Radar Waveform Generation Using Segmented Modulation Elements
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Solution Overview
Problem
Radar systems with modulated voltage sources face reduced transmission rates due to voltage relaxation periods, limiting the maximal detected velocity and angular resolution, as each transmitter element requires a shared modulation element, causing additional delays between transmissions.
Innovation Solution
Configuring each transmitter element with a separate modulation element allows for simultaneous transmission during another element's relaxation period, eliminating the need for reduced transmission rates by using distinct waveform generation devices for each antenna, enabling continuous operation without additional delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared modulation element is used for multiple transmitter elements, then device complexity is reduced, but transmission rate decreases due to voltage relaxation periods
Solution Approach 1:
The patent divides the shared modulation element into separate modulation elements for each transmitter element. Each waveform generation device includes its own dedicated modulation element, eliminating the need for voltage relaxation periods between transmissions from different antennas. This segmentation allows simultaneous waveform generation for multiple transmit elements without interference.
Solution Approach 2:
Each waveform generation device prepares its waveform in advance using its own modulation element before transmission is needed. The modulation element generates the complete waveform including any necessary relaxation periods independently, so that when the waveform is transmitted, no additional relaxation time is required from shared resources.
2Reliability
If transmission rate is reduced to account for voltage relaxation periods, then waveform quality is maintained, but maximal detected velocity decreases
Solution Approach 1:
By assigning dedicated modulation elements to each transmitter element, the system eliminates the need to reduce transmission rate. Each waveform generation device independently manages its own modulation and relaxation timing, allowing transmissions to occur at maximum rate without compromising waveform quality or causing interference between channels.
Solution Approach 2:
The system maintains continuous transmission capability by having each waveform generation device operate independently with its own modulation element. There are no interruptions or delays in the transmission stream caused by voltage relaxation periods from shared resources, enabling continuous operation at maximum transmission rate for optimal velocity detection.
3Measurement precision
If multiple transmitter elements use TDMA scheme with different waveforms, then target detection accuracy is improved, but transmission rate is reduced due to sequential transmission requirements
Solution Approach 1:
The patent implements segmentation by providing each transmitter element with its own waveform generation device and modulation element. This allows each element to generate and transmit its unique waveform simultaneously without requiring sequential TDMA scheduling, thereby maintaining both target detection accuracy through waveform differentiation and high transmission rate through parallel operation.
Data Source
AI summary
A radar system and method of configuring a radar system that includes two or more antennas to transmit a respective transmit waveform. Two or more waveform generation devices include respective modulation elements. Each of the two or more waveform generation devices has a one-to-one correspondence with one of the two or more antennas, and each of the two or more waveform generation devices generates the respective transmit waveform for a first period of time and generates an arbitrary response for a second period of time.