A time domain pilot's phase compensation based phase error correction method against severe doppler spread for SOFDM

A time domain pilot's phase compensation based phase error correction method was schemed and proposed, for dealing with the severe doppler spread to SOFDM symbols in satellite mobile communications with high-speed environments. First, phases of the time domain pilots were compensated in terms of certain rule and regulation. Afterwards, phase errors of the SOFDM symbols were estimated and corrected via applying the piecewise linearity interpolation to the adjusted phases of the pilots. According to the theoretical analysis, it only wastes 0.049 percent of system resource, and considering of such lower computational complexity, it can be simply carried out. Besides, the experimental results have also proved that it is able to correct the phase errors caused by severe doppler spread on a peak value of 1000 Hz under the U-type distribution, with a high-speed environment of 500 km/h as well as a low CIR of nearly 0 dB. As a result, the system BER is depressed to 1e-4 as an improved performance, which is about 100 times remarkably better than that of other ordinary systems.