A new adaptive filter/IFM receiver system
Abstract
An important requirement for ECM systems is a microwave filtering device known variously as a signal thinner, switched multiplexer (SM) or switched filter bank. There are severe fundamental and practical difficulties associated with this device as presently envisaged. In the systems application considered, the switched multiplexer is followed by an instantaneous frequency measuring (IFM) receiver and possibly by other receivers. This paper outlines a method for overcoming the major problems of the contiguous SM by splitting it into separate odd and even SMs, followed by separate IFM receivers that are made simpler than the original single IFM receiver. This is accomplished by taking advantage of the channelization action of the SMs. The new arrangement appears to give at least 6 dB improvement over existing techniques with respect to coincident signal interference.
- Publication:
-
Microwave Journal
- Pub Date:
- November 1987
- Bibcode:
- 1987MiJo...30...79L
- Keywords:
-
- Adaptive Filters;
- Electromagnetic Compatibility;
- Frequency Measurement;
- Multiplexing;
- Radio Receivers;
- Switching Circuits;
- Electromagnetic Interference;
- Microwave Filters;
- Electronics and Electrical Engineering