the complexity of the transmission space in the Radio Transmission contributes to what?
363774
Radio propagation\nRadio propagation is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another.\n\nIn free space, all electromagnetic waves (radio, X-rays, visual, etc) obey the inverse-square law which states that an electromagnetic wave's strength is proportional to 1/(x2), where x is the distance from the source. Doubling the distance from a transmitter means the strength is reduced to a quarter, and so on.\n\nRadio propagation on Earth is not only affected by the inverse-square model, but by a number of other factors determined by its path from point to point. This path can be a direct line of sight path or an over-the-horizon (see also radio horizon) path aided by reflection from the ionosphere. A variety of phenomena make radio propagation more complex.\n\nSince radio propagation is somewhat unpredictable, such services as emergency locator transmitters, in-flight communication with ocean-crossing aircraft, and some television broadcasting have been moved to satellite transmitters. A satellite link, though expensive, can offer highly predictable and stable coverage of a given area.\n\nA sudden ionospheric disturbance is often the result of large solar flares directed at earth. These solar flares can disrupt HF radio propagation.\n\nPropagation modes\nRadio waves at different frequencies propagate in different ways.\n\n\nThe Antenna\nThe beginning and end of a communication circuit is the antenna. The antenna will provide gain and directivity on both transmit and receive. The take off angle of the antenna is based on the type of antenna, the height of the antenna above ground, and the type of ground below and in front of the antenna. The take off angle will determine the angle of attack on the ionosphere, which will effect if and where the signal will be reflected by the ionosphere.\n\nGround wave Propagation\nGround waves are radio waves that follow the curvature of the earth. Ground waves progress along the surface of the earth and must be vertically polarized to prevent short circuiting the electric field through the conductivity of the ground. Since the ground is not a perfect electrical conductor, ground waves are attenuated as they follow the earth’s surface. At low frequencies, ground losses are low and become lower at lower frequencies. The VLF and LF frequencies are mostly used for military communications, especially with ships and submarines.\n\nEarly commercial and professional radio services relied exclusively on long wave, low frequencies and ground-wave propagation. To prevent interference with these services, amateur and experimental transmitters were restricted to the higher (HF) frequencies, felt to be useless since their ground-wave range was limited. Upon discovery of the other propagation modes possible at medium wave and short wave frequencies, the advantages of HF for commercial and military purposes became apparent. Amateur experimentation was then confined only to authorized frequencies in the range.\n\nLine-of-Sight Propagation\nGround plane reflection effects are an important factor in VHF line of sight propagation. The interference between the direct beam line-of-sight and the ground reflected beam often leads to an effective inverse-fourth-power law for ground-plane limited radiation.\n\nSkywave Propagation\nSkywave propagation is any of the modes that rely on reflection of radio waves from the ionosphere, which is made up of one or more ionized layers in the upper atmosphere. These layers are directly affected by the sun, and its varying activity (sunspot cycle) determines the utility of these modes. Forecasting of skywave modes is of considerable interest to amateur radio operators and commercial marine and aircraft communications, and also to shortwave broadcasters.\n\nTropospheric Scattering\nAt VHF and higher frequencies, the atmosphere at a height of around 6 miles (10 kilometres) can scatter some of the norm
189047
Radio waves store the information in the amplitude and frequency of the wave.\n\nIt is similar to how the voltage in a computer to create the 1s and 0s that make up the information you see on the screen.
157324
Degradation caused by practical limitations of channels (eg, signal level loss due to attenuation, echo. various types of signal distortion, etc.), or interference induced from outside the channel (such as power-line hum or interference from heavy electrical machinery).
252949
It's basically one way to encapsulate data.  If you send a 1 MB transmission it is chopped into smaller bits so that it can be sent efficiently.  One way to do this is frame relay, another way is ATM.
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The frequesncy that it is broadcast on.
101135
Single sideband transmission can afford, "efficient spectrum use, bettter signal-to-noise ratios at low signal levels and better transmitter efficiency" per "Conclusion" on P. 7 of link.  Good luck.
143763
a signal emmited in the band of the 2 GHz.
128653
It is the medium through the ideas are sent to the real world objects through the hierarchy of the class structure.\nthe objects at the lower level does the physical work of executing the task.\nthe communication need to be exact,apt and precise,timely and with authority.
237400
An channel in communications will allow a certain range of frequencies to pass through it without attenuating (removing) it too much. In band pass communications this is a range of frequencies in the electromagnetic spectrum (eg. 400MHz-500MHz is a possible wireless frequency. In baseband communication the range is between 0 and a certain value and this is not normally suitable for wireless communications carriers.
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The difference in frequency has all to do with the coverage of a cell. 1800s cover less area (More the frequency, more attenuation, less area) 900s cover more.\n\nThe base station that transmits the voice to cellphones do that on a TDMA and FDMA basis. \n\nIf you need to do the shift of frequencies, you will have to look for the neighbouring cells and their frequencies.
495154
a wireless communication standard.
359870
for analog transmission, wave form\nfor digital transmission, on and off bits
1109557
1) You must first of all be aware that radio waves, light, infrared, x-rays, all these are electromagnetic radiation, only with different frequencies; they are pure energy, without mass, transmitted through space by photons at the speed of light. That is the fastest way of communication there can be in the universe, assuming that nothing travels faster than the speed of light.\n\n\n2) Radio waves were chosen from the electromagnetic spectrum because they include the Water Hole, which is the band of electromagnetic frequencies between 1420 MHz and 1640 MHz. This is the band between the hydrogen line and the strongest hydroxyl spectral line, and is notable because it is a quiet region between two notable frequencies; The combination of hydrogen and hydroxyl yields water (the "water" part of the name); the "hole" part refers to the sudden drop in radio noise (the universe background radiation) within this band. Several SETI programs, including SETI@home search in the Water Hole.\n\n\n3) It has been proposed that higher frequency signals, such as lasers operating at visible light frequencies, may prove to be a fruitful method of interstellar communication; at a given frequency it takes surprisingly small energy output for a laser emitter to outshine its local star from the perspective of its target.\n\nOther more exotic methods of communication have been proposed, such as modulated neutrino or gravitational wave emissions. These would have the advantage of being essentially immune to interference by intervening matter, but are very difficult to generate or detect with current technology.\n\nSending physical mail packets between stars may prove to be optimal for many applications. While mail packets would likely be limited to speeds far below that of electromagnetic or other light-speed signals (resulting in very high latency), the amount of information that could be encoded in only a few tons of physical matter could more than make up for it in terms of average bandwidth.Starting in 1979, Robert Freitas advanced arguments for the proposition that physical space-probes provide a superior mode of interstellar communication to radio signals, then undertook telescopic searches for such probes in 1979 and 1982.
195049
The definition above is right: Is about tramistting and receiving the asme information in two different frequencies.\nFrequency diversity is used to improve the link performance. Normally you use two outdoor units atteched thru a coupler to an antenna, each ODU drives one frequency into the antenna.
715101
The station generates the signal.  The carrier wave has to be at the specific frequency for which they are licensed, and can not deviate from that any more than standard modulation is allowed.  They are also licensed for how much broadcast power they use.
127155
Full duplex transmission is functionally much simpler than half-duplex transmission because it involves no media contention, no collisions, no need to schedule retransmissions, and no need for extension bits on the end of short frames.The only restriction is that there must be a minimum-length interframe gap between successive frames.\n\nAlso, such networks are usually "Switched Networks", which means seperate collision domain for each line, thus eliminating the need of CSMA/CD.
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Only if they are at the same distance from the station and the same atmospheric conditions. The farther the receiver, the longer it takes for the signal to be received.