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Effect of randomizers on the power spectrum excess of space telemetry signals
International Journal of Satellite Communications and Networking ( IF 1.7 ) Pub Date : 2021-07-09 , DOI: 10.1002/sat.1416 Massimo Battaglioni 1 , Marco Baldi 1 , Franco Chiaraluce 1 , Roberto Garello 2 , Gian Paolo Calzolari 3 , Enrico Vassallo 3
International Journal of Satellite Communications and Networking ( IF 1.7 ) Pub Date : 2021-07-09 , DOI: 10.1002/sat.1416 Massimo Battaglioni 1 , Marco Baldi 1 , Franco Chiaraluce 1 , Roberto Garello 2 , Gian Paolo Calzolari 3 , Enrico Vassallo 3
Affiliation
This paper presents a thorough analysis of the spectral characteristics of space telemetry signals when randomizers are used to counter the power excess, that is, the increase of the power spectrum in some measurement bandwidths with respect to the transmission of an ideal random signal. We show that a long randomizer actually improves the spectral characteristics but is not able to solve some critical problems appearing when all-zero frames or almost constant data are transmitted. Suitable solutions are proposed to face these cases, ensuring a small power excess in all possible operation conditions. The impact of high-order modulations and error correcting codes is also investigated.
中文翻译:
随机发生器对空间遥测信号功率谱过剩的影响
本文对空间遥测信号的频谱特性进行了深入分析,当随机发生器用于对抗功率过剩时,即相对于理想随机信号的传输,某些测量带宽中功率谱的增加。我们表明,长随机化器实际上改善了光谱特性,但无法解决传输全零帧或几乎恒定数据时出现的一些关键问题。针对这些情况提出了合适的解决方案,确保在所有可能的操作条件下都有小的功率过剩。还研究了高阶调制和纠错码的影响。
更新日期:2021-07-09
中文翻译:
随机发生器对空间遥测信号功率谱过剩的影响
本文对空间遥测信号的频谱特性进行了深入分析,当随机发生器用于对抗功率过剩时,即相对于理想随机信号的传输,某些测量带宽中功率谱的增加。我们表明,长随机化器实际上改善了光谱特性,但无法解决传输全零帧或几乎恒定数据时出现的一些关键问题。针对这些情况提出了合适的解决方案,确保在所有可能的操作条件下都有小的功率过剩。还研究了高阶调制和纠错码的影响。