This dissertation chooses received directly system, at the same time makes the simple introduction to the heterodyne receiver, and then carries on the preliminary analysis on optical antenna.

• 本文选用的是直接检测接收机的实现方案，同时对外差接收机也做了简单介绍，并对光学天线的类型和各自的结构特点进行了初步的分析。