Adaptive arrays for AM and FM signals
Abstract
This report describes progress under NASC Contract N00019-77-C-0156 during the fourth quarterly period. There are three areas of work under this contract. The first involves experimental tests of an adaptive array in an AM communication system. The second involves array experiments with an FM communication system. The third consists of theoretical studies of methods of integrating adaptive arrays into other types of conventional communication systems. The AM and FM communication systems involve the addition of a binary phase switching modulation on conventional AM and FM signals. The purpose of this phase switching is to allow the array to distinguish between the desired signal and interference. Implementation of the system with this phase switching requires an IF delay lock loop for the AM system and a Costas loop and baseband delay lock loop for the FM system, in addition to other minor circuitry.
- Publication:
-
Quarterly Report
- Pub Date:
- February 1978
- Bibcode:
- 1978osu..reptS....C
- Keywords:
-
- Adaptive Control;
- Arrays;
- Suppressors;
- Telecommunication;
- Amplitude Modulation;
- Electromagnetic Interference;
- Fm/Pm (Modulation);
- Signal To Noise Ratios;
- Communications and Radar