Radar Slot Format for Base Station Signal Transmission
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Solution Overview
Problem
Current wireless communication systems, particularly in the 5G standard, face challenges in efficiently managing and transmitting radar signals between base stations, which affects the accuracy and coverage of radar systems used for object detection and tracking.
Innovation Solution
A method is introduced to determine and configure a radar slot format that transmits a reference radar signal on one symbol over a link from a first base station to a second base station, followed by target radar signals on subsequent symbols over separate links, allowing for efficient transmission and reception of radar signals using existing communication infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If radar signals are transmitted between base stations using existing communication infrastructure, then device complexity is reduced, but measurement precision deteriorates due to signal interference and timing synchronization issues
Solution Approach 1:
The patent segments the time domain into distinct slots, with dedicated reference signal slots and target signal slots. This segmentation separates the transmission of different radar signals in time, preventing interference while utilizing existing communication infrastructure. The reference signal slot contains synchronization and channel estimation signals, while target signal slots carry actual radar measurements, allowing precise detection without cross-contamination.
Solution Approach 2:
The patent introduces a specialized radar signal format as an intermediary layer between the communication infrastructure and radar detection functions. This format includes specific reference signals and target signals with defined structures that mediate between the shared communication medium and the precise measurement requirements, enabling accurate radar detection through existing infrastructure.
2Productivity
If multiple radar signals are transmitted simultaneously over shared links, then productivity increases, but loss of information worsens due to signal interference
Solution Approach 1:
The patent employs periodic transmission patterns where reference signals and target signals are transmitted in alternating time slots. This periodic structure allows the system to achieve high productivity by continuously utilizing the communication infrastructure while preventing information loss through temporal separation. Each period contains both reference and target signals, ensuring complete information transmission without interference.
Solution Approach 2:
The patent performs preliminary transmission of reference signals in dedicated slots before transmitting target signals. This preliminary action enables receivers to pre-establish synchronization and channel estimates, ensuring that subsequent target signal transmissions maintain integrity even when multiple signals share the infrastructure. The reference signals prepare the system for accurate target signal reception.
3Measurement precision
If radar slot format is optimized for signal transmission, then measurement precision improves, but device complexity increases due to format configuration and management
Solution Approach 1:
The patent optimizes measurement precision by carefully designing parameters of the radar slot format, including time slot durations, signal power levels, and frequency allocations. These parameter changes enhance detection accuracy while the parameters are configured through standardized protocols that prevent excessive complexity in format management. The parameter optimization is systematic rather than ad-hoc.
Solution Approach 2:
The patent designs a universal radar slot format that can be applied across different base station pairs and radar scenarios. This multi-functional format structure reduces the complexity of format configuration and management by providing a standardized template that works in various situations, eliminating the need for complex customizations while maintaining measurement precision through its carefully designed structure.
Data Source
AI summary
In an aspect, a radar controller determines a radar slot format that configures transmission of a reference radar signal on a first symbol over a first link from a first base station to a second base station followed by at least one target radar signal on at least one second symbol over at least one second link from the first base station to the second base station, and transmits an indication of the radar slot format to the first base station and the second base station. The first base station transmits, and the second base station receives, the reference radar signal and the at least one target radar signal in accordance with the radar slot format.