Results 71 to 80 of about 26,068 (175)

Detect-and-forward relaying aided cooperative spatial modulation for wireless networks

, 2013
A novel detect-and-forward (DeF) relaying aided cooperative SM scheme is proposed, which is capable of striking a flexible tradeoff in terms of the achievable bit error ratio (BER), complexity and unequal error protection (UEP).
Dong, Binhong, El-Hajjar, Mohammed, Hanzo, Lajos, Li, Shaoqian, Xiao, Yue, Yang, Ping, Zhang, Bo   +6 more
core   +1 more source

Faster-Than-Nyquist Precoded CAP Modulation Visible Light Communication System Based on Nonlinear Weighted Look-Up Table Predistortion

IEEE Photonics Journal, 2018
In this paper, we have experimentally demonstrated faster-than-Nyquist carrierless amplitude and phase modulation quadrature phase-shift keying visible light communication system over 1.5-m free space transmission.
Shangyu Liang, Zihao Jiang, Liang Qiao, Xingyu Lu, Nan Chi   +4 more
doaj   +1 more source

SETI: The transmission rate of radio communication and the signal's detection

, 2011
The transmission rate of communication between radio telescopes on Earth and extraterrestrial intelligence (ETI) is here calculated up to distances of 1000 light years. Both phase-shift-keying (PSK) and frequency-shift keying (FSK) modulation schemes are
Fridman, P. A.
core   +1 more source

Performance study on a novel VBLAST modulation scheme under SUC detection

Tongxin xuebao, 2009
A new modulation scheme was proposed to deal with the error propagation（EP） existing during the successive cancellation（SUC） detection in the VBLAST（vertical Bell labs layered space-time） system.In the scheme,the former demodulated signal was designed to
JIANG Zhan-jun, PAN Wen, WANG Yan, YOU Xiao-hu   +3 more
doaj   +2 more sources

DESIGN OF SPACE TIME TRELLIS CODED OFDM

Journal of Engineering
Space Time Trellis Code (STTC) is a technique that can be used to improve the performance of the Orthogonal Frequency Division Multiplexing (OFDM) system over wireless channels by providing both coding gain and diversity gain.
S. M. Abbas
doaj   +1 more source

xLED: Covert Data Exfiltration from Air-Gapped Networks via Router LEDs

, 2017
In this paper we show how attackers can covertly leak data (e.g., encryption keys, passwords and files) from highly secure or air-gapped networks via the row of status LEDs that exists in networking equipment such as LAN switches and routers. Although it
Daidakulov, Andrey, Elovici, Yuval, Guri, Mordechai, Zadov, Boris   +3 more
core   +1 more source

Two Decades of MIMO Design Tradeoffs and Reduced-Complexity MIMO Detection in Near-Capacity Systems

IEEE Access, 2017
A pair of salient tradeoffs have driven the multiple-input multiple-output (MIMO) systems developments. More explicitly, the early era of MIMO developments was predominantly motivated by the multiplexing-diversity tradeoff between the Bell Laboratories ...
Chao Xu, Shinya Sugiura, Soon Xin Ng, Peichang Zhang, Li Wang, Lajos Hanzo   +5 more
doaj   +1 more source

Generalized Spatial Modulation in Indoor Wireless Visible Light Communication

, 2015
In this paper, we investigate the performance of generalized spatial modulation (GSM) in indoor wireless visible light communication (VLC) systems. GSM uses $N_t$ light emitting diodes (LED), but activates only $N_a$ of them at a given time.
Alaka, S. P., Chockalingam, A., Narasimhan, T. Lakshmi   +2 more
core   +1 more source

Time-Varying Communication Channel High Altitude Platform Station Link Budget and Channel Modeling

Information, 2018
Because of the high BER (Bit Error Rate), low time delay and low channel transmission efficiency of HAPS (High Altitude Platform Station) in the near space. The link budget of HAPS and channel model are proposed in this paper.
Xiaoyang Liu, Hengyang Liu, Chao Liu, Ya Luo   +3 more
doaj   +1 more source

Phase-locked loop with sideband rejecting properties Patent [PDF]

, 1966
Phase locked loop with sideband rejecting properties in continuous wave tracking ...
Brown, D. W., Easterling, M. F., Martin, W. L., Posner, E. C.   +3 more
core   +1 more source