Digital amplitude modulation apparatus

Details Digital amplitude modulation apparatus Digital amplitude modulation apparatus

1990-06-06

1991-09-10

Grimm, Siegfried H.

Modulators

Amplitude modulator

Plural modulation

332167, 332170, 375 41, 375 43, 375 61, H03C 152, H03C 160

Patent

active

050477056

ABSTRACT:
A digital amplitude modulation apparatus for amplitude-modulating a digital carrier having a frequency fc by a digital modulating wave associated with a sampling frequency fs1, at a sampling frequency fs2, wherein the conditions m.times.fs1=fs2, and fc=n/4.times. fs2 are satisfied, where m is a positive integer (2, 4, 6, . . . ) and n is a positive integer (1, 3, 5, . . . ). A fold distortion relative to an original digital amplitude modulated wave is not generated even if a fold component elimination filter is not used.

REFERENCES:
patent: 4003002 (1977-01-01), Snijders et al.
patent: 4974236 (1990-11-01), Gurcan et al.

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