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Can this Interferometric Reflectometry technique be done using just a cheap GPS module? As I understand it you'd need to get access to something like the raw IQ
by thatcherc 7y ago
Can this Interferometric Reflectometry technique be done using just a cheap GPS module? As I understand it you'd need to get access to something like the raw IQ samples coming out of the GPS analog-to-digital converter in order to determine the time difference between the true signal and the reflected one, which I wouldn't expect to be possible with a cheap integrated GPS - I'd love to hear it's possible though!
- jhayward 7y agoFrom a quick look at https://link.springer.com/article/10.1007/s10291-018-0744-8 https://link.springer.com/article/10.1007/s10291-018-0744-8 "At some level, all GNSS-IR studies are based on the analysis of SNR patterns created by the interference of direct and reflected (or multipath) GNSS signals." It appears they are using the effect that reflected signal has on the receiver's reported SNR value to impute multipath frequencies.