目錄
PowerPoint 簡報
PowerPoint 簡報
Introduction to OFDM
What is OFDM and COFDM ?
Why OFDM ?
Why OFDM ?(cont.)
Basic FFT, OFDM Transmitter
Basic FFT, OFDM Rreceiver
Code Division Multiple Access
Basic CDMA transmission
Concept of CDMA
Direct sequence modulator and Direct sequence signals
無線通信的多接技術 - 劃碼多接(cont.)
劃碼多接的例子
劃碼多接的例子(cont.)
W-CDMA Systems have Unity Frequency Re-use
Walsh matrix
The block diagram of an OFDM modulator/demodulator
The Difference between OFDM and FDM
The Block Diagram of a Basic OFDM System
Advantages and Disadvantages of OFDM
The block diagram of an OFDM modulator
Principle of Multicarrier Code-Division-Multiple-Access (MCCDMA)
Principle of Multicarrier Code-Division-Multiple-Access (MCCDMA)
The block diagram of an OFDM modulator
Compared RESULTS
WHAT IS ORTHOGONAL MULTI-CARRIER CDMA?
The block diagram of an OFDM modulator
The block diagram of an OFDM modulator
The block diagram of an OFDM modulator
The block diagram of an OFDM modulator
Radio Propagation Effects
Radio Propagation Effects
Multipath Effects - Rayleigh fading
Cumulative distribution for Rayleigh distribution
Frequency Selective Fading
Delay Spread
Delay Spread(cont.)
Delay Spread(cont.)
Doppler Shift
|