| タイトル | Demonstration of Multi-Gbps Data Rates at Ka-Band Using Software-Defined Modem and Broadband High Power Amplifier for Space Communications |
| 本文（外部サイト） | http://hdl.handle.net/2060/20110012462 |
| 著者（英） | Wintucky, Edwin G.; Simons, Rainee N.; McIntire, William K.; Sun, Jun Y.; Winn, James S.; Laraway, Stephen; Metz, John L.; Smith, Francis J.; Landon, David G. |
| 著者所属（英） | NASA Glenn Research Center |
| 発行日 | 2011-04-01 |
| 言語 | eng |
| 内容記述 | The paper presents the first ever research and experimental results regarding the combination of a software-defined multi-Gbps modem and a broadband high power space amplifier when tested with an extended form of the industry standard DVB-S2 and LDPC rate 9/10 FEC codec. The modem supports waveforms including QPSK, 8-PSK, 16-APSK, 32-APSK, 64-APSK, and 128-QAM. The broadband high power amplifier is a space qualified traveling-wave tube (TWT), which has a passband greater than 3 GHz at 33 GHz, output power of 200 W and efficiency greater than 60 percent. The modem and the TWTA together enabled an unprecedented data rate at 20 Gbps with low BER of 10(exp -9). The presented results include a plot of the received waveform constellation, BER vs. E(sub b)/N(sub 0) and implementation loss for each of the modulation types tested. The above results when included in an RF link budget analysis show that NASA s payload data rate can be increased by at least an order of magnitude (greater than 10X) over current state-of-practice, limited only by the spacecraft EIRP, ground receiver G/T, range, and available spectrum or bandwidth. |
| NASA分類 | Space Communications, Spacecraft Communications, Command and Tracking |
| レポートNO | E-17733
NASA/TM-2011-217035 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/246885 |
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