This document reports on a carefully designed set of fixed and mobile reception tests in Mexico City on the DRM (Digital Radio Mondiale) system at a frequency in the uppermost shortwave broadcasting band – around 26 MHz – for local broadcasting. The testing was done during July 2005. These were not operational tests; that is, neither the transmitter antenna, nor antenna location, nor transmitte...

RF circuits for multi-GHz frequencies have recently migrated to low-cost digital deep-submicron CMOS processes. Unfortunately, this process environment, which is optimized only for digital logic and SRAM memory, is extremely unfriendly for conventional analog and RF designs. We present fundamental techniques recently developed that transform the RF and analog circuit design complexity to digita...

Radio has always been part of our lives. It has also been a profitable business since the early days of broadcasting. Today, all sorts of digital devices have combined to create a ‘selfmedia’ environment that resituates radio, in the face of new challenges. This essay is based in a deeper understanding of radio broadcasting as a cultural industry and audience behavior to focus on groundbreaking...

In this paper, we present an educational approach that employs “hands-on” software-defined radio experimentation in the instruction of digital communication systems theory to electrical and computer engineering students. By prototyping and evaluating actual digital communication systems capable of performing “over-the-air” wireless data transmission and reception, students enrolled in this cour...

The ability to support multiple channels of different communication standards, in the available bandwidth, is of importance in modern software defined radio (SDR) receivers. An SDR receiver typically employs a channelizer to extract multiple narrowband channels from the received wideband signal using digital filter banks. Since the filter bank channelizer is placed immediately after the analog-...

Design of RF/IF Analog to Digital Converters for Software Radio Communication Receivers. (May 2006) Bharath Kumar Thandri, B.E. (Hons.), Birla Institute of Technology and Science (BITS), Pilani, India; M.S., Texas A&M University Chair of Advisory Committee: Dr. Jose Silva-Martinez Software radio architecture can support multiple standards by performing analogto-digital (A/D) conversion of the r...

With the emergence of digital broadcast technology, we are coming to be familiar with the idea that digital doesn’t just mean more services, it also means different services. Some of theses new types of service will undoubtedly derive much from technology that has previously only been available from media such as CDROMS and the Internet, while other ‘data’ services can be foreseen that will all...

The advances in radio design and wireless networking, along with the growth of multimedia home entertainment technologies, is creating the concept of a cognitive digital home requiring spectrum coexistence of various devices and networks of networks. In this paper, we introduce a framework for resource allocation in a cognitive digital home with a multiplicity of radio access technologies (RAT)...

Concomitantly with the progress of wireless communications, cognitive radio has attracted attention as a solution for depleted frequency bands. Cognitive radio is suitable for wireless sensor networks because it reduces collisions and thereby achieves energy-efficient communication. To make cognitive radio practical, we propose a low-power multi-resolution spectrum sensing (MRSS) architecture t...

Today’s digital TVs can provide advanced functionalities such as DVR, EPG, and PIP. They require simultaneous access to multiple channels using additional hardware resources, which increases the cost. In order to solve this problem, we propose to use wideband software defined radio (SDR) that can demodulate multiple channels on a single radio frontend. Through the SDR, we can obtain multiple ch...