In the SLZ region, high interference levels (> -105 dBm) were detected at two neighboring NR35 sites, BINAN and STAROSA2. The external interference was localized around the San Antonio Campus, impacting the 3.5 GHz band (3584–3588 MHz).
How to Optimize and Find 5G External Interference?
Analysis & Findings:
- Interference Detection: FFT and interference monitoring confirmed a strong interfering signal across both sites.
- Potential Source: A site scanning team suspected far-end microwave towers as the interference source.
- Impact on 5G Performance: High interference in the 3.5 GHz band can degrade SINR, reduce MCS levels, increase BLER, and ultimately lower throughput.
Optimization Actions:
- Field Investigation: Further investigation is required to confirm the 3.5 GHz microwave source and its alignment.
- Mitigation Strategies: If confirmed, mitigation measures such as reconfiguring microwave frequencies, adjusting antenna alignment, or deploying filters can be implemented.
- Continuous Monitoring: Deploy spectrum analyzers to track interference variations over time.
This case highlights the critical role of external interference troubleshooting and optimization in maintaining optimal 5G network performance.