Fixed wireless node with frequency synthesizer
AssigneeVerizon Patent and Licensing Inc.
InventorsJoseph Thaddeus Lipowski, Dimitar Stoilov Dimitrov, Jesse Lloyd Rhodes
Life of this patent
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Abstract
A high frequency data network access system includes an aggregation node and endpoint nodes that employ an approach to achieve frequency stability without the need for a separate auxiliary radio frequency (RF) signal, such as a GPS signal, which would require its own receiver and antenna. The endpoint and/or subscriber nodes derive the timing and frequency stability, and specifically disciplines a local reference oscillator and local reference time base.
Claims16
A method for frequency synchronization of a node in a millimeter wave fixed wireless access network, the method comprising:
- downconverting frequency of an input signal to an intermediate frequency (IF);
- amplifying the downconverted IF signal to an amplified signal using a variable gain amplifier;
- converting the amplified signal into a digital signal, using an analog to digital converter (ADC);
- correlating the digital signal with a delayed input signal to form a correlated output signal;
- and
- feeding the correlated output signal to a frequency synthesizer, for the frequency synchronization of the terminal devices in the millimeter wave fixed wireless access network.
A node in a millimeter wave fixed wireless access network, comprising:
- mixer for up converting intermediate frequency signals from a modem to high frequency signals for transmission to an aggregation node and for down converting high frequency signals received from an aggregation node to intermediate frequency signals for the modem;
- a variable gain amplifier is configured to amplify intermediate frequency signals to an amplified signal;
- an analog-to-digital converter (ADC) configured to convert the amplified signal to a digital signal;
- a correlator for processing the digital signal with a delayed input signal to form a correlated output signal;
- and
- a frequency synthesizer for generating a local oscillator signal for the mixer based on the correlated output signal.
Dependencies are inferred from the claim text.