MIMO relay compressed channel estimation using optimized pilot placements
Abbas Akbarpour‐Kasgari, Mehrdad Ardebilipour · 2017
Relay communication channel estimation is one of the recent challenges in this field. One of the crucial point of the proposed channel estimation approach is the bandwidth efficiency. Compressed Sensing (CS) based channel estimation have been emerged as a bandwidth efficient approach. In this paper, we have designed a pilot placement for CS based channel estimation in MIMO-OFDM relays. The proposed approach uses stochastic search algorithm to find the pilot sequences for different transmit antennas which yields the optimal coherence value. Simulation results have shown the superiority of the proposed method to improve the channel estimation performance.