The utilization of high-coding-gain forward error correction (FEC) in Japanese satellite communications applications requires QPSK modems to have quite a low carrier cycle skipping rate and to capture and track over a very wide frequency at low Eb/N0. In order to meet these requirements, two unique techniques are proposed and discussed, namely, a low carrier cycle skipping rate and a wide AFC capture and hold range. Experimental results show that the proposed techniques meet the requirements and that the resulting 49-Mb/s modem works stably at an Eb/N0 of 3 dB.
|Number of pages||6|
|Journal||Conference Record - International Conference on Communications|
|Publication status||Published - 1986 Dec 1|
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering