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Advanced Search Results For "MULTIPLEXING"

1 - 10 of 36,911 results for
 "MULTIPLEXING"
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Fast Tensor-Based Joint Estimation for Time Delay and Angle of Arrival in OFDM System.

Publication Type:Academic Journal

Source(s):International Journal of Antennas & Propagation. 9/27/2022, p1-10. 10p.

Abstract:Nowadays, the joint estimation of time delay (TD) and angle of arrival (AOA) using conventional vector structure suffers from the considerable complexity of multidimensional spectrum search. Therefore, a fast estimation method using orthogonal frequenc...

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Multiband RoF System with Good Transmission Performance Based on Additional SCS.

Publication Type:Academic Journal

Source(s):Wireless Communications & Mobile Computing. 8/22/2022, p1-7. 7p.

Abstract:A wavelength division multiplexing radio-over-fiber (WDM-RoF) system that can support multiband radio signals based on an additional subcentral station (SCS) is proposed and demonstrated in this paper. The dispersion characteristics of the multiband ra...

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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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Propagation and Network Analysis for a Dipole Based Massive Mimo Antenna for 5G Base Stations.

Publication Type:Academic Journal

Source(s):International Journal of Electronics & Telecommunications. 2022, Vol. 68 Issue 3, p511-517. 7p.

Abstract:In today's fast-paced world, where everyone/everything is moving towards an online platform, the need to provide high-speed data to all is inevitable. Hence, introducing the emerging 5G technology with orthogonal frequency division multiplexing integra...

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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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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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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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A 4 × 4 Beamforming Network for Spatial Diversity and Multiplexing Reconfiguration.

Publication Type:Academic Journal

Source(s):International Journal of Antennas & Propagation. 2/10/2022, p1-13. 13p.

Abstract:A simple 4 × 4 beamforming network with spatial diversity and multiplexing reconfiguration is proposed in this paper. By analyzing and decomposing the simplified transmission matrix of the network, it is found that the 4 × 4 butler matrix can achieve s...

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