搜索 - 科创

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VHF/UHF窄带SDR，音频IQ方案的。在这里发过第一版的DSP板的图 https://www.kechuang.org/t/44885 第二版改用了STM32F4，其他部分也有简化，把射频和基带做...

之前用SDR在业余波段经常收到一些奇怪的频率不断增加的信号，见我前篇帖子。后面坛友分析可能是电离层探测的信号，这一类信号被称为chirp信号，以chirp信号为关键字也能在网上搜到很多论文。前一篇帖子...

之前一直想买个性能好一点的SDR平台，但是苦于价格都太高，就萌生了自己做个成本比较低的SDR平台的想法，但一直没有动手。直到前个星期，我用电视棒改装收中，短波段时把I通道的一个电容的焊盘...

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