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Microwave System Ultra-Wideband

Microwave System Ultra-Wideband. Dr. Allam Mousa. Mohammed AL Donbok. Introduction. Properties. Matlab. Technique Of UWB. Challenges. Application. Introduction.

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Microwave System Ultra-Wideband

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  1. Microwave SystemUltra-Wideband Dr. AllamMousa Mohammed AL Donbok

  2. Introduction

  3. Properties

  4. Matlab

  5. Technique Of UWB

  6. Challenges

  7. Application

  8. Introduction • Historically, UWB radar systems were developed mainly as a military tool (accurate radar and low probability of intercept communications) • Ideal targets for UWB systems are low power, low cost, high data rates, precise positioning capability and extremely low interference. • The typical sinusoidal radio wave is replaced (carrier-free ) by trains of pulses at hundreds of millions of pulses per second. The wide bandwidth and very low power makes UWB transmissions appear as background noise.

  9. UWB AND SHANNON’S THEORY • C is the maximum channel capacity [bits/second]. • B is the channel bandwidth [Hz]. • S is the signal power in watts [W].. • N is the noise power[W]

  10. way of looking at wireless communication is the tradeoffs between: • The distance between transmitter and receiver • Simultaneous communication for many users • sending the data very quickly • sending and receiving a large amount of data But at the expense of, in the main, distance

  11. Basic properties of UWB • POWER SPECTRAL DENSITY • PULSE SHAPE • PULSE TRAINS • SPECTRAL MASKS • MULTIPATH • PENETRATION CHARACTERISTICS • SPATIAL AND SPECTRAL CAPACITIES • SPEED OF DATA TRANSMISSION • COST • SIZE • POWER CONSUMPTION

  12. 1- POWER SPECTRAL DENSITY • The power spectral density (PSD) is defined as where P is the power transmitted in watts (W), B is the bandwidth of the signal in hertz (Hz), and the unit of PSD is watts/hertz (W/Hz). • One of the benefits of low-power spectral density is a low probability of detection, which is of particular interest for military applications.

  13. 2-PULSE SHAPE

  14. Matlab

  15. 3- PULSE TRAINS

  16. 4 - SPECTRAL MASKS FCC regulates UWB frequency range from 3.1GHz to 10.6GHz and transmission power at a limitation of -41dBm/MHz.

  17. 5- MULTIPATH • In the real world objects between the transmitter and the receiver cause the physical effects of reflection, absorption, diffraction, and scattering, and this gives rise to multiple paths.

  18. 6-PENETRATION CHARACTERISTICS • One of the most important benefits of the UWB communication system that has been raised is the ability of pulses to easily penetrate walls, doors, partitions, and other objects in the home and office environment. The penetration capabilities of UWB come only from the lower frequency components .

  19. 7- SPATIAL AND SPECTRAL CAPACITIES

  20. 8- SPEED OF DATA TRANSMISSION

  21. 9- COST The low component count leads to reduced cost, and smaller chip sizes invariably lead to low-cost systems. The simplest UWB transmitter could be assumed to be a pulse generator, a timing circuit, and an antenna.

  22. 10- SIZE consumer electronics companies have targeted the size of the wireless circuit will be small enough to fit into a Memory Stick or SD Card

  23. 11- POWER CONSUMPTION

  24. Comparative Study of Wireless Protocols

  25. Modulation Technique • There are various baseband modulation schemes that have been studied

  26. PPM and BPSK are good candidates for UWB • They have a better bit energy performance than PAM or OOK. BPSK-Modulation PPM-Modulation

  27. UWB Transmitter

  28. UWB Receiver

  29. Challenges While UWB has many reasons to make it an exciting and useful technology for future wireless communications and many other applications, it also has some challenges which must be overcome : • Regulatory problems • Other challenges include the industry coming to agreed standards for interoperability of UWB devices.

  30. Application • Military applications • Time Domain UWB signal generator • Home networking and home electronics • XtremeSpectrum • Intel Corporation • Motorola • Wisair AND MORE….

  31. Military applications • As with many wireless communication technologies the military has been the major driving force behind the development of UWB. In particular, Radar applications have been developed by the military for many years.

  32. Home networking and home electronic

  33. WISAIR • WISAIRis a startup company based in Israel. • The most interesting technical feature of the Wisair chipset is that it uses the multi-band approach, dividing the ultra wideband wireless channel spectrum into several narrower bands. In this chipset, there are 30 possible sub-bands, of which 1–15 can be used.

  34. Wisair UBLINK Chipset

  35. Comments ?

  36. Thank you

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