Bit-slice microprocessors in h.f. digital communications

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Bit-slice microprocessors in h.f. digital communications

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A 2.4 kbit/s baseband modem is being designed for use at h.f., incorporating modulation/demodulation techniques that are matched to those frequencies and the problems associated with them. Fed by a continuous serial datastream, the modulator functions are implemented wholly by a bit-slice microprocessor, and controlled by another more conventional microprocessor. Analogue output waveforms are generated in a d/a converter, which is driven by the bit-slice machine. Demodulation is performed in a similar device, using an a/d input and giving a serial output.

Inspec keywords: modems; digital communication systems; data communication equipment

Other keywords: 2.4 kbit/s baseband modem; bit-slice microprocessor; HF digital communications

Subjects: Communications computing; Other data transmission; Other telecommunication terminals and equipment; Control applications in data transmission

References

    1. 1)
      • O. Brigham . (1974) , The Fast Fourier Transform.
    2. 2)
      • ‘Build a Microcomputer’, Advanced Micro Devices, Sunnyvale, Cal., 1979.
    3. 3)
      • Riley, G.I.: `Error Control for Data Multiplex Systems', 1975, Ph.D. Thesis, University of Kent at Canterbury.
    4. 4)
      • R.E. Ziemer , W.H. Tranter . (1976) , Principles of Communication Modulation and Noise.
    5. 5)
      • J. Gorski-Popiel . (1975) , Frequency Synthesis: Techniques and Applications.
    6. 6)
      • L.R. Rabiner , B. Gold . (1975) , Theory and Application of Digital Signal Processing.
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