两部手机可以像雷达/声纳一样发挥作用吗？
我想知道是否有可能让两部手机像雷达/声纳设备一样相互交互，以便能够找到彼此或在 500 码左右的范围内准确定位？另外，是否有一种方法可以在没有 GPS 或连接到手机信号塔的情况下实现这一点（例如在室内或在沙漠中）？手机中是否有任何技术可以从彼此的链路雷达上反弹，基本上不需要 GPS/手机信号塔三角测量来找到对方？我正在尝试创建一个类似于捉鬼敢死队的心电图仪的有趣应用程序:-)
I was wondering if it were possible to have two cellphones interact with one another like a radar/sonar device to be able to find one another or be accurate within maybe 500 yards or so? Also, if there is a way to do it without the GPS or connecting to a cell tower (like being indoors or out in a desert)? Are there any technologies resident in a cellphone that can bounce off each other link radar to find one another basically without the need for gps/cell tower triangulation? Im trying to create a fun app similar to the Ghostbuster's EKG Meter :-)
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Wifi Direct 的传输距离比蓝牙更远，并且传输数据速度更快 http://developer.android .com/guide/topics/wireless/wifip2p.html
但是 500 码对于当前手机中的技术来说似乎太远了。
Wifi direct can reach further than Bluetooth and also transmit data faster http://developer.android.com/guide/topics/wireless/wifip2p.html
But 500 yards seems to be too far for the technology reside in the current mobile phone.
不会。
即使尝试了一部手机可能连接到另一部手机的所有其他方式（蓝牙、自组织网络、无线网络...），您也没有计算距离的参考系。您不可能像使用声纳/雷达那样“ping”另一部手机，并从该 ping 中得出距离。您需要另一个固定点来导出距离，就像使用三角测量一样，或者使用 GPS 需要 2 个固定点。
抱歉..听起来不可行。
No.
Even going through all the other ways a phone could possibly connect to another phone(bluetooth, ad-hoc networking, wireless network...), you have no frame of reference to calculate distance. You couldn't possibly "ping" another phone, and derive distance from that ping like you could with sonar/radar. You need another fixed point to derive the distance like you could with triangulation, or 2 fixed points with GPS.
Sorry.. doesn't sound feasible.
您不能为此使用 Wifi 或蓝牙（这就是为什么在安装专业网络时，他们会建立建筑物的波传播模型）。声音也无法正常工作，因为 iPhone 中的采样率受到限制，如此处所述。
You can't use Wifi or Bluetooth for this (there is a reason why when installing a pro-network, they do wave propagation models of the building). Sound won't work also, as the sampling rates in iPhone are limited as explained here.