| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a spread spectrum receiver capable of achieving synchronization processing in high speed without impairing communication efficiency.SOLUTION: A spread spectrum receiver includes: a spread code multiplication unit 40 that multiplies a reception signal by a complex conjugate of a spread code when receiving from a spread spectrum transmitter a signal obtained by multiplying a modulation signal having the same cycle regardless of transmission information and having different repetition patterns per transmission information by the spread code; a phase difference calculation unit 42 for calculating phase difference between chips within one symbol by using the signal after multiplying the complex conjugate of the spread code; an addition processing unit 43 for adding the phase difference between chips; a power calculation unit 45 for calculating a power value from the phase value between chips after addition; a determination unit 46 for determining spread code synchronization on the basis of the power value input from the power calculation unit 45 and information on a chip number corresponding to the power value; and a frequency calculation unit 47 for calculating a frequency offset on the basis of the determined result and the phase difference between chips.</p> |
