4 citations · 9 across the 6 of their papers we have counts for
6 papers
Multipath Error Correction in Radio Interferometric Positioning Systems
Cheng Zhang, Wangdong Qi, Li Wei +2
The radio interferometric positioning system (RIPS) is an accurate node localization method featuring a novel phase-based ranging process. Multipath is the limiting error source fo…
On the Unambiguous Distance of Multi-Carrier Phase Ranging with Random Hopped Frequencie
Peng Liu, Wangdong Qi, Yue Zhang +1
In a multi-carrier phase ranging (MPR) system, the distance that radio signal travels is estimated through phase shift of multiple carrier frequencies. Due to phase ambiguity, a un…
Full Duplex Joint Sensing for Opportunistic Access in Spectrum-Heterogeneous Cognitive Radio Networks
Peng Liu, Wangdong Qi, Li Wei +2
In cognitive radio networks (CRN), secondary users (SUs) can share spectrum with licensed primary users (PUs). Because an SU receiver (SU-Rx) does not always share the same view of…
Closed-form, robust and accurate multi-frequency phase unwrapping: frequency design and algorithm
Li Wei, Wangdong Qi
A closed-form algorithm, named "concerto", is proposed for phase-based distance estimation in multi-frequency phase unwrapping (MFPU) system. The concerto method consists of three…
Optimal sequencing of a set of positive numbers with the variance of the sequence's partial sums maximized
Li Wei, Wangdong Qi, Dingxing Chen +2
We consider the problem of sequencing a set of positive numbers. We try to find the optimal sequence to maximize the variance of its partial sums. The optimal sequence is shown to…
Optimization in Multi-Frequency Interferometry Ranging: Theory and Experiment
Li Wei, Wangdong Qi
Multi-frequency interferometry (MFI) is well known as an accurate phase-based measurement scheme. The paper reveals the inherent relationship of the unambiguous measurement range (…