利用定向天线，这种设备发射数据到远在60英里外的接收天线。

Using a directional antenna, the device shoots data to a receiving antenna as far as 60 miles away.

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由于复杂、未知且连续的多输入多输出信道系数值，使得接收器尽可能准确地恢复发射数据成为一项挑战性的工作。

Due to the complex, unknown, and continuous valued MIMO channel coefficients, the work of receiver recovering the transmitted data as correct as possible becomes a challenge work.

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威斯康星州的研究人员用安装在脚后跟的无线发射机取代了需要塞进鞋子里的数据线。

Rather than plugging a cable into a shoe, the Wisconsin researchers suggest installing a wireless transmitter in the heel.

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