An ICI Reduction Scheme for OFDM Systems with Phase Noise over Fading Channels
Artikel i vetenskaplig tidskrift, 2008
Orthogonal Frequency Division Multiplexing has
become a key element of todays wireless communication systems.
However, its sensitivity to oscillator phase noise is responsible
for common phase error (CPE) and inter-carrier interference
(ICI) which greatly degrades the overall system performance.
In this contribution, we address the problem of reducing the
effects of phase noise in an OFDM system operating over a
frequency selective fading channel. We propose a method for
jointly estimating the channel and CPE in a first step and
removing ICI in a second step, using a power series expansion of
the phase noise process. The algorithm is simulated on both coded
and uncoded systems with phase noise over a fading channel.