Editing MPSK SNR Estimator Probe

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This is a probe block (a sink) that can be used to monitor and retrieve estimations of the signal SNR. This probe is designed for use with M-PSK signals especially. The type of estimator is specified as the  parameter in the constructor. The estimators tend to trade off performance for accuracy, although experimentation should be done to figure out the right approach for a given implementation. Further, the current set of estimators are designed and proven theoretically under AWGN conditions; some amount of error should be assumed and/or estimated for real channel conditions.
This is a probe block (a sink) that can be used to monitor and retrieve estimations of the signal SNR. This probe is designed for use with M-PSK signals especially. The type of estimator is specified as the  parameter in the constructor. The estimators tend to trade off performance for accuracy, although experimentation should be done to figure out the right approach for a given implementation. Further, the current set of estimators are designed and proven theoretically under AWGN conditions; some amount of error should be assumed and/or estimated for real channel conditions.
The estimator is normally placed before clock recovery.


The block has three output message ports that will emit a message every msg_samples number of samples.  These message ports are:  
The block has three output message ports that will emit a message every msg_samples number of samples.  These message ports are:  
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; Filter Alpha (''R'')
; Filter Alpha (''R'')
: The update rate of internal running average calculations.  Needs to be between 0 and 1, where higher value adjusts faster to new data.
: The update rate of internal running average calculations.


== Example Flowgraph ==
== Example Flowgraph ==

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