DocumentCode :
1061759
Title :
Novel Techniques for Counteracting Multipath Interference Effects in Receiving Systems
Author :
Baghdady, Elie J.
Author_Institution :
EJB Research Associates, Weston, MA
Volume :
5
Issue :
2
fYear :
1987
fDate :
2/1/1987 12:00:00 AM
Firstpage :
274
Lastpage :
285
Abstract :
Discrete maltipath propagation is generally considered to impose severe limitations on the performance of receiving systems, and hence, on the information transmission capacity of a communication link. Much work has been directed to the problems of relieving multipath effects, generally concentrating on correction of the performance realized with the resultant of the multiple-path outputs. In this paper, the emphasis is on separating the outputs of a small number of discrete paths not only for freeing the output of at least one usable path, but also possibly for combining the various path outputs in constructive ways to take advantage of the additional signal energy that each path provides. Novel techniques for accomplishing this are described, based on converting directional and propagation-delay differences into very distinctive frequency differences by synthetic Doppler methods. These techniques are of course applicable to facilitate the separation of various time and frequency overlapping signals arriving from different directions.
Keywords :
Communication terminals; Diversity methods; Delay estimation; Direction of arrival estimation; Frequency conversion; Frequency response; Geometry; Interference; Propagation delay; Signal processing; Transmitters; US Department of Defense;
fLanguage :
English
Journal_Title :
Selected Areas in Communications, IEEE Journal on
Publisher :
ieee
ISSN :
0733-8716
Type :
jour
DOI :
10.1109/JSAC.1987.1146518
Filename :
1146518
Link To Document :
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