This paper provides a detailed description of the IBM SiGe BiCMOS and rf CMOS technologies. The technologies provide high-performance SiGe heterojunction bipolar transistors (HBTs) combined with advanced CMOS technology and a variety of passive devices critical for realizing an integrated mixed-signal system-on-a-chip (SoC). The paper reviews the process development and integration methodology, presents the device characteristics, and shows how the development and device selection were geared toward usage in mixed-signal IC development. 1.

Bluetooth is a communications standard targeting shortrange wireless communications with data rates of 1Mb/s at 10m distance. To encourage Canadian universities to pursue this commercially promising standard the Canadian Microelectronics Corporation is providing the intellectual property for a Bluetooth SOC Reference Platform. This platform does not currently include an RF transceiver core. This work describes a research effort made at the University of Calgary to build a compatible RF transceiver core in aCMOS0.18m process. A brief Bluetooth specification translation process to derive the frequency synthesizer system specifications is presented. A pilot PCB Bluetooth frequency synthesizer is presented together with specific measurements made at NEWT, TRLabs' new test and measurement facility. Finally, a fully integrated Bluetooth frequency synthesizer implemented in a CMOS 0.18m process is presented. 1.

this paper is an asymmetric adaptation of orthogonal frequency division multiplexing (OFDM). In a conventional OFDM system, the signal processing hardware is divided equally between the base station and the terminal. In the asymmetric system, most of the complex signal processing hardware is shifted to the base station, making the terminal a simpler and more power-efficient device. To send information to the base station, the terminal transmits a series of QPSK symbols that make up an OFDM-code. The code is designed to distribute the signal's energy into a number of OFDM sub-carriers which can be detected and combined within the base station's OFDM receiver. Other users transmit the same OFDM-codes within the same bandwidth and at the same time, but with slightly offset carrier frequencies. Because of the nature of OFDM, the codes from different users remain orthogonal, even with multipath dispersion. OFDM signals transmitted from the base station are detected at the terminal using a decimator-accumulator structure

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Abstract—A maximum-likelihood sequence estimation (MLSE) receiver is fabricated to combat dispersion/intersymbol interference (chromatic and polarization mode), noise (optical and electrical), and nonlinearities (e.g., fiber, receiver photodiode, or laser) in OC-192 metro and long-haul links. The MLSE receiver includes a variable gain amplifier with 40-dB gain range and 7.5-GHz 3-dB bandwidth, a 12.5-Gb/s 4-bit analog-to-digital converter, a dispersion-tolerant phase-locked loop, a 1:8 demultiplexer, and a digital equalizer implementing the MLSE algorithm. The MLSE receiver achieves more than 50 % reach extension at signal-to-noise levels of interest as compared to conventional clock data recovery systems. Index Terms—A/D converter (ADC), clock data recovery (CDR), demultiplexer (DEMUX), electronic dispersion compensation (EDC), electronic post-detection equalization (EDE), G.709 optical transport network (OTN), high-speed ASIC, maximum-likelihood sequence estimation (MLSE), OC-192, phase-locked loop (PLL), variable gain amplifier (VGA). I.

Abstract not found