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A feasibility study for the detection of weak electromagnetic signal/bursts with hard-limited arrays.

Authors
Kanefsky-M; Rajput-AQK
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract J0318033, 1981 Nov; :1-138
NIOSHTIC No.
10003948
Abstract
The objective of this report was to investigate the use of a noncoherent detector based on polarity-coincidence statistic. Two channel, polarity-coincidence and polarity-difference, statistics were analyzed. The signal, common to both channels, consists of sinusoidal bursts where the exact frequency of the signal is nearly known, but other parameters such as amplitude, phase, and pulse starting time are unknown. The noise inputs are dependent, narrow band, Markov processes. It is shown that the performance depends not only on the signal uncertainties, but on the precise shape of the cross-correlation functions between the noise inputs. By using two polarity-difference statistics in addition to the polarity-coincidence statistic, it is shown that the decrease in performance, as well as the cost of hard limiting due to correlated inputs, can be made small.
Keywords
Mining-industry; Mine-escapes; Mine-rescue; Radio-waves
Publication Date
19811101
Document Type
CP; Final Contract Report
Fiscal Year
1982
NTIS Accession No.
PB84-188846
NTIS Price
A08
Identifying No.
OFR-102-84; Contract-J0318033
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract J0318033
State
PA
Performing Organization
University of Pittsburgh
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