GNSS receiver correlating doppler derotation samples with code phases

A global navigation satellite system (GNSS) receiver, the GNSS receiver comprising:

• at least one buffer configured to store a plurality of samples corresponding to a signal, each sample of the plurality of samples associated with a sample bit representation;
• and
• at least one correlator block, the at least one correlator block comprising
• a Doppler derotation block configured to receive the plurality of samples from the at least one buffer and perform Doppler derotation corresponding to at least one Doppler frequency on the plurality of samples,
• a bit accumulating block capable of accumulating bit at a first position within each sample bit representation of the plurality of samples subsequent to Doppler derotation corresponding to a Doppler frequency of the at least one Doppler frequency,
• a register array configured to be loaded with the plurality of samples corresponding to the Doppler frequency,
• a correlator engine configured to generate correlation results for the plurality of samples in the register array by
• generating partial correlation results by correlating remaining bits within each sample bit representation with a plurality of code phases for at least one GNSS satellite, and
• adding bits accumulated by the bit accumulating block to the partial correlation results, and
• a correlator processing block configured to perform at least one of a coherent accumulation and a non-coherent accumulation of the correlation results;
• and
• at least one memory configured to store the at least one of the coherent accumulation and the non-coherent accumulation of the correlation results.

A method comprising:

• storing a plurality of samples corresponding to a signal;
• performing Doppler derotation corresponding to at least one Doppler frequency on the plurality of samples;
• performing a multiple level quantization of the plurality of samples, the multiple level of quantization of the plurality of samples associating each sample with a sample bit representation;
• accumulating bit at a first position within each sample bit representation of the samples prior to generating of the correlation results;
• and
• generating correlation results by correlating the Doppler derotated samples corresponding to each Doppler frequency of the at least one Doppler frequency with a plurality of code phases for at least one GNSS satellite.