Combining soft decisions in a weather band radio

A method comprising:

• receiving a sample of a frame of a specific area encoding (SAME) message;
• determining if the sample is of a first frame of the SAME message;
• writing the sample to an entry of a buffer if the sample is of the first frame;
• otherwise combining the sample with a buffered value in a corresponding entry of the buffer;
• and
• writing a result of the combining to the corresponding entry of the buffer.

A system comprising:

• an antenna to receive radio frequency (RF) signals including incoming weather band radio signals;
• an analog front end to receive the incoming weather band radio signals from the antenna, the analog front end including:
• an analog mixer to mix the incoming weather band radio signals with a controllable oscillator frequency to generate a complex downmixed signal;
• and
• an analog-to-digital converter (ADC) to convert the complex downmixed signal to a digital signal;
• a DSP coupled to the analog front end, wherein the DSP includes:
• a first demodulator to demodulate the digital signal to generate a first demodulated signal;
• a second demodulator to receive the first demodulated signal and to obtain weather band data therefrom, wherein the second demodulator includes:
• an interpolator to receive samples of multiple frames of a message and generate soft decisions therefrom;
• and
• a combiner to combine the soft decisions of the multiple frames into a hard decision corresponding to a bit of the weather band data.