Latest Sales and Marketing Guides
Directory - Virtual Office Assistance
Purchasing Resources for Online Marketing
Related Searches
Contents:
E.163,
E.164,
E.B. White,
E.E. Doc Smith,
E.F. Benson,
E.J. Bellocq,
E.L. Doctorow,
E.M. Forster,
E.O. Wilson,
E.P.,
E.T., the Extra-Terrestrial,
E.T.,
E.T. (video game),
E.T. Jaynes,
E.T. the Extra-Terrestrial,
E.U. Essien-Udom,
E.Y. Harburg,
E. B. White,
E. coli,
E. coli O157,
E. coli O157 H7,
E. E. Cummings,
E. E. Smith,
E. F. Hutton,
E. Gary Gygax,
E. Irving Couse,
E. M. Forster,
E. O. Wilson,
E. P. Thompson,
E. P. Thompson on Luddites,
E. Y. Harburg,
index,
...
Did you know?
A single-frequency network or SFN is a broadcast network where several
transmitters simultaneously send the same signal over the same frequency
channel.
Analogue FM and AM radio broadcast networks as well as digital broadcast
networks can operate in this manner. SFNs are not generally compatible with
analog television transmission, since the SFN results in ghosting due to echoes
of the same signal.
A simplified form of SFN can be achieved by a low power co-channel repeater,
booster or broadcast translator, which is utilized as gap filler transmitter.
The aim of SFNs is efficient utilization of the radio spectrum, allowing a
higher number of radio and TV programs in comparison to traditional
multi-frequency network (MFN) transmission. An SFN may also increase the
coverage area and decrease the outage probability in comparison to an MFN, since
the total received signal strength may increase to positions midway between the
transmitters.
SFN schemes are somewhat analogous to what in non-broadcast wireless
communication, for example cellular networks and wireless computer networks, is
called transmitter macrodiversity, CDMA soft handoff and Dynamic Single
Frequency Networks (DSFN).
SFN transmission can be considered as a severe form of multipath propagation.
The radio receiver receives several echoes of the same signal, and the
constructive or destructive interference among these echoes (also known as
self-interference) may result in fading. This is problematic especially in
wideband communication and high-data rate digital communications, since the
fading in that case is frequency-selective (as opposed to flat fading), and
since the time spreading of the echoes may result in intersymbol interference (ISI).
Fading and ISI can be avoided by means of diversity schemes and equalization
filters.
Business Directory and Guide
The most popular sectors: Computer Software, Document Management Software, Help Desk Software, Language Translation Software, Legal Software, Medical Software, Mortgage Software, Multimedia Software, Programming Software, Property Management Software, Small Business Software, Free Software, Tax Software, Training Software, Transcription Software, Shopping cart software, Computers, Data Storage, Electronics, IT Services, Ipad Accessories, Networking Equipment, Servers, Tablets, Technology, Web Conferencing, Web Design, Web Hosting...
Purchasing Resources for Web Design - Find Trusted Web Design Vendors