https://qooah.com/2011/12/05/carrier-iq-detector-%e5%bf%ab%e9%80%9f%e6%aa%a2%e6%9f%a5%e6%82%a8%e6%89%8b%e6%a9%9f%e6%9c%89%e5%90%a6%e8%a2%ab%e9%a0%90%e8%a3%9d-carrier-iq/