Two Stage Fully Reusable Space Launch Vehicle Configuration and Performance Trades

1991 ◽  
Author(s):  
Valentine Dahlem ◽  
Peter R. Gord ◽  
Kevin J. Langan
Keyword(s):  
Launch Vehicle ◽  
Two Stage ◽  
Space Launch ◽  
Vehicle Configuration ◽  
And Performance

scholarly journals YUZHNOYE`S POSITION IN WORLD PLANS FOR MOON EXPLORATION

2019 ◽  
Vol 27 (4) ◽  
pp. 131-145
Author(s):  
Lilia Olegovna Velychko ◽  
Evgenia Alexandrovna Ermolenko
Keyword(s):  
Marketing Research ◽  
Launch Vehicle ◽  
Low Earth Orbit ◽  
Lunar Orbit ◽  
Earth Orbit ◽  
Transportation Services ◽  
Design Office ◽  
Space Launch ◽  
The Us ◽  
And Performance

The article discusses the lunar programs of leading countries of the world: EU, India, People’s Republic of China, South Korea, Israel, Russian Federation, Japan, USA, as well as possible direction of cooperation between Ukrainian cooperation and mentioned countries. The US lunar program is the most attractive. NASA invites private companies which can become Yuzhnoye State Design Office partners. Perspective payload delivery means into lunar orbit are proposed: Space Launch System, Falcon Heavy, Straship. Marketing strategy was developed to achieve economic efficiency of the space launch system operation project, designed for payloads injection into the lunar orbit (with Mayak launch vehicle family, developed by Yuzhnoye State Design Office, as an example) due to covering all possible segments of commercial, as well as government launch market. At the same time, comparison of price and performance characteristics of space transportation services into low Earth orbit is shown as of 2019. The prospective demand for Mayak launch vehicle family within the framework of the US state program for the development of the Moon was determined. According to the results of the marketing research, it can be concluded that with the price of about 3 000 US dollars for launching 1 kg of payload into low Earth orbit (from 70 to 330 million US dollars for launch), Mayak launch vehicle family have the advantageous position on the launch market into low Earth orbit and lunar orbit in comparison with the competitive positions of other ILVs in this market segment.

An Enhanced Two Stage MMSE Equalizer for Coded FBMC/OQAM Systems

2019 ◽  
Vol 10 (1) ◽  
pp. 69-82 ◽  
Author(s):  
Mohammad Rizk Assaf ◽  
Abdel-Nasser Assimi
Keyword(s):  
Error Propagation ◽  
Channel Model ◽  
Error Correcting Codes ◽  
Two Stage ◽  
Probability Of Error ◽  
Second Stage ◽  
Different Types ◽  
Mmse Equalizer ◽  
And Performance ◽  
Ici Cancellation

In this article, the authors investigate the enhanced two stage MMSE (TS-MMSE) equalizer in bit-interleaved coded FBMC/OQAM system which gives a tradeoff between complexity and performance, since error correcting codes limits error propagation, so this allows the equalizer to remove not only ICI but also ISI in the second stage. The proposed equalizer has shown less design complexity compared to the other MMSE equalizers. The obtained results show that the probability of error is improved where SNR gain reaches 2 dB measured at BER compared with ICI cancellation for different types of modulation schemes and ITU Vehicular B channel model. Some simulation results are provided to illustrate the effectiveness of the proposed equalizer.

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