Multichannel demultiplexer/demodulator technologies for future satellite communication systems [PDF]
NASA-Lewis' Space Electronics Div. supports ongoing research in advanced satellite communication architectures, onboard processing, and technology development.
Abramovitz, Irwin +4 more
core +1 more source
Optimization of an optically implemented on-board FDMA demultiplexer [PDF]
Performance of a 30 GHz frequency division multiple access (FDMA) uplink to a processing satellite is modelled for the case where the onboard demultiplexer is implemented optically.
Fargnoli, J., Riddle, L.
core +1 more source
PAPR Reduction Using CAZAC Sequences in SC-FDMA
Journal of Measurement Science and Instrumentation, 2011 In this paper,a group of methods in reducing Peak to Average Power Ratio（PAPR）in 3GPP-LTE uplink Single-Carrier Frequency Division Multiple Access（SC-FDMA）using Constant Amplitude Zero Auto-Correlation Sequences（CAZAC）sequences were proposed.The authors ...
Lei LI, En-chang SUN, Yan-hua ZHANG
doaj
Wavelet Transform Aided Single-Carrier FDMA With Index Modulation
IEEE Open Journal of Vehicular TechnologySingle-carrier frequency-division multiple access (SC-FDMA) is a well-known multiuser transmission method for uplink communications owing to its low peak-to-average power ratio (PAPR) characteristics. Simultaneously, index modulation (IM) has been widely
Zhou Lu +2 more
doaj +1 more source
Space Station communications and tracking systems modeling and RF link simulation [PDF]
In this final report, the effort spent on Space Station Communications and Tracking System Modeling and RF Link Simulation is described in detail. The effort is mainly divided into three parts: frequency division multiple access (FDMA) system simulation ...
Chie, Chak M. +2 more
core +1 more source
A study on the co- and adjacent channel protection requirements for mobile satellite ACSSB modulation [PDF]
Samples of speech modulated by narrowband frequency modulation (NBFM) (cellular) and amplitude companded single sideband (ACSSB) radios were subjected to simulated co- and adjacent channel interference environments typical of proposed frequency division ...
Sydor, John T.
core +1 more source
128-QAM Based mm-Wave Communication (5G) Architecture
International Journal of Electrical Engineering and Applied Sciences, 2019 Demand for bandwidth can never be fulfilled with any definite amount. Population is growing at a high speed which also causes an increase in the demand for bandwidth. Currently available bands ranging up-to 10 GHz is at the edge of saturation. So a newer
Abdullah Al-Mamun Bulbul +3 more
doaj
A reconfigurable multicarrier demodulator architecture [PDF]
An architecture based on parallel and pipline design approaches has been developed for the Frequency Division Multiple Access/Time Domain Multiplexed (FDMA/TDM) conversion system.
Jamali, M. M., Kwatra, S. C.
core +1 more source
Considerations of digital phase modulation for narrowband satellite mobile communication [PDF]
The Inmarsat-M system for mobile satellite communication is specified as a frequency division multiple access (FDMA) system, applying Offset Quadrature Phase Shift Keying (QPSK) for transmitting 8 kbit/sec in 10 kHz user channel bandwidth.
Grythe, Knut
core +1 more source
Time-varying channel estimation for LTE uplink SC-FDMA system with multi-user
Tongxin xuebao, 2014 A novel transform-domain based time-varying channel estimation method is proposed for the long term evolu-tion (LTE) uplink single carrier-frequency division multiple access (SC-FDMA) systems with multi-user.In the transform domain,the channel parameters
Li-hua YANG +2 more
doaj