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Device-free passive localization aims at locating moving objects that do not carry any localization devices. The rationale of this problem is based on the fact that a moving object can result in changes of received signal strength (RSS) of the wireless links. Existing studies only consider localization of a single-target localization or a multi-target group moving together, equivalent to a single-target...
Monolithic CMOS photonics seeks to minimize total transceiver cost by simplifying packaging, design and test. Here we examine 25 Gb/s applications in the context of integrated transistor performance and demonstrate a 4λ×25 Gb/s reference design.
We report on the use of 4-Dimension coded modulation for short-reach interfaces. With low extra complexity, 4D-coded PAM4 enables a performance improvement when associated with low-latency and low-complexity FEC, as demonstrated by experimental results.
To understand the utilization of clinical resources and improve the efficiency of healthcare, it is often necessary to accurately locate patients and doctors in a healthcare facility. However, existing tracking methods, such as GPS, Wi-Fi and RFID, have technological drawbacks or impose significant costs, thus limiting their applications in many clinical environments, especially those with indoor...
This paper proposes a design of wireless communication system, particularly physical layer system (PHY) for Factory Automation (FA) system based on Wireless Local Area Network (WLAN) communication system. The designed PHY system is developed based on a fast and deterministic communication featuring a synchronous multi user round robin transmission protocol. Low overhead Packet Division Multiple Access...
A 400-MHz 10-Mbps differential BPSK (D-BPSK) transceiver is presented. The receiver adopts a dynamic phase-to-amplitude conversion technique, which converts signal phase transition to amplitude variation. In the transmitter, phase modulated signal is realized by edge combining appropriate phases via an array of phase MUXs. Fabricated in 0.18-μm CMOS process, the receiver accomplishes −63dBm sensitivity...
This paper presents sub-THz interconnect for high energy-efficiency chip-to-chip communications, including a microstrip line based low-loss wideband sub-THz channel and a high energy-efficiency transceiver. The channel loss is as low as 0.06 dB/mm. The transmitter output power is 0.66 dBm with 8.8 mW of DC power consumption, and the receiver consumes 60.8 mW DC power. The interconnect achieves 9-Gb/s...
This paper presents a 6–8GHz 2Mb/s Chirp-UWB (C-UWB) transceiver implemented in 65nm CMOS. The transceiver performs burst-mode transmission with an optimum duty-cycle control by utilizing a steep digital gradient generation circuit in the transmitter. To enhance sensitivity and interference immunity, a slope detection based decision method is employed in the receiver by utilizing a 2-bit continuous-time...
This paper presents a fully-integrated Ka-band 4RX/4TX phased-array transceiver IC. The four transceiver channels are synchronized by an I/Q standing wave oscillator (SWO). Their signal phases are shifted by hybrid analog IF and LO phase interpolators, and can be controlled digitally and independently. The SWO further composes an on-chip PLL, and is locked to a 1.09 GHz off-chip global reference to...
Faster-than-Nyquist (FTN) system provides higher throughput and spectrum efficiency, which is pivotal in future communication. Traditionally in Nyquist system, orthogonality of shaping waveforms is required in order to avoid inter-symbol interference (ISI). However, ISI is permitted in FTN system and thus the advantages of nonorthogonal pulses can be utilized. In this paper, two innovative ones, namely...
Phased array radar systems typically utilize calibration network coupling to the transceiver for channel amplitude and phase calibration. The calibration network is stable and reliable, and the influence of the external factors is small, and the accuracy of the amplitude and the phase can be guaranteed. The design implements a generic digital transceiver calibration module, mainly composed of the...
Modern frequency division duplex radio frequency transceivers experience transmitter-to-receiver leakage due to the limited isolation of the duplexer. In Long Term Evolution-Advanced (LTE-A) carrier aggregation receivers the coupling between the local oscillators creates harmonics on the chip which can lead to the downconversion of this leakage signal to the receive (Rx) baseband. Thereby, this so-called...
In ultra-high-speed (>400Gb/s per wavelength), high-spectral efficiency coherent optical communication systems using multi-carrier spectral superchannels, the maximum reach is severely limited due to linear and, foremost, nonlinear impairments. Hence, the implementation of advanced digital signal processing (DSP) techniques in optical transceivers is crucial for alleviating the impact of such impairments...
In this paper, both the I/Q imbalance compensation and the channel equalization approach are presented for space-time-block-code (STBC) MIMO-OFDM systems. The I/Q imbalance compensation scheme is composed of self-calibration and tracking processes. The self-calibration process is further divided into two stages, symmetric- and anti-symmetric-tone, employed to extract the amplitude- and the phase-mismatch...
Advantages offered by coherent detection systems in access networks are not limited to the increase of power budget due to the superior sensitivity. Channel selectivity is another intriguing feature offered by coherent systems that can be exploited to enable advanced system and network functionalities for access systems. Among them, we focus here on the implementation of filterless optical networks...
The design of optimal covert underwater acoustic communication systems is required from an analysis of the impact on communication performance by applying the low probability of interception (LPI) techniques for reducing the probability of intercept information transmitted. In this paper, we propose a transceiver model using a spread spectrum based on turbo equalization in order to improve performance...
This paper aims at a realistic evaluation of Rayleigh-product multiple-input multiple-output (MIMO) systems. Specifically, by considering the residual transceiver hardware impairments into account, we derive the ergodic channel capacity of a MIMO system with optimal receivers in the case of insufficient scattering. Actually, motivated by the increasing interest for massive MIMO systems, we investigate...
The design of a Q-band superheterodyne transceiver for millimeter wave (mm Wave) communication is presented in this paper. The center frequency is 44.82 GHz with the channel bandwidth of 500 MHz. The overall system is divided into mm Wave frontend, the immediate frequency (IF) module and the local oscillator (LO) for IF. These three parts are implemented and tested respectively to ensure the performance...
In this paper, an active mixing UHF-Band 8 channels digital array module is introduced. Eight independent RF and digital transceiving channels are integrated. three-dimensional layout, standardization and modularization design are adopted. The power supply is only 28 V, signal control and data transmission go through optical fiber. Good measured results are obtained.
In this paper a specific implementation of the transceiver controller is presented, based on a high speed serial interface (HSSI) protocol-JESD204B. The implementation of this protocol provides less pin counts, lower complexity and more accurate timing control than the traditional parallel data transportation from ADC to DAC. This paper gives a design of the transceiver controller and the verification...
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