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In this paper the effect of channel estimation errors in single carrier systems using frequency domain widely linear iterative equalization is investigated. It was found out that when compared to their strictly linear versions their error performance is more robust with respect to these errors. They do not have the high error floor present in the error performance of strictly linear systems that do...
In this paper we present a study on the PAPR of SC-FDE systems using widely linear Tomlinson-Harashima precoding. It was found that these systems have lower PAPR when compared to their strictly linear versions; also, this PAPR can be further reduced without a severe impact in the error performance by shortening the length of the precoding filter with respect to the channel impulse response length.
In this paper, we propose a new method to derive the coded performance of precoded multicarrier systems using linear MMSE equalization. As an approximation for the SINR of a precoded multicarrier system employing linear MMSE equalization, the lognormal distribution with the smallest Kullback-Leibler distance to the observed SINR distribution is used. With this approximation, an expression for the...
When the transmitter does not have channel state information (CSI), linear precoding can be used in multicarrier systems in order to minimize the degradation of the overall bit error rate (BER) caused by deep fades appearing on subchannels. Within the multicarrier systems family, filterbank multicarrier (FBMC) systems were proposed to overcome the poor frequency localization together with the bandwidth/energy...
To calculate the unconditional bit error probability directly, the Signal to Interference-plus-Noise Ratio (SINR) distribution of a communications system must be known. However, for precoded systems employing Minimum Mean Square Error (MMSE) equalization, a suitable distribution has not been found yet. In this paper, we propose, as an approximation for the SINR of a precoded multicarrier system employing...
A filter bank multicarrier (FBMC) system having a high level of compatibility with the IEEE P1901 OFDM scheme is proposed. In order to reach the level of robustness, selectivity and performance required by the broadband power line, the approach is based on near perfect reconstruction (NPR) filters combined with OQAM modulation. A key feature of the approach is the fractionally-spaced sub-channel equalizer,...
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