We present a multi-user W-CDMA baseband channel unit processor for cellular base station applications.
This letter reports the performance of a W-band (75-110 GHz) high gain double-balanced active up-conversion mixer fabricated in a low-cost 200 GHz f(T) and f(max) 0.18 mu m SiGe BiCMOS technology.
High-power broadband amplifiers operating into impedances of less than 50 ohms have not been previously available. With the advent of optical modulators a need has arisen for such amplifiers.
We report a high efficiency multi-band Envelope-Tracking Power Amplifier (ET-PA) that supports modulation bandwidth up to 80MHz using real-time digital predistortion (RT-DPD).
An 83-GHz two-stage cascode power amplifier (PA) implemented in a low-cost 200/180-GHz fT/fmax 0.18-μm SiGe BiCMOS technology is presented.
The identification of deterministic multi-input multi-output (MIMO) systems is studied. An a priori condition for determining the identifiability of stable and unstable MIMO systems is derived.
A basic measurement made on a semiconductor material is its resistivity.
Based on the security requirement of mobile agent system, especially for the access control problem, we study the characterister of present mobile agent system, and find out its limitation.
This paper presents a new one-port de-embedding method demonstrated on a uni-traveling carrier photodiode (UTC-PD) technology for reliable on-wafer high frequency characterization.
Flow metrics are critical for protocol research, anomaly detection, network operation and application deployment.
