DS-CDMA synchronization with dual-antenna in unknown correlated noise
We consider the propagation delay estimation of a direct-sequence code-division multiple-access (DS-CDMA) system in unknown correlated noise. The new propagation delay estimation method proposed here is based on generalized correlation decomposition (GCD). First, the received signal with a dual-antenna through a flat-fading channel is modeled. Then, two GCD-based propagation delay estimators: dual-antenna singular value decomposition (SVD) and dual-antenna canonical correlation decomposition (CCD) estimators are presented and compared with common MUSIC estimator. Simulation results show that the proposed estimators, especially the dual-antenna CCD estimator, are robust against the near-far problem and outperform the common MUSIC estimator in unknown correlated noise.