RTL-SDR
內容表格
- 1. RTL-SDR
RTL-SDR
http://sdr.osmocom.org/trac/wiki/rtl-sdr
基於對DVB-T 電視棒Linux 下驅動編寫
http://thread.gmane.org/gmane.linux....61/focus=44461
OSMOCOM 發現最新便宜價廉軟體無線電硬體
RTL2832U 是一個應用SDR (軟體無線電的晶片) 非寫死調變演算法的 ASIC
RF tuner 為(64MHZ - 1700 MHz). (Maybe work in ~2000MHz 這樣才方便做GSM Sniffer)
沒壓縮的基頻取樣 (up to 2.8 MS/s 8-bit I+Q) 丟入電腦Gnu Radio 再做無線訊號處理
無法接受短波HF 頻帶(1．8MHz到29．7MHz)
解決方法 做塊版子
http://www.ct1ffu.com/site/hf-converter.pdf
I+Q 科普
BUG:取樣因為沒buffer問題 所以好像在硬碟會掉包 SSD或ramdisk 會比較理想
RTL2832U晶片規格
http://www.linuxtv.org/wiki/index.ph...alTek_RTL2832U
| Notes | |
|---|---|
| Resolution | 8 bits |
| Minimum sample rate | > 900 ksps (must be greater!) |
| Maximum sample rate | 3.2 Msps |
| Nominal sample rate | 1 Msps (much higher and subtle signal degradation) |
| Clock | 28.8 MHz internal oscillator (expect phase noise) |
| Spectrum flatness | (Definitely not flat at centre, worse with low gain) |
| AGC | Disabled for E4000, but still active somewhere (in demod?) |
| Sensitivity | TBD (decent all things considered) |
| Quality | Don't expect anything remotely close to USRP |
| Price |
討論
http://www.reddit.com/r/RTLSDR/
https://groups.google.com/forum/#!forum/sdr-widget
HDSDR
HDSDR 是Windows 下軟體無線電軟體 ,可搭配RTL-SDR做RF頻譜訊號檢測
How to
http://thenewtech.tv/community/dongular-deviation
http://users.on.net/~balint/HDSDR_install-2.11.exe
http://wiki.spench.net/wiki/USRP_Interfaces
GNU radio 教學
安裝gnu radio apt-get install gnuradio
取樣程式
sudo apt-get install libusb-1.0-0-dev
cd rtl-sdr
cd src
make
http://wiki.spench.net/wiki/Gr-baz#rtl_source_c