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首页> 外文期刊>IEEE Transactions on Communications >Multiple-subcarrier optical communication systems with subcarrier signal-point sequence
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Multiple-subcarrier optical communication systems with subcarrier signal-point sequence

机译：具有子载波信号点序列的多子载波光通信系统

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摘要

We propose a multiple-subcarrier (MS) optical communication system with subcarrier signal-point sequence (SSPS). We use the SSPSs having a large minimum value and large Euclidean distances, so that the required dc bias is minimized and the error-rate performance is improved. Note that in the proposed system, the signal points having the larger minimum value are selected, while the signal points having a lower peak-to-mean-envelope-power ratio (PMEPR) are selected in orthogonal frequency-division multiplexing (OFDM) systems. Therefore, the SSPSs good for OFDM with phase shifting by /spl pi/ rad are not necessarily effective for MS optical communication systems. The main contributions of our paper are: 1) we derive transmit sequences having a large minimum value and large Euclidean distances by using 8-phase-shift keying and (8+1)-amplitude phase-shift keying; and 2) since designing optimal sequences would be prohibitively complex, we introduce a reasonable procedure for suboptimal sequence design, obtaining good results. We show that the normalized power requirements and normalized bandwidth requirements of the MS systems with SSPS are smaller than those of the conventional MS systems.
机译：我们提出了具有子载波信号点序列（SSPS）的多子载波（MS）光通信系统。我们使用具有较大最小值和较大欧氏距离的SSPS，以便将所需的直流偏置最小化，并改善了误码率性能。注意，在提出的系统中，选择具有较大最小值的信号点，而在正交频分复用（OFDM）系统中选择具有较低峰均值信封功率比（PMEPR）的信号点。因此，对于具有相移/ spl pi / rad的OFDM的SSPS而言，对MS光通信系统不一定有效。本文的主要贡献是：1）通过使用8相移键控和（8 + 1）振幅相移键控，得出具有较大最小值和较大欧氏距离的发射序列； 2）由于设计最佳序列会非常复杂，因此我们为次优序列设计引入了合理的程序，从而获得了良好的结果。我们显示，具有SSPS的MS系统的归一化功率要求和归一化带宽要求比常规MS系统小。

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