Embedded time of day receiver for clock transmission

In a receiver receiving a single input signal that includes a first signal at a first frequency modulated by data representing an encoded phase difference between a first phase of the first signal at the first frequency and a second phase of a second signal at a second frequency, a method for extracting the first signal and the second signal from the single input signal, the method comprising:

• receiving the single input signal;
• generating a recovered first input signal from the received single input signal by extracting and phase locking the first signal with respect to the phase of a local clock internal to the receiver;
• decoding over a decode frame time the data representing an encoded phase difference at the start of the decode frame time between the first signal and the second signal for both a current decode frame time and an immediately prior decode frame time;
• generating a phase difference between the first signal and the second signal as a function of decoded data representing an encoded phase difference at the start of a current decode frame time and decoded data representing an encoded phase difference at the start of an immediately prior decode frame time;
• subtracting the generated phase difference from the phase of the generated recovered first signal to obtain a recovered second phase of the second signal;
• and
• generating a recovered second signal by phase locking a signal at the second frequency at the recovered second phase.