Multiple antenna system can improve the reliability and capacity of wireless communication.

多天线系统可以改进无线通信的容量，提高可靠性。

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A class of multiple transmit antenna systems is defined based on vector norm and the outage probability of them are studied.

用矢量范数定义了一类多发射天线系统，并对各系统的中断概率性能进行了研究。

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However, multiple antenna system needs multiple RF chains, which will add cost in terms of size, power, and hardware.

然而，使用多天线，就意味着多个射频链路会增加天线的体积、功率、硬件，从而增加成本。

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These people also said Apple's antenna woes go back years, through multiple versions of the iPhone and with repeated instances of design clashing with functionality.

WSJ: Apple Knew of iPhone Antenna Risks

One more product pick we recently came across that can enable die-hard football fans to catch multiple games on the go is the Dish Network Tailgater Portable Satellite Antenna and ViP 211k receiver.

FORBES: The Most Fuel-Efficient Tailgating Vehicles