NR Sensing OFDM Symbols Using ZC Codes to Reduce Self-Interference
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Solution Overview
Problem
Existing synchronization signals in NR systems are not designed for efficient sensing of surrounding objects and environments, leading to inefficiencies and interference between sensing OFDM symbols.
Innovation Solution
Generating a sensing signal by spreading a Zadoff-chu (ZC) code sequence into an orthogonal code, performing OFDM transform, and transmitting through multiple antennas to create sensing OFDM symbols, while employing methods to reduce self-interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If existing synchronization signals are used for sensing, then device complexity is reduced, but sensing performance and measurement precision deteriorate
Solution Approach 1:
The patent changes the code sequence parameters by using Zadoff-Chu codes with specific root indices and spreading codes to create sensing signals with optimal autocorrelation properties, thereby improving sensing performance while maintaining system complexity at acceptable levels
Solution Approach 2:
The patent segments the sensing signal into multiple OFDM symbols with different time-domain representations, allowing the system to achieve good sensing performance by selecting appropriate segments while controlling overall device complexity
2Productivity
If sensing OFDM symbols are transmitted continuously, then productivity is improved, but interference between symbols increases
Solution Approach 1:
The patent employs periodic action by transmitting sensing OFDM symbols at regular intervals rather than continuously, allowing the system to maintain high productivity through efficient symbol utilization while reducing self-interference by creating temporal separation between sensing operations
Solution Approach 2:
The patent applies preliminary action by pre-configuring the time-domain representation of sensing OFDM symbols and pre-calculating the appropriate spreading codes, which enables the system to achieve high detection efficiency while minimizing self-interference through proper signal structure design
Data Source
AI summary
According to an aspect of the present disclosure, provided is a method for transmitting and receiving a sensing signal in a new radio (NR) system, including: spreading a Zadoff-chu (ZC) code sequence into an orthogonal code in a transmitting device to generate a sensing code sequence; generating a sensing OFDM symbol by performing an OFDM (Orthogonal Frequency Division Multiplexing) transform on the sensing code sequence; and transmitting a communication symbol and the sensing OFDM symbol through a plurality of antennas. Embodiments of the present disclosure may generate and transmit a sensing signal for sensing an surrounding object and an environment, and efficiently reduce interference between sensing OFDM symbols when receiving the sensing signal.