Digital modulation quality monitor

Details Digital modulation quality monitor Digital modulation quality monitor

1981-11-23

1984-05-15

Griffin, Robert L

Pulse or digital communications

Repeaters

Testing

375 39, 329112, H03K 1332

Patent

active

044492227

ABSTRACT:
A quality monitoring technique and detector is provided for checking the accuracy of modulation performed by a digital transmitter. The monitoring is performed without using a full receiver nor otherwise fully demodulating the signal to recover the baseband data. The modulated signal output by the transmitter is partially demodulated to a partial signal set on a single dimension of a two dimensional modulated signal matrix. The baseband signal is translated in accordance with a predetermined mapping format into the partial signal set on the single dimension for correlation against the partially demodulated signal. Failure to correlate indicates an error.

REFERENCES:
patent: 3341776 (1967-09-01), Doelz
patent: 3588349 (1971-06-01), Kawai
patent: 3761825 (1973-09-01), Hill
patent: 4095187 (1978-06-01), Yoshida
patent: 4317206 (1982-02-01), Nossen

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