A serial tone ECCM modem for HF channels

Author

Wadsworth, Michael A. ; Vester, Walter C.

Author_Institution

RF Commun. Div., Harris Corp., Rochester, NY, USA

Volume

2

fYear

1997

fDate

2-5 Nov 1997

Firstpage

1041

Abstract

An HF ECCM modem based on a slow-hopped serial tone waveform has been developed at the RF Communications Division of the Harris Corporation. The waveform is based on a PN-spread PSK signal format and employs convolutional forward error correction and interleaving. The receive signal processing utilizes data-directed channel equalization, soft-decision-based Viterbi decoding, and narrowband interference excision to provide an HF ECCM capability with performance near that of fixed frequency serial tone modems. This paper presents initial design goals, an implementation overview of both the synchronization and data-passing aspects of the ECCM modem, and final modem performance

Keywords

Viterbi decoding; convolutional codes; electronic countermeasures; equalisers; forward error correction; interference suppression; interleaved codes; military communication; modems; phase shift keying; radiofrequency interference; spread spectrum communication; synchronisation; HF channels; Harris Corporation; PN-spread PSK signal format; RF Communications Division; convolutional forward error correction; data-directed channel equalization; data-passing; implementation; initial design; interleaving; narrowband interference excision; receive signal processing; serial tone ECCM modem; slow-hopped serial tone waveform; soft-decision-based Viterbi decoding; synchronization; Convolution; Electronic countermeasures; Forward error correction; Hafnium; Interleaved codes; Modems; Phase shift keying; Radio frequency; Signal processing; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

MILCOM 97 Proceedings

Conference_Location

Monterey, CA

Print_ISBN

0-7803-4249-6

Type

conf

DOI

10.1109/MILCOM.1997.646775

Filename

646775