Backward-compatible signal variations for data augmentation

A non-transitory computer readable storage medium having stored thereon a set of instructions for receiving an augmented data rate global navigation satellite system transmission that when executed by a computing device, cause the computing device to:

• generate an expected data sequence;
• generate a subcarrier waveform;
• apply a first dithering scheme to a first portion the generated subcarrier waveform based on a first data, wherein the first portion includes a plurality of sub-portions, and wherein the first dithering scheme includes shifting a first sub-portion of the first portion of the generated subcarrier waveform in time in a first direction;
• apply a second dithering scheme to the first portion of the generated subcarrier waveform, wherein the second dithering scheme includes shifting the first sub-portion of the first portion of the generated waveform in time in a second direction;
• generate a first matched filter based on the expected data sequence and the first subcarrier waveform dithering pattern;
• generate a second matched filter based on the expected data sequence and the second subcarrier waveform dither pattern;
• receive a transmitted signal;
• apply the first matched filter to the received transmitted signal to generate a first demodulated signal;
• apply the second matched filter to the received transmitted signal to generate a second demodulated signal;
• and
• compare the first demodulated signal and the second demodulated signal to determine whether the received transmitted signal included the first dithering pattern or the second dithering pattern.

A computing system comprising:

• one or more processors, the one or more processors configured to:
• generate an expected data sequence;
• generate a subcarrier waveform;
• apply a first dithering scheme to a first portion the generated subcarrier waveform based on a first data, wherein the first portion includes a plurality of sub-portions, and wherein the first dithering scheme includes shifting a first sub-portion of the first portion of the generated subcarrier waveform in time in a first direction;
• apply a second dithering scheme to the first portion of the generated subcarrier waveform, wherein the second dithering scheme includes shifting the first sub-portion of the first portion of the generated waveform in time in a second direction;
• generate a first matched filter based on the expected data sequence and the first subcarrier waveform dithering pattern;
• generate a second matched filter based on the expected data sequence and the second subcarrier waveform dither pattern;
• receive a transmitted signal;
• apply the first matched filter to the received transmitted signal to generate a first demodulated signal;
• apply the second matched filter to the received transmitted signal to generate a second demodulated signal;
• and
• compare the first demodulated signal and the second demodulated signal to determine whether the received transmitted signal included the first dithering pattern or the second dithering pattern.