An improved LS channel estimation algorithm of SC-FDMA

In the LTE uplink, Single Carrier Frequency Division Multiple Access (SC-FDMA) is adopted as its multiple access scheme. The Channel Estimation (CE) is one of the key technologies in mobile communication system. According to the latest LTE criterion, the pilot-aided CE algorithms of SC-FDMA are researched in this paper. Our research mainly discusses Least-Square (LS), the traditional LS based on Discrete Fourier transform (DFT) and the improved LS based on DFT. Finally, theoretical analysis and simulation result show that: The improved LS based on DFT has more superior estimation performance than the traditional LS based on DFT while it increases the computational complexity in the low SNR.