Serial minimum shift-keyed modem

Pulse or digital communications – Repeaters – Testing

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375 64, 375 90, 332 16R, H04L 2710

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active

046566465

ABSTRACT:
An apparatus and method is disclosed of an SMSK/2 device that provides an additional phase state, and having at least three phase changes possible per bit period, as compared with standard SMSK/2 devices. The additional phase state increases the bit time needed for the signals to remerge which increases the euclidean distance defined by the remergence paths. The increase in euclidean distance provides an improved power efficiency and bit error rate (BER).

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Ryan et al., "760 Mbit/s Serial MSK Microwave Modem", IEEE Transactions on Communications, vol. COM-28, No. 5, May 1980.
Li et al., "Digital Modulator for Minimum Shift Keying", IBM Technical Disclosure Bulletin, vol. 21, No. 9, Feb. 1979.

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