Transmission Performance of an OFDM-Based Higher-Order Modulation Scheme in Multipath Fading Channels
Transmission Performance of an OFDM-Based Higher-Order Modulation Scheme in Multipath Fading Channels
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DOI：
10.3390/jsan8020019
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发表时间：
2019-06-01
影响因子：
3.5
通讯作者：
Senda, Koki
中科院分区：
文献类型：
--
作者：
Otsuka, Hiroyuki;Tian, Ruxiao;Senda, Koki
第五代（5G）移动的系统是成功实现数据速率进一步提高的必要步骤。由于高阶正交幅度调制（QAM）的使用有望在有限的带宽内提高数据速率，因此我们提出了一种用于5G移动的系统中的基于正交频分复用（OFDM）的1024-和4096-QAM传输的方法，该方法具有软判决维特比解码。通过评估所提出的方法在多径衰落信道的传输性能，使用链路级仿真，我们确定了基于OFDM的1024-和4096-QAM的误比特率（BER）性能作为编码速率的函数下的两个多径衰落信道模型：扩展行人A（EPA）和扩展车辆A（伊娃）。我们还演示了相位误差对基于OFDM的1024-和4096-QAM的影响，并阐明了相位误差与实现1 x 10（-2）BER所需的信噪比（SNR）损失之间的关系。这项工作为在5G及以后引入高阶调制方案提供了有效的解决方案。
Fifth-generation (5G) mobile systems are a necessary step toward successfully achieving further increases in data rates. As the use of higher-order quadrature amplitude modulation (QAM) is expected to increase data rates within a limited bandwidth, we propose a method for orthogonal frequency division multiplexing (OFDM)-based 1024- and 4096-QAM transmission with soft-decision Viterbi decoding for use in 5G mobile systems. Through evaluation of the transmission performance of the proposed method over multipath fading channels using link-level simulations, we determine the bit error rate (BER) performance of OFDM-based 1024- and 4096-QAM as a function of coding rate under two multipath fading channel models: extended pedestrian A (EPA) and extended vehicular A (EVA). We also demonstrate the influence of phase error on OFDM-based 1024- and 4096-QAM and clarify the relationship between phase error and the signal-to-noise ratio (SNR) penalty required to achieve a BER of 1 x 10(-2). This work provides an effective solution for introducing higher-order modulation schemes in 5G and beyond.