BER performance of Superposed ACO-OFDM in multi-path fading channel
BER performance of Superposed ACO-OFDM in multi-path fading channel
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DOI：
10.1109/isspit.2016.7886019
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发表时间：
2016-12
期刊：
影响因子：
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通讯作者：
Tomoyuki Kozu;K. Ohuchi
中科院分区：
文献类型：
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作者：
Tomoyuki Kozu;K. Ohuchi
近年来，对射频（RF）通信的需求不断增加。光正交频分复用（O-OFDM）具有抗符号间干扰（ISI）和抗多径衰落的能力。本文在ACO-OFDM的基础上提出了一种叠加非对称限幅光OFDM（SACO-OFDM）。在SACO-OFDM中，我们将传统的ACO-OFDM信号叠加在另一个ACO-OFDM信号上。因此，我们可以使用传统ACO-OFDM的1.5倍的子载波。本文从误码率（BER）性能的角度研究了多径衰落对SACO-OFDM系统的影响。然后，我们假设脉冲响应由天花板反弹模型和指数衰减模型组成。因此，当我们使用多电平调制方法时，SACO-OFDM与ACO-OFDM相比是有利的。
Demand for Radio Frequency (RF) communications increases in late years. Optical Orthogonal Frequency Division Multiplexing (O-OFDM) has resistance to inter symbol interference (ISI) and multi-path fading. We proposed a Superposed Asymmetrically Clipped Optical OFDM (SACO-OFDM) which is based on ACO-OFDM. In SACO-OFDM, we superpose the conventional ACO-OFDM signal on the another ACO-OFDM signal. Thus, we can use 1.5 times as many subcarriers as the conventional ACO-OFDM. In this paper, we investigate influence of multi-path fading to SACO-OFDM from the view point of the bit error rate (BER) performance. Then, we assume that the impulse response consists of a ceiling bounce model and an exponential-decay model. As a result, SACO-OFDM is advantageous compared to ACO-OFDM when we use multi-level modulation methods.