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A Quadrature Downconversion Autocorrelation Receiver Architecture for UWB

IEEE Conference 2004 on UWB Systems and Technologies. A Quadrature Downconversion Autocorrelation Receiver Architecture for UWB. Simon Lee, Sumil Bagga, Wouter A. Serdijn. Presented By: S M Riazul Islam. 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab.

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A Quadrature Downconversion Autocorrelation Receiver Architecture for UWB

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  1. IEEE Conference 2004 on UWB Systems and Technologies A Quadrature Downconversion Autocorrelation Receiver Architecture for UWB Simon Lee, Sumil Bagga, Wouter A. Serdijn Presented By: S M Riazul Islam 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

  2. Objectives To Develop a New UWB Receiver Architecture • No timing and template problems • Avoids processing at high frequency • Reduces power consumption • Narrowband interference rejection 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

  3. Contents • Introduction • System Analysis • Results and • Conclusion 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

  4. Introduction: Rake Receiver • Want of Perfect synchronization and matching of template with the received pulse • A lot of rake fingers are required, implementation point of view. • So, Transmitted reference scheme (autocorrelation receiver) [Hoctor and Tomlinson] 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

  5. IntroductionAutocorrelation Rx: DHTR Communication Direct processing of UWB: on-cheap parasitic reactance, so large currents or expensive high speed tech (GaAs) required Narrowband Interference: Both Rake Rx and Autocorrelation Rx suffer from this problem IEEE802.11a and Hiper LAN(5GHz), UWB antenna, and 2.4 GHz LAN 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

  6. IntroductionProposed Receiver Architecture 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

  7. System Analysis: Frequency Conversion • LO f= 6.85, 3.1 to 10.60 to 3.75 GHz. But WLAN of 5.5 1.35 GHz • LO f=5.5 GHz, converted BW extends to 5.1 and converted 2.4 GHz falls in band • Lo f=5.5 GHz, filter out below 5.5-5.15=0.35 GHz and above 5.5-2.4=3.1 GHz But loss of incoming frequency band? From 5.5+(5.5-5.15)=8.6 GHz to 10.6 GHz and from 5.15 to 5.85=0.7 GHz2.7 GHz, 36% or 1.9dB 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

  8. System Analysis: Mathematical Treatment Time domain analysis: Quadrature down-conversion autocorrelation Rx architecture: Delay, phase and amplitude mismatch: 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

  9. Simulated Results 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

  10. Conclusions • A new UWB receiver architecture has been introduced • It avoids high frequency processing gain and hence low power consumption, reject narrowband interference • Readily achievable in today’s IC tech. • Performance loss up to 1.9 dB compared to ideal case 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

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