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An offset quadrature amplitude modulation (OQAM)-filterbank based multicarrier (FBMC) has been attracted and nominated as one of new waveforms for 5G communications due to its capability of frequency selectivity, robustness to carrier frequency offset (CFO) and omission of cyclic prefix (CP). Regardless of these advantages, many researchers have claimed pros and cons for the usage of FBMC, among those...
For mainland-island communication applications, radio-over-fiber (RoF) links which have been commonly designated for short-reach access networks need to be re-designed due to the long geogrgphical distance nature. In this paper, we present a calculating model of long-distance RoF communication systems that connect mainland and islands using intensity modulation (IM) technique, two erbium-doped fiber...
In this paper, a secure acoustic communication system using a loudspeaker, vibration motor and microphone is proposed. The transmitter (smartphone) transmits an encrypted message and the encryption key from the loudspeaker and the vibration motor, respectively. While the sound emitted from the loudspeaker propagates long distances, the vibration emitted from the vibration motor propagates short distances...
In this paper we propose a scheme that unconditional secure transmission is used to implement information reconciliation in key generation. Unconditional secure transmission achieved by associating MIMO beamforming with security code can be safe and reliable. Theoretically, the reconciliation and privacy amplification phase can take advantage of the unconditional communication security to reconciling...
This paper describes and verifies a method of implementing bit error rate (BER) calculation for FPGA-based physical layer security techniques for Software Defined Radio (SDR). Specifically, we describe an independent source signal processing architecture for an efficient calculation of BER for wireless communication modules across the transmitter and receiver nodes. The source components at the transmitter...
The High Performance Waveform (HPW) was developed before parallel concatenated codes (PCCC) and serial concatenated codes (SCCC) were in wide use and so it makes sense to take advantage of the advancements in communication theory and processor computation speed that have taken place since its inception. In its current form, HPW transmits a Raised-Cosine Continuous Phase Modulation (1RC CPM) modulation...
The Internet of Things (IoT), describing the Machine Type Communications (MTC), is in the center of many new technical studies and industrial projects. It is also a central topic for the future 5G technologies standardization. Pending the new generation of cellular networks, the 3rd Generation Partnership Project (3GPP) has already standardized in May 2016, an evolution of the 2G and 4G networks to...
The filter bank multicarrier with offset quadrature amplitude modulation (FBMC/OQAM) is considered as a most efficient technique for next wireless communication systems 5G due to its higher spectral bandwidth efficiency, robustness to frequency-selective fading channels, etc. However, the biggest disadvantage to working with FBMC system is its high peak-to-average power ratio (PAPR) leads to severe...
IEEE 802.11b WLAN is widely used to implement Wi-Fi based Time Difference of Arrival (TDoA) indoor localization. This paper presents a novel IEEE 802.11b baseband receiver and the corresponding localization system. Frame detector and phase recovery block are dedicated to frame reception and frequency offset compensation. Baker code re-correlator is specially designed to improve anti-noise performance...
Molecular communications (MC) is a promising paradigm which utilizes molecules to implement communication among nano-machines. Cooperative relaying strategies can be used to extend communication distance and achieve reliable remote communications. In this paper, a two-hop diffusion-based molecular communication with three nano-machine nodes is considered. To mitigate the drawback of traditional cooperative...
Radio-on-demand wireless sensor networks (WSN) are expected to be expanded the lifetime of sensor nodes because the receiver effectively utilizes the sleep/wake-up control function. The multi-carrier code division multiple access (MC-CDMA) using modified pseudo orthogonal M-sequence sets (MPOMS) codes have been proposed for radio-on-demand WSN systems. In this paper, the rigorous communication success...
In this paper, the influence of disturbance light on visible light communication was investigated. A transmitter and a receiver of 4 pulse position modulation (4PPM) and π/4 differentially coherent quadrature phase-shift keying (π/4 DCQPSK) were fabricated and the bit error rates of the two modulation schemes were compared. This time, an incandescent bulb with a power consumption of 100 W was used...
Millimeter wave (mmWave) communication is a resplendent technology for the Fifth Generation (5G) systems. This outdoor cellular system, 5G, is expected to provide internet connections 40 times faster and with at least four times more coverage worldwide than the current 4G Long Term Evolution (LTE) wireless communications standard. However, mmWave communication system performance could be degraded...
Indoor visible light communications utilizing LED light that are available for not only the illumination but also data transmission are received interest for future home networks. The dimming control function which the illumination brightness can be controlled should not be compromised by the data transmission function. The bit error rate performance of the indoor visible light communications deteriorates...
Visible light communication (VLC) has become an option for data communication due to its unregulated bandwidth, being cost effective and not posing any health threats to people and the environment. Several studies on the performance of VLC systems have been conducted, where the systems were used for both solid-state illumination and data transmission. In this paper, an application using a single LED...
The paper outlines methods that employ the properties of popular FSK (Frequency-shift Keying) modulation for covert transmission of data between two radio transceivers. With the use of dedicated modulation, the risk of interception of confidential information on military radio channels is considerably reduced. The paper also discusses the methods of radio signal modulation in practical applications,...
The challenges faced in the design of multiuser multiple-input multiple-output orthogonal frequency division multiplexing (MU-MIMO-OFDM) systems are the high peak-to-average power ratio (PAPR) in the transmitted signal and interference occured among the different users. Shaping the subcarriers in a proper way can reduce the PAPR of the OFDM signal effectively and minimize the interference among users...
We demonstrate multiplexing and demultiplexing for terahertz wireless data links in the 300 GHz band. Demultiplexing of real-time data streams at different carrier frequencies with different data rates is presented, and real-time bit error rates are characterized.
Hybrid copper/fiber networks bridge the gap between the fiber link at the distribution point and the customer by using copper wires over the last meters. The G.fast technology has been designed to be used in such a fiber to the distribution point (FTTdp) network. Crosstalk management using MIMO precoding is a key to the required performance of FTTdp. With higher frequencies used on copper wires, nonlinear...
We compared the performance of the asymmetric and direct current bias limiting optical orthogonal frequency division multiplexing (ADO-OFDM), asymmetric limiting optical orthogonal frequency division multiplexing (ACO-OFDM), and the direct current bias limiting optical orthogonal frequency division multiplexing (DCO-OFDM) in visible light communication (VLC) systems. We optimize the power ratio between...
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