System and method for recovering a pilot tone in a local multipoint distribution system signal

DETAILED DESCRIPTION From the foregoing, it may be appreciated that a need has arisen for an effective and efficient pilot tone recovery system.
In accordance with the present invention, an improved system and method for recovering a pilot tone in an LMDS signal are provided which substantially eliminate or reduce disadvantages and problems associated with conventional pilot tone recovery systems.
According to an embodiment of the present invention, there is provided a method for recovering a pilot tone in an LMDS signal that includes receiving an intermediate frequency signal that contains a pilot tone frequency and removing frequencies surrounding the pilot tone frequency.
A pilot tone signal is then generated from the pilot tone frequency.
The frequency of the pilot tone signal is then divided by a specified number and compared to a stable frequency signal to determine a frequency difference between the divided pilot tone signal and the stable frequency signal.
An output frequency of a voltage controlled oscillator is adjusted based on the frequency difference.
A system frequency signal is then downconverted to the intermediate frequency signal.
The present invention provides various technical advantages over conventional pilot tone recovery systems.
For example, one technical advantage is providing an improved system and method for recovering a pilot tone in an LMDS signal.
In particular, the pilot tone recovery system utilizes components capable of fabrication on a monolithic integrated circuit.
In addition, the pilot tone recovery system improves the signal to noise ratio of the received pilot tone.
Other technical advantages may be readily apparent to one skilled in the art from the following figures, description, and claims.