A GNSS receiver includes at least one buffer and at least one correlator block. The at least one buffer stores a plurality of samples corresponding to a received signal. The at least one correlator block includes a Doppler derotation block configured to perform Doppler derotation corresponding to at least one Doppler frequency on the plurality of samples, a register array configured to be loaded with the plurality of samples on Doppler derotation corresponding to a Doppler frequency of the at least one Doppler frequency, and a correlator engine configured to generate correlation results by correlating the plurality of samples in the register array with a plurality of code phases for at least one GNSS satellite. A presence of at least one GNSS satellite signal may be detected based on coherent accumulation and a non-coherent accumulation of the correlation results.