Intermodulation and bit-error ratio performance of a Ku-band multibeam high-power phased array

2002 ◽  
Author(s):  
E.C. Kohls ◽  
E.P. Ekelman ◽  
A.I. Zaghloul ◽  
F.T. Assal
Keyword(s):  
High Power ◽  
Phased Array ◽  
Error Ratio ◽  
Bit Error Ratio ◽  
Ku Band

A Ku-band multibeam active phased array for satellite communications

1992 ◽  
Author(s):  
R. SORBELLO ◽  
A. ZAGHLOUL ◽  
R. GUPTA ◽  
B. GELLER ◽  
F.T. ASSAL
Keyword(s):  
Phased Array ◽  
Satellite Communications ◽  
Ku Band

Research on the Technology of Low-Voltage Power Line Carrier-Current Communication Based on OFDM

2013 ◽  
Vol 397-400 ◽  
pp. 2004-2007
Author(s):  
Wen Yan Ding ◽  
Zhi Ning Sun ◽  
Xiang Long Wang
Keyword(s):  
Low Voltage ◽  
Power Line ◽  
Power Line Communication ◽  
Channel Code ◽  
Carrier Wave ◽  
Wave Modulation ◽  
Modulation And Demodulation ◽  
Error Ratio ◽  
Power Line Carrier ◽  
Bit Error Ratio

The design on the system of low-voltage power line carrier-current communication based on OFDM was finished in this paper. Then model of the system was simulated and the modulation and demodulation of OFDM were realized. The results show that the integral performance can be enhanced with channel code. And the bit error ratio (BER) of the system is different with several sub-carrier wave modulation modes. This system could satisfy the requirement of power line communication basically.

Design and Realisation of High Power GaAs CW and Pulsed Impatt Sources in the Ku Band

1987 ◽  
Author(s):  
M. Berbineau-Barre ◽  
C. Daile ◽  
P.A Rolland ◽  
P. Arsene-Henry ◽  
M. Calligaro
Keyword(s):  
High Power ◽  
Ku Band

scholarly journals A Broadband Conformal Phased Array Antenna on Spherical Surface

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Dan Sun ◽  
Rong Shen ◽  
Xuequan Yan
Keyword(s):  
Phased Array ◽  
Spherical Surface ◽  
Ground Plane ◽  
Array Antenna ◽  
Phased Array Antenna ◽  
Simulated Model ◽  
Conformal Array ◽  
Spherical Structure ◽  
Matching Performance ◽  
Ku Band

A Ku-band wideband conformal array antenna with13×19elements is presented in the paper. The array has a spherical structure, and its element is a proximity-coupled stacked patches antenna with a cavity-backed ground plane. The stacked patches and the cavity produce multiple coupled resonances, which enhance the bandwidth of the element extremely. A simulated model with the reasonable dimensions is framed with the coupling analyses, and the effective simulated results and good computing efficiency are obtained simultaneously. The measured results of the center embedded element in the whole array show a bandwidth exceeding 40%VSWR<2, which is close to the simulated matching performance.

scholarly journals Improvement of Multipath Channel Performance for Optical MIMO-OFDM in LED Modulation with Fully Generalized Spatial-Frequency

2021 ◽  
Author(s):  
Nandhini Devi R ◽  
Leones Sherwin VimalrajS ◽  
Lydia J
Keyword(s):  
Optical Communication ◽  
Spatial Multiplexing ◽  
Modulation Scheme ◽  
New Concepts ◽  
Data Rates ◽  
Error Ratio ◽  
Bit Error Ratio ◽  
Mimo Ofdm ◽  
Transmission Diversity ◽  
Ofdm Signals

This paper suggests a scheme to generalize the idea of LED index modulation concept by using the spatial multiplexing principle to relay complex OFDM signals through various channels such as AWGN, Rayleigh and Rician by splitting these signals into their real-imaginary and positive-negative components. In order to combat ISI as well as to increase the channel capacity. The MIMO-OFDM efficiency analysis, taking into account the constraint of the forward current of the LED is extracted. The accuracy of the theoretical results is verified by comparing the Bit Error Ratio (BER) reduction and improvement to the (SNR) results under varying condition of the channel. Using MIMO-OFDM as next-generation techniques, along with QAM aims to provide development of new concepts that will lead to the growth of future optical communication. Simulation results validate data rates gained over optical communication using LED modulation scheme and the pure transmission diversity method.

scholarly journals Eigenvalue Decomposition Precoded Faster-Than-Nyquist Transmission of Index Modulated Symbols

2021 ◽  
Author(s):  
Prakash Chaki ◽  
Takumi Ishihara ◽  
Shinya Sugiura
Keyword(s):  
Time Domain ◽  
Eigenvalue Decomposition ◽  
Single Carrier ◽  
Error Ratio ◽  
Nyquist Criterion ◽  
Bit Error Ratio ◽  
Personal Use ◽  
Constrained Capacity ◽  
Criterion Time ◽  
Ieee International Symposium

Postprint accepted on 30 April 2021 for publication in IEEE International Symposium on Information Theory (ISIT), 2021. (c) 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.<div>In this paper, we propose a precoded faster-than-Nyquist (FTN) signaling technique for time-domain single-carrier index modulated (IM) symbol transmission. More precisely, eigenvalue decomposition precoding is adopted for the FTN transmission of data bits modulated by single-carrier time-domain IM. While the FTN scheme increases the spectral efficiency and data rate by packing more transmit symbols per block duration than those defined in the Nyquist criterion, time-domain IM works towards the same objective while maintaining symbol sparsity. We analytically derive the constrained capacity of the proposed system. Our simulation results show that the proposed scheme has better bit error ratio (BER) performance over the conventional FTN-IM scheme, particularly for the scenario of a higher packing ratio. In the proposed scheme, $2.5$-dB performance gain is observed at the BER of 10<sup>-4</sup>, employing the packing ratio of $0.7$ and the roll-off factor of $0.5$ in a channel-uncoded scenario.<br></div>

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