Showing papers on "Fading distribution published in 1972"
TL;DR: An intermittent on-off noiseless feedback scheme for binary communication over the slow- and fast-fading Rayleigh channels is proposed and analyzed and upper and lower bounds on the error probability for block orthogonal M -ary communication are presented.
Abstract: An intermittent on-off noiseless feedback scheme for binary communication over the slow- and fast-fading Rayleigh channels is proposed and analyzed. At high energy-to-noise ratios, doubling the number of feedback iterations yields a 3-dB power saving for the slowly fading channel. Power savings ranging from 1 dB for one feedback iteration to 9 dB for 16 iterations are typical for the fast-fading model. Also for the fast-fading model, by picking the optimum number of forward transmissions for each value of energy-to-noise ratio, the best achievable performance requires approximately 7.5 dB more energy than the minimum predicted by the rate-distortion bound. Also presented is a feedback communication system for wide-sense stationary, uncorrelated-scatterer, fading, and dispersive forward and feedback channels. The model used for both forward and feedback channels is Kennedy's. Upper and lower bounds on the error probability for block orthogonal M -ary communication are presented for this system.
5 citations
01 Jan 1972
TL;DR: While the error performance of the receiver is worse than that of the ideal MFSK receiver, it is interesting to note that the performance degradation due to the multipath fading diminishes as the product of bit duration and IF filter bandwidth becomes large.
Abstract: Studies have shown that there is a severe signal fading at the turbulent atmosphere of a distant planet such as Venus. The data may be lost during deep fade. It is the objective of this paper to examine the effects of multipath fading on the performance of the noncoherent coded system which is used for the low data-rate space communications especially with the small probes. An exact error probability of the wideband noncoherent MFSK receiver is derived from using the 'Rician' channel model. While the error performance of the receiver is worse than that of the ideal MFSK receiver, as expected, it is interesting to note that the performance degradation due to the multipath fading diminishes as the product of bit duration and IF filter bandwidth becomes large.
2 citations
TL;DR: It is seen that limiting does not necessarily improve receiver performance, as is often thought, when the input is a fading binary frequency-shift-keyed signal.
Abstract: In this paper the performance of a radiometric receiver preceded by a bandpass limiter is studied when the input is a fading binary frequency-shift-keyed signal. An expression for the probability of error versus signal-to-noise ratio, with receiver bandwidth as a parameter is derived. It is seen that limiting does not necessarily improve receiver performance, as is often thought.