The OFDM System Based on the Fractional Fourier Transform
ICICIC '06 Proceedings of the First International Conference on Innovative Computing, Information and Control - Volume 3
Short-time fractional fourier transform and its applications
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
MIMO OFDM Systems Based on the Optimal Fractional Fourier Transform
Wireless Personal Communications: An International Journal
Discrete Fractional Fourier Transform Based on New Nearly Tridiagonal Commuting Matrices
IEEE Transactions on Signal Processing
Discrete fractional Fourier transform based on orthogonalprojections
IEEE Transactions on Signal Processing
Closed-form discrete fractional and affine Fourier transforms
IEEE Transactions on Signal Processing
Unified fractional Fourier transform and sampling theorem
IEEE Transactions on Signal Processing
Scheduling schemes for multimedia service in wireless OFDM systems
IEEE Wireless Communications
WiMAX fractional frequency reuse for rural environments
IEEE Wireless Communications
WiMAX femtocells: a perspective on network architecture, capacity, and coverage
IEEE Communications Magazine
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In conventional OFDMA cellular systems, mobile stations (MSs) suffer from large ICI in fully loaded cellular environments with full cell frequency reuse, especially at the cell-edge. The fundamental cause is that the signals from serving Base Station (BS) and interference BSs, are modulated by same exponential bases, at same subcarrier. In this paper, a generalized low-complexity fractional Fourier transform (FrFT) based biorthogonal frequency division multiple access (B-OFDMA) cellular system with multiple angle division reuse scheme (MADR) scheme for inter-cell interference (ICI) cancellation is proposed. FrFT angle is regarded as a kind of time-frequency combination resource (TFCR), and it can be optimally allocated to each BS of the cellular system, based on simplified minimal base correlation coefficient (MBCC) criteria, which confirms the inner-cell mutual orthogonality between modulating bases at different subcarriers, and inter-cell mutual approximate orthogonality between modulating bases at same subcarriers. Therefore, at the receiver, ICI can be dramatically suppressed by MMSE equalization and correlative detection in respective optimal FrFT domain. Extensive system simulations are conducted for various practical scenarios to demonstrate the superior performance of the proposed FrFT MADR scheme in bit error rate (BER) and system throughput, especially for cell-edge MSs, compared with conventional OFDMA cellular with different ICI cancellation schemes and scheduling schemes.