Showing papers by "Brian P. Gaucher published in 1999"
IBM1
TL;DR: Data characterizing the household AC power line in the 1-60 MHz band is presented and statistical characteristics of the delay spread, frequency response and noise can be extracted from the data and used in the design of AC powerline based communications systems.
Abstract: This paper presents data characterizing the household AC power line in the 1-60 MHz band. Two types of measurements were performed: transmission and noise sampling. The transmission measurements were done by using the impulse channel sounding method, so both the line attenuation and the delay spread were obtained. The noise measurements include: power line background noise, appliance noise, and noise sampled over a 24 hour period. Statistical characteristics of the delay spread, frequency response and noise can be extracted from the data and used in the design of AC power line based communications systems.
120 citations
Patent•
IBM1
TL;DR: An apparatus for data transfer using radio frequency (RF) energy, including a first software application that sources and links the data transmission, a second software application for controlling a communications hardware for the data transfer, a hardware device for formatting the data and gaining access to a media, and a physical layer interface hardware, coupled to selectively receive a signal representing the data from the hardware device and to provide an output to the hardware devices, for sending and receiving a radio frequency communication as mentioned in this paper.
Abstract: An apparatus for data transfer using radio frequency (RF) energy, includes a first software application that sources and links the data transfer, a second software application for controlling a communications hardware for the data transfer, a hardware device for formatting the data and gaining access to a media, and a physical layer interface hardware, coupled to selectively receive a signal representing the data from the hardware device and to provide an output to the hardware device, for sending and receiving a radio frequency communication. The second software application for controlling the communications hardware uses a target data transmission media of infrared light.
1 citations
Patent•
15 Oct 1999
TL;DR: In this paper, a cordless or radio communication system 500 generates the history table having columns assigned to plural channels and rows assigned to intervals between a remote station 510 and a base station 508.
Abstract: PROBLEM TO BE SOLVED: To improve the reliability of data transmission by scanning channels of radio communication, recording a channel having interference in an interval in a history table, determining the best channel having the least interference over the expected number of intervals, and updating it periodically. SOLUTION: A cordless or radio communication system 500 generates the history table having columns assigned to plural channels and rows assigned to intervals between a remote station 510 and a base station 508. The system 500 scans plural channels and a receive signal intensity display means which outputs a voltage proportional to interference determines a channel having interference in a given interval. The system 500 determines the best channel for communication having the least interference over the expected number of intervals in the history table wherein the decision is recorded and periodically updates it. Consequently, the system which is more robust and reliable can be obtained.
1 citations