Performance Investigation of 2-GBaud QAMs Using Fully-Integrated SiGe Chipset at 240-GHz

N. Maletic, M. Eissa, V. Sark, A. Malignaggi, E. Grass
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Abstract

This paper investigates the performance of quadrature-amplitude modulations (QAMs) of different orders with a 2 GBaud symbol rate over a wireless link in the 240 GHz band based on fully-integrated transmitter and receiver chips designed in a 130 nm SiGe technology. The results of end-to-end link measurements at 80 cm distance show the data rates of 4 to 12 Gbps, with an error vector magnitude (EVM) in the range of 7.5 - 8.5 % for all analyzed schemes. Targeting the bit-error-rate (BER) of 10-3, and using 2 GBaud symbol rate, the estimated maximal achievable distances based on the 240 GHz chipset are 3.7 m, 1.4 m, 0.9 m, and 0.7 m for 4-QAM, 16-QAM, 32-QAM, and 64-QAM, respectively. Furthermore, the paper discusses the prospects for throughput boost, using channel combining at an intermediate frequency (IF) as well as deploying Line-of-Sight multiple-input multiple-output (LOS-MIMO). By combining 5 channels and deploying 4×4 LOS-MIMO, depending on the used modulation scheme, data rates of 80 to 240 Gbps are conceivable.
240ghz下全集成SiGe芯片组2gbaud qam性能研究
本文研究了基于130 nm SiGe技术设计的全集成发送和接收芯片,在240 GHz频段无线链路上以2 GBaud符号速率进行不同阶的正交幅度调制(QAMs)的性能。在80厘米距离的端到端链路测量结果显示,所有分析方案的数据速率为4至12 Gbps,误差矢量幅度(EVM)在7.5 - 8.5%之间。以误码率(BER)为10-3为目标,使用2 GBaud符号率,基于240 GHz芯片组的4-QAM、16-QAM、32-QAM和64-QAM的最大可实现距离分别为3.7 m、1.4 m、0.9 m和0.7 m。此外,本文还讨论了使用中频(IF)信道合并以及部署视距多输入多输出(LOS-MIMO)来提高吞吐量的前景。通过组合5个信道并部署4×4 LOS-MIMO,根据所使用的调制方案,可以实现80至240 Gbps的数据速率。
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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