
Accession Number : AD0287162
Title : COMMENTARY ON A PAPER BY KUKLEV CONCERNING THE INFLUENCE OF NOISE ON A DECODING UNIT USING A PULSE CODE GROUP
Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
Personal Author(s) : MIDDLETON,DAVID
Report Date : 31 JUL 1962
Pagination or Media Count : 1
Abstract : A 1959 paper by Kuklev, which discusses the effects of noise on a decoding unit employing a pulse code group of up to five pulse elements, is examined from the viewpoint of (1) the basic model assumed, (2) the validity of the approximations involved and (3) the accuracy of the calculations presented. A translation of Kuklev's paper is given. In the detailed commentary presented, the signal detection probability is obtained as a function of the input signaltonoise (power) ratio at the input to the second detector before rectification and video limiting. This probability is obtained for conditions of both match and mismatch in the IF, and for one to five pulse elements in a code group, subject to a preset falsealarm probability of 1/1000, and to various approximations. Kuklev's basic model is found to be satisfactory and his approximations in most instances are reasonable. However, the accuracy of his calculations can be noticeably improved by more refined approximations. Calculations are presented for falsealarm probabilities different from the values considered by Kuklev. These calculations show the required increase in input signal level as the number of pulses in the code group is increased. (Author)
Descriptors : *COMMUNICATION THEORY, *RADIO INTERFERENCE, *RADIO SIGNALS, CODING, DETECTION, ERRORS, IDENTIFICATION, MATHEMATICAL ANALYSIS, PULSE MODULATION, SIGNALTONOISE RATIC, STATISTICAL ANALYSIS
Distribution Statement : APPROVED FOR PUBLIC RELEASE