Patent ID: 8184742

Claim:
A Radio Frequency (RF) receiver having a timing offset recovery function, the RF receiver comprising: a preprocessing unit for sampling and digitalizing a received analog signal; a differential operation unit for delaying the digitalized signal received from the preprocessing unit for a predetermined period and differentiating the delayed signal; a correlation unit for correlating the differentiated signal received from the differential operation unit with a plurality of predetermined pseudo noise (PN) code sequences, and sequentially outputting correlation values; a setting unit for sequentially storing the correlation values, detecting a maximum value among the stored correlation values, and shifting a plurality of determination slots by a difference between a storage location of the detected maximum value and a predetermined reference storage location; and a demodulation value estimation unit for estimating, as a demodulation value of the received analog signal, a symbol of a PN code sequence corresponding to the maximum value from the shifted determination slots, wherein the setting unit comprises: a shift register having a plurality of storage locations including the storage location of the detected maximum value, for shifting the correlation values and sequentially storing the shifted correlation values at the storage locations, respectively; a detector including the determination slots, each of which is allocated for one or more of the storage locations, for detecting the storage location of the maximum value; and a slot setter for comparing the storage location of the maximum value from the detector with the predetermined reference storage location and shifting the determination slots by the difference therebetween.