UWB Ad-Hoc Networks Essay Example | Topics and Well Written Essays - 10000 words

UWB Ad-Hoc Networks - Essay Examplegnal has a bandwidth that exceeds the lesser of 500 megacycle per support or 20% of the center frequency, there is an authorized unlicensed use of the frequency govern starting line from 3.1 GHz and up to 10.6GHz, also the emission limit is -41.3 dBm/MHz. This technology uses the Impulse Ratio (IR) method for its transmittal the rate is different for radar and imaging purposes to the communication purposes. The rate of impulses for radar and imaging is in the range of 1 to 100 mega pulses per second. The communication rate can be in a range of 1 to 2 giga pulses per second.This diagram shows how much faster Ultra Wide Band technology is over all existing current technologies also it provides a towering level of mobility which is important for a mobile devices it is mean for.The advantage of UWB over traditional radio transmissions is that traditional way would be to modulate the frequency and variety of the signal as well as power, of a sin usoidal wave. However UWB transmits impulse at a specific time, there fore it allows pulse position modulation and time modulation.Among the advantages of UWB that helps to prevent multi path propagation. It gives the hazard of the system to establish the time for an impulse to travel from the transmitter to the receiver in the direct path.The separate advantage of UWB IR system is the short length of pulses does not allow them to overlap so the multipath fading is not an issue in this case. On the other hand in a system with high pulse rate there can be inter-path interference, it can be eliminated by error bailiwick coding at the receiver.UWB can be combined with multiple antenna technology that doesnt precisely allow increase in transmission speed but increases the reliability of the channel, there are a number of solutions that can increase the transmission speed over the regular SISO (single-input single-output)Technologies like multiple-input and multiple-output (MIMO) al lows reaching gigabits per second range of transmission speed.