当前位置:
X-MOL 学术
›
Int. J. Satell. Commun. Netw.
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A multiuser decoder based on spectrum analysis for the Brazilian Environmental Data Collecting System
International Journal of Satellite Communications and Networking ( IF 1.7 ) Pub Date : 2020-10-13 , DOI: 10.1002/sat.1381 José Marcelo L. Duarte 1 , Raffael S. C. G. Lima 1 , Vítor S. Ramos 1 , Manoel J. M. Carvalho 1
International Journal of Satellite Communications and Networking ( IF 1.7 ) Pub Date : 2020-10-13 , DOI: 10.1002/sat.1381 José Marcelo L. Duarte 1 , Raffael S. C. G. Lima 1 , Vítor S. Ramos 1 , Manoel J. M. Carvalho 1
Affiliation
The Brazilian Environmental Data Collection System (SBCDA) is an asynchronous multiuser message forwarding system based on low earth orbit (LEO) satellites with applications restricted to environmental monitoring and human life protection. This work presents a multiuser SBCDA decoder with low data memory and computational load. The decoder uses spectrum analysis to detect signal presences and upon every signal detection starts a signal decoding process with single‐user bit detection. Simulations considering an Additive White Gaussian Noise (AWGN) scenario with signal's time‐frequency positions uniformly and independently distributed and signal's powers uniformly distributed in dB within a dynamic range of 24 dB are present for different densities of user signals. Those show a frame error rate (FER) of approximately 25% for an average of six coexisting signals at every time instant, in which a missed signal was considered as a frame error. Finally, there are considerations on how to improve the performance maintaining a single‐input and single‐user bit detection strategy.
中文翻译:
基于频谱分析的巴西环境数据收集系统多用户解码器
巴西环境数据收集系统(SBCDA)是基于低地球轨道(LEO)卫星的异步多用户消息转发系统,其应用仅限于环境监控和人类生命保护。这项工作提出了具有低数据存储器和计算负荷的多用户SBCDA解码器。解码器使用频谱分析来检测信号是否存在,并且在每次检测到信号时都会启动具有单用户比特检测的信号解码过程。针对不同密度的用户信号,考虑了考虑加性高斯白噪声(AWGN)情况的模拟,其中信号的时频位置均匀且独立地分布,信号功率以dB为单位均匀分布在24 dB的动态范围内。对于每个时刻平均六个共存信号,这些帧显示出大约25%的帧错误率(FER),其中将丢失的信号视为帧错误。最后,在保持单输入和单用户位检测策略的情况下,需要考虑如何提高性能。
更新日期:2020-10-13
中文翻译:
基于频谱分析的巴西环境数据收集系统多用户解码器
巴西环境数据收集系统(SBCDA)是基于低地球轨道(LEO)卫星的异步多用户消息转发系统,其应用仅限于环境监控和人类生命保护。这项工作提出了具有低数据存储器和计算负荷的多用户SBCDA解码器。解码器使用频谱分析来检测信号是否存在,并且在每次检测到信号时都会启动具有单用户比特检测的信号解码过程。针对不同密度的用户信号,考虑了考虑加性高斯白噪声(AWGN)情况的模拟,其中信号的时频位置均匀且独立地分布,信号功率以dB为单位均匀分布在24 dB的动态范围内。对于每个时刻平均六个共存信号,这些帧显示出大约25%的帧错误率(FER),其中将丢失的信号视为帧错误。最后,在保持单输入和单用户位检测策略的情况下,需要考虑如何提高性能。