Multi-Phase Digital Beamforming for Variable Sampling Rates
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Solution Overview
Problem
Existing digital beamforming systems face challenges in flexible and accurate signal sampling when the sampling rate exceeds the processing clock frequency, leading to inconveniences in signal processing.
Innovation Solution
A multi-channel, multi-phase digital beamforming method that involves pre-configuring a delay filtering coefficient storage table, calculating filter and weighting coefficients, and performing weighted synthesis and filtering processing to form a multi-phase digital beam, allowing for flexible signal processing without altering the processing architecture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the sampling rate of the array signal exceeds the processing clock frequency, then the signal processing capability is improved, but it becomes difficult to perform flexible and accurate signal sampling
Solution Approach 1:
The patent divides the high-rate signal into multiple lower-rate phases (e.g., 4 phases for 4x oversampling). Each phase is processed separately at the lower clock frequency, making sampling flexible and accurate while maintaining the ability to handle high data rates through parallel phase processing
Solution Approach 2:
The patent introduces a phase dimension to the signal processing architecture. By adding the phase index as an additional dimension alongside time and frequency, the system can handle high sampling rates through multi-phase parallel processing without requiring the entire system to operate at the high clock frequency
2Adaptability or versatility
If the quantity of signal phases is increased to handle higher sampling rates, then the adaptability to different data rates is improved, but the device complexity increases
Solution Approach 1:
The patent designs a universal multi-phase beamforming architecture that can handle multiple sampling rates (2x, 3x, 4x, etc.) using the same fundamental structure. The system adapts to different data rates by adjusting the number of phases and corresponding coefficients rather than requiring different hardware architectures for each sampling rate
Solution Approach 2:
The patent achieves adaptability to different sampling rates by changing parameters (number of phases, delay values, filtering coefficients) rather than changing the fundamental processing architecture. This allows flexible adaptation while maintaining architectural simplicity
Data Source
AI summary
A multi-channel multi-phase digital beamforming method and apparatus is provided. The multi-channel multi-phase digital beamforming method includes following steps: S1: pre-configuring a delay filtering coefficient storage table; S2: calculating a filter coefficient and a weighting coefficient; and S3: performing weighted synthesis and filtering processing on a multi-phase signal to form a multi-phase digital beam. When a data rate of an input signal changes, the multi-channel multi-phase digital beamforming method can perform weighted synthesis for the signal at different sampling rates by changing a quantity of signal phases without changing a processing architecture. Based on a multi-phase finite impulse response (FIR) filtering technology, a fractional multiple delay processing architecture that can flexibly adapt to a plurality of phase quantities of the input signal is proposed.