An Improved Large Frequency Offset Estimator Using Interpolation of Expanded Periodogram

2012 ◽  
Vol E95.B (9) ◽  
pp. 3007-3010
Author(s):  
Seunghyun NAM ◽  
Jong-Min PARK ◽  
Heewook KIM ◽  
Tae Chul HONG ◽  
Kunseok KANG ◽  
...  
Keyword(s):  
Frequency Offset ◽  
Large Frequency

A Design of NB-IOT Random Access Preamble Receiver for Large Frequency Offset

2021 ◽  
Author(s):  
Chenchen Zhang ◽  
Nan Zhang ◽  
Wei Cao ◽  
Kaibo Tian ◽  
Zhen Yang
Keyword(s):  
Random Access ◽  
Frequency Offset ◽  
Large Frequency

scholarly journals Frequency Offset Tolerant Synchronization Signal Design in NB-IoT

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 4077 ◽  
Author(s):  
Jun Zou ◽  
Chen Xu
Keyword(s):  
Communication Systems ◽  
Low Cost ◽  
Frequency Offset ◽  
Wireless Communication Systems ◽  
Signal Design ◽  
Timing Error ◽  
Signal Structure ◽  
Synchronization Signal ◽  
Large Frequency ◽  
Suitable Sequence

Timing detection is the first step and very important in wireless communication systems. Timing detection performance is usually affected by the frequency offset. Therefore, it is a challenge to design the synchronization signal in massive narrowband Internet of Things (NB-IoT) scenarios where the frequency offset is usually large due to the low cost requirement. In this paper, we firstly proposed a new general synchronization signal structure with a couple of sequences which are conjugated to remove the potential timing error that arises from large frequency offset. Then, we analyze the suitable sequence for our proposed synchronization signal structure and discuss a Zadoff–Chu (ZC) sequence with root 1 as an example. Finally, the simulation results demonstrate that our proposed synchronization signal can work well when the frequency offset is large. It means that our proposed synchronization signal design is very suitable for the massive NB-IoT.

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