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In fading channels, power allocation over channel state may bring a rate increment compared to the fixed constant power mode. Such a rate increment is referred to power allocation gain. It is expected that the power allocation gain varies…

信息论 · 计算机科学 2014-12-25 Zhengchuan Chen , Pingyi Fan , Dapeng Wu , Liquan Shen

We consider a wireless system with a full-duplex (FD) access point (AP) that transmits to a scheduled user in the downlink (DL) channel, while receiving data from an user in the uplink (UL) channel at the same time on the same frequency. In…

信息论 · 计算机科学 2016-11-15 Mohammadali Mohammadi , Himal A. Suraweera , Ioannis Krikidis , Chintha Tellambura

In this paper, we investigate the impact of fading channel correlation on the performance of dual-hop decode-and-forward (DF) simultaneous wireless information and power transfer (SWIPT) relay networks. More specifically, by considering the…

信息论 · 计算机科学 2023-05-09 Farshad Rostami Ghadi , F. Javier Lopez-Martinez

We consider a bi-directional Full-Duplex (FD) Multiple-Input Multiple-Output (MIMO) communication system in which nodes are capable of performing transitter (TX)- Receiver (RX) digital precoding/combining and multi-tap analog cancellation,…

信息论 · 计算机科学 2018-09-25 Hiroki Iimori , Giuseppe Abreu , George C. Alexandropoulos

In this letter, an exact performance analysis is presented on the sum rate of zero-forcing beamforming with a greedy user scheduling algorithm in a downlink system. Adopting water-filling power allocation, we derive a compact form for the…

信息论 · 计算机科学 2013-07-22 Serdar Ozyurt , Murat Torlak

Cell-free Massive multiple-input multiple-output (MIMO) ensures ubiquitous communication at high spectral efficiency (SE) thanks to increased macro-diversity as compared cellular communications. However, system scalability and performance…

信息论 · 计算机科学 2019-09-09 Giovanni Interdonato , Marcus Karlsson , Emil Björnson , Erik G. Larsson

We analyze the outage performance of a two-way fixed gain amplify-and-forward (AF) relay system with beamforming, arbitrary antenna correlation, and co-channel interference (CCI). Assuming CCI at the relay, we derive the exact individual…

信息论 · 计算机科学 2016-11-18 Trung Q. Duong , Himal A. Suraweera , Hans-Jurgen Zepernick , Chau Yuen

This paper proposes a jointly cooperative relay and jamming protocol based on full-duplex (FD) capable relay to increase the source-destination secrecy rate in the presence of different types of eavesdroppers. In this so called…

信息论 · 计算机科学 2014-09-10 Saeedeh Parsaeefard , Tho Le-Ngoc

Multiple transmitting antennas can considerably increase the downlink spectral efficiency by beamforming to multiple users at the same time. However, multiuser beamforming requires channel state information (CSI) at the transmitter, which…

信息论 · 计算机科学 2017-01-31 Xu Du , John Tadrous , Ashutosh Sabharwal

The use of Terahertz (THz) frequency bands for data transmissions between the core network and an access point can be promising for next generation wireless systems. In this paper, we analyze the performance of a dual-hop relaying for…

信息论 · 计算机科学 2020-12-29 Pranay Bhardwaj , S. M. Zafaruddin

Motivated by the fact that full diversity order is achieved using the "best-relay" selection technique, we consider opportunistic amplify-and-forward and decode-and-forward relaying systems. We focus on the outage probability of such a…

信息论 · 计算机科学 2016-11-15 Ashkan Kalantari , Mohammadali Mohammadi , Mehrdad Ardebilipour

The outage probability performance of a dual-hop amplify-and-forward selective relaying system with global relay selection is analyzed for Nakagami-$m$ fading channels in the presence of multiple interferers at both the relays and the…

网络与互联网体系结构 · 计算机科学 2014-10-07 Kezhi Wang , Yunfei Chen , Marco Di Renzo

This paper studies the joint optimization problem of two-way relay beamforming, the receiver power splitting (PS) ratio as well as the transmit power at the sources to maximize the achievable sum-rate of a simultaneous wireless information…

信息论 · 计算机科学 2016-10-19 Alexander A. Okandeji , Muhammad R. A. Khandaker , Kai-Kit Wong , Zhongbin Zheng

The performance of full-duplex (FD) relay systems can be greatly impacted by the self-interference (SI) at relays. By exploiting multi-antenna in FD relay systems, the spectral efficiency of FD relay systems can be enhanced through spatial…

信息论 · 计算机科学 2016-11-03 Qingjiang Shi , Mingyi Hong , Xiqi Gao , Enbin Song , Yunlong Cai , Weiqiang Xu

This paper describes the limiting behavior of linear and decision feedback equalizers (DFEs) in single/multiple antenna systems employing real/complex-valued modulation alphabets. The wideband frequency selective channel is modeled using a…

信息论 · 计算机科学 2013-07-16 Kiran Kuchi

This paper presents an analytical investigation on the outage performance of dual-hop multiple antenna amplify-and-forward relaying systems in the presence of interference. For both the fixed-gain and variable-gain relaying schemes, exact…

信息论 · 计算机科学 2016-11-15 Caijun Zhong , Himal A. Suraweera , Aiping Huang , Zhaoyang Zhang , Chau Yuen

We consider a downlink (DL) massive multiple-input multiple-output (MIMO) system, where different users have different mobility profiles. To support this system, we categorize the users into two disjoint groups according to their mobility…

信息论 · 计算机科学 2024-08-29 Ruoxi Chong , Mohammadali Mohammadi , Hien Quoc Ngo , Simon L. Cotton , Michail Matthaiou

In this paper, link selection for half-duplex buffer-aided relay systems is revisited. A new fixed scheduling policy referred as alternate distributed beamforming (ADB) is proposed, in which the relays are divided into two groups, with one…

信息论 · 计算机科学 2019-10-10 Jiayu Zhou , Deli Qiao

In this paper, we analyze the throughput performance of incremental relaying using energy harvesting (EH) decode-and-forward (DF) relays in underlay cognitive radio networks (CRNs). The destination combines the direct and relayed signals…

信息论 · 计算机科学 2017-09-04 Komal Janghel , Shankar Prakriya

Downlink beamforming in Massive MIMO either relies on uplink pilot measurements - exploiting reciprocity and TDD operation, or on the use of a predetermined grid of beams with user equipments reporting their preferred beams, mostly in FDD…

信息论 · 计算机科学 2017-04-04 Jose Flordelis , Fredrik Rusek , Fredrik Tufvesson , Erik G. Larsson , Ove Edfors