A considerable amount of mobility data has been accumulated due to the proliferation location-based service. Nevertheless, compared with from transportation systems like GPS module in taxis, this kind is commonly sparse terms individual trajectories sense that users do not access mobile services and contribute their all time. Consequently, sparsity inevitably weakens practical value even it a high user penetration rate. To solve problem, we propose novel attentional neural network-based...

Abstract With the evolution of Global Navigation Satellite System (GNSS), new generation GNSS signals have adopted dual-frequency multiplexing modulation techniques, which jointly modulate multiple located on sub-frequencies into a Wideband Multiplexed Signal (WMS). Although WMSs were proposed initially to reduce complexity satellite transmitters and improve transmission efficiency signals, their multi-component structures wide root mean square bandwidths introduced by high-frequency...

In order to meet the demands of high-precision positioning and constraints limited spectrum resources, BeiDou Global Navigation Satellite System (BDS-3) has implemented advanced signal structures multiplexing techniques in B1 B2 bands. Specifically, signals adjacent subbands are dual-frequency multiplexed into Wideband Multiplexed Signal (WMS). The high-frequency complex subcarriers, serving as components, not only enable satellites achieve higher broadcast efficiency, but also show...

Various subcarrier modulations bring wider Gabor bandwidths and higher-precision ranging positioning potential to the new generation of Global Navigation Satellite System (GNSS) signals. However, they may also introduce intolerable ambiguity problems for signal tracking, ranging, positioning. In order take advantage high-precision subcarriers in modulated signals unambiguous positioning, we propose a Carrier Assisted Robust Unambiguous Positioning Technique (CARUPT), which consists Kalman...

To provide various and reliable Positioning, Navigation Timing (PNT) services for global users, the third-generation BeiDou Satellite System (BDS-3), which has been officially put into operation in 2020, broadcasts multiple signals on frequencies. Compared with traditional signals, BDS-3 Wideband Multiplexed Signals (WMS), composed of two located adjacent frequencies, have more components complex-value subcarriers higher thus having potential higher-precision ranging positioning. However,...

ABSTRACTIn this paper, semi-Markov process and adaptive fault-tolerant law are used to study the synchronization of complex networks in presence topology mutations actuator failures. Firstly, jump process, which is more practical than traditional Markov simulate change networks. Secondly, by designing controller, influence fault interference on system eliminated. Then, considering random packet loss caused network channel congestion limited bandwidth resources, a control strategy developed...

The third-generation BeiDou Navigation Satellite System (BDS-3) officially provided Positioning, Navigation, and Timing (PNT) services to global users in 2020. BDS-3 B1 band not only retains the B1I signal broadcast at 1561.098 MHz, but also a new B1C with advanced modulation 1575.42 which provides more various options for PNT service of band. In terms high-precision positioning, although Single Frequency Precise Point Positioning (SF-PPP) can provide centimeter-level positioning results, it...

A considerable amount of mobility data has been accumulated due to the proliferation location-based services. Nevertheless, compared with from transportation systems like GPS module in taxis, this kind is commonly sparse terms individual trajectories sense that users do not access mobile services and contribute their all time. Consequently, sparsity inevitably weakens practical value even if it a high user penetration rate. To solve problem, we propose novel attentional neural network-based...

In this research, we investigate the GNSS data availability in various bands. The results demonstrate support of different models and bands for BDS GPS signal. We show that pseudorange B1 band has been widely utilized smartphones, with manufactures adding B2 recent smartphones. However, smartphones dual-frequency carrier phase observation are scarace. It is observed geodetic receivers exhibit characteristics correlation between Carrier-to-Noise Ratio(CNR) elevation. Furthermore, average CNR...

As binary offset carrier (BOC) signals are widely used in global navigation satellite system (GNSS), tracking ambiguity threats and multipath become two main factors which affect ranging precision. Two-dimensional (2-D) loops, such as double estimate (DET) phase estimator (DPE), the code delay subcarrier by locked loop (DLL) (SLL), respectively, to obtain high precision unambiguous propagation delay. Although 2-D techniques can effectively alleviate impact of threats, their anti-multipath...

A considerable amount of mobility data has been accumulated due to the proliferation location-based service. Nevertheless, compared with from transportation systems like GPS module in taxis, this kind is commonly sparse terms individual trajectories sense that users do not access mobile services and contribute their all time. Consequently, sparsity inevitably weakens practical value even it a high user penetration rate. To solve problem, we propose novel attentional neural network-based...

Summary The article mainly studies the fault‐tolerant control of complex networks with semi‐Markov jump topology under hybrid attacks. First, process is imported to change sampled‐data networks. Second, by designing a strategy resist mixed attacks, system can remain stable even Then, some sufficient conditions have been established guarantee performance through mechanism if it suffers from actuator failure. Finally, numerical example and practical are used prove feasibility theory.