上行有線電視數位光纖傳輸系統:使用高速類比-類比轉換器將有線電視訊號數位化之技術

Abstract

本論文提出一個數位量化次載波多工系統，於影像、聲音與資料傳輸經由 雙向有線電視光纖網路，此項技術主要依靠使用一個高速類比至數位轉換 器,將混合組成之類比信號數位化。一般次載波多工被雙向有線電視系統 使用於 組成多頻道複合的影像、聲音和資料信號。量化、串列化傳輸以 及訊號重建 等過程將透過實際原型來解釋與說明。系統雜訊與線性度考 量須求亦被量測 與討論。 This thesis examines a quantized subcarrier multiplexing approach for transmission of video,voice, and data information over two-way CATV optical fiber networks . The basis of this technique is to utilize a single high-speed analog-to-digital converter to digitize a composited analog signal. Conventional subcarrier multiplexing methods are used to form the composite from multiple NTSC video, voice, data signals. The process of quantization, serialization, transmission, and waveform recovery is explored for an experimental prototype system. Noise performance and impact on linearity requirements are also investigated.