I found out that despite the fact that the tuner includes a demodulator, the I and Q outputs are available from the tuner. 我发现一事实,尽管这调谐器包含一个解调器,但是可从调谐器得到I和Q输出。
If I delay the demodulator* I may get the sound and image. 如果我延迟解调器的话,就能得到声音和画面。
Two kinds of PAD, based on analog and digital I/ Q demodulator respectively, have been constructed and tested in both laboratory and the klystron gallery of BEPCII linac. 矢量调制器芯片作为一种可以直接对载波同时进行幅度和相位调制的新型电路,是目前毫米波通信和雷达系统中的一个研究热点。
Demodulator controls the tuner by I 2C bus and magnifies the signal through AGC and CPU communicates with demodulator by SPI interface and control front receiving part. 信道解调器通过I2C总线对调谐器进行控制,对接收信号增益的放大通过AGC来调节,CPU通过SPI与信道解调器进行通讯,控制前端接收模块的运行状况。
The wideband I/ Q demodulator is one of the key devices for high-resolution SAR system. 宽带I/Q正交解调器是高分辨率SAR系统的关键部件之一。
The experimental results prove the wide-band I/ Q demodulator to be effective for high-resolution SAR system. 实验表明,该解调器用于高分辨SAR系统是有效的。
Because the Quadrature Demodulator brings different errors to I and Q signals, in this paper, I, Q imbalance is separated from system amplitude& phase errors and their correction methods are given respectively. 由于正交解调器给I、Q两路信号引入的误差不同,本文将I、Q不均衡与系统幅相畸变分离,分别讨论了各自的误差校正方法。
Experimental Study on Wideband I/ Q Demodulator for High-Resolution SAR System 高分辨率SAR宽带I/Q正交解调器的实验研究
And in the paper, I have analyzed the function and implementation performance of the tuner and demodulator. 文章中对选用的调谐器和解调解码芯片做了详细的性能和功能实现分析。