Diversity receiver for FM stereo utilizing a pilot tone multiple for phase alignment of received signals
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 14, 1996
Grant Date -
N/A
app pub date -
Sep 29, 1994
filing date -
Sep 29, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An FM stereo receiving system and a method for aligning phases of RF signals received by multiple antennas. The FM stereo receiving system includes two antennas for receiving RF signals having a common frequency but potentially different phases. The system also includes an FM receiver having a detector output and a pilot output on which a pilot tone, such as a 19 kHz pilot tone, is present. A summer is included in the system for summing the RF signals and providing the summed signal to the receiver. The amplitude modulator of the system resides between one of the antennas and the summer to amplitude modulate the antenna's RF signal at a perturbation frequency which is a whole number multiple greater than 1 of the pilot tone. The receiver thus produces on its phase detector output a phase signal having a frequency equal to the perturbation frequency and a magnitude corresponding to the phase error between the RF signals which is connected in a feedback loop to align the phases.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully