Non-Coherent Radar Clock Synchronization for Full-Duplex
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Solution Overview
Problem
Conventional radar systems with non-coherent transceiver units face challenges in measuring distance and relative speed due to spatial separation, requiring expensive correction steps and high bandwidth, which complicates efficient multiplexing and digital processing.
Innovation Solution
The radar method synchronizes clock sources of non-synchronous transceiver units before a full-duplex measuring process, maintaining constant time and frequency offsets to reduce the need for expensive correction steps and data quantity, allowing precise distance and speed measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-coherent transceiver units with independent clock sources are used for spatially separated radar measurement, then the system can operate with distributed transceiver units, but expensive correction steps and high bandwidth are required for digital processing
Solution Approach 1:
The patent applies preliminary action by synchronizing the clock sources of distributed transceiver units before they engage in full-duplex signal exchange. This pre-synchronization establishes a reference relationship between the clock sources, allowing the system to maintain distributed operation while avoiding the need for expensive post-processing corrections. The synchronization is performed once initially, and then the transceiver units can operate independently with reduced computational burden.
2Length of stationary object
If non-synchronous clock sources are used in distributed transceiver units, then spatial separation is enabled, but chronological drift between signals requires expensive correction steps
Solution Approach 1:
The patent performs clock synchronization as a preliminary action before the transceiver units engage in measurement operations. This initial synchronization establishes a reference relationship between the clock sources, allowing them to maintain consistent timing relationships over distance. The synchronization includes exchanging timing information and adjusting clock phases/frequencies to minimize drift, thereby enabling spatial separation while maintaining signal timing precision without expensive continuous corrections.
Solution Approach 2:
The patent implements feedback mechanisms where transceiver units continuously monitor and adjust their clock sources based on timing information exchanged with other units. This feedback loop compensates for chronological drift that occurs during operation, maintaining synchronization accuracy despite spatial separation. The system uses the exchanged signals to detect timing offsets and applies corrective adjustments to keep the clocks synchronized.
3Productivity
If full-duplex signal exchange is performed without preliminary synchronization, then simultaneous two-way communication is achieved, but the occupied frequency band increases and requires high bandwidth
Solution Approach 1:
The patent performs clock synchronization as a preliminary action before enabling full-duplex signal exchange. This pre-synchronization aligns the clock frequencies and phases of transmitting and receiving units, ensuring that the exchanged signals maintain consistent frequency relationships. As a result, the occupied frequency band remains controlled and predictable, allowing simultaneous two-way communication without requiring excessive bandwidth or frequency separation.
Data Source
AI summary
The invention relates to a radar method for exchanging signals between at least two non-coherent transceiver units which respectively have initially non-synchronous, in particular controllable, clock sources, having the following steps: a synchronization in which clock offsets and/or clock rates of the clock sources of the at least two transceiver units are adapted; a full-duplex measuring process in which a first transmission signal of the first transceiver unit is transmitted to the second transceiver unit and a second transmission signal of the second transceiver unit is transmitted to the first transceiver unit via a radio channel; with synchronization prior to the full-duplex measuring process being carried out in such a way that a time offset and/or a frequency offset between the transmission signals at least substantially remain(s) constant during a transmission time of the full-duplex measuring process.