Accession Number : AD0703704

Title :   A TIME-SHARING SCHEME FOR ALLEVIATING INTERFERENCE IN COLLOCATED RADIO EQUIPMENTS.

Descriptive Note : Technical rept.,

Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y

Personal Author(s) : Spina,John Frank

Report Date : MAR 1970

Pagination or Media Count : 146

Abstract : The need to locate several radio transmitters and receivers in close proximity due to space limitations and yet be able to operate them simultaneously introduces severe interference. The purpose of the report is to discuss the feasibility of using a time-sharing approach to alleviate or eliminate some of these problems. The central idea to be investigated is the concept of a switching arrangement such that individual equipments 'take turns' in performing their designated function. That is, at any instant of time, only one equipment (transmitter or receiver) in the complex is communicating. The switching must be done at a rate such that no loss of information occurs. This switching rate is specified by the sampling theorem, where the rate is a function of the highest frequency component in the message. Attention is focused on the method of switching or sampling, with particular emphasis on the shape of the sampling signal. The trade-offs in terms of spectrum width, signal level, and numbers of equipments to be handled are examined for several sampling pulse shapes. (Author)

Descriptors :   (*COMMUNICATION AND RADIO SYSTEMS, TIME SHARING), (*RADIOFREQUENCY INTERFERENCE, REDUCTION), ULTRAHIGH FREQUENCY, RADIO TRANSMITTERS, RADIO RECEIVERS, SAMPLING

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE