Joint Frequency Offset and Channel Estimation for OFDM Systems Using Pilot Symbols and Virtual Carriers

The authors consider joint estimation of carrier frequency offset and Channel Impulse Response (CIR) for Orthogonal Frequency Division Multiplexing (OFDM) systems with pilot symbols and Virtual subCarriers (VCs). The authors derive the receive-signal correlation structure due to the pilots and VCs, give the evidence of joint multivariate Gaussian distribution of the received samples, and derive an approximate Maximum Likelihood (ML) frequency offset estimator. The authors also derive the asymptotic Mean-Square Error (MSE) and an approximate Cramer-Rao Bound (CRB) and establish the asymptotic unbiasedness.

Provided by: Institute of Electrical and Electronics Engineers Topic: Mobility Date Added: Dec 2009 Format: PDF

Download Now

Find By Topic