...正交频分复用多址接入；直接检测；动态带宽分配；40 Gb/s [gap=1464]Key words: fibre optical communication technology; passive optical network; orthogonal frequency division multiple access; direct-detection; dynamic bandwidth allocation; 40 Gb/s ..
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...同的用户，这就引出了一类新的多址接入方式—— 正交频分复用多址接入（Orthogonal Frequency Division Multiple Access，OFDMA)， 该类接入方式具有高效灵活的特点 。
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采用遗传算法搜索子载波最优分配方案，对多用户正交频分复用多址接入(OFDMA)系统资源分配问题进行了研究，提出了一种多载波比例公平调度算法G - PFS。
Focusing on the resource allocation problem in multi-user orthogonal frequency division multiple access (OFDMA) systems, a multi-carrier proportional fair scheduling algorithm, G-PFS, is proposed.
调制方式和多址接入的灵活性是正交频分复用（OFDM）技术的一大优点。
One of the advantages of OFDM is the flexibility concerning modulation and multiple access techniques.
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