| Autor: |
Kaur, D., Fernandes, P.J., Eugene, L.P., Kwatra, S.C. |
| Předmět: |
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| Zdroj: |
International Journal of Electronics; Dec92, Vol. 73 Issue 6, p1149, 16p |
| Abstrakt: |
An implementation is presented of digital demultiplexing and demodulation algorithms for an advanced satellite communication system on a hypercube. The mapping on a hypercube provides the high speed necessary for processing hundreds of single channel per carrier/frequency division multiple access (SCPC/FDMA) voice/data channels. Data demultiplexing and demodulation are parts of the recovery of the transmitted digital data in a MODEM. A demultiplexer comprises a filter bank followed by the computation of FFT. A demodulator primarily consists of circuits to recovery carrier signal, clock frequency and data. The computation of FFT on a hypercube is well established (Hwang and Briggs 1984). Therefore, this paper analyses the filter bank and carrier and data recovery algorithms to find an efficient mapping in a multiprocessor environment connected in a hypercubic configuration. A few models to implement these algorithms on a hypercube are provided. Comparison of the speed-up achieved on a hypercube versus that on a sequential computer is provided for the three models. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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