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Title: Real-link performance of a SS-MC-MA high frequency radio modem
Authors: Santana Sosa, Héctor 
Raos, Ivana
Zazo-Bello, Santiago
Pérez-Álvarez, Iván A. 
López-Pérez, Javier 
UNESCO Clasification: 3325 Tecnología de las telecomunicaciones
Keywords: Equal Gain Combine
Parallel Interference Cancellation
Interference Cancellation Scheme
Real Link
Issue Date: 2006
Project: Modem Para Voz Digital Interactiva en Comunicaciones Ionosfericas. 
Conference: 5th International Workshop on Multi-Carrier Spread-Spectrum (MC-SS 2005) 
Abstract: The HF band data communication link has been traditionally desired by many of the large range transmission systems although it is associated to unfavorable performances as low transmission rate, large delay and low confidence in terms of link establishment and maintenance. Although transmission rates may be high enough to transmit digital voice, delay, usually over several second, has been the main handicap to let the systems provide interactive digital voice links. Indeed, there is no unclassified equipment with this capability. The main achievement of this proposal is that we are able to guarantee digital voice transmission with low latency, around 135 msec (modem+codec), providing a full interactive digital voice link. Performances of two new 2460 bps. HF modems are presented versus the 39-tone 2400 bps MIL-STD-188-110A modem, working over an ITU-R moderate channel. Futhermore, these results are corroborated by real tests carried out in a 1800 Km. link.
ISBN: 1402044356
Source: Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop, p. 137-144
Appears in Collections:Actas de congresos
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