Open AccessEstimation Techniques for MIMO-OFDM-A Review
Author(s) -
Varsha Yadav,
Prashant Garg
Publication year - 2021
Publication title -
international journal of advanced research in science, communication and technology
Language(s) - English
Resource type - Journals
ISSN - 2581-9429
DOI - 10.48175/ijarsct-2207
Subject(s) - telecommunications link , orthogonal frequency division multiple access , computer science , orthogonal frequency division multiplexing , frequency division multiple access , 3rd generation partnership project 2 , umts frequency bands , code division multiple access , mimo , throughput , computer network , electronic engineering , real time computing , telecommunications , engineering , wireless , channel (broadcasting)
In the context of Third-Generation Partnership Project Long-Term Evolution (3GPP LTE), the target data rates are 100 Mb/s in downlink and 50 Mb/s in uplink, and other system features include flexible bandwidths and moderate power consumption of mobile terminals. While the previous 3GPP generations, namely, 3G UMTS and 3.5G HSPA, rely on code-division multiple access (CDMA), LTE adopts orthogonal frequency-division multiple access (OFDMA)-based technologies for its uplink and downlink. Due to high peak-to-average power ratio (PAPR) of OFDMA signals, the single- carrier frequency division multiple access (SC-FDMA), also known as discrete Fourier transform (DFT)-spread OFDMA, has been selected for the uplink transmission in 3GPP LTE systems. SC-FDMA has similar throughput performance as OFDMA but with lower PAPR to increase power efficiency and is less sensitive to frequency synchronization errors, which makes it favorable for mobile terminals.