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Wireless Location That No One Knows: How to Use Radio Waves to Find Hidden Objects?
With the advancement of science and technology, wireless positioning technology has become an indispensable tool in all walks of life. Whether it is military activities, industrial applications, or even mobile phone positioning in daily life, the wireless positioning technology that no one knows about continues to help people find hidden objects in ways that are beyond your imagination.
Basic Principles
Wireless positioning technology, also known as radiation positioning, mainly determines the location information of an object by measuring the characteristics of received radio waves. During this process, the emitted radio waves may come from the object being located, or they may be reflected waves (such as radar or passive RFID). When objects emit radio waves, receivers are able to detect these waves and locate them using a variety of techniques.
Using the difference in wireless signal strength to measure distance, or calculating based on known propagation speed and transmission time, is also an effective positioning method.
Application of various positioning technologies
In wireless positioning, technologies such as time of arrival (TOA) and angle of arrival (AOA) improve the accuracy of location detection. TOA technology involves the known time and speed of transmission and is able to perform positioning when multiple receivers are from different known locations. This technique is also often combined with the use of multiple receivers, which is called multilateration.
However, in most real-world environments, numerous obstacles such as buildings and mountains affect signal transmission, causing multipath distortion and leading to challenging results.
With the complexity of the urban environment, the strength of the signal varies with the relative position between the transmitter and the receiver, making the positioning accuracy of a single receiver limited.
Wireless Positioning in Mobile Phones
Mobile phones use similar technology for positioning, usually using trilateration from base stations to determine the location of the caller or handset. The main positioning methods include angle of arrival (AOA), time of arrival (TOA) and location signature.
The development of these technologies is not only used for public safety, but also can provide location-based services to help lost people find their way.
International Standards and Technical Classifications
The International Telecommunication Union (ITU) has given clear definitions and classifications for wireless positioning technologies, which can help countries with spectrum management and allocation. According to relevant specifications, wireless positioning services are divided into different types such as wireless positioning services and satellite wireless positioning services.
Future Challenges and Opportunities
With the rapid advancement of wireless technology, future wireless positioning technology will face many challenges, including channel congestion and transmission power limitations. At the same time, new technologies such as ultra-wideband (UWB) have the potential to provide more accurate positioning in urban environments.
This has led people to think about the future of wireless positioning technology. Will wireless positioning become more accurate and have a wider range of applications as technology develops?
