Frequency-division multiple access (FDMA) and single channel per carrier (SCPC) in the uplink and time-division multiplexing (TDM) in the downlink are employed in the system described. To interface FDMA in the uplink and TDM in the downlink, multicarrier demodulation (MCD) is required onboard the satellite. The operation of the onboard MCD is the separation of each individual channel and subsequent demodulation. The results, which concern onboard frequency demultiplexing and demodulation for low-bit-rate carriers, are constrained by the requirement that new-generation payloads could serve the stations already active in the INTELSAT Business System. A digital hardware design that implements an MCD that can process three channels at 4.4 Mb/s or 12 channels at 1.1. Mb/s is described. The test results confirm the MCD feasibility, and further improvements are expected from a semicustom implementation.
A MULTIRATE DIGITAL MULTICARRIER DEMODULATOR: DESIGN, IMPLEMENTATION AND PERFORMANCE EVALUATION / Ananasso, F.; Chiassarini, G.; DEL RE, Enrico; Fantacci, Romano; Rousset, D.; Saggese, E.. - In: IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS. - ISSN 0733-8716. - STAMPA. - 10:(1992), pp. 1326-1342.
A MULTIRATE DIGITAL MULTICARRIER DEMODULATOR: DESIGN, IMPLEMENTATION AND PERFORMANCE EVALUATION
DEL RE, ENRICO;FANTACCI, ROMANO;
1992
Abstract
Frequency-division multiple access (FDMA) and single channel per carrier (SCPC) in the uplink and time-division multiplexing (TDM) in the downlink are employed in the system described. To interface FDMA in the uplink and TDM in the downlink, multicarrier demodulation (MCD) is required onboard the satellite. The operation of the onboard MCD is the separation of each individual channel and subsequent demodulation. The results, which concern onboard frequency demultiplexing and demodulation for low-bit-rate carriers, are constrained by the requirement that new-generation payloads could serve the stations already active in the INTELSAT Business System. A digital hardware design that implements an MCD that can process three channels at 4.4 Mb/s or 12 channels at 1.1. Mb/s is described. The test results confirm the MCD feasibility, and further improvements are expected from a semicustom implementation.File | Dimensione | Formato | |
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A MULTIRATE DIGITAL MULTICARRIER DEMODULATOR DESIGN IMPLEMENTATION AND PERFORMANCE EVALUATION.pdf
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