Equipment for generating a transmit signal from first and second

Details Equipment for generating a transmit signal from first and second Equipment for generating a transmit signal from first and second

1995-06-05

1996-12-31

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

375281, 375308, 332103, H04L 512, H04L 2302

Patent

active

055901557

ABSTRACT:
A transmitting equipment includes a holding circuit for dividing a time-series digital signal into I and Q digital signals, holding the I and Q digital signals, and outputting them in parallel, a waveform forming circuit, having a memory for storing a plurality of oversampling codes corresponding to the I and Q digital signals, for reading the oversampling codes out of the memory and outputting them as I and Q waveform forming signals, a modulation circuit for orthogonally modulating the I and Q waveform forming signals output from the waveform forming circuit and outputting I and Q modulated signals, an addition circuit for adding the I and Q modulated signals output from the modulation circuit and outputting I and Q sum signals, a filter for removing high-frequency components from the I and Q sum signals output from the addition circuit, and a transmitting signal generation circuit for adding the I and Q sum signals from which the high-frequency components are removed by the filter and generating a transmitting signal.

REFERENCES:
patent: 4613976 (1986-09-01), Sewerinson et al.
patent: 4962510 (1990-10-01), McDavid et al.
patent: 5225795 (1993-07-01), Iinuma
patent: 5255288 (1993-10-01), Ichihara
patent: 5303412 (1994-04-01), Kushner
patent: 5379322 (1995-01-01), Kosaka

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