Chapter 2 sets forth the structure of IF (Intermediate Frequency) digital Software Radio, the critical theory of Software Radio and the signal processing technique about it.
第二章介绍了中频数字化软件无线电的结构，并阐述了软件无线电的关键理论和软件无线电中的信号处理技术。
2
Direct sampling microwave radiometer (DSMR) is a digital radiometer of simple structure, which directly samples radiofrequency signals.
直接采样微波辐射计对射频信号直接采样，是一种结构简单的数字辐射计。
3
The Raman and FTIR spectra show that the structure and composition of the films change with the radio-frequency power.