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ECEN 621-600 “ Mobile Wireless Networking ”

ECEN 621-600 “ Mobile Wireless Networking ”. Course Materials: Papers, Reference Texts: Bertsekas/Gallager, Stuber, Stallings, etc Grading (Tentative) : HW: 20%, Projects: 40%, Exam-1:20%, Exam-II:20% Lecture notes and Paper Reading Lists: available on-line

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ECEN 621-600 “ Mobile Wireless Networking ”

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  1. ECEN 621-600 “Mobile Wireless Networking” Course Materials: Papers, Reference Texts: Bertsekas/Gallager, Stuber, Stallings, etc Grading (Tentative): HW: 20%, Projects: 40%, Exam-1:20%, Exam-II:20% Lecture notes and Paper Reading Lists: available on-line Class Website: http://ece.tamu.edu/~xizhang/ECEN621/start.php Research Interests and Projects: URL:http://ece.tamu.edu/~xizhang Instructor: Professor Xi Zhang E-mail: xizhang@ece.tamu.edu Office: WERC 331

  2. Characterizations and Modeling of the Wireless Channel Lecture Notes 9.

  3. Doppler spread effect and Doppler spread function • Both non-linear and time-varying system introduce new frequency components other than those existing in the input signal • In wireless propagation environments, mobility of mobile users and/or surrounding scatterers, the channel is linear but time variant  introduce frequency shifts to transmitted signal • This phenomenon of adding new frequency shift to transmitted signal is call Doppler Effect and introduced frequency shifts are called Doppler Shifts ECEN 621, Mobile Wireless Networks

  4. Input/output model of Wireless Channel Linear time-variant (LTV) channel ECEN 621, Mobile Wireless Networks

  5. Doppler frequency dispersion • Both non-linear and time-varying system introduce new frequency components other than those existing in the input signal • In wireless propagation environments, mobility of mobile users and/or surrounding scatterers, the channel is linear but time variant  introduce frequency shifts to transmitted signal • This phenomenon of adding new frequency shift to transmitted signal is call Doppler Effect and introduced frequency shifts are called Doppler Shits ECEN 621, Mobile Wireless Networks

  6. Doppler-spread function • Both non-linear and time-varying system introduce new frequency components other than those existing in the input signal • In wireless propagation environments, mobility of mobile users and/or surrounding scatterers, the channel is linear but time variant  introduce frequency shifts to transmitted signal • This phenomenon of adding new frequency shift to transmitted signal is call Doppler Effect and introduced frequency shifts are called Doppler Shits ECEN 621, Mobile Wireless Networks

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