scholarly journals Widely tunable frequency-doubling microwaves generated using Brillouin-assisted carrier phase shift

2014 ◽  
Vol 63 (15) ◽  
pp. 154214
Author(s):  
Zheng Di ◽  
Pan Wei ◽  
Yan Lian-Shan ◽  
Luo Bin ◽  
Zou Xi-Hua ◽  
...  
Keyword(s):  
Phase Shift ◽  
Carrier Phase ◽  
Frequency Doubling ◽  
Tunable Frequency

Optically Tunable Frequency-Doubling Brillouin Optoelectronic Oscillator With Carrier Phase-Shifted Double Sideband Modulation

2012 ◽  
Vol 24 (12) ◽  
pp. 1051-1053 ◽  
Author(s):  
Bo Yang ◽  
Xiaofeng Jin ◽  
Hao Chi ◽  
Xianmin Zhang ◽  
Shilie Zheng ◽  
...  
Keyword(s):  
Carrier Phase ◽  
Frequency Doubling ◽  
Optoelectronic Oscillator ◽  
Tunable Frequency

Ambiguity Resolution in ZigBee Phase Shift Measurements Using MAFA Method

2017 ◽  
Author(s):  
Jacek Rapinski ◽  
Slawomir Cellmer ◽  
Joanna Janicka
Keyword(s):  
Phase Shift ◽  
Ambiguity Resolution ◽  
Carrier Phase ◽  
Standard Procedure ◽  
Wave Length ◽  
Functional Model ◽  
Single Wave ◽  
Satellite Positioning ◽  
Phase Data ◽  
Gnss Measurements

This paper presents ZigBee module that is used for ranging in indoor positioning. The system is using the phase shift measurements to determine the distances between user and anchors. The nature of phase shift measurements is causing the results to be in the range of a single wave length. Thus, as in GNSS measurements, appears the problem with ambiguity resolution. In satellite positioning this issue is well described but in range-based ZigBee positioning this problem needs to be solved. The standard procedure to find the correct values of ambiguities is to search for a combination of observation equations with smallest RMS. The authors propose a different solution – the Modified Ambiguity Function Approach (MAFA). It is a method of GNSS carrier phase data processing. In this method, the integer nature of ambiguities is taken into account in the functional model of the adjustment.

Sign in / Sign up

Export Citation Format

Share Document