There has been some additional development of parts reported in "Multi-Modulator for Bandwidth-Efficient Communication" (NPO-40807), NASA Tech Briefs, Vol. 32, No. 6 (June 2009), page 34. The focus was on 1) The generation of M-order quadrature amplitude modulation (M-QAM) and octonary-phase-shift-keying, trellis-coded modulation (8PSK TCM), 2) The use of square-root raised-cosine pulse-shaping filters, 3) A parallel-processing architecture that enables low-speed [complementary metal oxide/semiconductor (CMOS)] circuitry to perform the coding, modulation, and pulse-shaping computations at a high rate; and 4) Implementation of the architecture in a CMOS field-programmable gate array.


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    Titel :

    Parallel-Processing CMOS Circuitry for M-QAM and 8PSK TCM


    Beteiligte:
    Gray, Andrew (Autor:in) / Lee, Dennis (Autor:in) / Hoy, Scott (Autor:in) / Fisher, Dave (Autor:in) / Fong, Wai (Autor:in) / Ghuman, Parminder (Autor:in)


    Erscheinungsdatum :

    2009-09-01


    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch





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