In conventional transmission schemes the transmitter algorithms are a priori given, whereas the algorithms to be used by the receivers have to be a posteriori adapted. Such schemes can be termed transmitter (Tx) oriented. The opposite to Tx orientation would be receiver (Rx) orientation, in which the receiver algorithms are a priori given, and the transmitter algorithms have to be a posteriori ...

In the Dynamo project at UBC, we have developed an extensible facility for experimental mobile robotics. It currently consists of nine radio-controlled mobile robots, two CCD colour video cameras, a video transmitter and tuner, radio controllers, Datacube image processing hardware, and a network of transputers. Software for tracking, control, and simulation has also been developed. Ongoing proj...

We have developed a miniature high-power impulse transmitter for radio-echo sounding of glaciers. It features two synchronous second break-down pulse generators operating in a differential configuration. Specifications include bipolar 550 V pulses having rise times less than 2 ns, 512 Hz repetition rate, 180 mA at 10-14 V d.c. operating power, 5 mA standby current and maximum dimension of 12 cm...

A 120-GHz-band close-proximity wireless system that achieves the first 10-Gbit/s real-time transmission satisfying the regulation for extremely low-power radio stations (ELRS regulation). The use of photonic technologies enables the transmitter to perform 10-Gbit/s quadrature-phase-shift keying (QPSK) modulation and generate an RF spectrum with negligibly small spurious signals. The phase of th...

Received signal strength (RSS) ranging is not suitable in indoor environment due to complicated multipath signal propagation, leading to inaccurate distance estimation. This paper shows the experiments which collect RSSI signals in indoor environment for analysis. The objective of these experiments is to discover possible solution to reducing indoor lognormal shadowing effect. Two assumptions w...

Ad hoc network is a collection of wireless mobile nodes that dynamically form a temporary network without the use of any existing network infrastructure or centralized administration. A cognitive radio is a radio that can change its transmitter parameters based on interaction with the environment in which it operates. The basic idea of cognitive radio networks is that the unlicensed devices (co...

INTRODUCTION In the recent years short range unlicensed RF links have become very popular for a wide variety of applications in the field of remote controll data exchangee keyless entry sys-temss and otherss The most popular frequency in Europe for these links is 433392 MHzz

Software Defined Radio takes what used to be physically ingrained within the radio and provides a variety of hardware and software alternatives that add to it more flexibility and functionality. This project looks to implement a 16QAM communication system using a baseband receiver and transmitter and two USPR2 boards. It will show the benefits of Software Defined Radio (SDR) and will demonstrat...

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...

The relationship between behaviour of radio wave propagation and building architecture in a small indoor environment is examined. A site is divided into three partitions on the basis of number of walls between transmitter and receiver. Wideband radio propagation measurements are performed in each partition and the data analysed to compare channel characteristics in the partitions. Comparisons i...