Joint iterative parameter estimation from the Cramér-Rao lower bound for an OFDM system

Orthogonal frequency division multiplexing (OFDM) has become a popular wireless data transmission technique and has been adopted into several standards like IEEE 802.11 (WiFi) and IEEE 802.16 (WiMAX). Some of the unknown parameters related to a typical OFDM system include sampling frequency offset, RF oscillator frequency offset, phase noise and the channel coefficients. Inaccurate estimation of these parameters results in a system degradation and poses a severe impairment to high speed communication. In this paper we propose a joint iterative parameter estimation technique for a single-input single-output (SISO) OFDM system which is derived from the generalized framework of the Cramer-Rao lower bound (CRLB).