| 摘要 |
<p>The subject of the invention is a multi-channel system for direct Discrete Hilbert Transform (DHT) in PCM format (pulse-code modulation) based on a parallel structure. The system enables determination of all 2N + 1 output samples of DHT within time that does not exceed one sampling period T s of analogue/digital converter /4/ immediately after the last sample of input signal is received. It also enables the application of weighted impulse response (formule I) to ensure higher resolution of DHT. The system according to the invention wherein at input side, it has one analogue/digital converter /4/, with output parallelly connected to inputs of 2N+1 multiplication units /3-N/-/3N/ The second input of each multiplication unit is connected to specific output of the cyclic register /2/. The cyclic register has 2N + 1 outputs from which weight factors are collected. In each (formule II) channel, output of the multiplication unit /3j/ is connected with an individual input of each accumulator channel /5j/, where products of input signal samples and relevant weight factors are added. Finally, after processing 2N + 1 samples of input signal (formule III), complete DHT result (formule IV) appears at outputs of channel accumulators /5j/. A common element for all channels is controller (clock) /1/, whose signals come at ? s -1 frequency.</p> |
