R&D Report 1963-14 : Television co-channel interference: Some effects of the modulation of the interfering signal. E.W. Taylor The configuration of the interference pattern produced when a television transmission suffers co-channel interference from another television signal is examined in detail, in order to determine the process by which the interfering modulation gives rise to additional patterns. The description of these patterns in terms of the carriers and side-bands of the two...
Topics: interfering, frequency, pattern, signal, wanted, sideband, subsidiary, sidebands, principal,...
R&D Report 1968-43 : Calculation of the field strength required for a television service, in the presence of co-channel interfering signals. Part 2: Effect of multiple interfering sources E. Sofaer With the great expansion in television services in Europe and elsewhere, several transmitting stations will be operating in the same frequency channel. To any one service all transmitters sharing the channel are sources of interference, and it is therefore necessary that some method of estimating...
Topics: probability, deviation, location, signal, standard, field, interference, protection, strength,...
R&D Report 1968-47 : The subjective assessment of multiple co-channel television interference A. Brown The increase in protection ratio required by a number of simultaneous constant-level interfering signals, compared with the ratio required for a single interfering signal is considered. The results of some subjective tests are presented, and formulae are deduced to enable the additional protection ratio to be calculated, for related and unrelated types of interference
Topics: interferences, interfering, subjective, addition, signals, unrelated, impairment, interference,...
R&D Report 1970-11 : Combined effect of several interfering signals J.W. Head When a site is considered for a new radio or television transmitter the best available assessment of interference expected from existing transmitters operating on or near the same frequency is required. This involves calculation of the combined effect of two or more interfering signals simultaneously present. The information available about each interfering signal is its distribution in time, that is, the...
Topics: signals, signal, distribution, quantized, correlation, probability, resultant, interfering,...
R&D Report 1973-08 : Computer program: MF sky-wave interference J.L. Eaton, A.M. Bunting A short self-contained computer program for calculating sky-wave interference at MF has been written. The program employs a simple empirical law for calculating field-strength and makes a correction for the transmitting aerial vertical radiation pattern, the take-off angle being derived from the great circle distance and the number of 'hops'. Protected field-strengths are calculated for each wanted...
Topics: transmitter, frequency, transmitters, interference, bbc, weighting, program, interfering, ccir,...
R&D Report 1978-31 : 'CARFAX' traffic information service: an analysis of the characteristics of the ring system and receiver activation. M.J. Kalloway The Report describes the development of a modified form of the original BBC proposal for a Traffic Information Service known as the 'ring' system. In the ring system, the motorist's receiver selects the strongest signal available from local transmitters by making use of the fm 'capture' effect in conjunction with an fm signalling system. The...
Topics: signal, signals, interfering, receiver, ring, amplitude, transmitter, carrier, capture,...
R&D Report 1982-05 : Carfax': the effects of co-channel interference. M.E. Bailey The Report describes subjective tests performed to ascertain the level of co-channel interference that would be tolerable during the reception of a "CARFAX" announcement, due to other distant "CARFAX" transmissions occurring simultaneously.
Topics: interfering, interference, signals, message, coded, carrier, tests, signal, transmitters,...
R&D Report 1984-12 : The susceptibility of aeronautical navigational aids to interference from adjacent-band broadcast transmissions. G.H. Millard Measurements to determine the susceptibility of some airborne navigation receivers to interference from v.h.f/f.m sound transmissions are described. The measurements were designed to investigate both the response to interference radiated in-band and to intermodulation in the receivers . The results of the measurements were submitted to an ITU...
Topics: receiver, ils, interference, intermodulation, frequency, signal, mhz, broadcast, transmissions,...
Bell System Technical Journal, 59: 7. Sept 1980 pp 1241-1255. Address Assignment for a Time-Frequency-Coded, Spread-Spectrum System. (Einarsson, G.)
Topics: probability, address, signals, error, signal, user, system, transmitted, interference,...
Bupesh Pandita - Oversampling A_D Converters with Improved Signal Transfer Functions
Topics: modulator, complex, stf, frequency, signal, filter, ntf, adc, output, input, transfer functions,...
