IR-UWB Multi-Antenna Receiver Time Delay Signal Separation
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Solution Overview
Problem
Traditional multi-antenna receivers for Angle of Arrival (AoA) measurement in IR-UWB systems face challenges in utilizing the gains of multiple antennas while avoiding aliasing and interference among signals with different phases, leading to reduced performance.
Innovation Solution
An impulse radio ultra wideband multi-antenna time delay receiver is designed with M antennas, each connected to a radio frequency path with a time delayer introducing configurable time delays, allowing for simultaneous aggregation and separation of signals in the time domain, enabling diversity reception and precise AoA estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If antenna time division switching manner is adopted to avoid mutual aliasing and interference, then signal interference is reduced, but antenna gains are lost
Solution Approach 1:
The patent divides the signal processing into separate time slots for each antenna, with time delayers segmenting the received signals in the time domain. Each antenna's signal is processed in a dedicated time window, preventing mutual interference while maintaining all antenna connections throughout the reception period.
Solution Approach 2:
The patent implements dynamic time delay adjustment through configurable time delayers that can be adapted to different antenna positions and signal characteristics. The time delay parameters are dynamically set to optimize signal separation for each antenna while maintaining continuous connectivity.
2Reliability
If multiple antennas receive signals simultaneously, then antenna gains are achieved, but mutual aliasing and interference occur
Solution Approach 1:
The patent employs periodic time slot allocation for each antenna, where signals from different antennas are assigned to different periodic time windows. This periodic separation in the time domain allows simultaneous antenna operation while maintaining clear signal distinction through configured time delays.
Solution Approach 2:
The patent changes the time domain parameters of received signals by introducing configurable time delays for each antenna path. This parameter modification separates overlapping signals in time without affecting the spatial arrangement or connectivity of the antenna array.
3Measurement precision
If antenna time division switching is used to prevent signal aliasing, then signal clarity is improved, but system complexity increases
Solution Approach 1:
The patent extracts the time division switching function from the physical antenna connection domain and implements it in the signal processing domain through time delayers. This removes the need for physical switching mechanisms while achieving the same signal separation effect through digital/time-domain processing.
Solution Approach 2:
The patent replaces mechanical or physical antenna switching with a time-delay-based signal processing system. Instead of physically connecting/disconnecting antennas through switches, the system uses configurable time delayers to achieve virtual switching in the time domain, eliminating mechanical complexity.
Data Source
AI summary
An impulse radio ultra wideband multi-antenna time delay receiver and a method for acquiring an angle of arrival based on the same are disclosed. The receiver includes M antennas, M radio frequency paths, an analog front end, an analog-digital converter and a digital processing unit, wherein each antenna is correspondingly connected with one of the radio frequency paths, output ends of all the M radio frequency paths are connected with the analog front end, an output end of the analog front end is connected with an input end of the analog-digital converter, and an output end of the analog-digital converter is connected with the digital processing unit, wherein the radio frequency path corresponding to the mth antenna is provided with a time delayer, 1<m≤M, and m and M are respectively natural numbers greater than 1.