Lauro joined Award Solutions in 2008, bringing over ten years of experience in the wireless telecommunication industry working with mobile cellular, broadband and satellite communications. Has a thorough knowledge and understanding of all standardized radio transmission technologies (i.e.: GSM, GPRS, EDGE, WCDMA, HSxPA, HSPA+,IS-95, cdma 1xRTT, 1xEV-DO) and non-standardized technologies (i.e.: Flash OFDM, I-Burst, etc.) as well as and their migration path to 4G and beyond (LTE and WiMAX).
Lauro has co-authored four different telecommunication books, has published 18 international refereed journal papers and over 30 international conference papers, all of them results of research in the wireless telecommunication area. Additionally, has presented over 20 different wireless related courses nationally and internationally to a diverse class of clients. Lauro has a thorough knowledge of mathematical analysis and hands-on experience on wireless and traffic engineering design, including Design, Planning, Performance & Optimization as well as computer simulation of mobile wireless networks. Through research and computer simulation techniques has helped a large base of clients (carriers, vendors, new start up companies) develop optimum technological solutions.
Currently, Lauro is one of the instructors at Award Solutions. His current focus is UMTS, HSPA/HSPA+ and LTE. He is also involved in the development of cutting edge training on optimization courses for LTE operators in the USA.
Lauro holds a Ph.D. in electrical engineering (EE) from King's College London, UK (the University of London), a MSc. In EE. and a B.EE from the National Polytechnic Institute, Mexico, all of them with specialty in telecommunications.
This blog aims at providing some of the (difficult to find) most uncommon sources of interference in the 700 MHz band.
The common sources of interference are:
a) Inter-modulation products: This is typical in all cellular systems. This is due to amplitude modulation of signals containing two or more different frequencies in a system with nonlinearities. This problem is typically solved by separating (vertically) the antennas of the systems involved (if deployed in the same tower).
b) Cellular Jammers: Although illegal in the USA, at the 700 MHz band, several cell jammers have been found in very rare places. Examples of such locations are:
c) Wireless Microphones: Some wireless microphones operating at the 700 MHz emit out of band emissions in that frequency band that interfere some of the bands utilized for LTE. This source of interference is, as the rest, difficult to find as this microphone type is used practically every kind of event!
d) Light bulbs: A particular model of energy efficient light bulbs produced by LG produce interference at the 700 MHz band. Believe it or not!
Have you spotted another one? Please do let us know… we need to find them.
There are some garage door openers that can also cause interference in 700 MHZ band