Abstract:With the rapid development of logging while drilling (LWD) technology, the realtime transmission of multidimensional formation data is particularly important. Aiming at improving the low data rate, high cost, and nonreal time for traditional transmission approaches, this paper proposes a novel acoustic transmission scheme based on noncontinuous orthogonal frequency division multiplexing (NCOFDM). Firstly, the frequency response function of drill strings channel is simulated through transfer matrix method (TMM), and on this basis, a channel estimation method is proposed to obtain frequency response of each subchannel. Then, a received array with two accelerometers is utilized to receive the acoustic signals with phase shifting, and the surface strong noise interference of uplink transmission can be reduced through the correlation of the received signals. Finally, a set of test device of communication is designed to validate the transmission performance under the channel condition of experimental drill strings. Simulation and test results show that the designed transmission scheme has high data rate and high reliability.