| 摘要 |
<p>PURPOSE:To detect an optimum correlation pulse extraction timing by discriminating a current maximum value timing based on not only the state of a past correlation pulse but also the state of a future correlation pulse. CONSTITUTION:Upon the receipt of a correlation pulse extraction timing from an output terminal 114, a correlation pulse extraction system 116 outputs the content of the timing to a correlation pulse input port 11613 according to the correlation pulse extraction timing from frame memories 11603,11604 storing an in-phase axis correlation pulse and from frame memories 11607,11608 storing an orthogonal phase axis correlation pulse. The content [X(i+1)] of the memory 11604 is outputted to output terminals 1171, 1191, the content [X(i)] of the memory 11603 is outputted to output terminals 1172,1192, the content [Y(i+1)] of the memory 11608 is outputted to output terminals 1181,1201, and the content [Y(i)] of the memory 11608 is outputted to output terminals 1182,1202. Thus, the discrimination of a current maximum timing is implemented by including not only the state of the past state of correlation pulse but also a future state of the correlation pulse.</p> |
