Signal design and analysis for cell identification in Sub-THz OFDM systems

Abstract

Here we propose a new signal set design for physical cell identification (PCI) in sub-THz OFDM systems. We also derive useful properties of proposed signal set, which can be employed to assign PCI and reduce interference. The proposed signal set is easy to generate because it is designed using binary m-sequences. These sequences exhibit the relationship of being preferred pairs to each other. The performance of the proposed signal set is similar to that of the secondary synchronization signal (SSS) for 5G NR, but the possible number of signal set is much larger than that of SSS for 5G NR. Furthermore, the proposed signal set contains SSS for 5G NR and a binary Gold sequence set as subsets. The proposed signal set can provide approximately 100 times more signals than the SSS of 5G NR. The signal to noise ratio (SNR) loss of the proposed signal is less than 1 dB for 4 times more sequences relative SSS of 5G NR and less than 2 dB for 25 times more sequences than the SSS of 5G NR.

Keywords

• Physical cell identification
• Sub-THz
• Beyond 5G
• Signal set
• Sequences