Contributing to their size are the installed microphone, speaker, and antenna. The devices also need a larger battery to power the complex functions of the phone.

内置话筒、扬声器、天线都使体积难以缩小，而这些新型装置也需要体积较大的电池来支持其复杂的功能。

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Smart antenna is a complex system including array antennas digital signal processing unit and adaptive arithmetic unit.

智能天线是个复杂的系统包括天线阵列，数字信号处理单元和自适应算法单元。

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Computer simulations show that the pattern synthesis of antenna arrays can be carried out with fast convergence and excellent stability by the model, even for complex cases.

计算机仿真结果表明，与现有算法相比，该算法用于天线方向图综合具有收敛速度快、优化能力强、算法可靠等优势。

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On Tuesday, Cooper used his keynote address at the Embedded Systems Conference in Boston to run down a list of complaints against the wireless industry that ranged from closed carrier networks to inefficient cellular antenna systems to the design of smart phones like the iPhone, which he argues are overly complex.

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