arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.05869eess.SP
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多信道光通信中用于联合信道载波相位估计的导频分布

Pilot Distributions for Joint-Channel Carrier-Phase Estimation in Multichannel Optical Communications

Arni F. Alfredsson, Erik Agrell, Magnus Karlsson, Henk Wymeersch

AI总结:

针对多信道光通信的联合信道载波相位估计,本文优化二维信道—时间导频分布,显著降低相位噪声均方误差并提升高阶QAM可达信息速率。

摘要:

联合信道载波相位估计可以提升多信道光通信系统的性能。在导频辅助估计的情况下,导频分布在一个通过多个信道传输的二维信道—时间符号块中。然而,次优的导频分布会降低载波相位估计的有效性,从而导致不必要的导频开销,这会降低系统的整体信息速率。研究表明,在所有信道中以相同方式放置导频通常是次优的。通过转而优化导频分布,在某些情况下相位噪声估计的均方误差可降低超过90%。此外,研究表明,在假设总激光线宽为200 kHz的条件下,对于通过20个四维信道进行的双偏振20 GBd传输,64进制、256进制和1024进制正交幅度调制的可达信息速率可分别提升至多0.05、0.16和0.41比特每复符号。

英文摘要:

Joint-channel carrier-phase estimation can improve the performance of multichannel optical communication systems. In the case of pilot-aided estimation, the pilots are distributed over a two-dimensional channel--time symbol block that is transmitted through multiple channels. However, suboptimal pilot distributions reduce the effectiveness of the carrier-phase estimation and thus result in unnecessary pilot overhead, which reduces the overall information rate of the system. It is shown that placing pilots identically in all channels is suboptimal in general. By instead optimizing the pilot distribution, the mean squared error of the phase-noise estimates can be decreased by over 90% in some cases. Moreover, it is shown that the achievable information rate can be increased by up to 0.05, 0.16, and 0.41 bits per complex symbol for dual-polarization 20 GBd transmission of 64-ary, 256-ary, and 1024-ary quadrature amplitude modulation over 20 four-dimensional channels, respectively, assuming a total laser linewidth of 200 kHz.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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