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IMPROVED HF MODEM USING CONVOLUTIONAL CODING
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UNSPECIFIED (1992) IMPROVED HF MODEM USING CONVOLUTIONAL CODING. ELECTRONICS & COMMUNICATION ENGINEERING JOURNAL, 4 (2). pp. 73-82. ISSN 0954-0695.
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Abstract
The paper describes the design of a digitally implemented modem for use over HF (2-30 MHz) radio channels. As a completely digital approach offers the prospect of a number of significant improvements, a new digital multifrequency-shift-keying (MFSK) modem has been developed that employs a novel digital processing procedure termed code-assisted bit synchronisation (CABS). Signal detection is achieved via a set of noncoherent correlators, whilst symbol synchronisation and error correction are performed using a soft-decision Viterbi decoder. Practical tests of the modem show that it operates effectively under both additive white Gaussian noise and real HF channel conditions.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||
Journal or Publication Title: | ELECTRONICS & COMMUNICATION ENGINEERING JOURNAL | ||||
Publisher: | IEE-INST ELEC ENG | ||||
ISSN: | 0954-0695 | ||||
Official Date: | April 1992 | ||||
Dates: |
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Volume: | 4 | ||||
Number: | 2 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 73-82 | ||||
Publication Status: | Published |
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