Doubling the Accuracy of Indoor Positioning: Frequency Diversity [PDF]
Sensors, 2020 Determination of indoor position based on fine time measurement (FTM) of the round trip time (RTT) of a signal between an initiator (smartphone) and a responder (Wi-Fi access point) enables a number of applications.
Berthold K.P. Horn
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A Frequency-Diversity System With Diversity Encoder and OFDM Modulation [PDF]
IEEE Access, 2021 In this work, a diversity encoder maps vectors of N modulated symbols to vectors of N diversity symbols using an orthogonal matrix. Each modulated symbol appears in N diversity symbols.
Ashraf Y. Hassan
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Direction of Arrival Estimation Using Two Hydrophones: Frequency Diversity Technique for Passive Sonar [PDF]
Sensors, 2019 The traditional passive azimuth estimation algorithm using two hydrophones, such as cross-correlation time-delay estimation and cross-spectral phase estimation, requires a high signal-to-noise ratio (SNR) to ensure the clarity of the estimated target ...
Peng Li, Xinhua Zhang, Wenlong Zhang
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Design of Six Port Antenna With Frequency Diversity and Diverse Radiation Pattern
IEEE Access, 2022 Based on shared U-shaped patch, a six port antenna with frequency and radiation pattern diversity is investigated in this paper. Two evolutionary U-shaped patches are cascaded together to form a three port antenna with a common ground.
Jinzhi Zhou, Ming Yang
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Spatial diversity improvement in frequency-diverse computational imaging with a multi-port antenna
Results in Physics, 2021 In this paper, we study an additional spatial diversity mechanism added to a cavity-backed frequency-diverse aperture for computational imaging applications at X-band frequencies.
The Viet Hoang +6 more
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Joint use of frequency-time division and antinoise coding in radio communication systems with FHSS
Российский технологический журнал, 2021 In the context of continuous improvement of radio prospecting and active radio jamming technics along with introduction of automated active countermeasures systems (ACS), the frequency-hopping spread spectrum (FHSS) radio communication systems (RCS) are ...
A. A. Paramonov, Van Zung Hoang
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Multi-Resolution STAP for Enhanced Ultra-Low-Altitude Target Detection
Remote Sensing, 2021 In this paper, an ultra-low-altitude target (ULAT) detection approach, referred to as the multi-resolution space-time adaptive processing (STAP), is proposed to enhance the target detection performance in a missile-borne radar system.
Haodong Li +5 more
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Advanced Science, 2022 Origami is the art of paper folding that allows a single flat piece of paper to assume different 3D shapes depending on the fold patterns and the sequence of folding.
Suresh Venkatesh +4 more
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Hybrid FSK–FDM Scheme for Data Rate Enhancement in Dual-Function Radar and Communication
Sensors, 2023 In this paper, we present a hybrid frequency shift keying and frequency division multiplexing (i.e., FSK–FDM) approach for information embedding in dual-function radar and communication (DFRC) design to achieve an improved communication data rate.
Muhammad Fahad Munir +8 more
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Mine tagless target location method based on combined space and frequency diversity
Gong-kuang zidonghua, 2020 Due to complicated underground environment, traditional active location technologies make it inconvenient for workers to carry tags or lose tags during operation, which are limited in application of underground target location, while existing passive ...
TENG Yue +5 more
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