| 摘要 |
<p>For example, with a PLL (Phase-Locked Loop), performance of an identification device is dependent on the design method of the loop filter. A new identification device is proposed for identifying the frequency and phase of an oncoming wave without using a loop filter. With the oncoming wave as an input signal, a frequency ?i and a phase ?i which have been identified immediately before by an oscillator (3) are generated by oscillation, the phase is adjusted by a phase shifter (5), multiplication by the input signal is performed by a multiplier (7), and high-frequency components are removed by an integrator (9). In addition, by way of a simultaneous estimator (11), by solving a system of equations related to frequency difference and phase difference using Newton's method, it is possible to identify the frequency and phase of the oncoming wave simultaneously.</p> |
