OFDM-Compatible FMCW SRS Design for 5G Coverage and Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems, particularly in 5G, face challenges in efficiently utilizing sounding reference signals (SRS) for multiple use cases such as channel sounding, positioning, and environment sensing, due to limitations in waveform compatibility and Doppler division multiplexing.
Innovation Solution
Implementing an orthogonal frequency division multiplexing (OFDM) compatible frequency modulated continuous wave (FMCW) waveform for sounding reference signals (SRS) to enhance uplink communication coverage, positioning, and sensing capacity, while optimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional OFDM waveforms are used for SRS transmission, then compatibility with existing 5G systems is maintained, but uplink coverage and power efficiency are limited
Solution Approach 1:
The patent changes the waveform parameter from traditional OFDM to FMCW, which fundamentally alters how the signal is transmitted. FMCW uses continuous frequency modulation instead of discrete OFDM symbols, enabling better power efficiency through continuous transmission at lower peak powers while maintaining or improving uplink coverage through enhanced signal processing and frequency diversity.
Solution Approach 2:
The FMCW waveform design is made compatible with multiple 5G use cases including channel sounding, positioning, and sensing. By designing a universal FMCW-based SRS that can serve multiple functions, the system achieves improved power efficiency and coverage across different application scenarios without requiring separate waveform designs for each use case.
2Use of energy by moving object
If FMCW waveform is implemented for SRS, then power efficiency and uplink coverage are improved, but compatibility with existing OFDM-based systems decreases
Solution Approach 1:
The patent segments the SRS transmission into configurable parameters including waveform type selection, frequency resources, time resources, and bandwidth parts. This segmentation allows the network to dynamically configure FMCW waveforms for specific use cases while maintaining OFDM for other applications, thereby achieving compatibility across different system requirements and use cases.
Solution Approach 2:
The patent introduces capability indication mechanisms as intermediaries between the UE and network. The UE reports its FMCW capability to the network, and the network uses this information to appropriately configure FMCW or OFDM waveforms. This intermediary capability exchange layer enables smooth integration of FMCW technology while maintaining backward compatibility with existing OFDM-based systems.
3Productivity
If SRS resources are configured for multiple use cases, then positioning and sensing capacity are enhanced, but system complexity increases
Solution Approach 1:
The patent designs a universal FMCW-based SRS framework that can simultaneously support channel sounding, positioning, and sensing functions. By using a single waveform type for multiple purposes, the system enhances sensing and positioning capacity without proportionally increasing complexity, as the same physical layer procedures and signal processing techniques apply across all use cases.
Solution Approach 2:
The patent implements dynamic configuration of SRS resources where the network can flexibly allocate frequency resources, time resources, and bandwidth parts based on current network conditions and service requirements. This dynamic resource management allows the system to optimize for different use cases (positioning, sensing, channel sounding) as needed without requiring fixed, complex separate configurations for each function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed SRS design improves uplink communication coverage, enhances positioning accuracy, and increases sensing capacity with reduced power consumption, addressing the limitations of existing SRS technologies.
Implementation Method 1
a waveform of the one or more SRS resources is an orthogonal frequency division multiplexing (OFDM) compatible frequency modulated continuous wave (FMCW) waveform
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) transmits one or more sounding reference signal (SRS) resources, wherein a waveform of the one or more SRS resources is an orthogonal frequency division multiplexing (OFDM) compatible frequency modulated continuous wave (FMCW) waveform.