The efficient acquisition and processing of propagation statistics

This paper shows that the use of a small computer system is an attractive proposition for cost-effective data logging and processing in the field of radio-propagation statistics, particularly when pre-processing and data reduction techniques are applied. In order to illustrate and emphasize the points detailed, reference is made to results obtained with an experimental system for the measurement of microwave scintillations on a satellite link at X-band, described in a companion paper. The requirements for reliable statistical measurements are discussed together with the advantages of on-line pre-processing in terms of reduced data storage requirements and the reduced computation necessary in later analysis. Finally the paper describes the design considerations of an on-line analogue spectrum analyser and its interface with a data logging and pre-processing unit.