Method and apparatus for estimating the current signal-to-thermal noise ratio and signal-to-pulse noise ratio

An apparatus to measure signal-to-thermal noise ratio (SNR) and signal-to-pulse noise ratio (SPNR) of an incoming input radio signal, the apparatus comprising:

• a pulse noise reduction unit, an SNR estimation unit and an offset compensation unit, connected in series,
• a pulse noise separation unit, and an SPNR estimation unit connected series,
• wherein the pulse noise separation unit includes:
• (i) a first low pass filter (LPF), an impulse noise separator and a high pass filter (HPF), connected in series;
• and
• (ii) a second LPF, a pulse noise detection unit and an inverter, connected in series, wherein the pulse noise detection unit includes two channels, each channel having a high pass filter, an absolute value calculation unit, a low pass filter, a comparator, and a pulse generator, connected in series, with outputs of the channels connected to an OR gate, the OR gate outputting a pulse detection signal,
• the pulse noise reduction unit and the pulse noise separation unit inputting an in-phase component and a quadrature component of the input radio signal;
• the SPNR estimation unit inputting a filtered in-phase component of the input radio signal from the pulse noise reduction unit,
• wherein the offset compensation unit outputs a current SNR, and
• wherein the SPNR estimation unit outputs a current SPNR.