Transmit Signal Preprocessing for Matched-Filter Sensing Precision
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Solution Overview
Problem
Current communication systems experience a sensing performance loss due to filtering at the receive-end device, which hinders accurate sensing data acquisition.
Innovation Solution
The transmit-end device processes symbols using specific coefficients to generate signals that allow the receive-end device to perform matched filtering, reducing performance loss and improving sensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receive-end device performs filtering on echo signals, then the false alarm rate in target detection is reduced, but the sensing precision deteriorates
Solution Approach 1:
The transmit-end device performs preliminary processing on symbols using first coefficients before transmission. This preliminary action prepares the signal in advance so that when the receive-end device performs matched filtering, it can maintain both low false alarm rates and high sensing precision without the trade-off that previously existed
Solution Approach 2:
The patent introduces first coefficients as adjustable parameters that modify the symbol processing. By changing these parameters at the transmit end, the system optimizes the signal characteristics to achieve both reliable detection (low false alarms) and precise measurement simultaneously, resolving the contradiction between reliability and precision
2Reliability
If the receive-end device performs filtering on echo signals, then the reliability of target detection is improved, but the sensing performance deteriorates
Solution Approach 1:
The transmit-end device applies first coefficients to symbols before transmission, performing the optimization action in advance. This ensures that the signal arrives at the receiver already optimized for both reliability and information preservation, eliminating the need for aggressive filtering that would cause performance loss
Solution Approach 2:
The first coefficients act as an intermediary element between the symbol and the filtering process. By introducing this intermediate processing step at the transmit end, the system bridges the gap between needing reliable detection and preserving sensing performance, allowing both goals to be achieved
Data Source
AI summary
Embodiments of this application relate to the field of communication technologies, and provide a communication method and apparatus, to reduce a sensing performance loss caused by filtering introduced by a receive-end device. In the method, a first communication apparatus determines [d(h)] based on [a(h)], generates a first signal based on [d(h)], and sends the first signal, where an element in [a(h)] satisfies a first feature or satisfies a second feature, where the first feature is: when h is less than k, a(h) is less than a(h+1), or when h is greater than k, a(h) is less than or equal to a (h−1); and the second feature is: when h is less than k, a (h) is greater than a (h+1), or when h is greater than k, a(h) is greater than or equal to a (h−1).