Changqing Song

ORCID: 0000-0002-6101-1331
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Full-Duplex Wireless Communications
  • Wireless Communication Security Techniques
  • Cooperative Communication and Network Coding
  • Electromagnetic Compatibility and Measurements
  • Advanced MIMO Systems Optimization
  • Power Line Communications and Noise
  • 3D Surveying and Cultural Heritage
  • Remote Sensing and LiDAR Applications
  • Radar Systems and Signal Processing
  • Advanced Wireless Communication Techniques
  • Ultra-Wideband Communications Technology
  • Wireless Communication Networks Research
  • Security in Wireless Sensor Networks
  • Advanced Wireless Communication Technologies
  • Energy Harvesting in Wireless Networks
  • Wireless Signal Modulation Classification
  • Vehicle License Plate Recognition
  • Satellite Image Processing and Photogrammetry
  • PAPR reduction in OFDM
  • Antenna Design and Optimization
  • Radio Frequency Integrated Circuit Design
  • Remote Sensing in Agriculture
  • 3D Modeling in Geospatial Applications
  • Physical Unclonable Functions (PUFs) and Hardware Security
  • Advanced Photonic Communication Systems

University of Electronic Science and Technology of China
2020-2025

General Hospital of Shenyang Military Region
2024

Old Dominion University
2004

The artificial noise (AN) shielded frequency-hopping (FH) architecture can effectively resist wiretapping and electromagnetic interference, but its wide hopping bandwidth will raise a non-negligible in-phase quadrature (IQ) imbalance at transceiver oscillators, yielding significant signal distortions during IQ mixing. Considering this, first, raised by imbalances are modelled in this study, their characteristics mathematically investigated as well. Next, the to distortion-plus-noise ratio...

10.1109/tsp.2022.3179209 article EN IEEE Transactions on Signal Processing 2022-01-01

The orthoimage usually serves as a valuable base layer in GIS. With an increasing demand many urban GIS applications, orthoimages areas are required to represent spatial objects their true positions. However, the traditional methods for generation did not consider features (e.g. occlusion, shadow, etc.) of bridges and buildings), resulting that created cannot be located This paper presents our research experimental results extremely tall using lidar multi-view large-scale aerial images....

10.1080/01431160410001705079 article EN International Journal of Remote Sensing 2004-10-01

In physical layer security, imperfect time synchronization results in random mismatch between the received cooperative jamming (CJ) and reconstructed CJ, leading to performance degradation of CJ cancellation at authorized receiver. this letter, with is analyzed evaluated by ratio (JCR). Then, assuming that timing error uniformly distributed within accuracy, expectation cumulative distribution function (CDF) JCR are provided. Experimental confirm theoretical analysis causes dramatic...

10.1109/lwc.2020.3030075 article EN IEEE Wireless Communications Letters 2020-10-12

Ambient backscatter (AB) communication enables the devices to modulate and transmit data by reflecting surrounding digital video broadcasting (DVB) signals, has emerged as a promising solution connect low-power small-sized in Internet of Things (IoT). Unfortunately, AB receiver may suffer from strong direct-link interference (DLI) transmitted ambient DVB station, making it difficult decode backscattered signal (BS) directly. In this paper, tackle issue, we propose DLI cancellation method for...

10.1109/tbc.2022.3142962 article EN IEEE Transactions on Broadcasting 2022-01-19

To further protect frequency-hopping (FH) systems against severe wiretapping, an architecture of artificial noise (AN) shielded FH (ANS-FH) is proposed, wherein AN cancellation utilized at the authorized receiver, and secrecy performance analyzed in presence eavesdropper. First, inter-frequency interference (IFI) model employed to depict residual after cancellation. Then, tolerable range frequency deviation given, signal plus ratio (SANR) provided measure performance. Finally, using capacity...

10.1109/lwc.2021.3064300 article EN IEEE Wireless Communications Letters 2021-03-08

To protect military broadcasting against both hostile interference and eavesdropping, an artificial noise (AN) sheltered frequency hopping (FH) (ANS-FHB) architecture is proposed in this paper, the secrecy capacity employed to measure its performance. Besides, considering inevitable mismatch after synchronization will degrade system practical applications, optimal transmitting power allocation (PA) for confidential information (CI) AN provided maximize presence of mismatch. Moreover, be...

10.1109/tbc.2021.3110410 article EN IEEE Transactions on Broadcasting 2021-09-09

A segmented self-interference cancellation (SSIC) method is proposed for frequency-modulated continuous-wave phased-array radar canceling wideband multipath (SI) signals. radio frequency canceller based on the SSIC that uses time-frequency segmentation equivalence of linear (LFM) signal designed can convert SI (SIC) into several narrowband SICs. Numerical and simulation results show achieve better performance with lower hardware complexity than conventional multi-tap (MTSIC) method....

10.1109/access.2020.3044959 article EN cc-by IEEE Access 2020-01-01

In single-input multi-output (SIMO) systems, imperfect time alignments result in random mismatch among the signals at receiving antennas, leading to performance degradation of maximum ratio combining (MRC). this letter, by considering timing errors each antenna, closed-form expression output signal-to-noise (SNR) after performing MRC is calculated, and its statistical properties are investigated. Theoretical simulation results show that alignment significantly degrades SNR, especially for...

10.1109/lwc.2020.2989313 article EN IEEE Wireless Communications Letters 2020-04-21

This paper adopts an artificial noise (AN) shielded frequency hopping (FH) architecture to counteract both wire-tapping and hostile attack, but the inevitable phase will degrade AN cancellation secrecy performance. Considering this, first, performance is analyzed by separating received into cancellable common component (CPC) non-cancellable inter-carrier interference (ICI). On top of system via capacity, degradation for extracted in terms 3 dB coherence bandwidth adopted oscillators,...

10.1109/gcwkshps52748.2021.9682033 article EN 2022 IEEE Globecom Workshops (GC Wkshps) 2021-12-01

Full-duplex technology can effectively alleviate the problem of tight spectrum resources at battlefields, but non-ideal self-interference (SI) cancellation full-duplex nodes worsens signal reception quality. Considering phase noise is major limiting factor SI performance, in this paper, a scenario with independent transceiver oscillators considered, multiple mathematically modelled, distortions for extracted frequency domain, and closed-form expressions signal-to-noise ratios (SNRs) are...

10.1109/milcom58377.2023.10356256 article EN MILCOM 2022 - 2022 IEEE Military Communications Conference (MILCOM) 2023-10-30

10.1109/iccworkshops59551.2024.10615260 article EN 2022 IEEE International Conference on Communications Workshops (ICC Workshops) 2024-06-09

To further enhance the security of wireless communication systems, an architecture cooperative jamming (CJ) assisted slow frequency-hopping (FH) systems is proposed in this paper. Then, after CJ cancellation operation, residual raised from synchronization error analyzed, where inter-symbol interference (ISI) employed to depict time misalignment between received signal and local reference at receiver, inter-hop (IHI) introduced describe frequency misalignment. In addition, closed-form...

10.1109/globecom42002.2020.9322646 article EN GLOBECOM 2022 - 2022 IEEE Global Communications Conference 2020-12-01

In the communication systems employing cooperative jamming (CJ), frequency mismatch will degrade its suppression performance. This paper aims to investigate performance degradation of CJ sheltered hopping (FH) under unknown mismatch. First, system transceiver architecture is detailed illustrated. Then, residual after mathematically depicted, and closed-form expression for ratio (CJSR) provided. Finally, expectation cumulative distribution function (CDF) CJSR are derived measure Theoretical...

10.1109/iccworkshops50388.2021.9473686 article EN 2022 IEEE International Conference on Communications Workshops (ICC Workshops) 2021-06-01

In spread spectrum systems, the performance of time synchronization determines communication quality, whereas existing algorithms do not consider impact information symbols' polarity on performance. Besides, despreading operation is carried out at a low signal-to-noise ratio (SNR), and hence it requires number hardware resources for to achieve high-precision synchronization. view this, paper proposes algorithm based correction. Firstly, mathematical model transceivers established. Next,...

10.1109/icfeict59519.2023.00020 article EN 2023-05-01

In single-input single-output (SISO) systems, transmitting the expected signals with artificially generated noise can effectively enhance physical layer security (PLS). However, traditional suppression at intended receivers will increase algorithm complexity, particularly over multi-path fading channels, which poses challenges for some massive Internet-of-Things (IoT) networks that take advantage of low-cost and resource-constrained nodes. this paper, we design a novel self-noise (SN)...

10.1109/vtc2023-fall60731.2023.10333402 article EN 2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall) 2023-10-10

Full-duplex wireless communication can double the spectral efficiency by transmitting and receiving information simultaneously, but it suffers from strong self-interference (SI). Baseband SI cancellation (SIC) estimate subtract signal, while perfect SIC is unachievable for existence of intended signal. To enhance capability, we propose a two-stage recursive least squares (RLS) filter architecture with low computation complexity environmental robustness. In first stage, acts as traditional...

10.1109/globecom54140.2023.10437734 article EN GLOBECOM 2022 - 2022 IEEE Global Communications Conference 2023-12-04

The early procedures and algorithms for national digital orthophoto generation in the National Digital Orthophoto Program (NDOP) were based on earlier USGS mapping operations, such as field control, aerotriangulation (derived 1920s), quarter-quadrangle-centered (3.75 minutes of longitude latitude geographic extent), 1:40,000 aerial photographs, 2.5 D elevation models. However, large-scale city orthophotos using have disclosed many shortcomings, e.g., ghost image, occlusion, shadow. Thus, to...

10.1109/igarss.2003.1295255 article EN 2004-08-13

Artificial noise (AN) is an effective physical security measure against eavesdropping in wireless communication. In previous literatures, AN generally analyzed multiple transmit antenna systems and suppressed by zero-forcing algorithm, which implemented using the spatial degrees of freedom. this paper, suppression model under single-input multi-output (SIMO) presented, impact imperfect frequency synchronization on performance analyzed. Specifically, we first analyze single branch with...

10.1109/globecom48099.2022.10001464 article EN GLOBECOM 2022 - 2022 IEEE Global Communications Conference 2022-12-04
Coming Soon ...