Joint Equalization and Power Loading for Spectrally Orthogonally-Precoded OFDM Systems
Date Issued
2010
Date
2010
Author(s)
Su, Wei-Hsin
Abstract
In this thesis, we combine Spectrally Orthogonally-Precoded OFDM System (SOP-OFDM) with power loading (PL) techniques in order to improve BER performance and provide very high spectral efficiency [1]. We propose the following two algorithms: 1. Joint equalization and block precoding in order to minimize mean square error of SOP-OFDM system 2. Block precoding design in order to minimize asymptotical average instantaneous bit error rate of SOP-OFDM system with MMSE equalizer. The BER performance of these two systems both outperforms the existing SOP-OFDM systems with power loading design by using Zero Forcing equalizer [1]. Eventually, on two-ray fading channels, we will compare average BER performance, mean square error performance, fractional out-of-band power characteristics and complexity of the spectral codes with different power loading algorithms.
Subjects
Spectral precoding
orthogonal frequency division multiplexing
(OFDM)
power loading
spectral efficiency
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