Radar Data Cube Interleaving for Parallel Range and Doppler Processing
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Solution Overview
Problem
Traditional radar processing methods for MIMO systems underutilize computing resources and restrict Doppler processing to a small window of time due to sequential memory operations, leading to inefficient processing and longer look periods.
Innovation Solution
Interleaving range and Doppler processing by allowing Doppler processing to occur in parallel with range processing using a data cube that is accessed differently from one look period to the next, utilizing processor idle times to finish Doppler processing for previous periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sequential memory operations are used for range and Doppler processing, then data processing is completed in a structured manner, but processor utilization is low and processing time is extended
Solution Approach 1:
The patent applies preliminary action by performing Doppler processing for a previous look period during the range processing of the current look period. Specifically, the processor completes Doppler processing for prior data before the current range processing begins, effectively using idle time from previous operations to advance current processing tasks. This overlapping of operations increases processor utilization and reduces overall processing time while maintaining data integrity through proper memory addressing sequences.
2Productivity
If Doppler processing is restricted to a small window of time, then memory operations are simplified, but processing resources are underutilized
Solution Approach 1:
The patent applies segmentation by dividing the data cube access into distinct row-based and column-based operations corresponding to range and Doppler processing phases. The processor sequentially fills rows for range processing and then reads columns for Doppler processing, creating clear operational segments. This segmentation simplifies memory operation management while enabling resource utilization through temporal overlapping of different segments across successive look periods.
3Duration of action of moving object
If traditional sequential processing is used, then data cube memory access is straightforward, but look period duration is extended
Solution Approach 1:
The patent applies continuity of useful action by ensuring that the processor remains continuously productive through overlapping range and Doppler processing across successive look periods. Doppler processing for one look period continues into the next look period's range processing time, eliminating idle periods. This continuous utilization of processing resources reduces the overall look period duration while maintaining processing efficiency through systematic memory access patterns.
Data Source
AI summary
Described are techniques for interleaving range and Doppler radar processing. A data cube is memory accessed differently, from one look period to the next, which allows Doppler processing for a current look period to happen in parallel with range processing for a next look period. Range processing for a first look period writes to rows of the data cube; Doppler processing reads from and empties its columns. But before Doppler processing can finish, a second look period begins. Rather than re-writing to the rows, range processing in the second look period writes to the columns just emptied by the ongoing Doppler processing. Doppler processing for the first look period is allowed to finish by executing during processing idle times in the second period, e.g., in-between chirps. With better processor utilization, Doppler processing is afforded more time to do its complex operations, while keeping look periods as short as possible.