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75 Results Found

  • Article
  • Open Access
3 Citations
4,535 Views
20 Pages

14 January 2020

This work presents the results of research toward designing an instruction set extension dedicated to Global Navigation Satellite System (GNSS) baseband processing. The paper describes the state-of-the-art techniques of GNSS receiver implementation....

  • Article
  • Open Access
4 Citations
6,237 Views
13 Pages

High-Throughput and Low-Latency Digital Baseband Architecture for Energy-Efficient Wireless VR Systems

  • Seokha Hwang,
  • Seungsik Moon,
  • Dongyun Kam,
  • Inn-Yeal Oh and
  • Youngjoo Lee

This paper presents a novel baseband architecture that supports high-speed wireless VR solutions using 60 GHz RF circuits. Based on the experimental observations by our previous 60 GHz transceiver circuits, the efficient baseband architecture is prop...

  • Feature Paper
  • Article
  • Open Access
10 Citations
7,065 Views
19 Pages

The next evolution in cellular communications will not only improve upon the performance of previous generations, but also represent an unparalleled expansion in the number of services and use cases. One of the foundations for this evolution is the d...

  • Article
  • Open Access
1 Citations
2,133 Views
22 Pages

20 May 2025

This paper presents hardware-efficient phase demodulation schemes for FPGA-based digital phase-sensitive optical time-domain reflectometry (ϕ-OTDR) receivers. We first derive a signal model for the heterodyne ϕ-OTDR frontend, then propose a...

  • Article
  • Open Access
2 Citations
3,687 Views
12 Pages

The baseband signal of the 406 MHz COSPAS-SARSAT emergency beacon is a 144-bit or 112-bit data with 0 and 1 code, including the information bits and error correcting check bits. In order to improve the coding efficiency of the baseband signal for the...

  • Article
  • Open Access
1 Citations
1,747 Views
20 Pages

14 May 2024

Hypercomplex numbers, which are multi-dimensional extensions of complex numbers, have been proven beneficial in the development of advanced signal processing algorithms, including multi-dimensional filter design, linear regression and classification....

  • Communication
  • Open Access
11 Citations
2,819 Views
10 Pages

A 245 GHz Real-Time Wideband Wireless Communication Link with 30 Gbps Data Rate

  • Ting Zhang,
  • Hao Zhang,
  • Xiaojing Huang,
  • Hajime Suzuki,
  • Joseph Pathikulangara,
  • Ken Smart,
  • Jia Du and
  • Jay Guo

22 September 2022

This paper presents a 245 GHz wireless communications system with a data rate of 30 Giga bits per second (Gbps) at a 1.2 m distance, which proves the potential for future high-speed communications beyond 5G technology. The system consists of low-comp...

  • Article
  • Open Access
1 Citations
1,963 Views
20 Pages

In this work, we present a novel four-channel coherent optical chaotic secure communication (COCSC) system, incorporating four simultaneous photonic reservoir computers in tandem with four coherent demodulation units. We employ a quartet of photonic...

  • Article
  • Open Access
3 Citations
2,240 Views
34 Pages

Hybrid Wideband Beamforming for Sum Spectral Efficiency Maximization in Millimeter-Wave Relay-Assisted Multiuser MIMO Cognitive Radio Networks

  • Zunira Abbasi,
  • Hafiz Muhammad Tahir Mustafa,
  • Jung-In Baik,
  • Muhammad Adnan,
  • Waqar Majeed Awan and
  • Hyoung-Kyu Song

12 December 2023

Relay-assisted hybrid beamforming plays an inevitable role in enhancing network coverage, transmission range, and spectral efficiency while simultaneously reducing hardware cost, power consumption, and hardware implementation complexity. This study i...

  • Article
  • Open Access
4 Citations
3,271 Views
15 Pages

A Fully Integrated RFID Reader SoC

  • Jian-Guo Hu,
  • Wen-Zhuo Mei,
  • Jin Wu,
  • Jia-Wei Li and
  • De-Ming Wang

29 August 2023

The traditional RFID reader module relies on a discrete original design. This design integrates a microcontroller, high-frequency RFID reader IC and other multiple chips onto a PCB board, leading to bottlenecks in cost, power consumption, stability a...

  • Feature Paper
  • Article
  • Open Access
20 Citations
9,195 Views
24 Pages

A Software-Defined Radio for Future Wireless Communication Systems at 60 GHz

  • Luis Duarte,
  • Rodolfo Gomes,
  • Carlos Ribeiro and
  • Rafael F. S. Caldeirinha

6 December 2019

This paper reports on a complete end-to-end 5G mmWave testbed fully reconfigurable based on a FPGA architecture. The proposed system is composed of a baseband/low-IF processing unit, and a mmWave RF front-end at both TX/RX ends. In particular, the ba...

  • Article
  • Open Access
1 Citations
3,251 Views
13 Pages

28 April 2022

This paper presents a 60 GHz CMOS I/Q receiver for the high-speed wireless communication system. It consists of a low noise amplifier, single-to-differential (S2D) amplifier, passive mixer, buffer amplifier with passive I/Q generator, and wideband ba...

  • Article
  • Open Access
3 Citations
3,725 Views
26 Pages

WISCANet: A Rapid Development Platform for Beyond 5G and 6G Radio System Prototyping

  • Jacob Holtom,
  • Andrew Herschfelt,
  • Isabella Lenz,
  • Owen Ma,
  • Hanguang Yu and
  • Daniel W. Bliss

9 October 2022

Validating RF applications is traditionally time consuming, even for relatively simple systems. We developed the WISCA Software-Defined Radio Network (WISCANet) to accelerate the implementation and validation of radio applications over-the-air (OTA)....

  • Article
  • Open Access
4 Citations
1,816 Views
11 Pages

For the existing outphasing architectures of an all-digital transmitter (ADTx), the required sampling rate of the signal is too high, which increases the difficulty of digital radio frequency pulse width modulation (RF-PWM) processing. In this paper,...

  • Article
  • Open Access
4 Citations
3,379 Views
19 Pages

A highly reconfigurable open-loop analog baseband circuitry with programmable gain, bandwidth and filter order are proposed for integrated linear frequency modulated continuous wave (LFMCW) radar receivers in this paper. This analog baseband chain al...

  • Article
  • Open Access
17 Citations
8,324 Views
14 Pages

Software-Defined Radio Beamforming System for 5G/Radar Applications

  • Diogo Marinho,
  • Raul Arruela,
  • Tiago Varum and
  • João N. Matos

15 October 2020

Based on the flexibility of software-defined radio (SDR) techniques applied to an array of antennas, this article presents a beamforming architecture designed to operate in millimeter-wave bands (28 GHz), with possible applications in radar and 5G sy...

  • Article
  • Open Access
10 Citations
3,334 Views
18 Pages

Correlation Technologies for Emerging Wireless Applications

  • Sidina Wane,
  • Fabien Ferrero,
  • Thanh Vinh Dinh,
  • Damienne Bajon,
  • Lionel Duvillaret,
  • Gwenaël Gaborit and
  • Vincent Huard

In this article, we introduce correlation technologies both at RF/mmWave and baseband frequencies. At RF and mmWave frequencies, power-spectra and energy-spectra metrics are introduced for measuring the power-density of mobile devices and systems. Ne...

  • Feature Paper
  • Article
  • Open Access
5 Citations
5,121 Views
14 Pages

A millimeter-wave direct-conversion radio-frequency (RF) transmitter requires precise in-/quadrature-phase (I/Q) mismatch calibration and dc offset cancellation to minimize image rejection ratio (IRR) and LO feedthrough (LOFT) for ensuring satisfacto...

  • Article
  • Open Access
9 Citations
6,184 Views
11 Pages

Low-Power CMOS Complex Bandpass Filter with Passband Flatness Tunability

  • Jungah Kim,
  • Yongho Lee,
  • Shinil Chang and
  • Hyunchol Shin

We present a low-power CMOS active-resistance-capacitance (active-RC) complex bandpass filter (BPF) with tunable gain, bandwidth, center frequency, quality factor, and passband flatness for Bluetooth applications. A transfer function analysis for a c...

  • Article
  • Open Access
2 Citations
2,881 Views
23 Pages

23 February 2024

Real-time heterogeneous parallel embedded digital signal processor (DSP) systems process multiple data streams in parallel in a stringent time interval. This type of system on chip (SoC) requires the network on chip (NoC) to establish multiple symbio...

  • Article
  • Open Access
17 Citations
5,891 Views
19 Pages

Tradeoff between User Quality-Of-Experience and Service Provider Profit in 5G Cloud Radio Access Network

  • Mahbuba Afrin,
  • Md. Abdur Razzaque,
  • Iffat Anjum,
  • Mohammad Mehedi Hassan and
  • Atif Alamri

18 November 2017

In recent years, the Cloud Radio Access Network (CRAN) has become a promising solution for increasing network capacity in terms of high data rates and low latencies for fifth-generation (5G) cellular networks. In CRAN, the traditional base stations (...

  • Article
  • Open Access
1 Citations
4,928 Views
6 Pages

Calculation of Receiver Sensitivities in (Orthogonal) Subcarrier Multiplexing Microwave-Optical Links

  • Fernando A. Gutiérrez,
  • Eamonn P. Martin,
  • Philip Perry,
  • Andrew D. Ellis and
  • Liam P. Barry

15 February 2017

Microwave-based all-analogue (orthogonal) subcarrier multiplexing (SCM) permits a direct processing of baseband data at Gbit/s while achieving low power consumption, low latency, low cost, and tolerance to dispersion. A key figure of merit in any SCM...

  • Review
  • Open Access
14 Citations
5,287 Views
23 Pages

5 December 2022

Long-range E-band communication with fiber-equivalent speed is emerging extensively as a critical technology in the next-generation communication. This paper firstly reviews the relevant progress in recent research. A brief survey is presented on hig...

  • Review
  • Open Access
1 Citations
4,018 Views
31 Pages

Cutting-Edge Microwave Sensors for Vital Signs Detection and Precise Human Lung Water Level Measurement

  • Anwer S. Abd El-Hameed,
  • Dalia M. Elsheakh,
  • Gomaa M. Elashry and
  • Esmat A. Abdallah

6 August 2024

In this article, a comprehensive review is presented of recent technological advancements utilizing electromagnetic sensors in the microwave range for detecting human vital signs and lung water levels. With the main objective of improving detection a...

  • Article
  • Open Access
5 Citations
3,302 Views
11 Pages

Design of a Digital Baseband Processor for UHF Tags

  • Na Bai,
  • Liang Wang,
  • Yaohua Xu and
  • Yi Wang

26 August 2021

In this paper, we present a new digital baseband processor for UHF tags. It is a low-power and low-voltage digital circuit and adopts the Chinese military standard protocol GJB7377.1. The processor receives data or commands from the RF front-end and...

  • Article
  • Open Access
2 Citations
3,601 Views
15 Pages

Modeling and Fabrication of a Reconfigurable RF Output Stage for Nanosatellite Communication Subsystems

  • Jose L. Alvarez-Flores,
  • Jorge Flores-Troncoso,
  • Leonel Soriano-Equigua,
  • Jorge Simón,
  • Joel A. Castillo,
  • Ramón Parra-Michel and
  • Viktor I. Rodriguez-Abdala

Current small satellite platforms such as CubeSats require robust and versatile communication subsystems that allow the reconfiguration of the critical operating parameters such as carrier frequency, transmission power, bandwidth, or filter roll-off...

  • Letter
  • Open Access
31 Citations
7,968 Views
12 Pages

An SNR Estimation Technique Based on Deep Learning

  • Kai Yang,
  • Zhitao Huang,
  • Xiang Wang and
  • Fenghua Wang

Signal-to-noise ratio (SNR) is a priori information necessary for many signal processing algorithms or techniques. However, there are many problems exsisting in conventional SNR estimation techniques, such as limited application range of modulation t...

  • Article
  • Open Access
1,924 Views
18 Pages

Multiservice Loss Models in C-RAN Supporting Compound Poisson Traffic

  • Iskanter-Alexandros Chousainov,
  • Ioannis Moscholios,
  • Panagiotis Sarigiannidis and
  • Michael Logothetis

In this paper, a cloud radio access network (C-RAN) is considered where the baseband units form a pool of computational resource units (RUs) and are separated from the remote radio heads (RRHs). The RRHs are grouped into clusters based on their capac...

  • Feature Paper
  • Article
  • Open Access
5 Citations
2,248 Views
18 Pages

Congestion Probabilities in a Multi-Cluster C-RAN Servicing a Mixture of Traffic Sources

  • Iskanter-Alexandros Chousainov,
  • Ioannis D. Moscholios and
  • Panagiotis G. Sarigiannidis

11 December 2020

A multi-cluster cloud radio access network (C-RAN) is considered in this paper where the remote radio heads (RRHs) form different clusters. A cluster includes RRHs that have the same radio resource unit capacity. In addition, all RRHs are separated f...

  • Article
  • Open Access
8 Citations
5,133 Views
19 Pages

29 May 2017

This paper presents an efficient and precise imaging algorithm for the large bandwidth sliding spotlight synthetic aperture radar (SAR). The existing sub-aperture processing method based on the baseband azimuth scaling (BAS) algorithm cannot cope wit...

  • Letter
  • Open Access
2 Citations
2,266 Views
21 Pages

Microwave Staring Correlated Imaging Method Based on Steady Radiation Fields Sequence

  • Jianlin Zhang,
  • Bo Yuan,
  • Zheng Jiang,
  • Yuanyue Guo and
  • Dongjin Wang

30 November 2020

Microwave Staring Correlated Imaging (MSCI) is a newly proposed computational high-resolution imaging technique. The imaging performance of MSCI with the existence of modeling errors depends on the properties of the imaging matrix and the relative pe...

  • Article
  • Open Access
1 Citations
3,547 Views
14 Pages

Usually many applications of radar transceivers and heterodyne frequency synthesizers assume a spurious signal power level below −60 dBc. In the case of modern synthesizers using direct digital synthesis (DDS) systems, the number of emerging sp...

  • Article
  • Open Access
2 Citations
3,087 Views
19 Pages

A Machine Learning Approach for the Tune Estimation in the LHC

  • Leander Grech,
  • Gianluca Valentino and
  • Diogo Alves

29 April 2021

The betatron tune in the Large Hadron Collider (LHC) is measured using a Base-Band Tune (BBQ) system. The processing of these BBQ signals is often perturbed by 50 Hz noise harmonics present in the beam. This causes the tune measurement algorithm, cur...

  • Article
  • Open Access
19 Citations
2,922 Views
20 Pages

14 August 2022

A chirp-mismatch echo signal can be generated by exchanging the I and Q baseband signals of a received SAR signal. In this paper, the basic generation principles of a chirp-mismatch echo signal are analyzed. Then, a suppression jamming method with co...

  • Article
  • Open Access
3 Citations
2,039 Views
15 Pages

26 June 2024

As one of the most widely used spread spectrum techniques, the frequency-hopping spread spectrum (FHSS) has been widely adopted in both civilian and military secure communications. In this technique, the carrier frequency of the signal hops pseudo-ra...

  • Article
  • Open Access
5 Citations
4,271 Views
41 Pages

22 February 2024

This paper presents the design, proof-of-concept implementation, and preliminary performance assessment of an affordable real-time High-Sensitivity (HS) Global Navigation Satellite System (GNSS) receiver. Specifically tailored to capture and track we...

  • Article
  • Open Access
8 Citations
5,756 Views
18 Pages

6 December 2017

This paper introduces the principle and key technology of single radio frequency (RF) link Multiple-Input Multiple-Output (MIMO) system based on a switched parasitic antenna (SPA). The software SystemVue is adopted for signal processing and system-le...

  • Article
  • Open Access
1 Citations
2,571 Views
13 Pages

Reader–Tag Commands via Modulation Cutoff Intervals in RFID Systems

  • Abdallah Y. Alma’aitah and
  • Mohammad A. Massad

16 September 2021

Radio frequency identification (RFID) technology facilitates a myriad of applications. In such applications, an efficient reader–tag interrogation process is crucial. Nevertheless, throughout reader–tag communication, significant amounts of time and...

  • Article
  • Open Access
10 Citations
10,272 Views
28 Pages

Designing Domain-Specific Heterogeneous Architectures from Dataflow Programs

  • Süleyman Savas,
  • Zain Ul-Abdin and
  • Tomas Nordström

The last ten years have seen performance and power requirements pushing computer architectures using only a single core towards so-called manycore systems with hundreds of cores on a single chip. To further increase performance and energy efficiency,...

  • Article
  • Open Access
3 Citations
2,029 Views
12 Pages

Identification of Terahertz Link Modulation in Atmospheric Weather Conditions

  • Zhendong Wu,
  • Yige Qiao,
  • Jianjun Ma,
  • Yuping Zhang,
  • Dehua Li and
  • Huiyun Zhang

3 July 2023

With the rapid increase of wireless connectivity, current spectrum resources are not enough for significant requirements for large data capacity. Research interests are moving towards the high-frequency band in the terahertz range for wider bandwidth...

  • Review
  • Open Access
6 Citations
6,575 Views
44 Pages

24 September 2020

Recent advances in millimeter wave technologies, both in component and system design, in line with important size and cost reductions, have opened up new applications in ultra-high-speed wireless communications, radar and imaging sensors. The paper p...

  • Article
  • Open Access
10 Citations
3,209 Views
17 Pages

Retrieving Doppler Frequency via Local Correlation Method of Segmented Modeling

  • Lue Chen,
  • Jinsong Ping,
  • Jianfeng Cao,
  • Xiang Liu,
  • Na Wang,
  • Zhen Wang,
  • Ping Zhu,
  • Mei Wang,
  • Haijun Man and
  • Songtao Han
  • + 3 authors

20 July 2021

The high accuracy radio Doppler frequency is critical for navigating a deep space probe and for planetary radio science experiments. In this paper, we propose a novel method based on the local correlation of segmented modeling to retrieve Doppler fre...

  • Proceeding Paper
  • Open Access
2 Citations
1,734 Views
10 Pages

Quad-Band Multi-Constellation Global Navigation Satellite System Receiver Development Platform with System-on-Chip Architecture

  • Muhammad Saad,
  • Fabio Garzia,
  • Szu-Jung Wu,
  • Iñigo Cortés,
  • Frank Förster,
  • Matthias Overbeck,
  • Santiago Urquijo and
  • Wolfgang Felber

29 October 2023

GNSS receivers with multi-system and multi-frequency capabilities allow more reliable positioning, especially in challenging environments. However, increased available systems and signals lead to hardware resource allocation problems. This issue esca...

  • Article
  • Open Access
2 Citations
4,945 Views
17 Pages

Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver

  • Zicheng Wu,
  • Sida Li,
  • Zhiping Huang,
  • Fangqi Shen and
  • Yongjie Zhao

27 October 2021

Chromatic dispersion equalization (CDE) in coherent optical communication systems is extremely critical for subsequent digital signal processing (such as frequency offset estimation and carrier phase recovery). Various methods mentioned in the publis...

  • Article
  • Open Access
4 Citations
1,652 Views
46 Pages

7 June 2024

This paper proposes a cognitive radio network (CRN)-based hybrid wideband precoding for maximizing spectral efficiency in millimeter-wave relay-assisted multi-user (MU) multiple-input multiple-output (MIMO) systems. The underlying problem is NP-hard...

  • Article
  • Open Access
2,377 Views
21 Pages

Efficient Sigma–Delta Sensor Array Beamforming

  • Sammy Johnatan Carbajal Ipenza and
  • Bruno Sanches Masiero

31 August 2023

Nowadays, sensors with built-in sigma–delta modulators (ΣΔMs) are widely used in consumer, industrial, automotive, and medical applications, as they have become a cost-effective and convenient way to deliver data to digital processo...

  • Article
  • Open Access
541 Views
24 Pages

4 December 2025

Ultra-high sampling rates in coherent optical front-ends increasingly exceed the processing capabilities of real-time baseband processors, creating a bottleneck in coherent free-space optical communication systems. We propose a unified state-space fr...

  • Article
  • Open Access
2 Citations
6,037 Views
26 Pages

An X-Band CMOS Digital Phased Array Radar from Hardware to Software

  • Yue-Ming Wu,
  • Hao-Chung Chou,
  • Cheng-Yung Ke,
  • Chien-Cheng Wang,
  • Chien-Te Li,
  • Li-Han Chang,
  • Borching Su,
  • Ta-Shun Chu and
  • Yu-Jiu Wang

6 November 2021

Phased array technology features rapid and directional scanning and has become a promising approach for remote sensing and wireless communication. In addition, element-level digitization has increased the feasibility of complicated signal processing...

  • Article
  • Open Access
27 Citations
7,058 Views
13 Pages

Automatic Modulation Recognition Based on Deep-Learning Features Fusion of Signal and Constellation Diagram

  • Hui Han,
  • Zhijian Yi,
  • Zhigang Zhu,
  • Lin Li,
  • Shuaige Gong,
  • Bin Li and
  • Mingjie Wang

In signal communication based on a non-cooperative communication system, the receiver is an unlicensed third-party communication terminal, and the modulation parameters of the transmitter signal cannot be predicted in advance. After the RF signal pas...

  • Article
  • Open Access
5 Citations
3,812 Views
21 Pages

22 March 2019

The fog radio access network (F-RAN) equipped with enhanced remote radio heads (eRRHs), which can pre-store some requested files in the edge cache and support mobile edge computing (MEC). To guarantee the quality-of-service (QoS) and energy efficienc...

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