Channel separating filter apparatus, PSK demodulator apparatus a

Details Channel separating filter apparatus, PSK demodulator apparatus a Channel separating filter apparatus, PSK demodulator apparatus a

1997-01-17

1999-12-07

Tse, Young T.

Pulse or digital communications

Receivers

Angle modulation

375350, 370497, H04L 2722, H04B 110

Patent

active

059995750

ABSTRACT:
There is disclosed a channel separating filter apparatus for separating a frequency-multiplexed signal comprised of channel signals into respective channel signals. A frequency-converting section frequency-converts the frequency-multiplexed signal into a plurality of channel signals, so that an average value of carrier wave frequencies of two channel signals which are located in the center of the frequency-multiplexed signal and are adjacent to each other becomes substantially zero, and then outputs the plurality of frequency-converted channel signals. Thereafter, a channel separating section separates the plurality of frequency-converted channel signals outputted from the frequency-converting section into respective channel signals each having only a frequency component of each channel signal, thereby separating the frequency-multiplexed signal into at least two channel signals.

REFERENCES:
patent: 5226057 (1993-07-01), Boren
patent: 5289464 (1994-02-01), Wang
patent: 5490173 (1996-02-01), Whikehart et al.
patent: 5533050 (1996-07-01), Isard et al.
patent: 5627859 (1997-05-01), Parr
patent: 5812608 (1998-09-01), Valimaki et al.
patent: 5841811 (1998-11-01), Song
F. Takahata, (1987) "A PSK Group Modem for Satellite Communications" IEEE Journal on Selected Areas in Communication, vol. SAC-5(4):648-661, May 1987.

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