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Tell me what is the difference between SC-FDMA and OFDM modulation techniques in WiMAX?
Answer:
★ SC-FDMA means Single Carrier Frequency Division Multiple Access and OFDM means Orthogonal Frequency Division Multiplexing.
★ SC-FDMA system usually will have low PAPR compare to OFDM system.
★ SC-FDMA system is less sensitive to frequency offset compare to OFDM system.
★ SC-FDMA is widely used in LTE subscriber terminals in the transmit path and its variant OFDMA is used in the eNodeB downlink(or receive path of LTE subscribers).
★ OFDM is used in many broadband technologies such as wimax-16d/16e, WLAN-11a/11n/11ac.
★OFDM is referred as multicarrier modulation.
★ It uses multiple rf carrier signals at different frequencies which sends some of the bits on each of the assigned channels. This seems to be similar to FDM but in the case of OFDM, total subcarriers are divided into subchannels and these subchannels are mapped to one single data/traffic source.
★ SC-FDMA system usually will have low PAPR compare to OFDM system.
★ SC-FDMA system is less sensitive to frequency offset compare to OFDM system.
★ SC-FDMA is widely used in LTE subscriber terminals in the transmit path and its variant OFDMA is used in the eNodeB downlink(or receive path of LTE subscribers).
★ OFDM is used in many broadband technologies such as wimax-16d/16e, WLAN-11a/11n/11ac.
★OFDM is referred as multicarrier modulation.
★ It uses multiple rf carrier signals at different frequencies which sends some of the bits on each of the assigned channels. This seems to be similar to FDM but in the case of OFDM, total subcarriers are divided into subchannels and these subchannels are mapped to one single data/traffic source.
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