Modulators – Phase shift keying modulator or quadrature amplitude modulator
Patent
1995-01-27
1998-06-16
Dolinar, Andrew M.
Modulators
Phase shift keying modulator or quadrature amplitude modulator
H03C 100, H03C 300
Patent
active
057677506
ABSTRACT:
In a modulator, a linear converter inputs modulation signals and feed-back signals as an input vector and linearly converts the input vector. An encoder vector-quantizes the linearly converted vector and outputs the resultant signals as selection signals. A vector decoder decodes the encoded output into the plurality of feed-back signals. A selector selects and outputs one of signals with the same frequency and different phase or amplitude according to the selection signals.
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H. Inose, Y. Yasuda, J. Murakami, "A Telemetering System by Code Manipulation -.increment.-.SIGMA. Modulation," IRE Trans on Space Electronics and Telemetry, Sep. 1962, pp. 204-209.
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S. Jantzi, W. Snelgrove, P. Ferguson, Jr., "A Fourth-Order Bandpass Sigma-Delta Modulator, " IEEE Journal of Solid-State Circuits, vol. 28, No. 3 Mar. 1993.
"A Precise Digital Modulated Signal Generator", Masahiro Kuoroda, The 1991 Autumn Convention Thesis B-239 of The Institute of Electronics, Information, and Communication Engineers, (1991).
Dolinar Andrew M.
Kabushiki Kaisha Toshiba
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