针对以上不足，本课题研制了一种基于无线传输的LED点阵屏显示系统。

Thus a system of LED lattice screen based on wireless transmission is developed to fill up the deficiency above.

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其次，本文针对以上切换算法的不足提出了新型的切换算法：基于覆盖延展的高速业务新型切换算法。

Second, considering the disadvantages of present handover algorithms, this paper proposes a new OFDMA handover algorithm: A Coverage-based Handover Algorithm for High-speed Data Service.

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