Automatic modulation mode selecting unit and method for modems

Details Automatic modulation mode selecting unit and method for modems Automatic modulation mode selecting unit and method for modems

1995-04-13

1996-08-27

Tse, Young T.

Pulse or digital communications

Miscellaneous

375222, H04L 2300

Patent

active

055508812

ABSTRACT:
An automatic modulation mode selecting unit (208) and a method (100) provide for selection from a plurality of modulation modes having an optimized transmission time for a data file. This is particularly useful where a small data file is to be transmitted, such as for a hand-held message pad. The present invention may select a modulation mode having a slow data rate but a short training time to achieve a shorter transmission time a small data file in comparison with using another modulation mode having a fast data rate but a longer training time, and thus a longer transmission time. The automatic modulation mode selecting unit includes a mode select controller (202), a mode computer (204), and a mode-select switch (206) for selecting a modulation mode based on a calculated optimized transmission time.

REFERENCES:
patent: 4425665 (1984-01-01), Stauffer
patent: 4931250 (1990-06-01), Greszczuk
patent: 5317594 (1994-05-01), Goldstein
patent: 5349635 (1994-09-01), Scott

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