一种具有消息驱动的空闲子载波的高效多载波传输方案

Tianlong Song, Tongtong Li
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引用次数: 1

摘要

利用消息驱动的空闲子载波识别技术,提出了一种高效的多载波传输方案。其基本思想是通过空闲子载波选择来携带部分信息,称为载波比特,同时在所有其他子载波上定期传输普通比特。当子载波数量远远大于所采用的星座大小时(例如,在大多数OFDM系统中),可以获得较高的频谱效率和功率效率。这是因为通过每个空闲子载波传输的载波比特数大于一个规则符号所携带的普通比特数,并且所有的载波比特都是通过空闲子载波选择在不消耗功率的情况下传输的。当应用于OFDM框架时,该方案可以获得比OFDM更高的频谱效率,同时保持更高的功率效率。我们使用安全子载波分配、安全符号映射和位向量重排进一步提高了它的安全性和容错性。理论分析和数值结果验证了该方法的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A highly efficient multi-carrier transmission scheme with message-driven idle subcarriers
This paper develops a highly efficient multi-carrier transmission scheme by using message-driven idle subcarrier identification. The basic idea is to carry part of the information, named carrier bits, through idle subcarrier selection while transmitting ordinary bits regularly on all the other subcarriers. When the number of subcarriers is much larger than the adopted constellation size (e.g., in most OFDM systems), a high spectral efficiency as well as power efficiency can be achieved. This is because that the number of carrier bits transmitted through each idle subcarrier is larger than the number of ordinary bits carried by a regular symbol, and all the carrier bits are transmitted with no power consumption through idle subcarrier selection. When applied to the OFDM framework, the proposed scheme can achieve an even higher spectral efficiency than OFDM, while keeping a higher power efficiency.We further enhance its security and error-tolerance using secure subcarrier assignment, secure symbol mapping and bit vector rearrangement. Both theoretical analysis and numerical results are provided to demonstrate the performance of the proposed scheme.
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