Beam Direction Adjustment for Wireless Receiver Saturation
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Solution Overview
Problem
Receiver saturation at wireless devices, particularly in advanced networks like 5G+ and 6G, occurs due to deployment proximity to gNBs, leading to performance degradation in signal-to-noise ratio (SNR) despite high received signal levels, especially with narrow beams in millimeter wave systems.
Innovation Solution
Adjusting receive and transmit beams to mitigate receiver saturation by selecting non-optimal directions based on signal-to-noise ratio (SNR) metrics to avoid or reduce saturation, employing techniques applicable to UEs, gNBs, or both.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If narrow beams are used in millimeter wave systems to improve link budget and signal strength, then received signal level increases, but receiver saturation occurs and SNR performance degrades
Solution Approach 1:
The system dynamically changes beam parameters (direction, width, gain) based on detected receiver saturation conditions. When saturation is detected, the beam is adjusted to a non-optimal direction that provides lower gain, thereby reducing the received signal level to prevent saturation while maintaining acceptable SNR performance.
Solution Approach 2:
The beam configuration is made dynamic rather than static. The system continuously monitors receiver status and adjusts beam parameters in real-time based on operating conditions, transitioning between optimal and non-optimal beam directions as needed to balance signal strength and prevent saturation.
2Reliability
If transmission power is lowered to mitigate receiver saturation, then receiver saturation is reduced, but transmit error vector magnitude (EVM) degrades
Solution Approach 1:
Instead of simply reducing transmission power, the system changes the beam parameter (direction) to a non-optimal beam that provides lower gain. This approach mitigates receiver saturation by reducing the effective received signal level while maintaining transmit EVM performance, as the beam direction change affects received signal strength rather than transmit signal quality.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques wireless communication at a first wireless node generally including communicating with a second wireless device using a first beam, detecting at least one condition indicative of receiver saturation at the first wireless device or the second wireless device, and taking at least one action designed to mitigate the receiver saturation after detecting the at least one condition.