OFDMA

INTRODUCTION, WORKING, FIGURE

1. OFDMA (Orthogonal Frequency Division Multiple Access) A cellular air interface based on OFDM  for multiple, simultaneous users u sed in communications networks such as WiMAX and LTE,  OFDMA  provides air interfaces that are superior to CDMA and TDMA.

2. What does Ofdma do? Orthogonal frequency-division multiple access ( OFDMA ) is a multi-user version of the popular orthogonal frequency-division multiplexing (OFDM) digital modulation scheme. Multiple access is achieved in  OFDMA  by assigning subsets of subcarriers to individual users.

3. What is the difference between OFDM and Ofdma and what is in common? The main  difference between  an  OFDM  and an  OFDMA  (Orthogonal Frequency Division Multiple Access) system if the fact that in the  OFDM  the user are allocated on the time domain only while using an  OFDMA  system the user would be allocated by both time and frequency

4. What is OFDM and how it works? OFDM  is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method. A large number of closely spaced orthogonal sub-carrier signals are used to carry data on several parallel data streams or channels.

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