Transmission signal processing apparatus

Details Transmission signal processing apparatus Transmission signal processing apparatus

1993-03-15

1996-12-10

Bocure, Tesfaldet

Pulse or digital communications

Equalizers

375295, 375377, 3647241, H03H 730, H04L 2704

Patent

active

055838871

ABSTRACT:
A roll off filter portion for an input transmission point signal executes a roll-off filtering process and an interpolation process with a multiple of two at the same time. The roll-off filtering process is adapted to form a frequency spectrum characteristic in a cosine roll-off shape for the input signal. An interpolator portion, connected to the roll-off filter portion, executes an interpolation process with a multiple of two. This process is a filtering process for forming a frequency spectrum characteristic in a cosine roll-off shape for an input signal. Depending on what multiple of the original sampling frequency a transmission point signal is interpolated, a corresponding number of the interpolator portions are connected in a cascade shape. when a plurality of channels of transmission point signals are modulated and multiplexed according to an FDM system, a corresponding number of signal processing systems are disposed according to the plurality of transmission point signals with different modulation rates.

REFERENCES:
patent: 4716472 (1987-12-01), McNally
patent: 5214676 (1993-05-01), Wilkinson
patent: 5253043 (1993-10-01), Gibson

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