MIMO FIR channel estimation: a first-order statistical method

Mobile wireless links exhibit frequency selective fading , thus a receiver needs to perform channel estimation and equalization. In this paper, we propose a superimposed periodic pilot scheme for channel estimation of a multi-input and multi-output (MIMO) system with finite-impulse response (FIR). A simple first-order statistics is used, and any FIR channel can be estimated provided both transmitted signals and additional noises are stationary with known means while regardless of any assumption on the color or distribution. There is no loss of information rate except for a controllable increase in transmission power. We derive the variance expression of this linear channel estimator. Numerical simulations demonstrate the effectiveness of this proposed method.