MLE Maximum Likelihood Estimator IMP Iterative Multiple Parameter EM Estimate Maximize AP Alternate Projection MAP Maximum a posteriori ASPECT Adaptive Signal Parameter Estimation & Classification Technique MODE Method of DOA Estimate AAR Adaptive Angular Response TNA Thermal Noise Algorithm MVDR Minimum Variance Distortionless
Response MEM Maximum Entropy Method MUSIC Multiple Signal Classification NSP MUSIC Noise Space Projection MUSIC Root MUSIC Polynomial Rooting MUSIC Cyclic MUSIC Cyclostationary MUSIC WSF Weighted Subspace Fitting MNM Minimum Norm Method ESPRIT Estimation of Signal Parameters via Rotational Invariance TLS-ESPRIT Total Least Squares ESPRIT PRO-ESPRIT Procrustes ESPRIT DPT Discrete Polynomial Transform CM Constant Modulus
The output SINRs of them under the perfect (the correlation matrices are known) and imperfect (the correlation matrices are estimated by finite samples) situations are examined and compared with those of the narrowband minimum variance distortionless
response (MVDR) and broadband TDL beamformers.
A multicarrier wideband transmission technique like the highly promising Orthogonal Frequency Division Multiplexing (OFDM) should therefore be treated on narrowband signalling basis, since it would normally involve no transmission of wideband signals, but consist in dividing the data stream into several substreams transmitted over equally numbered narrowband sub-channels configured that narrow to ensure distortionless
Through establishing some connections between MVDR (minimum variance distortionless
response) beamformer  and MUSIC, some authors also find high resolution DOA estimation methods without estimating the source number [17-19].
15 cell proliferation by 50%; DEPT, distortionless
enhancement by polarization transfer; DMEM, Dulbecco's modified Eagle's medium; DMSO, dimethyl sulfoxide; ELISA, enzyme-linked immunosorbent assay; HBeAg, hepatitis B e antigen; HBsAg, hepatitis B surface antigen; HBV, hepatitis B virus; HMBC, [sup.
For the well-known Capon beamformer or minimum power distortionless
response (MPDR) beamformer, the adaptive weights are calculated by minimizing the beamformer's output power subject to the constraint that forces the array to make a constant response in the steering direction [1-3].
Many PAPR reduction techniques have been proposed in the literature, among them, partial transmit sequence (PTS) and selective mapping (SLM) are the most attractive approaches since they are distortionless
Abbreviations: DEPT, distortionless
enhancement by polarizationtransfer; COSY, correlation spectroscopy; bw, body weight; AST, alkaline phosphatase; ALT, alanine transaminase; AST, aspartate transaminase; T BIL, total bilirubin; TP, total protein; TG, triglycerides; HDL, high density lipoprotein; LDL, low density lipoprotein.
Among the techniques for adaptive array beamforming, the minimum variance distortionless
response (MVDR) technique  is the most popular one used for finding the required adaptive weights.