An improved LMMSE algorithm for SC-FDMA

The channel estimation algorithm which has excellent performance is necessary for Single Carrier Frequency Division Multiple Access (SC-FDMA) system. The traditional Least Square (LS) algorithm and Linear Minimum Mean-Square (LMMSE) algorithm exist many problems. The problem of the LMMSE algorithm which is too complex is found to be applied effectively by researching LMMSE algorithm. The traditional LMMSE algorithm can be improved with the help of Jacobi iterative algorithm for solving linear equations. Meantime, theoretical analysis and simulation results indicate that: The improved LMMSE algorithm has more superior performance at low SNR, it not only can reduce the computational complexity, but also has more precise estimation result.