A design of segmented data rates for recurrent channel estimation

In a conventional pilot-symbol assisted modulation design, the signals of a short period are composed of the pilot tones and an information symbol block. For improving the accuracy of the channel estimate, some recurrent methods use the detected information symbols as the additional pilots. Working on an orthogonal frequency division multiplexing system, we divide the information symbol block into several sub-blocks and assign them with different data rates. Then the recurrent channel estimations can exploit the potential strength of the new approach, and the averaged data rate can be increased with the minimum mean-square error channel estimator. The simulation results confirm the merit of the proposed approach.