Accession Number : AD0486136

Title :   A TEST OF THE MODE-AVERAGING DIVERSITY COMBINER.

Descriptive Note : Technical rept.,

Corporate Author : STANFORD UNIV CA STANFORD ELECTRONICS LABS

Personal Author(s) : Kawachika, N. M. ; Lomasney, J. M. ; Villard, O. G., Jr.

Report Date : MAY 1966

Pagination or Media Count : 37

Abstract : A novel diversity-combining principle, that of mode averaging, was described in an earlier technical report, TR No. 88. A test of a three-channel version of a combiner using this principle has now been made. To demonstrate the most distinctive feature of the combiner--its ability to fill in mode-interference nulls (or minima) in an hf radio channel--special frequency-modulated transmissions were used. It was found that substantial null filling occurred and that (as expected) the filling is more effective when a pair of antennas is spaced along the line to the distant station than when the same pair is spaced transversely with respect to that line. It is concluded that the first-order theory of this combining operation is correct. (Author)

Descriptors :   (*RADAR RECEIVERS, DIVERSITY RECEPTION), (*DIVERSITY RECEPTION, COMPARATORS), HIGH FREQUENCY, IONOSPHERIC PROPAGATION, INTERFERENCE, FREQUENCY MODULATION, ANTENNA ARRAYS.

Subject Categories : Electrical and Electronic Equipment
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE