Index A Abelian group, 123 Absorption loss, 6 Acoustic channel, 2 Adaptive channel estimation, 192, 322 Additive white Gaussian noise channel, 66, 91, 117, 239, 251, 287, 400 Adjacent-channel interference, 286 Adjoint, 33 Affine Fourier transform, 317 Alamouti code, 318 Algebraic extension, 128 Algebraic integer, 129 Algebraic lattice, 127, 132 Algebraic number theory, 117, 127 Algebraic rotation, 137 Aliasing error, 52, 54 Ambiguity function, 34, 55, 77, 316 Ambiguity in noncoherent equalization, 262 Amount of training, 223 Analog-to-digital conversion, 3 Angle of arrival, 4, 6, 13 Angle of departure, 6, 13 B Back-to-back calibration, 52 Bahl, Cocke, Jelinek, Raviv, 248, 342, 350, 352 Balian-Low theorem, 76, 239 Banded channel matrix, 155, 248, 299 Bank of matched filters, 390 Baseband domain, 4 Basis expansion model, 41, 47, 71, 156, 158, 213, 261, 302, 319, 343 Bayesian EM algorithm, 268, 272 Bayes rule, 246 BCJR decoder, 248, 342, 350, 352 Beamforming, 22, 94 BEM coefficient, 192 BEM for multiple OFDM symbols, 183 BEM order, 159 BEM statistics, 47­48 BER, 204, 286, 293, 391 Best-first tree search algorithm, 252 Best linear unbiased estimator, 166, 168, 322 Bhattacharyya bound, 204 Binary phase-shift keying, 380, 388 Biorthogonality condition, 53