AOA and AOD Estimation for Rectangular Antenna Array in Non-selective and Slow Fading in MIMO Channels

In this paper the use of uniform rectangular antenna arrays for both transmitter (Tx)-and receiver (Rx)-antennas in multiple input multiple output (MIMO) channel model for code division multiple access (CDMA) frequency on-selective and slow fading channel. Subspace-based algorithm for the simultaneous estimation of angle of arrivals (AOAs) and angle of departures (AODs) from an estimated spatial signature at the transmitter and receiver antenna array. Finally, 2-D unitary ESPRIT-like shift invariance technique to separate and estimate the phase shifts due to the AOAs and AODs with automatic pairing of the two parameter sets. Simulation results are presented efficient estimator.