tailieunhanh - Mobile & Wireless Networking – Lecture 2: Wireless Transmission - Geert Heijenk

Wireless Transmission: Modulation, Spread Spectrum, Orthogonal Frequency Division Multiplexing (OFDM). Modulation: Process of encoding information from a message source in a manner suitable for transmission.   | 262001 Mobile Wireless Networking Lecture 2 Wireless Transmission 2 2 Schiller Section Reader Part 1 OFDM An architecture for the fourth generation Geert Heijenk Mobile and Wireless Networking 2009 2010 Outline of Lecture 2 Wireless Transmission 2 2 Modulation Spread Spectrum Orthogonal Frequency Division Multiplexing OFDM 2 Mobile and Wireless Networking 2009 2010 Modulation Process of encoding information from a message source in a manner suitable for transmission Two major steps 1. Digital modulation digital data is translated into an analog signal baseband 2. Analog modulation shifts center frequency of baseband signal up to the radio carrier Motivation smaller antennas . Ầ 4 Frequency Division Multiplexing medium characteristics 3 Mobile and Wireless Networking 2009 .

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