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This article gives a description of the process followed at the Operations Support Facilities (OSF) of the Joint ALMA Observatory (JAO) to integrate the new receiver ALMA Band 5 in the array. Details about design, testing, screening criteria, performance and progress are given.
This paper presents a fully-integrated ultrawideband receiver MMIC for high data rate communication at 240 GHz operating with a LO frequency of 60 GHz. The chip was fabricated in a 35 nm InGaAs-based metamorphic high electron mobility transistor technology. It comprises a frequency doubler followed by a buffer amplifier in the LO path, a LNA in the RF path and a subharmonic single balanced downconverter...
This paper presents a new approach to approximate various complex arithmetic functions for applications in wideband RF transceivers by using stochastic computing based on the piecewise linear (PWL) approximation. The optimized design parameters for PWL approximation are chosen by an optimization algorithm targeting the best tradeoff between hardware complexity and approximation accuracy. Then, this...
In this article a millimetre-wave (mm-wave) down-converter based on a six-port correlator and zero bias Schottky diode is presented over 10 GHz bandwidth, from 72 to 82 GHz. The six-port is designed in such a way to have excellent phase resolution at four output ports witch leads to very accurate symbol position for QPSK demodulator. A prototype circuit has been manufactured with miniaturized hybrid...
Based on a workshop developed at INICTEL-UNI, this paper presents the methodology and considerations taken to improve the experiences in communication laboratory sessions in Peruvian universities with Software Defined Radio platforms, using a HackRF-One for transmission and a RTL-SDR for reception together with GNUradio Companion, an open source software. The use of these tools allows real communications...
The RTCA DO-260B document has stimulated since a few years ago the adoption of novel algorithms to improve the ability of receivers to detect and decode ADS-B signals, with particular emphasis on preamble detection, declaration of bit state and confidence level, detection and correction of errors. Motivated by an industry-driven project, this paper reports on performance analysis of a set of enhanced...
The design of massive MIMO, especially at millimeter waves, requires a trade-off between cost and power consumption, balancing the complexity and the performance in terms of achievable rate. A recent trend in the design is to split the pre-coding at the transmitter and the combining at the receiver into a digital and analog part, with hybrid analog-digital schemes. In this paper the effect of phase...
In this paper, we design and analyze the receiver channel of a glass interposer for a dual band Wi-Fi front end module (FEM). In RF systems, a RF sensitivity is the most important specification for a system performance and reliability. To guarantee a target RF sensitivity of the RF system, it is important to maintain a 50 Ohm impedance matching for RF channels. The 50 Ohm impedance matching of various...
This paper investigates the performance of an automotive RKE (Remote Keyless Entry) system under the influence of RF interference, injected by the Bulk Current Injection (BCI) test technique. Measurements indicate a severe degradation of performance in the 15 MHz–30 MHz frequency band where RF current injection level is set at 106 dBμA. Injection at these frequencies leads to failure in correct operation...
RF interference can be a significant problem in modern day electronic devices. We present a workflow for the simulation of RF interference using a combination of 3D full-wave simulation and a system-level approach. This methodology helps reveal the transmitter and receiver combinations that are potentially prone to interference. The utilization of time domain results generated from SPICE-type circuit...
This paper describes a method to increase the sensitivity of a digital radio receiver based on the time synchronous averaging (TSA). The data to be send are grouped into a block and the block is retransmitted multiple times. Received blocks are synchronously averaged thus increasing the signal-to-noise ratio. The TSA can be performed on the analog signal at the demodulator output (soft TSA) or on...
5G network is visualized to simplify the burden on current cellular infrastructure by offering significantly higher data rates through increased channel bandwidth. 5G communication system is expected toexploit spectrum band at millimeter wave (mmWave)frequencies. But the mobile communication at these mmWave spectrum band is far more complex than the current frequencies that are being used around the...
In this paper, we study the waveform design problem for a single-input single-output (SISO) radio-frequency (RF) wireless power transfer (WPT) system in frequency-selective channels. First, based on the actual non-linear current-voltage model of the diode at the energy receiver, we derive a semi-closed-form expression for the deliverable DC voltage in terms of the incident RF signal and hence obtain...
In preparation of potential future Earth observation Synthetic Aperture Radar (SAR) missions, the European Space Agency (ESA) is conducting instrument preparatory activities. This paper presents the status and results of the instrument pre-developments for an L-band receive-only SAR, which would fly in formation with an active SAR satellite acting as an illuminator. Such formations would enable e...
In this paper, a hybrid visible light communication (VLC)-radio frequency (RF) system including a legitimate receiver (R) and an eavesdropper (E) is considered. R can harvest energy from the light emitted by light emitting diodes (LEDs), which is used for the information transmission between R and the RF receiver which is close to the LED. It is assumed that E tries to eavesdrop the information delivered...
Noise coupling path on a fully LTE-compatible receiver circuit chain (Band1, 2110–2170 MHz for downlink) has been analyzed to estimate the victim wires that carry digital noise from RF digital to analogue circuits on the test RF IC chip, three noise-carrying wire groups were extracted out of numerous on-chip wires through systematic measurements and electromagnetic simulation. Then the patterned amorphous...
Photonic-electronic integration is a key technology to master data traffic growth and therefore an enabler of future network technologies. For some time now, a novel silicon-based photonic-electronic integration technology, photonic BiCMOS, is under development at IHP. Photonic BiCMOS is a planar technology co-integrating monolithically on a single substrate high-speed RF frontend electronics - by...
This paper presents a novel LIN transceiver designed and fabricated in a 0.14 µm high-voltage SOI CMOS technology that uses a time-continuous bus-feedback technique. The architecture of the LIN transceiver takes advantage of the advanced BCD process as a waveshaping DAC uses a dense control logic circuit while the high-voltage capability enhances the robustness of the transmitter and the receiver...
The electromagnetic susceptibility of Radio-Frequency (RF) Front-Ends is studied. A RF receiver has nonlinear properties induced by its first stages (Switch, Low-Noise Amplifier and Power Amplifier). Two tones are injected in the RF system, with interference signal power ranging from low to high level. It creates inband intermodulation products (IM), which are partly reflected at the input and become...
This paper deals with the effects of an electromagnetic interference (EMI) from an out-of-band signal impinging on a 2.4 GHz RF receiver operating in the linear regime. The injection signal is radiated in the near-field above the circuit package at a frequency of 60 GHz. Due to the nonlinear behavior of active devices, we observed a gain quenching leading to a complete inhibition of the receiver that...
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