Comparison Of Ofdm And Single-Carrier Transmission For Ultra-Low Delay Applications
2018 IEEE GLOBECOM WORKSHOPS (GC WKSHPS)(2018)
摘要
In this paper, we show that Orthogonal Frequency Division Multiplexing (OFDM) is not well suited for transmission over wireless channels with intersymbol interference (ISI), if a low delay constraint prohibits the use of channel codes with long code words. We compare OFDM with single-carrier transmission for scenarios with very short block lengths and different code rates. The single-carrier receive signal is equalized and decoded using either a Turbo scheme or a so-called matched decoder, which combines channel equalization and decoding and allows for a flexible trade-off between complexity and performance. Our results show that OFDM suffers from severe losses compared to single-carrier transmission if a very low latency corresponding to a very short block length is required. This effect is most pronounced for high code rates.
更多查看译文
关键词
Orthogonal Frequency Division Multiplexing (OFDM), Single-Carrier Transmission, Low Latency, Equalization
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要