Demonstration of multi-Gbps data rates at Ka-band using software-defined modem and broadband high power amplifier for space communications

2011 IEEE MTT-S International Microwave Symposium Pub Date : 2011-06-05 DOI:10.1109/MWSYM.2011.5972636

R. Simons, E. Wintucky, D. Landon, Jun Y. Sun, J. Winn, S. Laraway, William K. McIntire, J. Metz, F. J. Smith

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引用次数: 16

Abstract

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 watts and efficiency greater than 60%. The modem and the TWTA together enabled an unprecedented data rate at 20 Gbps with low BER of 10−9. The presented results include a plot of the received waveform constellation, BER vs. Eb/N0 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 an order of magnitude (>10X) over current state-of-practice, limited only by the spacecraft EIRP, ground receiver G/T, range, and available spectrum or bandwidth.

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利用软件定义调制解调器和宽带高功率放大器演示ka波段多gbps数据速率用于空间通信

本文首次对软件定义的多gbps调制解调器与宽带高功率空间放大器的组合进行了研究和实验，并对扩展形式的工业标准DVB-S2和LDPC率9/10 FEC编解码器进行了测试。调制解调器支持QPSK、8-PSK、16-APSK、32-APSK、64-APSK和128-QAM等波形。宽带高功率放大器是一种空间合格行波管(TWT)，其在33 GHz时的通带大于3 GHz，输出功率为200瓦，效率大于60%。调制解调器和TWTA一起实现了前所未有的20gbps数据速率和10−9的低误码率。给出的结果包括接收波形星座的图，测试的每种调制类型的BER与Eb/N0和实现损耗。上述结果包括在射频链路预算分析中，表明NASA的有效载荷数据速率可以比目前的实践状态提高一个数量级(bbb10倍)，仅受航天器EIRP、地面接收器G/T、范围和可用频谱或带宽的限制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2011 IEEE MTT-S International Microwave Symposium

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