Time frequency scale transforms

... an open-loop MIMO OFDM-CDMA scheme using space-timefrequency spreading (STFS), in the presence of frequency-selective Rayleigh-fading channel The BER and BLER performance of the OFDM-CDMA system ... scheduling In addition, it offers better diversity/multiplexing trade-off The performance of MIMO OFDM–CDMA scheme using STFdomain spreading is investigated with zero-forcing...

Ngày tải lên: 18/06/2014, 22:20

... N c , the OFDM-CDMA 60 Proposed OFDM-CDMA 2D OFDM-CDMA Number of Users 50 40 30 20 10 0 10 12 14 16 SNR dB Figure 10 System throughput comparison for OFDM-CDMA system with 4Tx, 4Rx of the proposed ... scheduling In addition, it offers better diversity/multiplexing trade-off The performance of MIMO OFDM-CDMA scheme using STF-domain spreading is investigated with zero-fo...

Ngày tải lên: 20/06/2014, 21:20

... “Parametric time-frequency analysis and its applications in music classification,” by Y Shen et al., deals with analysis and classification of music signals Music signals are decomposed into atoms using ... on time-frequency analysis and Hermite projection method” by S Stankovi´ et al to provide a method c for temporal analysis and reconstruction of digital video seque...

Ngày tải lên: 21/06/2014, 05:20

... classification accuracy rate Since each sample is excluded from the training set in turn, the independence between the test set and the training set is maintained In a database with N examples, ... found in the appendix 3.2 Classification Scheme 3.2.1 Linear Discriminant Analysis (LDA) In this work, pattern classification is carried out using the linear discriminant analysis (LDA)...

Ngày tải lên: 21/06/2014, 08:20

... (16 1, 12 9) 1. 1 Block index 26 7 28 3 29 9 315 3 31 28 4 300 316 3 32 (16 1, 16 8) 0.9 0.8 16 × authentication block 0.7 0.6 0.5 0.4 0.3 50 10 0 15 0 20 0 25 0 300 350 400 450 500 Block index (19 2, 12 9) 26 8 (19 2, ... 10 −4 32. 89 98% 44. 41 0.0 014 28 .69 95% 41. 53 0. 010 1 19 .95 90% 38.83 0. 026 7 15 .74 80% 35.94 0.06 41 11. 93 70% 34. 41 0.0956 10 .19 60%...

Ngày tải lên: 21/06/2014, 08:20

... Multisource Binaural Sound Synthesis It is widely known that binaural sound synthesis is a technique capable of reproducing a virtual sound image of a recorded sound signal at an apparent position ... proposed approach for binaural sound synthesis (1) The signals obtained by the microphones of the array enter the analysis stage (2) In the analysis stage, the fo...

Ngày tải lên: 21/06/2014, 08:20

... the autocorrelation matrix RSMD is calculated according to (21) The eigenvalues and eigenvectors are obtained by using the eigenvalues decomposition of RSMD The eigenvectors are equal to the ... different regions Consequently, it may lead to a variable amount of watermark within different regions Thus, in order to overcome these difficulties, the eigenvalue decomposition metho...

Ngày tải lên: 21/06/2014, 08:20

... values of these validity measures for fuzzy clustering the GustafsonKessel clustering has the very best results The GustafsonKessel fuzzy clustering algorithm forces each cluster to adapt the ... clusters, and fuzzy clustering is often better suited for the data In this way, data on the boundaries between several clusters are not forced to belong to one of the clusters 2.1...

Ngày tải lên: 21/06/2014, 08:20

... its performance at the intersections Yet another test case is adopted from Boashash [15] to compare the TFDs’ performance at the middle of the signal duration interval by the Boashash’s performance ... resolution and concentrated time-frequency distributions: a review,” EURASIP Journal on Advances in Signal Processing, vol 2009, Article ID 673539, 43 pages, 2009 [3] B Boashash, Tim...

Ngày tải lên: 21/06/2014, 08:20

... illustration of stationary and nonstationary blocks in a sequence of frames (box 1-stationary block, box 2-nonstationary block) Video Analysis and Reconstruction Using Time-Frequency Representations and ... 120 60 120 Time (frames) M −1 xM (t) = 60 q > 0, 3.2 Hermite Projection -Based Temporal Reconstruction of Nonstationary Pixels within the Sequence of Video Frames...

Ngày tải lên: 21/06/2014, 08:20

... [35], independent component analysis (ICA) [1, 36], and principal component analysis (PCA) [37–40] to extract time-frequency features for classification purposes or for reducing the time-frequency ... new data reduction method based on applying matching pursuit decomposition to the time-frequency domain principal components to further reduce the information from t...

Ngày tải lên: 21/06/2014, 16:20

... signal 0.5 (b) Octave distribution signal 1 Time 0.5 Octaves 10 11 12 13 (h) Figure 9: Comparison of octave distributions Signals and 2: Rock-like signals, and Signals and 4: Classical-like signals ... stage-by-stage implementation and analysis of three important audio processing tasks, namely, (1) audio compression, (2) audio classification, and (3) securing audio co...

Ngày tải lên: 21/06/2014, 16:20

... √ scale invariance property is K/ t, where K ∈ R √ Proof In order to find h(t) such that h(at) = (1/ a)h(t), we use the scale transform which is defined as [1] Scale Covariant Computationally Efficient ... to be scale covariant, the crossspectrograms that constitute the TFD should each be scale covariant This is a sufficient but not necessary condition The cross-spectrograms wil...

Ngày tải lên: 21/06/2014, 22:20

... Continuous to Discrete Time- Frequency- Scale Transforms 19 2.1 Continuous Transforms 20 2.2 Semi-Discrete Transforms 24 2.3 Discrete Transforms: Frames ... wavelet which defines a continuous time- frequency- scale transform Vψ Then for any σ ∈ L1 (R) such that σ(γ) > 0, CHAPTER FROM CONTINUOUS TO DISCRETE TIME- FREQUENCY- SCALE TRANSFORMS 32 γ ∈ R, ∫ ∞ ∫ −∞ ... signal fu...

Ngày tải lên: 12/10/2015, 17:36