Performance Evaluation of the New Compound-Carrier-Modulated Signal for Future Navigation Signals

Luo, Ruidan; Xu, Ying; Yuan, Hong

doi:10.3390/s16020142

Cited by 10 publications

(5 citation statements)

References 18 publications

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“…It is known that DLL bias caused by multipath can be evaluated by the multiPath error envelope (MPEE) below (Liu and Amin, 2009;Luo et al, 2016)…”

Section: Bias From Multipathmentioning

confidence: 99%

“…The global navigation satellite system (GNSS) is widely used in military and civilian areas for position, velocity and time (PVT). Due to its weak power when reaching the Earth's surface, GNSS signal is very vulnerable to various intentional and unintentional interferences (Sahmoudi and Amin, 2009; Amin et al., 2016; Fernandez-Prades et al., 2016; Fohlmeister et al., 2017; Appel et al., 2019; García-Molina and Fernández-Rubio, 2019; Sgammini et al., 2019). Among these, the ubiquitous multipath is notably difficult to address, especially for mobile devices operating in urban areas (Hsu et al., 2015; Xie and Petovello, 2015; Sun et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

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A cost-effective beam forming structure for global navigation satellite system multipath mitigation and its assessment

Jia

Hsu

et al. 2020

J. Navigation

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Array antenna beam forming has high potential to improve the performance of the global navigation satellite system (GNSS) in urban areas. However, the widespread application of array antennas for GNSS multipath mitigation is restricted by many factors, such as the complexity of the system, the computation load and conflicts between required performance, cost budget and limited room for the antenna placement. The scope of this work is triplicate. (1) The pre-correlation beam forming structure is first suggested for multipath mitigation to decrease the system complexity. (2) With the pre-correlation structure, the equivalence of adaptive beam forming to quiescent beam forming is revealed. Therefore, the computational load for beam forming is greatly decreased. (3) A theoretical model is established to link the benefits of beam forming with GNSS performance improvement in terms of pseudorange quality. The model can be used by industry to balance the aforementioned restrictions. Numerical results with different array settings are given, and a 2 × 2 rectangle array with $0.4\lambda $ element spacing is suggested as a cost-effective choice in GNSS positioning applications in urban canyon areas.

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“…It is known that DLL bias caused by multipath can be evaluated by the multiPath error envelope (MPEE) below (Liu and Amin, 2009;Luo et al, 2016)…”

Section: Bias From Multipathmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A cost-effective beam forming structure for global navigation satellite system multipath mitigation and its assessment

Jia

Hsu

et al. 2020

J. Navigation

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“…Subsequent innovations for GNSS signal design have mainly focused on spectrum-efficient modulations, particularly such as square root-raised cosine (SRRC) [9], prolate spheroidal wave functions (PSWF) [13], [14], complex carrier modulation [15], orthogonal frequency division multiplexing (OFDM) [16], [17], and filtered multitoned (FMT) modulation [18]. Although abovementioned modulations preserve spectral compactness well, their envelopes are not constant intrinsically, resulting in the nonlinear signal distortion at the high power amplifier (HPA) output if not considering peak to average power ratio (PAPR) reduction or constant-envelope multiplexing technique [19].…”

Section: Introductionmentioning

confidence: 99%

Optimal Parameter Design of Continuous Phase Modulation for Future GNSS Signals

Sun¹

2021

IEEE Access

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Continuous phase modulation (CPM) is a power and spectrum efficient modulation that intrinsically possesses constant envelope, phase continuity as well as less out of band (OOB) radiation, especially appropriate for stringently bandwidth-constrained systems employing non-linear power amplifiers. Such advantages render CPM as a promising modulation candidate with application to satellite navigation. CPM comprising of a few parameters has large amounts of modulation subclasses. This paper is devoted to optimal parameter design of CPM for future GNSS signals. Parameter design approaches endowing CPM with similar spectrum profiles as legacy binary offset carrier (BOC) and binary phase shift keying (BPSK) modulations are also proposed. Several optimal subclasses of CPM family are suggested as unimodal or bimodal GNSS signal solutions. The simulation results indicate that the designed CPM signals behave same or similar main lobes with BPSK and BOC signals, and proposed optimal subclasses of CPM family with high spectral efficiency are comparable or superior than legacy modulations, typical GMSK, and filtered multitone (FMT) signal using the squared root raised-cosine (SRRC) basic pulse in terms of tracking accuracy, multipath mitigation and compatibility. In addition, some constructive comments on CPM design are presented, which provides a reference for CPM applications in GNSS.

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“…Ruidan Luo et al proposed a navigation modulation method based on a multi-carrier composite carrier. Compared with the existing modulation signal, it has outstanding performance in terms of tracking accuracy, anti-interference, and spectrum utilization and can even be used as a signal for a ground-based augmentation system [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

A Novel Signal Design and Performance Analysis in NavCom Based on LEO Constellation

Liu

Chen

et al. 2021

Sensors

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The mega-launch of low Earth orbit satellites (LEOs) represents a critical opportunity to integrate navigation and communication (NavCom), but first, challenges related to signal design must be overcome. This article proposes a novel signal scheme named CE-OFDM-PM. Via research on the in-band or adjacent band, it was found that the proposed signal scheme was suitable for S-band and had a wide normalized power spectrum density (PSD), high peak-to-side lobe ratio (PSR), and multiple peaks in autocorrelation. In an analysis of the simulation performance evaluation in navigation and communication, it is found that the proposed signal scheme has the potential for high accuracy, a code tracking accuracy of up to 0.85 m, a small mutual influence between the proposed signal scheme and other schemes, excellent anti-interference properties, and a better performance at both short and long distances in terms of its anti-multipath capability. Furthermore, the proposed signal scheme shows the ability to communicate between satellites and the ground and is outstanding in terms of its bit error rate (BER), CNR, and energy per bit to noise power spectral density ratio (Eb/N0). From the technical, theoretical, and application perspectives, our proposed signal scheme has potential as an alternative scheme in future BDS, PNTs, and even 5G/B5G.

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Performance Evaluation of the New Compound-Carrier-Modulated Signal for Future Navigation Signals

Cited by 10 publications

References 18 publications

A cost-effective beam forming structure for global navigation satellite system multipath mitigation and its assessment

A cost-effective beam forming structure for global navigation satellite system multipath mitigation and its assessment

Optimal Parameter Design of Continuous Phase Modulation for Future GNSS Signals

A Novel Signal Design and Performance Analysis in NavCom Based on LEO Constellation

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