Advanced Search Results For "QUADRATURE amplitude modulation"

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Publication Type: Academic Journal

Source(s): IET Communications (Wiley-Blackwell). Mar2023, Vol. 17 Issue 5, p614-631. 18p.

Abstract: In filter bank multi‐carrier (FBMC) with offset quadrature amplitude modulation (OQAM) systems, the major limitation of FBMC‐OQAM signaling is the high peak‐to‐average power ratio (PAPR). High PAPR results in increased hardware complexity and is also p...

Publication Type: Academic Journal

Source(s): IET Communications (Wiley-Blackwell). Mar2023, Vol. 17 Issue 5, p576-590. 15p.

Abstract: The design of an optimal non‐orthogonal multiple access (NOMA) transmission scheme with finite alphabet inputs for a typical two‐user uplink wireless communication system is investigated in which each terminal is equipped with a single antenna. Each of...

Publication Type: Academic Journal

Source(s): Telecommunication Engineering. 2/28/2023, Vol. 63 Issue 2, p255-259. 5p.

Abstract: 针 对 具 有 偏 移 正 交 幅 度 调 制 的 滤 波 器 组 多 载 波 (Filter Bank Multicarrier with Offset Quadrature Amplitude Modulation, FBMC-OQAM) 系统中目前存在的定时同步算法问题, 提出了一种 改进的定时同步算法。 该算法利用两个特殊设计的符号, 将其连续通过 FBMC-OQAM 系统后在时域 形成共轭对称特性的信号。 与现有的算法相比, 该算法增加了计算相关序列的长度, 但减少了训练 符号, 还去除了...

Publication Type: Academic Journal

Source(s): Mobile Information Systems. 10/14/2021, p1-6. 6p.

Abstract: Signal modulation identification (SMI) has always been one of hot issues in filter-bank multicarrier with offset quadrature amplitude modulation (FBMC/OQAM), which is usually implemented by the machine learning-based feature extraction. However, it is ...

Publication Type: Academic Journal

Source(s): IEEE Transactions on Vehicular Technology. Aug2022, Vol. 71 Issue 8, p8424-8440. 17p.

Abstract: This article investigates the performance of intelligent reflective surfaces (IRS)-aided physical layer network coding (PNC) in two-way relaying channels (TWRC). Specifically, IRS is used to eliminate carrier phase offset (CPO) at the relay node. To th...

Publication Type: Academic Journal

Source(s): IEEE Transactions on Broadcasting. Sep2022, Vol. 68 Issue 3, p740-752. 13p.

Abstract: Non-uniform constellations (NUCs) successfully utilize geometrical shaping to approach the Shannon capacity, but increase demapping complexity. In this paper, enhanced non-uniform constellations for low-complexity and high-capacity communications are i...

Publication Type: Academic Journal

Source(s): Scientific Reports. 11/30/2022, Vol. 12 Issue 1, p1-13. 13p.

Abstract: Motivated to enhance the error performance (EP) of generalised complex quadrature spatial modulation (GCQSM) systems, this study proposes a scheme that builds on GCQSM and uses hexagonal quadrature amplitude modulation (H-QAM) constellations which have...

Publication Type: Academic Journal

Source(s): Mobile Networks & Applications. Oct2022, Vol. 27 Issue 5, p1828-1840. 13p.

Abstract: As a novel multiple-input multiple-output (MIMO) wireless transmission technique, differential spatial modulation (DSM) can reduce the computational complexity, and henceforth provides a feasible communications option in terms of the intelligence compu...

Publication Type: Periodical

Source(s): IEEE Transactions on Circuits & Systems. Part I: Regular Papers. Aug2022, Vol. 69 Issue 8, p3402-3415. 14p.

Abstract: A phase-locked-based frequency synthesizer – ubiquitously used to generate local oscillation in a communication transceiver – exhibits phase noise and jitter which considerably degrades bit-error rate (BER) and error vector magnitude (EVM) of a digital...

Publication Type: Academic Journal

Source(s): Wireless Communications & Mobile Computing. 5/19/2021, p1-8. 8p.

Abstract: Machine-to-machine communication (M2M) has obtained increasing interest in recent years. However, its enhancement and broadcasting characteristics produced a new security challenge. We have suggested a novel dynamic Quadrature Amplitude Modulation (QAM...