Angle Diversity Reception for LOS Digital Microwave Radio

Author

Hubbard, R.W.

Author_Institution

U.S. Department of Commerce, National Telecommunications and Information Administration, Institute for Telecommunication Sciences, Boulder, CO 80303

Volume

2

fYear

1985

fDate

20-23 Oct. 1985

Firstpage

387

Lastpage

393

Abstract

Digital transmission over line-of-sight (LOS) microwave links is impaired at times by multipath fading in the propagation channel. The multipath can be a result of surface reflections, or induced by atmospheric anomalies such as strong ducting gradients. One principal method of overcoming the effects of multipath is to use a form of diversity transmission and reception. The common forms of diversity in LOS links are frequency and space, or combinations of both in severe cases. This paper describes an alternative form of diversity using angle (of arrival) diversity at the receiving terminal. This form of diversity has the advantages of a) limiting the antenna elevations required for space diversity, and b) spectral efficiency when compared with frequency diversity.

Keywords

Antennas and propagation; Diversity reception; Fading; Frequency diversity; Microwave antennas; Microwave propagation; RF signals; Receiving antennas; System testing; US Department of Commerce;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 1985. MILCOM 1985. IEEE

Conference_Location

Boston, MA, USA

Type

conf

DOI

10.1109/MILCOM.1985.4795056

Filename

4795056