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A 2×2 MIMO(multi-input multi-output) for m-WiMAX (IEEE 802.16e) / WLAN (IEEE 802.11n), multi-mode / wideband transceiver system was developed. To design the transceiver system, the RF architecture was redesigned for the overall system, and a MIMO antenna, quad-band switchable front-end module (FEM), and reconfigurable RFIC were developed. Using embedded PCB technology, the transceiver system was integrated...
RF design has matured to the point where almost any wireless standard (e.g., GSM, WiFi, Bluetooth, etc.) and/or multiple standards operating in different bands can be integrated onto a single chip in deep submicron CMOS. This course is an in-depth tutorial that discusses many of the challenges facing the designer of a single-chip radio, and their solutions. The topics addressed in the course range...
Due to the rapid increase of wireless services below 6 GHz, multi-band multi-mode wireless terminals are becoming popular. In this paper, up/down-conversion schemes are reviewed, in addition the pros and cons are discussed. At the present, direct conversion scheme is the most appropriate for both transmitters and receivers of these terminals which are able to cover the 0.4-6 GHz RF frequency range...
Multi-mode, multi-band Softransceiver core allows seamless support for the second to the fourth generation of modern wireless standards. Targeting such a transceiver core becomes a stretch goal as one implementation needs to simultaneously meet the conflicting requirements for various standards. Such a goal is achieved by designing radio-frequency and baseband circuits such that various operational...
Development of reconfigurable RF resembles the Quest for the Holy Grail. It was started a long time ago; interesting developments have been achieved but it looks like it will never finish. However, as more and more microelectronic markets are under intense pressure, the need for reconfigurable RF systems is constantly growing. This paper aims at describing all current evolutions which push towards...
The design of a carrier-less RF-correlation-based IR-UWB TRX front-end in 130 nm CMOS is presented. Timing synchronization and coherent demodulation are implemented directly in the RF domain, enabling energy-efficient wireless communication at Gb/s data rates. A 25 ps timing resolution is achieved by a two-step synchronizer. Occupying 6.4 mm2 chip area, the TRX achieves a maximum data rate of 2 Gbps...
In this work, some most frequently studied interconnect solutions in recent years have been discussed and compared to show their advantages and limitations. RF wireless interconnect (RFWI) method is further studied by system modeling in simulink environment and successful communication between transmitter and receiver is obtained. The results indicate the potential feasibility and reliability of the...
This paper presents the integrated circuit design of an ultra-wideband (UWB) transceiver for a wireless endoscope that enables real-time diagnosis with high resolution images. The implemented UWB transceiver is a non-coherent transmit reference (TR) architecture with differential binary phase shift keying (DBPSK) modulation. All-digital pulse generator (PG) and merged radio frequency (RF) front end...
In ultra large-scale integrated (ULSI) circuits conventional approaches of hard-wired metal interconnects are encountering fundamental limits. In order to get beyond this problem different revolutionary interconnect approaches have been explored. One of the most feasible approaches is RF/wireless interconnects, which are based on low-loss and dispersion-free microwave signal transmissions, near-field...
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