Accession Number:

AD0837396

Title:

TIME AND FREQUENCY DOMAIN CODING TECHNIQUES.

Descriptive Note:

Quarterly rept. no. 2, 1 Feb-31 May 68,

Corporate Author:

SYLVANIA ELECTRONIC SYSTEMS-EAST WALTHAM MA COMMUNICATION SYSTEMS DIV

Personal Author(s):

• Pierce, A.
• Cohn, D.
• Levesque, A.
• Meyn, J.

Report Date:

1968-07-01

Pagination or Media Count:

159.0

Abstract:

This is the second quarterly report on a program to determine and evaluate the most effective means of applying error control coding techniques to high-frequency data modems including the ANGSC-10, the ANFYC-5, the ANFGC-29, and the Sylvania modem one of whose operational modes is functionally equivalent to the ANUSC-10. The ultimate criteria for the selection of coding techniques will be 1 the performance exhibited in evaluation with real HF channel bit-error data, and 2 the practicality of implementation. This report presents detailed bit-error characteristics for the four modems operating over various HF paths. These characteristics include bit-error rates, bit-error correlations, bit-interleaved block-error distributions, and actual bit-error patterns in time and frequency where appropriate. They are used 1 to categorize the bit-error data, 2 to aid in determining how to most effectively apply error control coding, and 3 to aid in evaluating the performance of selected coding techniques. Author

Descriptors:

• (*DATA TRANSMISSION SYSTEMS
• DIGITAL SYSTEMS)
• (*TELETYPE SYSTEMS
• PERFORMANCE(ENGINEERING))
• (*CODING
• ERRORS)
• HIGH FREQUENCY
• MULTIPLEXING
• ATTENUATION
• NARROWBAND
• BROADBAND
• RADIO INTERFERENCE
• DECODING
• AUTOMATIC GAIN CONTROL
• CORRELATION TECHNIQUES
• MODULATION
• DEMODULATION
• CORRELATORS

Subject Categories:

• Cybernetics
• Radio Communications
• Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE