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Advanced Search Results For "ORTHOGONAL frequency division multiplexing"

1 - 10 of 14,474 results for
 "ORTHOGONAL frequency division multiplexing"
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A Novel Modulation Technique with Low PAPR for 5G-IoT Systems.

Publication Type:Academic Journal

Source(s):Wireless Communications & Mobile Computing. 7/25/2022, p1-7. 7p.

Abstract:For existing orthogonal frequency division multiplexing (OFDM) in 5G internet of things (5G-IoT) systems, one of the critical problems is the high peak to average power ratio (PAPR), which seriously degrades the energy efficiency. To this end, we propo...

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Highly Efficient MIMO-OFDM with Index Modulation.

Publication Type:Academic Journal

Source(s):Wireless Communications & Mobile Computing. 7/22/2022, p1-14. 14p.

Abstract:Index modulation (IM) is a novel digital modulation technique, which inactivates some subcarriers in orthogonal frequency division multiplexing (OFDM) to exploit the indices of the subcarriers to transmit bits implicitly, and has potential to further i...

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Sea Experimental for Compressive Sensing-Based Sparse Channel Estimation of Underwater Acoustic TDS-OFDM System.

Publication Type:Academic Journal

Source(s):Wireless Communications & Mobile Computing. 5/5/2022, p1-14. 14p.

Abstract:Due to the high spectral efficiency (SE) and fast synchronization, the time-domain synchronization orthogonal frequency division multiplexing (TDS-OFDM) system has gotten much more attraction of researchers as compared to cyclic-prefix (CP) and zero pa...

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MMW-NOMA: An Uplink NOMA Communication System Based on the Node Pairing Algorithm of Maximum and Minimum Weight in Underwater Acoustic Networks.

Publication Type:Academic Journal

Source(s):Wireless Communications & Mobile Computing. 6/30/2022, p1-16. 16p.

Abstract:In orthogonal multiple access (OMA) communication systems, resources are allocated to numerous users based on time, frequency, or code domains. The low bandwidth of the underwater acoustic network limits the number of nodes that can be supported by the...

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基于 GSA-BP 神经网络的OFDM系统信道估计算法.

Publication Type:Academic Journal

Source(s):Journal of Northeastern University (Natural Science). Jun2022, Vol. 43 Issue 6, p769-775. 7p.

Abstract:针对正交频分复用(orthogonal frequency division multiplexing, OFDM)系统中存在的不可忽视的非线性噪声问题,为了能够更好了解信道特性,需要利用信道估计获得信道状态信息,提出一种基于黄金正弦优化BP(golden sine algorithm,GSA-BP)神经网络的OFDM系统信道估计算法,克服了传统 BP神经网络算法容易陷入局部极值的问题,提升了信道估计算法的估计精度.首先通过LS信道估计算法获得信道的初始估计,再将其通过GSA-BP神经网络算法得到信...

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Sidelobe Reduction in NC-OFDM-Based CRNs Using Differential Evolution-Assisted Generalized Sidelobe Canceller.

Publication Type:Academic Journal

Source(s):Wireless Communications & Mobile Computing. 4/4/2022, p1-11. 11p.

Abstract:Noncontiguous orthogonal frequency division multiplexing (NC-OFDM) is considered a suitable candidate for the cognitive radio network (CRN) to accomplish efficient data transmission. The NC-OFDM allows secondary users (SUs) to access the primary user (...

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基于 KNN-TSVR 算法的 MIMO-OFDM 系统信道估计.

Publication Type:Academic Journal

Source(s):Journal of Northeastern University (Natural Science). Feb2022, Vol. 43 Issue 2, p176-181. 6p.

Abstract:为了提高多输入多输出正交频分复用(MIMO-OFDM)系统的信道估计性能, 提出了一种基于K近邻加权孪生支持向量回归(KNN-TSVR)的信道频率响应估计算法.该算法的工作过程是首先用最小二乘算法对导频位置的信道参数进行估计, 获取训练样本, 然后用K近邻(KNN)算法对训练样本进行预处理, 得到赋予各样本的权重, 最后由加权TSVR对MIMO-OFDM系统所有位置的信道参数进行插值估计.本文提出的改进的加权TSVR信道估计方法不仅具有TSVR对非线性关系回归的优势, 同时引入KNN算法对TSVR进...

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Improved MIMO Signal Detection Based on DNN in MIMO-OFDM System.

Publication Type:Academic Journal

Source(s):Computers, Materials & Continua. 2022, Vol. 70 Issue 2, p3625-3636. 12p.

Abstract:This paper proposes the multiple-input multiple-output (MIMO) detection scheme by using the deep neural network (DNN) based ensemble machine learning for higher error performance in wireless communication systems. For the MIMO detection based on the en...

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Embedding OFDM-Based Carrier Communication Into Power Control Loop of Converter in DC Microgrids.

Publication Type:Academic Journal

Source(s):IEEE Transactions on Industrial Electronics. Jul2022, Vol. 69 Issue 7, p6914-6924. 11p.

Abstract:In direct current (dc) microgrids, communication between converters is necessary for better power distribution and finer energy scheduling. This article proposes an orthogonal frequency division multiplexing (OFDM) based carrier communication method fo...

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Generalized Continuous Piecewise Linear Companding Transform Design for PAPR Reduction in OFDM Systems.

Publication Type:Academic Journal

Source(s):IEEE Transactions on Broadcasting. Sep2022, Vol. 68 Issue 3, p780-796. 17p.

Abstract:Linear companding transform (LCT) is one of the most attractive schemes to deal with the inherent problem of high peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems, due to its effectiveness and low complexi...

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