Rotated Walsh-Hadamard spreading with robust channel estimation for a coded MC-CDMA system
EURASIP Journal on Wireless Communications and Networking - Special issue on innovative signal transmission and detection techniques for next generation cellular CDMA systems
Signal space diversity techniques with fast decoding based on MDS codes
IEEE Transactions on Communications
Stochastic signaling in the presence of channel state information uncertainty
Digital Signal Processing
A Novel Nonlinear Constellation Precoding for OFDM Systems with Subcarrier Grouping
Wireless Personal Communications: An International Journal
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We establish a simple relation between high-diversity multidimensional rotations obtained from totally complex cyclotomic fields and the discrete Fourier transform. The diversity distribution of an Hadamard-like random rotation is derived analytically. It is shown that a random multidimensional rotation exhibits an excellent diversity distribution and can be combined to quadrature amplitude modulation (QAM) constellations to combat channel fading. We also describe a mean-square error (MSE) universal lattice decoder suitable for large dimensions up to 1024. The MSE criterion treats the lattice structure as intersymbol interference. The universal decoder is applied to both Gaussian and Rayleigh fading channels to decode dense lattice sphere packings and rotated cubic constellations, respectively