oversampling with noise shaping

... Significant Bit Noise- Shaping DEM Noise Shaping DWA Noise Shaping Dithered Tree Structure Noise- Shaping Randomization Noise Shaping PDWA Noise Shaping Tree Structure Noise Transfer Function Oversampling ... 54 4.2.1 NS-RAND 55 4.2.2 ΔΣM with Noise Shaping DWA 58 4.2.3 ΔΣM with Noise Shaping PDWA 65 4.2.4 ΔΣM with Noise Shaping Tree-structure DEM 68 4.2.5 Summary ... the noise floor of ΔΣM with IDWA is 5dB lower than the one with PDWA Figure 29 ΔΣM’s output PSD with IDWA with m equal to 34 Figure 30 SNDR of the ΔΣM with IDWA Figure 31 SFDR of the ΔΣM with...

Ngày tải lên: 12/09/2015, 08:20

... (z) e[n] Figure 4: Noise shaping quantizer, followed by filtering Table 1: Gain in dB in in-band noise power comparing pth-order classical noise shaping with pth-order noise shaping using projections ... correspond to direct coefficient quantization, sequential noise shaping, and tree noise shaping, respectively Using (16) it is easy to show that both noise shaping methods have lower cost than direct coefficient ... first-order noise shaping quantizer case for all other frame expansions [1–7, 10] Noise shaping is one of the possible strategies to reduce the error magnitude In order to generalize noise shaping to...

Ngày tải lên: 22/06/2014, 23:20

... Design with Low Noise Oscillators Jeremy Everard Copyright © 2001 John Wiley & Sons Ltd ISBNs: 0-471-49793-2 (Hardback); 0-470-84175-3 (Electronic) FUNDAMENTALS OF RF CIRCUIT DESIGN with Low Noise ... by 20dB The theory in this chapter accurately describes the noise performance of this oscillator, within the thermal noise regime, to within ½ to 1dB of the predicted minimum A brief introduction ... Bibliography Low Noise Oscillators 177 179 4.1 Introduction 179 4.2 Oscillator Noise Theories 180 4.3 Equivalent Circuit Model 181 4.4 The Effect of the Load 191 4.5 Optimisation for Minimum Phase Noise...

Ngày tải lên: 08/04/2013, 10:50

... random classification noise is as good as for 0-1 loss, their tolerance to annotation noise is worse For example, the perceptron family of algorithms handle random classification noise well (Cohen, ... to theorem 1, for a 10K dataset with 15% hard case rate, a hard case bias of about 1% cannot be ruled out with 95% confidence Theorem suggests that annotation noise as defined here is qualitatively ... vulnerable to noise, as even a little noise could make the sample inseparable In this case the algorithm would cycle indefinitely never meeting termination conditions, wt would obtain values within a...

Ngày tải lên: 30/03/2014, 23:20

... removed while performing a noise reduction process Table PESQ scores with background noise reduction Algorithm Input STP STP and LTP LTP with Eq (5) LTP with Eq (13) LTP with Eq (14) Female 2.57 ... PESQ scores without background noise reduction Algorithm Input STP 5000 STP and LTP LTP with Eq (5) −5000 1.216 1.218 1.22 1.222 1.224 1.226 1.228 1.23 1.232 1.234 LTP with Eq (13) LTP with Eq (14) ... speech component without being affected by transient noise To solve the first problem on having transient noise component within a pitch search interval, we need to skip the transient noise region...

Ngày tải lên: 20/06/2014, 21:20

... with the noise level That is, the spurious spikes in the sequence basically stems from the noise signal, rather than from the speech signal 4.1 Basic idea Since the spikes introduced by the noise ... evaluation of noise- robust frontends [14] Eight types of additive noises are artificially added to clean speech data with SNR levels ranging from 20 to -5 dB The data may be further convolved with two ... EMD is with Set C (66.475.3%) We note that Set C contains arguably the most mismatched data because that convolution noises are applied to the utterances in addition to additive noises With only...

Ngày tải lên: 20/06/2014, 22:20

... noise signal consisting of recorded ventilation noise All signals were sampled with 16-kHz sampling frequency Evaluation was performed with different SNRs, which was achieved by varying the noise ... the noise consists of noise recorded in a moving car, in b the noise comes from a computer fan, in c the noise comes from a ventilation system and in d the noise is babble noise from approximately ... rate of the noise level The proposed method One problem with the SBA as described in the previous section is the noise- level estimation in (5) During intense continuous speech, the noise- level...

Ngày tải lên: 20/06/2014, 22:20

... and compare its performance with the other methods Followed by PEM based on the improved SDM to reconstruct the estimation signal, the improved noncoherent reception noise radar system based on ... reconstruction error is more than that of the sequence with length at SNR = 20 dB Thus, we only need to compute the reconstruction error of the sequence with the length 1-8 After computation and comparing, ... condition estimation accuracy Improved noncoherent reception noise radar scheme In this section, an improved noncoherent reception noise radar scheme is given, and its better range resolution...

Ngày tải lên: 21/06/2014, 03:20

... y and Φs [17–26] The error bound is created based on the noise characteristic such as bounded noise, Gaussian noise, finite variance noise, etc The authors in [17] show that it is possible to ... hence, the noise was the same and the noise went directly to the result Conclusions This article proposed the robust CS reconstruction algorithm for image with the presence of Gaussian noise The ... the y’s components, its total noise is different Consequently, the reconstruction on each yi gives the result having different noise corrupted to each pixel The noise in each pixel can be reduced...

Ngày tải lên: 21/06/2014, 17:20

... y and Φs [17–26] The error bound is created based on the noise characteristic such as bounded noise, Gaussian noise, finite variance noise, etc The authors in [17] show that it is possible to ... hence, the noise was the same and the noise went directly to the result Conclusions This article proposed the robust CS reconstruction algorithm for image with the presence of Gaussian noise The ... the y’s components, its total noise is different Consequently, the reconstruction on each yi gives the result having different noise corrupted to each pixel The noise in each pixel can be reduced...

Ngày tải lên: 21/06/2014, 19:20

... Rxx = R y y − Rvv (5) with Rvv = E{vvH } The noise correlation matrix Rvv can be (re-)estimated during noise- only periods and R y y can be (re-)estimated during speech-and -noise periods, requiring ... interfering with speaker C All speech signals are sentences from the HINT (Hearing in Noise Test) database [22] The upper left loudspeaker produces multi-talker babble noise (Auditec) with a power ... reference node In addition to the localized noise sources, all microphone signals have an uncorrelated noise component which consist of white noise with power that is 10% of the power of the desired...

Ngày tải lên: 21/06/2014, 20:20

... target signal, signal (b ) predominantly noise The adaptive finite impulse response filter W with N coefficients w0 to wN −1 then further reduces the remaining noise in signal (b) to form the output ... control algorithm in a simulated situation using a white noise source in an anechoic environment While noise suppression exceeds 40 dB after second without leakage control, in this example it is limited ... 0.6 0.8 1.2 Time (s) 1.4 1.6 1.8 Without leakage control With leakage control Figure 8: Effect of leakage control in a simulated anechoic environment The maximum noise reduction is limited to approximately...

Ngày tải lên: 21/06/2014, 22:20

... 10 Noise reduction (dB) −10 −20 −30 −40 −50 −60 −70 1000 2000 3000 Frequency (Hz) Reverberant room: Noise ipsilateral Noise back Noise contralateral 4000 5000 Anechoic room: Noise ipsilateral Noise ... et al 4.12 m Head with Noise contralateral microphones Target signal source Noise back Noise ipsilateral SNR improvement (dB) 2.92 m 2.83 m Reverberant room 10 Fixed 50 ms Noise source: Ipsilateral ... Target signal 10 Sound proof chamber Noise ipsilateral Cochlear implant user with Tempo+ speech processor Kemar with BTE unit SRT (dB) Noise contralateral −5 Noise back Real-time prototype beamformer...

Ngày tải lên: 22/06/2014, 01:20

... function In practice, the true noise variance is unknown Thus, the true noise variance is replaced by a so-called presumed noise variance Firstly, the presumed noise variance is initialized to ... hk,i and the noise component nk,i , that is, ˇ hk,i = hk,i + nk,i , (1) where the noise term nk,i and the channel coefficient hk,i are statistically independent The variance of the noise component ... to be a possible maximum value of the true noise variance.1 Then, the presumed noise variance will be gradually reduced till it approaches the true noise variance This concept will be described...

Ngày tải lên: 22/06/2014, 22:20

... the corresponding noise covariance matrices are obtained The BP algorithm is used to estimate the channel vector in the presence of a correlated noise with the so-obtained noise covariance matrices ... correlated noise with the so-obtained noise covariance matrices Our analytical results in Section 4.2 are validated by observing that the worst and the best MSE performances are obtained when the noise ... of the noise covariance matrix are fixed, the noise covariance matrix eigenvectors corresponding to the extremal values of the MSEs have been obtained Over all noise covariance matrices with identical...

Ngày tải lên: 22/06/2014, 23:20

... detection rate against white noise, (b) detection rate against colored noise (a = 0.75), (c) detection rate against colored noise (a = 0.9), and (d) detection rate against colored noise (a = 0.95) A more ... colored noise, and it has a better behavior than the GDE criterion against white noise and with respect to the amplitude dynamic range It is still better than this one, even against colored noise, ... superimposed sinusoids with the same magnitude: (a) detection rate against white noise, (b) estimate mean, (c) estimate variance, and (d) detection rate against colored noise (a = 0.75) the number...

Ngày tải lên: 23/06/2014, 01:20

... proposed NEF provides a substantial improvement compared with the simulated filters, especially at the high noise densities Impulsive noise removal and detail preservation are best achieved by ... corrupted pixels within the corrupted image, as explained in Sections 2.1 and 2.2 (3) Start the iterative computation process of NEF and perform the following steps for each corrupted pixel within the ... the number of uncorrupted pixels that exist within the current window, W Perform the following steps if the number of the uncorrupted pixels that exist within the current W is else than zero (i)...

Ngày tải lên: 23/06/2014, 01:20

... but its small peak is obscured by 1/ f DNA background noise (The work presented in [15, 16, 17] observes the presence of 1/ f background noise in DNA sequences.) The DFT method for the identification ... can be used to suppress a significant portion of this noise (see Figure 3) However, the relative height of the peak in yT+G (n) associated with the initial coding region is almost unchanged Our ... paper cannot be used to increase the relative height of the peaks in yT+G (n) associated with coding regions without also increasing the energy in the noncoding regions We have attempted to optimize...

Ngày tải lên: 23/06/2014, 01:20

... voltage gain increases with current and is therefore equal to the ratio of load impedance to re Note also that the input impedance increases with current gain and decreases with increasing current ... junction is replaced with a forward biased diode The emitter current is set by the base emitter junction voltage The base collector junction current source is effectively in parallel with a reverse ... can be gained by starting with the simplest T model as it most closely resembles the actual device as shown in Figure 1.1 Starting from a basic NPN transistor structure with a narrow base region,...

Ngày tải lên: 24/08/2014, 17:20

... over additive noise and phase noises [36] It is suggested that the optimal memory length of DA ML can be calculated provided that the statistics of the additive noise and phase noise are available ... setup of a single-polarization coherent receiver 30 2.13 The PSD of different noises (LO-ASE beat noise and shot noise) as a function of LO power in a coherent receiver at Ps =10 dBm 33 ... (p) in a 40 Gbit/s M-PSK system with 100 KHz linewidth of each ECL (l =5) 72 3.16 The difference between the STD of phase error with and without a matched filtering at...

Ngày tải lên: 10/09/2015, 15:47