Author: Tao Yu

Passive Location Method Based on Phase Difference Measurement

eBook: US $69 Special Offer (PDF + Printed Copy): US $
Printed Copy: US $76
Library License: US $276
ISBN: 978-981-5079-43-2 (Print)
ISBN: 978-981-5079-42-5 (Online)
Year of Publication: 2022
DOI: 10.2174/97898150794251220101


Passive Location Method Based on Phase Difference Measurement presents groundbreaking information for developing passive positioning technologies. The author has put forward a series of innovative solutions from the perspective of engineering application theory with the aim of giving a basic understanding of the application of unambiguous phase difference localization techniques for long-range passive detection.

On the basis of the existing linear solution of the double basis path difference positioning equation and the analysis of its intrinsic properties, this book starts from the study of the phase difference measurement method of the phase difference change rate, puts forward the concept of the differential function of the path difference per unit wavelength length and also discovers its jump law. It provides a possible way to solve the problem of unambiguous phase difference measurement. These results are of great significance to the development of passive localization techniques based on unambiguous phase difference measurement.

Key Features:

- Sequentially presents theoretical frameworks to build the readers knowledge for better understanding the topics

- Presents a variety of unique method for solving kinematic positioning parameters and Doppler signal parameters by using unambiguous phase difference measurement.

- Presents a variety of direction-finding and ranging methods based on short baseline array and using unambiguous phase difference measurement technology, and exhibits the method of constructing long baseline two-station direction finding and ranging with short baseline array

- Presents a variety of two-station passive positioning methods based on angle measurement which are beneficial to improve the positioning accuracy on the basis of studying the relationship between the phase difference and angle

- Presents the means to convert Doppler detection to the non-fuzzy phase difference measure, for the localization problem in which it is difficult to use the phase difference localization equation directly, since the accuracy of the phase difference measurement is better than that of the Doppler frequency difference

- Presents a variety of new positioning methods and several novel concepts while demonstrating the theoretical exploration of passive location problem based on unambiguous phase difference measurement

This reference is a resource for scholars, engineers and technicians involved in radio positioning research and the improvement of radar, satellite navigation systems, unmanned systems and Internet of Things infrastructure.


The author began to work on radiolocation technology around 2005, when author joined the China Aeronautical Radio Electronics Research Institute. Working on radiolocation technology was only a fortuitous opportunity. In fact, the author had not done any research related to location technology before this time. But the author didn't do some specious writing, but hard work and research. And after five years, in the choice between continuing the research of positioning technology or changing careers again, I self-evaluated that I might be more suitable for positioning technology, and made a fruitful choice along with my own will.

Phase difference positioning is a branch of radio positioning technology. The author started to study phase difference positioning after 2010. The author can not remember what induced me to enter the research of phase-difference positioning technology at that time. The more I study, the more interesting I feel, and I am confident that I can achieve a more novel unambiguous phase difference positioning.

It may be difficult to solve the problems in Phase difference positioning equation with periodic variation by using conventional methods. The author's main innovative contribution on unambiguous phase difference positioning lies in:

1. The concept of the differential function of the path difference per unit wavelength length is put forward.

2. The jump law of the differential function is discovered and the method to correct the jump is found.

3. The results of the research on the intrinsic properties of symmetric arrays enhance the extended-application of the unambiguous phase difference positioning technique.

This monograph not only includes some of the author's existing research results, but also gives the author's many new opinions. I hope that this monograph will contribute to the development of phase difference passive localization technology.




The authors declare no conflict of interest, financial or otherwise.


Declared none.

Tao Yu
China institute of Aeronautical Radio Electronics