Báo cáo hóa học: " Research Article Distortion-Free 1-Bit PWM Coding for Digital Audio Signals" pdf

... Advances in Signal Pr ocessing Volume 2011, Article ID 651960, 8 pages doi:10.1155/2011/651960 Research Ar ticle Raised Cosine Interpolator Filter for Digital Magnetic Recording Channel Hui-Feng ... cosine pulse for digital magnetic recording channel is investigated. Simulation r esults indicate that the raised cosine interpolator achieve the best performance in both MSE and error...

Ngày tải lên: 21/06/2014, 05:20

... performance. We note that the SVMs trained with 256- dimensional raw AE data had quite poor performance, where the AUC was 0.39 and 0.31 for datasets SR1 and SR2. We also examined the performance ... discrimination performance when they are combined with other features. For dataset SR1, the best performance was obtained with those features computed with WP method only. We note that the be...

Ngày tải lên: 21/06/2014, 08:20

... transmission strategies, namely, amplify-forward (AF), hybrid decode amplify forward (HLC), hybrid decode amplify forward (HMC), decode forward (DF), and partial decode forward (PDF) , are proposed. Their designs ... C 2  ( H B ) T  N B pdf  −1 H B K R  , (59) R B ≤ C 2   H B pdf  T  N A pdf  −1 H B pdf K B  , (60) where N i pdf   ζ 2 1 h i1 h T i1 + ζ 2 2 h i2 h T i2 +...

Ngày tải lên: 21/06/2014, 17:20

... generally used for research which is a vehicle for further development, for verification of algorithms, or ideas under real-world or real-time conditions. This results in the requirement for scalability, ... system performance. The DBF measurement result is presented in this section. A single-tone test is performed for the evaluation of the UKM testbed performance. An Agilent 54622...

Ngày tải lên: 21/06/2014, 22:20

... PERFORMANCE EVALUATION Radio network performance can be measured with multiple performance indicators. These can be used to measure the coverage, interference, and system performance. The performance ... was evaluated with the optimum antenna height of 31.8 m for the triangular, 40.2 m for the square, 31.4 m for the hexagonal, and 32.1 m for the clover- leaf layout. Different layouts p...

Ngày tải lên: 21/06/2014, 23:20

... general form of OFDM signal format, called gen- eralized multicarrier (GMC) [5–7], is formed by performing a matrix transformation on the vector a of M data symbols before applying (1): A = Ma,(2) where ... spectrum and amplitude samples of the pilot waveform are uniform [26, 27]. A length-L Chu sequence can be obtained by c n =  e jπqn 2 /L for L even, e jπqn(n+1)/L for L odd, (13) wher...

Ngày tải lên: 22/06/2014, 19:20

... require correct decoding of Phase 1 packets. This allows relaying of soft information to the destination, thus increasing coding gains while retaining diversity properties. For any reencoding function ... same encoding function used by the VAA cre- ated by MSC. In particular, this establishes that for a net- work with N users, the diversity orders are (i) 2 for repe- tition coding, (...

Ngày tải lên: 22/06/2014, 19:20

... source coding dis- tortion for layer i at the encoder. Since the wavelet trans- form is unitary, the energy is supposed to be unaltered af- ter wavelet transform. Therefore the source coding ... overall performance. To find the optimum parameters, the performance of DBTC needs to be evaluated for each set of permutation pa- rameters. Unfortunately, at low error rates the performance of...

Ngày tải lên: 22/06/2014, 19:20

... Journal on Advances in Signal Processing Volume 2007, Article ID 24106, 11 pages doi:10.1155/2007/24106 Research Article Compression at the Source for Digital Camcorders Nir Maor, 1 Arie Feuer, 1 and ... 26) A p,q = ⎧ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎨ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎩ e j(2π/(2L+1))qp , for p = 1, 2, , L, e j(2π/(2L+1))q(L−p) , for p = L +1,2, ,2L, q = 1, 2, ,2L (A. 27) B p,q = ⎧ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎨ ⎪ ⎪ ⎪ ⎪...

Ngày tải lên: 22/06/2014, 19:20

... =∅; (4) for every n ∈ U P used n =  k∈S p n k ; if P used n = P n  U =  U + {n}; for every k ∈ S if p n k > 0,  S =  S + {k}; end for end if end for (5) U = U −  U; S = S −  S; (6) for ... on Advances in Signal Processing Volume 2007, Article ID 59068, 11 pages doi:10.1155/2007/59068 Research Article Selective Iterative Waterfilling for Digital Subscriber Lines Ya...

Ngày tải lên: 22/06/2014, 20:20