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Conference Paper
A Linear Transformation-Based Method for PBCH Combining in 5G NR
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- Authors
- Youngil Jeon, Hyungsik Ju, Jeeyon Choi, Junhwan Lee
- Issue Date
- 2025-07
- Citation
- International Conference on Ubiquitous and Future Networks (ICUFN) 2025, pp.562-564
- Language
- English
- Type
- Conference Paper
- Abstract
- The physical broadcast channel (PBCH) enables initial cell access and synchronization in 3GPP-based wireless systems. Time-domain combining enhances PBCH decoding by accumulating repeated transmissions, improving signal-to-noise ratio. While LTE allows direct soft combining due to its unchanged PBCH payload within a transmission time interval, NR introduces challenges as its PBCH payload varies across transmissions because it includes the system frame number and other parameters. This paper proposes an efficient NR PBCH combining method that compensates for payload and scrambling sequence differences before decoding. To reduce computational complexity, we introduce a simplified approach that pre-analyzes and stores these differences. Simulation results confirm that the proposed method meets NR performance requirements, improving PBCH reliability for 5G NR system access.
- KSP Keywords
- Broadcast channel, Computational complexity, Linear Transformation, Repeated transmissions, Signal noise ratio(SNR), Signal-to-Noise, Soft combining, Time interval, Transmission time, performance requirements, scrambling sequence