Transmission of a digital information signal having a specific f

Details Transmission of a digital information signal having a specific f Transmission of a digital information signal having a specific f

1997-05-07

1999-11-30

Hsu, Alpus H.

Multiplex communications

Duplex

Transmit/receive interaction control

375296, 375355, 375346, 375285, H04B 320, H04B 1500, H04L 2704, H04L 700

Patent

active

059954930

ABSTRACT:
A transmitter is disclosed for transmitting a digital information signal having a specific first sampling frequency (f.sub.s1) via a transmission medium. The digital information signal is lowpass filtered (10) and down sampled (12) so as to obtain a low frequency component of the digital information signal. This signal is transmitted via the transmission medium (TRM). Further the low frequency component is upsampled (22) and filtered (28) and subsequently subtracted (34) from the original digital information signal. The difference signal thus obtained is also transmitted.

REFERENCES:
patent: 4468794 (1984-08-01), Waters et al.
patent: 4995057 (1991-02-01), Chung
patent: 5504785 (1996-04-01), Becker et al.
patent: 5577027 (1996-11-01), Cheng
patent: 5583887 (1996-12-01), Murata et al.
patent: 5612975 (1997-03-01), Becker et al.

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