METHOD AND APPARATUS FOR REPRODUCING TIMING, AND A DEMODULATING APPARATUS THAT USES THE METHOD AND APPARATUS FOR REPRODUCING TIMING

摘要

Two A/D converters sample received base band signal Sb by asynchronous sampling clock at double speed of symbol rate, and based on the sampled data series I i, Q i. A transmission complex symbol frequency generator generates data series E i, D i of transmission complex symbol frequency component. A correlation value calculator outputs correlation data series SM i as the correlation value of cosine wave data series C i, and data series E i, D i of symbol frequency generated by a cosine wave generator, based on the asynchronous sampling clock CK. An inverse tangent calculator outputs a timing error z based on the correlation data series SM i.