1. A method for determining one or more fine-tuned estimates of delay value associated with a received signal, the method comprising the computer-implemented steps of: determining a range of delay values of interest associated with the received signal; interpolating fine-grained values for I and Q correlation integrals by using a subset of coarse-grained calculations of I and Q correlation integrals; and determining the one or more fine-tuned estimates of delay value based on the fine-grained values of I and Q correlation integrals.