MISTRAL is a millimetric camera working in the W-band (78–103 GHz) which will take data from Sardinia Radio Telescope, Italian 64-m radio telescope located 50 km form Cagliari, at 600m above sea level, Sardinia. It being built as facility instrument by Sapienza University for INAF, that manages telescope, under PON contract. consist of compact cryostat hosting re–imaging optics, cooled 4K, and ...

The last decades have been really hungry in new ways to reduce energy consumption. That is especially true when talking about wireless sensor networks in general and home multimedia networks in particular, since electrical energy consumption is the bottleneck of the network. One of the most energy-consuming functional block of an equipment is the radio front end, and methods to switch it off du...

Applications In this paper A single chip 2.4GHz low power CMOS receiver and transmitter for WPAN applications are implemented and measured. The receiver uses a low-IF architecture with a polyphone filter and transistor linearization technique to improve linearity per power, and the transmitter adopts a ROM based direct-conversion architecture for low power consumption and high integrated densit...

In our software-defined radio project we aim at combining two standards: Bluetooth and HiperLAN/2. The HiperLAN/2 receiver requires the most computation power in comparison with Bluetooth. We choose to use this computational power also for Bluetooth and look for more advanced demodulation algorithms such as a Maximum A posteriori Probability (MAP) receiver. This paper discusses a simplified MAP...

The C-Band All-Sky Survey is a project to map the full sky in total intensity and linear polarization at 5 GHz. The northern component of the survey uses a broad-band singlefrequency analogue receiver fitted to a 6.1-m telescope at the Owens Valley Radio Observatory in California, USA. The receiver architecture combines a continuous-comparison radiometer and a correlation polarimeter in a singl...

This paper presents a comparison of different configurations of a wireless sensor system for capturing human motion. The systems consist of sensor elements which wirelessly transfers motion data to a receiver element. The sensor elements consist of a microcontroller, accelerometer(s) and a radio transceiver. The receiver element consists of a radio receiver connected through a microcontroller t...

This paper presents an architecture for multi-mode terminals, strictly speaking multi-mode receivers, exploiting IF sampling with Sigma-Delta ADCs. It is shown that Sigma-Delta ADCs are not only an efficient means of digitizing signals but are a nearly perfect fit to the task of analog-to-digital conversion in multi-mode terminals. For further processing the digitized signal, i.e. channel filte...

Cognitive radio systems capable of opportunistic spectrum access represent a new paradigm for improving the efficiency of current spectrum utilization. In this work, we present a novel cognitive channel access method based on learning from both primary channel transmissions and the receiver ARQ feedback signals. This new sensing-plus-confirmation scheme constitutes a non-trivial generalization ...

Cognitive Radio technology helps in designing wireless system for efficient deployment of radio spectrum with its sensing technique, self-adaptation and spectrum sharing. Spectrum sharing is an effective method of alleviating the scarcity of radio spectrum problem by allowing unlicensed users(secondary users) to coexist with licensed users (primary users) under the condition of protecting the l...