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5G Spectrum challenges
Presents a collection of slides covering the following topic: 5G network; and wide area M2M.
IET 5G Radio Technology Seminar
Presents a collection of slides covering the following topics: 5G radio technology; connectivity; latency; reliability; energy efficiency; fundamental capacity limits; air-interface KPI; full duplex radio; testbed baseline configuration; an...
The problem with 5G
Parallel-Processing-Based Digital Predistortion Architecture and FPGA Implementation for Wide-band 5G Transmitters
This paper presents a bandwidth-scalable and hardware-efficient parallel-processing-based D PD architecture for wide-band 5G transmitters. By computing multiple data samples at each clock cycle in parallel, the proposed DPD architecture ext...
Phase Calibration of a Massive MIMO System for Direction of Arrival Applications
In this paper we perform a Uniform Linear Array (ULA), Multiple Input Multiple Output (MIMO) system calibration, to measure the Direction of Arrival (DoA) of multiple User Equipment (UE). We consider wired, wireless, Over-the-Air (OTA) cali...
Pattern Sensing Based Digital Predistortion of RF Power Amplifiers under Dynamical Signal Transmission
In this paper, a pattern sensing based digital predistortion (DPD) technique for radio frequency (RF) power amplifiers (PAs) under dynamical signal transmission is proposed. Unlike conventional methods where real time re-calibration is requ...
Digital Cancellation of Passive Intermodulation: Method, Complexity and Measurements
This paper addresses digital cancellation of passive intermodulation (PIM) products in simultaneous transmit-receive systems, with specific emphasis on frequency-division duplexing (FDD) based LTE and 5G New Radio (NR) networks. Building on...
Linearizing Active Antenna Arrays: Digital Predistortion Method and Measurements
In this paper, we provide a novel framework for efficient digital predistortion (DPD) based linearization of active antenna arrays with multiple and mutually different nonlinear power amplifiers. The proposed method builds on the use of a c...
Flexible Architectures for Concurrent Reception of Multiple RF Carriers and Compressed-Sampling Signal Detection in Frequency and Direction-of-Arrival
The modulated-clock downconversion mixer (MC-DM) and the antenna-weight-modulated phased-array (AWM-PA) are explored as key enablers of ambient-aware, opportunistic receivers in emerging 5G deployments. The benefits of the MC-DM is demonstr...
Wideband Front-End Integration and Unification of Circuit-Antenna for Simultaneous Stabilized Amplification and Steered Radiation
A wideband front-end integration of amplifying transistor within array antenna is proposed, analyzed and demonstrated in this paper, for simultaneous stabilized amplification and beam steered radiation, in a unified space. Source degenerati...