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US 2014/0064347 A1Published application
Systems and methods for carrier phase recovery
AssigneeThe Boeing Company
InventorsLeonard Alan Plotke, Ramin Nobakht
Life of this patent
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Abstract
Systems and methods for carrier phase recovery are provided. One method includes providing a reference signal, detecting an input signal and determining a Signal to Noise Ratio (SNR) of the input signal. The method also includes employing a Minimum Mean Square Error (MMSE) algorithm based on the SNR to determine a Carrier Phase Recovery Loop (CPRL) bandwidth.
Claims21
A method to determine a Carrier Phase Recovery Loop (CPRL) bandwidth, the method comprising:
- providing a reference signal;
- detecting an input signal;
- determining a Signal to Noise Ratio (SNR) of the input signal;
- and
- employing a Minimum Mean Square Error (MMSE) algorithm based on the SNR to determine a CPRL bandwidth.
2 more elements
A demodulator comprising:
- an adaptive Carrier Phase Recovery Loop (CPRL) having,
- a Phase-Locked Loop (PLL) configured to detect an input signal;
- and
- a Minimum Mean Square Error (MMSE) module configured to receive as an input phase error vectors based on a phase component of a reference signal and a phase component of the input signal, the phase error vectors defining a mean-squared error, the MMSE module further configured to determine a CPRL bandwidth using the mean-squared error.
1 more element
A communication system comprising:
- a transmitter configured to transmit a modulated signal;
- a receiver configured to receive the modulated signal;
- and
- a demodulator configured to demodulate the received modulated signal, the demodulator including,
- an adaptive Carrier Phase Recovery Loop (CPRL) having,
- a Phase-Locked Loop (PLL) configured to detect an input signal;
- and
- a Minimum Mean Square Error (MMSE) module configured to receive as an input phase error vectors based on a phase component of a reference signal and a phase component of the input signal, the phase error vectors defining a mean-squared error, the MMSE module further configured to determine a CPRL bandwidth using the mean-squared error.
5 more elements
Dependencies are inferred from the claim text.