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Optical polar OFDM: On the effect of time-domain power allocation under power and dynamic-range constraints

机译:光极OFDM:在功率和动态范围约束下对时域功率分配的影响

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Polar OFDM (P-OFDM) is an OFDM format that can double the spectral efficiency of existing real-valued and unipolar optical OFDM intensity-modulation with direct detection (IM/DD) optical communication systems. P-OFDM modulates the amplitude and phase of a complex OFDM signal to allow a real unipolar signal. In this paper, we investigate the effect of power allocation to the phase and the amplitude components of P-OFDM time-domain signal on (1) the effective signal-to-noise ratio (SNR) at the receiver (2) the peak-to-average power ratio (PAPR) under transmit power constraint and (3) the induced clipping noise under optical-source's dynamic-range and transmit power constraints. In addition to a 4 dB reduction in PAPR from ACO-OFDM, we demonstrate the improvement of throughput for P-OFDM over other optical OFDM methods when the signal power is limited.
机译:极性OFDM(P-OFDM)是一种OFDM格式,可以通过直接检测(IM / DD)光通信系统将现有的实值和单极性OFDM强度调制的频谱效率提高一倍。 P-OFDM调制复杂OFDM信号的幅度和相位,以实现真实的单极性信号。在本文中,我们研究了功率分配给P-OFDM时域信号的相位和幅度分量对(1)接收机有效信噪比(SNR)(2)峰值的影响。发射功率约束条件下的平均功率比(PAPR)和(3)在光源的动态范围和发射功率约束条件下引起的削波噪声。除了ACO-OFDM的PAPR降低了4 dB,我们还展示了在信号功率受到限制的情况下,与其他光学OFDM方法相比,P-OFDM的吞吐量有所提高。

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