Joint DOA estimation and array calibration in the DS-CDMA systems in the multi-path environment using uniform linear array
Zhou Xi-lang · Systems engineering and electronics · 2007
An algorithm for DOA estimation of signals from multiple mobile users in the CDMA systems in multi-path environment is presented.The algorithm employs code-matched filter and models the inter-symbol interference(ISI) and multiple-access interference(MAI) exactly.The correlation matrices of the received signals after code-matched filtering are employed to estimate the variance of the additive white Gaussian noise,and a novel mathematical problem is created,then a new maximum Likelihood(ML) method based on the strong law of large number can be derived for DOA estimation and array calibration,finally computer simulation proved its effectiveness.