UWB_Lecture01_v2 - Ultrawideband systems: Fundamentals and...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Ultrawideband systems: Fundamentals and Standardization Lecture 1 Min-Kuan Chang National Chung Hsing University 教育部通訊教改計畫 教育部通訊教改計畫 Outline • Introduction to UWB Technology • History of UWB Technology • Regulation – FCC ruling • UWB systems • IEEE 802.15.3a
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Introduction to UWB Technology Introduction to UWB • UWB radio is the generic term describing radio systems having very large bandwidths – for example, • One kind of definitions – “bandwidth greater than 25% of the center frequency measure at the - 10 dB points” – “RF bandwidth greater than 1 GHz” • Another kind of definitions – “The bandwidth of signal is more than 1.5GHz regardless of fractional bandwidth” – Low fractional bandwidth » fractional bandwidth: radio of the BW to the center frequency » Traditional RF principles, antenna, and etc can be adopted » High frequency carrier results in high attenuation of the signal
Background image of page 2
3 Introduction to UWB • UWB, short-range radio technology, complements other longer range radio technologies such as Wi-Fi, WiMAX, and cellular wide area communications – Suitable for media-rich consumer electronic and home entertainment systems – To achieve the idea of connectivity for “everybody and everything at any place and any time” Introduction to UWB Ultra-wideband radio technology: bandwidth comparison of different types of wireless systems (top); spectrum overlay principle (bottom) [8]
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Introduction to UWB Shannon s Channel Capacity Theorem: SNR) (1 log * B C 2 + = -10 0 10 20 30 40 0 2 4 6 8 10 12 14 x 10 8 SNR (dB) Channel Capacity (Bits/sec) 500 Mbps UWB NB 1 MHz 10 MHz 20 MHz 30 MHz 40 MHz 50 MHz 60 MHz 70 MHz 80 MHz 90 MHz 100 MHz 200 MHz 500 MHz 1 GHz Computed Bandwidths Introduction to UWB • Advantages: – Low power spectral density • A low probability of detection (LPD) signature • A low probability of interception • Suitable for convert military or sensitive usage – Communications • Extremely high data rate performance in multi-user network applications • Relativity immune to multipath cancellation effects as observed in mobile and in-building environments • Low interference to existing narrowband systems due to low power spectral density
Background image of page 4
5 Introduction to UWB • Advantages: – Optimally sharing the existing radio spectrum resources • No need for allocating new and dedicated radio spectrum – Low Power Consumption • Low cost: nearly "all-digital", with minimal RF electronics • Integrated Services: Communications and Radar Introduction to UWB • Potential Applications – Wireless Communications Systems • Local and Personal Area Networks (LAN/PAN) • Roadside Info-station • Short range radios • Military Communications • Wireless USB • Wireless multimedia-driven home networking – Medical • Heart monitoring – EM impulse vs. electrical impulse – Intrusive vs. non-intrusive medical monitoring
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 Introduction to UWB • Potential Applications – Radar and Sensing • Vehicles
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 34

UWB_Lecture01_v2 - Ultrawideband systems: Fundamentals and...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online