@inproceedings{oai:niigata-u.repo.nii.ac.jp:00030944, author = {Endo, Natsumi and Yamada, Hiroyoshi and Yamaguchi, Yoshio}, book = {International Symposium on Antennas and Propagation, International Symposium on Antennas and Propagation}, issue = {3A1b-3}, month = {Nov}, note = {Direction of arrival estimation in coherent multipath environment by using the superresolution technique often requires decorrelation techniques. Spatial smoothing preprocessings are the most popular scheme as the techniques. In mobile environment, position change of the target/transmitter often brings us decorrelation effect. Multiple transmitting signals by an antenna array like a MIMO transmitter also realize the same effect. These effects can be categorized as a spatial smoothing preprocessing in transmitter. In this report, we analyze the spatial smoothing effect by transmitter in multipath environments. Theoretical and simulation results show that the transmitting-SSP has a good feature in comparison with the conventional (receiving) SSP. Furthermore, when we apply the transmitting-SSP and the receiving-SSP, we can obtain further decorrelation performance.}, pages = {1--6}, publisher = {The Institute of Electronics, Information and Communication Engineers}, title = {DOA Estimation of Coherent Waves by Using Spatial Smoothing Preprocessings in Transmitter}, volume = {2006}, year = {2006} }