| 摘要 |
<p>PURPOSE:To constitute a correlator with a digital circuit without using a digital circuit equivalent to a voltage control clock oscillator. CONSTITUTION:Multipliers 20 and 21 multiply an input signal r(t) by cosomegat and sinomegat. Data are inputted to A/D converters 25 and 26 through LPF 22 and 23, and are A/D-converted by the clock of a clock generator 32. The A/D conversion output is added to correlators 27 and 28. The correlators 27 and 28 correlate a reference PN code from PNG 31, and the correlation output is synthesized in a synthesis circuit 29 and is outputted.</p> |
