Compensation of filters in radio transmitters

Details Compensation of filters in radio transmitters Compensation of filters in radio transmitters

2006-12-12

2006-12-12

Le, Lana (Department: 2618)

Telecommunications

Transmitter

C455S126000, C455S114200, C455S115100

Reexamination Certificate

active

07149482

ABSTRACT:
A radio transmitter for transmitting signals in a predetermined frequency band has a transmit filter and a compensating filter. The transmit filter filters a signal to be transmitted from the transmitter to suppress the transmission of parts of the signal outside the band. The compensating filter, e.g., operating in the digital domain, filters the signal upstream from the transmit filter, wherein the compensating filter is arranged to alter the signal to counteract at least one of a phase ripple, an amplitude ripple, and a group delay variation of the transmit filter within the band.

REFERENCES:
patent: 3891926 (1975-06-01), Ishman et al.
patent: 5058130 (1991-10-01), Park
patent: 6041083 (2000-03-01), Larsson et al.
patent: 6591090 (2003-07-01), Vuorio et al.
patent: 6853836 (2005-02-01), Asam et al.
patent: 6968163 (2005-11-01), Kuechler et al.
patent: 6973138 (2005-12-01), Wright
patent: 2001/0026196 (2001-10-01), Delano
patent: 2002/0160731 (2002-10-01), Hashimoto et al.
patent: 2003/0058959 (2003-03-01), Rafie et al.
patent: 2003/0092397 (2003-05-01), Uriu et al.
patent: 2003/0103579 (2003-06-01), Webster et al.
patent: 2004/0087280 (2004-05-01), Watanabe et al.
patent: 2004/0185795 (2004-09-01), Shamsaifar et al.
patent: 2004/0219891 (2004-11-01), Hadjichristos
patent: 2005/0026647 (2005-02-01), Li et al.
patent: 2005/0186920 (2005-08-01), Staszewski et al.
patent: 2006/0068726 (2006-03-01), Yamawaki

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