OFDM Vehicle Location Estimation Using MIMO Antenna
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current vehicle location sensing and identification technologies face challenges in accuracy and interference, particularly in V2X communication systems, where separate radar devices are often required and interference from other vehicles can occur.
Innovation Solution
An adaptive optimal filtering system utilizing a MIMO antenna array and OFDM device, which eliminates the need for a separate radar system by transmitting pilot signals and calculating time delays to estimate vehicle location through multiple communication standards like 4G, 5G, 4G-LTE, and Wi-Fi, using match-filtering, crosstalk-cancelling, and radar-processing units to separate and analyze echo signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate radar device is used for vehicle location sensing, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the radar functionality with the existing OFDM communication device by integrating the transceiver and antenna array. The same hardware infrastructure used for V2X communication is leveraged to perform location estimation, eliminating the need for a separate radar device while maintaining measurement precision through signal processing techniques.
Solution Approach 2:
The OFDM communication device is designed to serve multiple functions: both V2X communication and vehicle location estimation. By making the communication device multi-functional, the system achieves accurate location sensing without adding dedicated radar hardware, thus reducing overall device complexity while preserving measurement capabilities.
2Measurement precision
If multiple V2X transceivers are deployed for tracking multiple targets, then measurement precision is improved, but object-generated harmful factors increase
Solution Approach 1:
The patent converts the harmful interference from multiple V2X transceivers into a beneficial signal for multi-target detection. By using the interference-carrying communication signals as the basis for location estimation, the system achieves accurate tracking of multiple targets while utilizing the existing transceiver network, thereby transforming the harmful multi-transceiver interference into a useful resource for enhanced measurement precision.
Solution Approach 2:
The patent introduces signal processing techniques as intermediaries to separate and identify individual target signals from the combined interference. Through advanced processing methods, the system can distinguish and track multiple targets even when their signals are mixed and interfering with each other, thus resolving the contradiction between using multiple transceivers and managing interference.
3Adaptability or versatility
If varying communication wave technologies are used, then adaptability is improved, but device complexity increases
Solution Approach 1:
The OFDM device is designed with universal signal processing capabilities that can handle multiple communication standards (4G, 5G, Wi-Fi) through a unified framework. This multi-functional design allows the system to adapt to varying communication wave technologies without requiring separate processing chains for each standard, thereby maintaining adaptability while controlling device complexity through architectural efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances vehicle location estimation and identification accuracy, reduces interference, and eliminates the need for a separate radar device, enabling precise tracking of multiple targets using varying communication wave technologies.
Implementation Method 1
transmitting pilot signals and calculating time delays to estimate vehicle location through multiple communication standards like 4G, 5G, 4G-LTE, and Wi-Fi
Implementation Method 2
separate and analyze echo signals
Data Source
AI summary
A method for vehicle location estimation using orthogonal frequency-division multiplexing (OFDM) is provided with an OFDM device that consists of a wireless terminal and a multiple-input and multiple-output (MIMO) antenna. A pilot uplink signal is transmitted towards from the wireless terminal towards the intended target which is within an operational range of the MIMO antenna. Upon contacting the intended target and a plurality of target-surrounding objects, a plurality of return signals is generated to be received by the wireless terminal. A plurality of echo signals that was reflected from the plurality of target-surrounding objects is separated so that a time delay between the pilot uplink signal and the plurality of echo signals can be determined. The time delay along with a direction of arrival determined through the MIMO antenna are used to derive a location approximation for the intended target.