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In traditional cognitive radio networks, secondary users (SUs) typically access the spectrum of primary users (PUs) by a two-stage "listen-before-talk" (LBT) protocol, i.e., SUs sense the spectrum holes in the first stage before…

网络与互联网体系结构 · 计算机科学 2016-02-25 Yun Liao , Tianyu Wang , Lingyang Song , Zhu Han

PT-symmetric optical resonators combine absorbing regions with active, amplifying regions. The latter are the source of radiation generated via spontaneous and stimulated emission, which embodies quantum noise and can result in lasing. We…

光学 · 物理学 2012-02-29 Gwangsu Yoo , H. -S. Sim , Henning Schomerus

In addition to ever-present thermal noise, communication and sensor systems can contain significant amounts of interference with outlier (e.g. impulsive) characteristics. Such outlier interference (including that caused by nonlinear signal…

信号处理 · 电气工程与系统科学 2019-07-10 Alexei V. Nikitin , Ruslan L. Davidchack

We theoretically investigate reflection and transmission measurements of two-photon and four-photon Kerr parametric oscillators (KPOs), introducing interference effects between inter-level transitions. Due to the level degeneracy of a KPO,…

量子物理 · 物理学 2025-11-03 Shumpei Masuda

Detecting coherent phonons pose different challenges compared to coherent photons due to the much stronger interaction between phonons and matter. This is especially true for high frequency heat carrying phonons, which are intrinsic lattice…

介观与纳米尺度物理 · 物理学 2018-03-14 Ding Ding , Xiaobo Yin , Baowen Li

We describe a non-cooperative interference alignment (IA) technique which allows an opportunistic multiple input multiple output (MIMO) link (secondary) to harmlessly coexist with another MIMO link (primary) in the same frequency band.…

信息论 · 计算机科学 2015-05-13 S. M. Perlaza , N. Fawaz , S. Lasaulce , M. Debbah

We describe two-photon absorption processes excited by entangled pairs, but not by non-entangled pairs of the same energy and polarization. Photon states are selected for destructive interference in the non-entangled process between…

量子物理 · 物理学 2010-12-21 Keith Kastella , Ralph S. Conti

Periodic signals in electrical and electronic equipment can cause interference in nearby devices. Randomized modulation of those signals spreads their energy through the frequency spectrum and can help to mitigate electromagnetic…

量子物理 · 物理学 2014-11-27 Juan Carlos Garcia-Escartin

Simultaneous Wireless Information and Power Transfer (SWIPT) over a point-to-point frequency-selective Additive White Gaussian Noise (AWGN) channel is studied. Considering an approximation of the nonlinearity of the harvester, a general…

信息论 · 计算机科学 2019-01-08 Morteza Varasteh , Borzoo Rassouli , Bruno Clerckx

Wireless power transfer (WPT) technologies are becoming ubiquitous, but unlike wire technologies, they do not allow efficient energy transfer through barely transparent barriers. The proposed solutions to this issue rely on resonantly…

光学 · 物理学 2019-09-16 Alex Krasnok

This paper proposes serialized output training (SOT), a novel framework for multi-speaker overlapped speech recognition based on an attention-based encoder-decoder approach. Instead of having multiple output layers as with the permutation…

计算与语言 · 计算机科学 2020-08-11 Naoyuki Kanda , Yashesh Gaur , Xiaofei Wang , Zhong Meng , Takuya Yoshioka

In future B5G/6G broadband communication systems, non-linear signal distortion caused by the impairment of transmit power amplifier (PA) can severely degrade the communication performance, especially when uplink users share the wireless…

网络与互联网体系结构 · 计算机科学 2023-08-25 Xiaojia Wang , Suzhi Bi , Xian Li , Xiaohui Lin , Zhi Quan , Ying-Jun Angela Zhang

In this paper, we formulate two multi-objective optimization problems (MOOPs) in orthogonal frequency-division multiple access (OFDMA)-based in-band full-duplex (IBFD) wireless communications.~The aim of this study is to exploit the…

信息论 · 计算机科学 2020-07-29 Ata Khalili , Mohammad Robat Mili , Derrick Wing Kwan Ng

In this paper, the outage performance of downlink non-orthogonal multiple access (NOMA) is investigated for the case where each user feeds back only one bit of its channel state information (CSI) to the base station. Conventionally,…

信息论 · 计算机科学 2016-05-18 Peng Xu , Yi Yuan , Zhiguo Ding , Xuchu Dai , Robert Schober

Implementation of a parity-time (PT) symmetric microwave photonic system in the optical wavelength space with spatial singularity is proposed. In the proposed PT-symmetric microwave photonic system, the gain and loss modes are confined in a…

光学 · 物理学 2019-10-11 Lingzhi Li , Guangying Wang , Jiejun Zhang , Xinhuan Feng , Baiou Guan , Jianping Yao

In traditional cognitive radio networks, secondary users (SUs) typically access the spectrum of primary users (PUs) by a two-stage "listen-before-talk" (LBT) protocol, i.e., SUs sense the spectrum holes in the first stage before transmit in…

网络与互联网体系结构 · 计算机科学 2016-11-18 Yun Liao , Tianyu Wang , Lingyang Song , Zhu Han

For high speed ultra-wideband (UWB) communication systems, the multipath interference exhibits a primary obstacle to improve transmission performance. In order to enhance the signal to interference plus noise ratio (SINR) in the receiver, a…

信号处理 · 电气工程与系统科学 2018-01-09 Yang Cao , Chao Luo , Xuanli Wu

Perceptive mobile network (PMN) is a recently proposed next-generation network that integrates radar sensing into communication. One major challenge for realizing sensing in PMNs is how to deal with spatially-separated asynchronous…

信号处理 · 电气工程与系统科学 2020-11-19 Zhitong Ni , J. Andrew Zhang , Xiaojing Huang , Kai Yang , Jinhong Yuan

In a system where a boson (e.g, a phonon) of finite frequency $\omega_0$ is coupled to electrons, two phenomena occur as the coupling is increased: electron pairing and polarization of the boson field. Within a path integral formalism and a…

强关联电子 · 物理学 2013-05-29 S. Ciuchi , G. Sangiovanni , M. Capone

A memoryless interference network model is introduced that is based on non-linear phenomena observed when transmitting information over optical fiber using wavelength division multiplexing. The main characteristic of the model is that…

信息论 · 计算机科学 2010-05-04 Hassan Ghozlan , Gerhard Kramer