Patent ID: 8810449

Claim:
A satellite radio receiver for acquiring satellite signals transmitted from positioning satellites via radio waves, the satellite radio receiver comprising: a receiver for receiving the radio waves in a frequency band containing transmission frequencies of the satellite signals; a detection processor for concurrently performing predetermined processes for detecting the satellite signals from received radio signals in the radio waves received by the receiver to a predetermined number of two or more reception frequencies; an acquisition unit for (i) setting one reception frequency in turn at a first frequency interval over a first frequency range, (ii) allowing the detection processor to acquire a signal having the reception frequency as digital data having a first bit number, and (iii) detecting the satellite signals based on a result of the predetermined processes with the digital data; and a specifying unit for, in response to detection of the satellite signals by the acquisition unit, (i) concurrently setting the predetermined number of reception frequencies in turn at a second frequency interval narrower than the first frequency interval, (ii) allowing the detection processor to acquire the respective signals having the reception frequencies as digital data having a second bit number smaller than the first bit number, and (iii) specifying reception frequencies of the satellite signals based on the result of the predetermined processes that are concurrently executed with the predetermined number of digital data.