Noise injection circuit and method for signal processing

A signal processor circuit adapted to operate in a window function mode and a window-finite impulse response mode, the signal processor circuit comprising:

• a multiplexer adapted to receive an input signal and a processed input signal;
• a first processor having two or more processing streams, wherein the first processor is adapted to receive the input signal or the processed input signal, and wherein the first processor is adapted to sample the input signal or the processed input signal at two or more sampling rates to identify signal peaks, and wherein the first processor determines signal peak location information for the signal peaks;
• a magnitude determination circuit operatively coupled to the first processor to determine magnitude information for the signal peaks;
• a second processor that identifies the signal peaks in a time range and provides a gain ratio for the signal peaks in the time range, wherein the signal processor circuit uses cancellation pulse information derived at least in part from a first window function when operating in the window function mode, and wherein the signal processor circuit uses cancellation pulse information derived at least in part from a second window function and at least in part from a finite impulse response filter when operating in the window-finite impulse response mode;
• a memory circuit adapted to store and dynamically allocate the cancellation pulse information to the input signal or the processed input signal for at least one of the window function mode and the window-finite impulse response mode;
• and
• an assembler that is adapted to combine the cancellation pulse information with the input signal or the processed input signal.