| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce a chip area by a time information acquisition device of a CDMA system. <P>SOLUTION: A time information acquisition device has a constitution including a high-frequency reception part for detecting orthogonally a reception signal and outputting a first detection signal and a second detection signal; and a base band part including a first matched filter circuit for outputting a first signal wherein a signal-to-noise ratio of the first detection signal is maximized, a second matched filter circuit for outputting a second signal wherein a signal-to-noise ratio of the second detection signal is maximized based on a prescribed second code, a synchronization determination circuit for outputting a reverse diffusion timing signal at the point of time when synchronization is determined from the first signal and the second signal, a reverse diffusion circuit for outputting reverse diffusion signals acquired by diffusing reversely the first detection signal and the second detection signal, and a phase correction circuit for correcting the phase of the reverse diffusion signal and outputting a data signal. The base band part inputs the data signal into at least either of the first matched filter circuit and the second matched filter circuit from the point of time when the reverse diffusion timing signal is outputted, and outputs a decoding signal. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
