1. A method of determining a data rate at which data is encoded within a digital signal, the method comprising: selecting an assumed data rate at which data may be encoded within the digital signal; determining a syndrome of the digital signal for the assumed data rate; determining a confidence metric related to the syndrome of the digital signal; comparing the confidence metric to a threshold; and producing an indication that the assumed data rate is the data rate at which data is encoded within the digital signal if the confidence metric satisfies the threshold.