工具与资源blinry.org
用软件定义无线电能做的 50 件事（2024）
Things you can do with a Software Defined Radio (2024)
2024 — 2025，它一次次回到首页
黑点是上首页（≥ 50 分）的那次投稿，空心点是没冲上去的投稿，点越大分数越高。
导读
blinry 整理了 50 件可以用软件定义无线电（SDR）做的事情，从接收卫星图像、监听飞机和船舶信号到解码各种日常无线设备的数据，展示了廉价 RTL-SDR 加密狗的惊人潜力。文章在 2024 和 2025 两年都登上 Hacker News 首页，是 SDR 入门的经典清单。
为什么经久不衰：它把看似高深的无线电世界变成一份人人可上手的趣味清单，且内容持续更新，至今仍是 SDR 新手最好的灵感来源。
HN 评论精选
提醒读者文中接收 NOAA 卫星图像的项目已因卫星退役而失效
遗憾的是，NOAA 卫星图像现在基本收不到了。NOAA-15 和 19 已于 2025 年 8 月 19 日退役，NOAA 18 也在 6 月退役。据我所知，要接收新卫星的图像需要功率大得多的天线。不过 SDR 依然很好玩——意识到所有这些信息都以电磁波的形式存储着、无时无刻不在穿过我们的身体，实在令人惊叹。
megaloblasto查看英文原文
Sadly, you can't really get NOAA satellite images any more. NOAA-15 and 19 were decommissioned August 19, 2025, and NOAA 18 was decommissioned in June. It's my understanding that you'll need a much more powerful antenna to get images from the new satellites. Still, SDR is great fun. It's incredible to realize that all this information is stored in electromagnetic waves and passing through us all the time.
分享用 SDR 读取智能电表数据的实际经历及 v4 版驱动兼容性坑
几年前电力公司说要把我家的模拟电表换成智能电表，我一直想用 SDR 读取自己的用电数据。去年终于买了 RTL-SDR，结果发现我的电表并不通过 ISM 频段广播用电信息，最后只捕捉到了路过汽车的胎压传感器数据（挺酷，但不是我要的）。另外注意：现在买到的 RTL-SDR 多是 v4 版，它与 Ubuntu 24.04 仓库里的旧驱动不兼容，需要从 GitHub 安装最新驱动，否则会遇到一堆误导性的报错。
ComputerGuru查看英文原文
I was informed maybe 7 or 8 years back that my electric company would be replacing my analog meter with a smart one and always intended to try and glean more information about my electric consumption habits from it. It took me a lot longer than I intended, but last year I finally bought an RTL-SDR in the hopes of being able to get realtime info from the meter. Unfortunately, it seems that it's not one of the ones that emits consumption info over ISM bands for consumption by household appliances (so far as I can tell) and I ended up only capturing info from TPMS sensors off of passing cars (which was cool, but not really what I was looking for). Do note that if you purchase an RTL-SDR these days, you'll probably get a v4 which, at least as of last year, does not play out-of-the-box at all with the software available on the Ubuntu apt repos and the RTL-SDR drivers that ship with 24.04 out-of-the-box — there were some hardware protocol/interface changes between v3 and v4 that make the old drivers incompatible and you'll get a litany of misleading or non-specific errors if you try without downloading and installing the latest drivers from GitHub (or somewhere).
批评德国禁止接收海事无线电信号的规定
在德国不允许接收海上通信（清单第 49 条）实在太荒谬了。如果不想让人听到，那就别发射。
isoprophlex查看英文原文
Seems so idiotic that you're not allowed to receive maritime traffic in Germany (item #49). Don't transmit any, if you don't want people to receive it.
用 RTL-SDR 解码 VOR 导航信号的成功案例，并称赞其灵敏度
廉价的 RTL-SDR 加密狗加上一点时间和精力能做的事真是惊人。我用 GNU Radio 搭了一个接收流程图，解码并显示附近 VOR 飞机导航信标的信号，开车绕着它转、看指针实时更新，非常酷。这些设备的灵敏度达到普通接收机的水平（0.1 微伏），考虑到采样只有 8 位，这让我很惊讶。
mikewarot查看英文原文
Well, it is truly amazing what you can do with a cheap RTLsdr dongle and some time and energy. I used GNU Radio to build a receiver flowgraph that decodes and displays the signal from a nearby VOR aircraft navigation transmitter. It was cool to drive around it, and see the pointer update in real time. The sensitivity of these things is on the order of a normal receiver, (0.1 microVolts) which surprised me, knowing the samples are 8 bits.
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