Jussi Ryynänen

Direct conversion receiver for GSM900, DCS1800, PCS1900, and WCDMA

A single-chip, multi-mode direct conversion receiver designed for GSM900, DCS 1800, PCS 1900, and UTRA/FDD WCDMA, applications is described. The low-noise amplifier uses only four on-chip inductors. The downconversion mixers include a method to improve the receiver IIP2 to over +40dBm. The baseband circuit achieves over +90dBV IIP2. The noise figure of the SiGe BiCMOS receiver is less than 4.8dB in all GSM modes, and 3.5dB in WCDMA. The power consumption in all GSM modes is 42mW and in WCDMA 50mW. The silicon area is 10mm/sup 2/.

Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering

This paper presents a dynamically reconfigurable multiradio RF architecture concept, which can be used for RF platform and control optimization. The platform realization is based on the RF hardware and its configuration mechanisms. The related control software is realized through functional separation of configuration management and timing control. Both key HW and SW elements are discussed and optimization opportunities evaluated using high level analysis on key building blocks.