Multicarrier demodulator

Details Multicarrier demodulator Multicarrier demodulator

1988-03-04

1989-11-14

Griffin, Robert L.

Multiplex communications

Wide area network

Packet switching

H04L 506, H04L 2700, H04J 100

Patent

active

048812226

ABSTRACT:
The present invention relates to a multicarrier demodulator for separating and demodulating a digitalized frequency multiplexed signal into a plurality (L) of individual channel signals, with the separation being performed using a frequency division demultiplexer (FDM). The separated channel signals are each filtered using bandwidth limitation filters and thereafter demodulated using a synchronous demodulator. Following demodulation, the signals are filtered by interpolation filters, data (Nyquist) filters, and subsequently decided upon in a decider. The invention is characterized by the fact that the demodulator operates upon a pair of phase displaced complex channel signals.

REFERENCES:
patent: 3906347 (1975-09-01), Motley et al.
patent: 4785447 (1988-11-01), Ichiyoshi
patent: 4792943 (1988-12-01), Gockler

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