rate in a multiple-frequency-shift system
Based on the assumption of a fading-free signal and an additive white Gaussian noise, the element and symbol error rates in a multiple-frequency-shift (m.f.s.) system and the output signal/noise
Theoretical Studies on Signal-to-Noise Characteristics of an FM System
  • H. Akima
  • Physics
    IEEE Transactions on Space Electronics and Telemetry
  • 1963
The essential signal-to-noise characteristics of an FM system are studied theoretically, assuming that the transmitted wave is frequency-modulated by a discontinuous signal, which is made by sampling
On Theoretical Signal‐to‐Noise Ratios in F‐M Receivers: A Comparison with Amplitude Modulation
Signal‐to‐noise ratios at the output of an f‐m receiver are determined as functions of the input signal‐to‐noise ratio, clipping level, and i‐f and audio filter characteristics when random
Noise problems in pulse communication
Formulae for random noise in the audio-frequency output in pulse-communication receivers are given for pulse-length-, pulse-phase- and pulse-frequency-modulation systems in which the received pulses
The Demodulation of an F‐M Carrier and Random Noise by a Limiter and Discriminator
Certain mathematical representations of a limiter and discriminator are postulated. On this basis, and on the basis of the statistics of narrow‐band random noise, the output signal voltage and r.m.s.
Communication by Phase Modulation
Practical methods of generating and receiving phase modulation are described which open up the possibility of using phase modulation as a communication system. A new receiver is described which uses
Signal-to-Noise Ratio in the Bandpass Output of a Discriminator
  • G. A. McKay
  • Physics
    IEEE Transactions on Aerospace and Electronic Systems
  • 1970
A formula is derived for the output signal-to-noise power ratio from a limiter-discriminator that is followed by an ideal (rectangular) bandpass filter. This signal-to-noise ratio is shown to be
A Theoretical and Experimental Investigation of Tuned-Circuit Distortion in Frequency-Modulation Systems
  • D. L. Jaffe
  • Physics, Engineering
    Proceedings of the IRE
  • 1945
The problem of distortion introduced into the modulation intelligence by tuned circuits is considered both theoretically and experimentally. Complex equations result when the effect of the
...
...

References

SHOWING 1-3 OF 3 REFERENCES
Fluctuation Noise in Radio Receivers
  • S. Ballantine.
  • Physics
    Proceedings of the Institute of Radio Engineers
  • 1930
This paper discusses fluctuation noise in radio receivers due to shot and thermal effects (Schottky) in the radio-frequency circuits. The r-f noise components beat with the carrier when a signal is
Frequency Modulation Propagation Characteristics
  • M. Crosby
  • Physics
    Proceedings of the Institute of Radio Engineers
  • 1936
Early work on frequency modulation is described wherein the propagation characteristics of frequency modulation were determined for frequencies between 9000 and 18,000 kilocycles. Oscilloscopic wave
The Reduction of Atmospheric Disturbances
  • J. R. Carson
  • Physics
    Proceedings of the Institute of Radio Engineers
  • 1928
In the decade or so during which the problem of eliminating or at least reducing atmospheric disturbances has been given serious and systematic study we have learned, more or less definitely, what we