An iterative joint channel estimation and symbol detection algorithm applied in OFDM system with high data to pilot power ratio

For orthogonal frequency-division multiplexing (OFDM) systems with pilot-symbol-aided channel estimation, a straightforward way to overcome system throughput deterioration is by decreasing the power and reducing the number of pilots, which unfortunately, leads directly to the degradation of BER performance. For the purpose of improving the BER performance, an iterative joint channel estimation and symbol detection algorithm with low complexity and fast convergence is proposed. Both theoretical analysis and computer simulation show that this algorithm gives better BER performance and saves the overhead of OFDM systems.