Accession Number:

AD0852786

Title:

Active Interference Cancellation Systems.

Descriptive Note:

Final rept. 20 Nov 67-30 Nov 68,

Corporate Author:

AMERICAN NUCLEONICS CORP GLENDALE CA

Personal Author(s):

• Sauter, Walter A.
• Ghose, Rabindra N.

Report Date:

1969-04-01

Pagination or Media Count:

59.0

Abstract:

The report discusses the principles and performance of an active Interference Cancellation System fabricated for UHF communication applications. The system employs a synchronous cancellation technique for the suppression of adjacent channel interferences. Two experimental models were fabricated for checkout in operational situations where transmitting sources are collocated with the receiver. The Interference Cancellation System ICS is designed such that no existing equipment modification is necessary for the cancellation of any selected interference. The system involves linear processing. The experimental models provide 80 dB of suppression to AM without tuning in the 225 to 400 MHz band. They are capable of simultaneously suppressing two interfering signals with levels as high as 20 dBm and frequency separations as low as .025 MHz. The insertion loss for the desired signal is less than 5 dB. Author

Descriptors:

• *COMMUNICATION AND RADIO SYSTEMS
• *ELECTROMAGNETIC WAVE FILTERS
• RADIOFREQUENCY INTERFERENCE
• ULTRAHIGH FREQUENCY
• RADIO EQUIPMENT
• SYNCHRONIZATION(ELECTRONICS)
• RADIOFREQUENCY FILTERS
• MODEL TESTS
• ELECTRIC FILTERS

Subject Categories:

• Electrical and Electronic Equipment
• Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE