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Why lte ( 3.9g) use ofdma in dl, sc-fdma in the ul ?‎

لماذا تستخدم شبكة LTE تقنية OFDMA في الوصلة الهابطة بينما تستخدم SC-FDMA في الوصلة الصاعدة ؟‎

 

Answer added by  Adil Chughtai, Back Office Engineer, Huawei
10 years ago

In simple terms OFDMA requires more power for transmission whereas SC-FDMA requires lesser power.. and since higher power can't be processed using UE (mostly mobile ... See More

 

Answer added by  حنان عبدالحليم عبدالحكيم الديب, technical support specialist, TEDATA
10 years ago

LTE use ofdma in DL for more data rate and more application .Base station can increase the power and have awideband power amplifier .LTE in UL use S-CFDMA to overcome the ... See More

 

Answer added by  Yasir Ahmed, CEO and Founder, RAYmaps
10 years ago

It's to do with Peak to Average Power Ratio (PAPR). OFDMA has higher PAPR than SC-FDMA therefore it is used in the downlink (from base station to mobile station). Th ... See More

 

Answer added by  Jamshed Iqbal, IP Network Engineer, Nokia
10 years ago

4G technology uses OFDMA in DL because of the reason that data rate can be very high. OFDMA supports high data rate due to data transmission in parellel sub-carrier bands ... See More

 

Answer added by  sardar mardookhy, PMP certified Project manager, MCCI
9 years ago

It is because of PAPR , because of PAPR and limitation of handset for providing power the SC-FDMA is more suitable for uplink. BR//