Improvement and Expansion of Operational Range for STPA-BAA Spectrum Superposing Scheme Using Subcarrier Adaptive Modulation
Improvement and Expansion of Operational Range for STPA-BAA Spectrum Superposing Scheme Using Subcarrier Adaptive Modulation
复制标题
DOI：
10.1109/iscit.2018.8587852
复制
发表时间：
2018-09
期刊：
影响因子：
--
通讯作者：
Katsuya SenooT;Takashi Akao;K. Maruta;C. Ahn
中科院分区：
文献类型：
--
作者：
Katsuya SenooT;Takashi Akao;K. Maruta;C. Ahn
由于对高速和大容量的需求，更宽的传输带宽在无线通信系统中是必不可少的。这就造成了频率资源的紧张，尤其是在微波频段。因此，即使在不同的无线通信系统中，频率资源的有效使用也是重要的问题。作为实现这一点的技术，已经提出了使用子载波发送功率分配（STPA）和盲自适应阵列（BAA）的频率共享方案。即使当多个系统使用相同的频带时，它也使得次级接收机能够通过STPA-BAA抑制与几乎相同电平的期望信号的干扰。它在减少对不具有干扰抑制功能的主接收机的干扰方面也是有效的。然而，STPA-BAA具有由于降低大部分子载波的功率而限制操作范围的问题。本文试图通过引入子载波自适应调制来解决这个问题。它可以有效地扩大我们提出的方法的工作范围，即使在低信噪比（SNR）区域。
Due to the demand for high-speed and large-capacity, wider transmission bandwidth is essential in wireless communication systems. It causes frequency resource shortage especially in microwave band. Therefore, efficient use of frequency resources even in different wireless communication systems is an important issue. As a technique to realize this, a frequency sharing scheme using subcarrier transmission power assignment (STPA) and blind adaptive array (BAA) has been proposed. Even when multiple systems use the same frequency band, it enables the secondary receiver to suppress interference with almost the same level of the desired signal by STPA-BAA. It is also effective in reducing interference to the primary receiver that has no interference suppression function. However, the STPA-BAA has a problem that the operational range is limited due to lowering the power of most of subcarriers. This paper attempts to resolve this issue by introducing subcarrier adaptive modulation. It can effectively expand the operational range of our proposed approach even in the low signal-to-noise-power-ratio (SNR) region.