Angular Offset Reporting for Wideband Beam Alignment
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Solution Overview
Problem
Wireless communication systems face challenges in maintaining effective beam direction across wide frequency bandwidths, leading to transmission failures due to deviations in beam direction, especially when using narrow beams and wide frequency bandwidths, resulting in reduced signal strength for outer frequencies.
Innovation Solution
A method where a wireless device determines and reports angular offsets across a frequency range by calculating the angle of arrival for signals received over a reference frequency and estimating relative angles for other frequencies, allowing the transmitting device to adapt its antenna configuration to compensate for beam deviations, ensuring consistent signal direction across the frequency bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If narrow beams are used with wide frequency bandwidths, then spectral efficiency is improved, but beam direction deviation occurs leading to transmission failures
Solution Approach 1:
The receiving device calculates angular offsets for multiple frequencies in advance based on the reference frequency angle of arrival. These pre-calculated angular offsets are then reported to the transmitting device, which uses them to proactively adjust its beam directions before transmission failures occur, thereby maintaining reliable communication across wide frequency bandwidths while using narrow beams for high spectral efficiency
Solution Approach 2:
The system changes the beam direction parameters based on frequency offset. By calculating angular offsets that represent how beam direction varies with frequency and using these to adjust transmitting beam directions, the system adapts beam parameters to compensate for frequency-dependent deviations, enabling reliable wideband narrowbeam communication
2Device complexity
If a single beam direction is used across wide frequency bandwidths, then device complexity is reduced, but signal strength decreases for outer frequencies
Solution Approach 1:
Instead of dynamically adjusting beams for each frequency during transmission, the receiving device pre-calculates angular offsets for all frequencies in the bandwidth based on the reference frequency. This preliminary calculation allows the transmitting device to configure appropriate beam directions in advance, avoiding the need for complex real-time beam management while maintaining signal strength across all frequencies
Solution Approach 2:
The system determines that beam direction parameters must be changed across different frequencies to maintain signal strength. By calculating the angular offset for each frequency relative to the reference frequency, the system identifies the necessary parameter changes and applies them, achieving frequency-specific beam optimization without excessive complexity
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A receiving device may receive a signal over a first frequency from a transmitting device. The receiving device may determine a set of angular offsets associated with communicating signals over a set of frequencies based on the angle of arrival of the signal, where each frequency of the set of frequency may be offset from the first frequency by a different amount. The receiving device may indicate the set of angular offsets to the transmitting device. The transmitting device may adapt a reception configuration for receiving signals from the receiving device, transmitting signal to the receiving device, or both based on the indication of the set of angular offsets.