Patent ID: 8437435
Filing Date: 2013-05-07
Classification: G01S,H04B

Abstract:
1. A signal processing method for correlation computation between received signal samples, a code replica, and a carrier replica, comprising: mapping received signal samples from a numeric range of the received signal samples into a range of unsigned integers having a same number of bits as the received signal samples; separating bits of mapped N-bit sample sequences into at least N sequences of bits that are ordered from a most significant bit to a least significant bit, and giving a multiplier to each sequence of bits based on bit position in the mapped sample sequence; performing at least one exclusive-or (XOR) operation between a sequence of bits and the code replica over a predetermined number of samples; counting a number of bits having a value 1 in a result of the X©R operation, multiplying the number of bits having a value 1 with the given multiplier of the sequence of bits, and summing products resulting from each sequence of bits for which the XOR operation is performed; remapping a sum of the products back into the numeric range of the received signal samples; multiplying the remapped sum by the carrier replica; and accumulating a product of the multiplying the remapped sum by the carrier replica for an interval of at least a code epoch.