Systems and methods for removing variable dc offset of periodic analog signals

A signal processing system comprising:

• an input transmission line operable to provide an analog input signal to the signal processing system, the analog input signal comprising a direct-current (DC) component and an alternating-current (AC) component;
• a first reference measurement circuit coupled to the input transmission line, the first reference measurement circuit configured to generate a first measured peak signal based at least in part on the analog input signal;
• a second reference measurement circuit coupled to the input transmission line, the second reference measurement circuit configured to generate a second measured peak signal based at least in part on the analog input signal, the second measured peak signal being different from the first measured peak signal;
• a bias detection circuit coupled to the first reference measurement circuit and the second reference measurement circuit, the bias detection circuit configured to generate a bias signal based at least in part on the first measured peak signal and the second measured peak signal;
• and
• a bias removal circuit coupled to the bias detection circuit and the input transmission line, the bias removal circuit configured to generate an analog output signal based at least in part on the bias signal and the analog input signal, the analog output signal corresponding to the analog input signal having the DC component removed therefrom,
• wherein each of the first reference measurement circuit, the second reference measurement circuit, the bias detection circuit, and the bias removal circuit comprise one or more analog components.