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References in periodicals archive ?
Encoder is assembled at each relay node to encode separately the corrupted analog signals, and subsequently the encoded digital signals are transmitted to the destination D through the channel with additive white Gaussian noise.
The Rayleigh fading channel coefficient [g.sub.i,n] is the (i, n)th entry of the matrix G for i [less than or equal to] R; 1 [less than or equal to] n, [N.sub.d] is the number of receive antennas at the destination [v.sub.n](t) is the additive white Gaussian noise with variance [N.sub.0].
The test image is 256[x.sub.2]56 pixels gray levels image that was distorted by convolution with a Gaussian PSF and additive white Gaussian noise.
If [DELTA][a.sub.n] = [[[DELTA]u(n), [DELTA]u(n - 1), ..., [DELTA]u(n - N + 1)].sup.T] [member of] [R.sup.N], denote the perturbations in input vector [a.sub.n], where [DELTA]u(n) is an additive white Gaussian noise (uncorrelated from the output noise) of zero mean and variance [[sigma].sup.2.sub.[DELTA]u], then noisy input vector is
The maximum-likelihood (ML) [4], and nonlinear instantaneous least squares (NILS) [7] estimators can provide very high estimation accuracy, whose estimator variances achieve Cramer-Rao lower bound (CRLB) asymptotically under additive white Gaussian noise [8].
Each time you change something, such as the MAC details accessible from the Configure PSDU (physical layer service data unit) button in Figure 2 or the amount of additive white Gaussian noise (AWGN) added to the signal, you must rebuild the system.
But soft thresholding procedure is near optimal for the signals corrupted by additive white Gaussian noise, however, some considerations applying the thresholding method (hard or soft thresholding method) to speech signal since the speech signal in the unvoiced region contains relatively lots of high frequency components that can be eliminated during the thresholding process.
Additive white Gaussian noise with standard deviation equal to 5% of maximum signal magnitude is added to "Blocks" signal and Haar wavelet is used to construct a 4-level decomposition tree, as in Fig.
Results are simulated in both Rayleigh channel and additive white Gaussian noise (AWGN) channel.
The 15 contributions also discuss coding and detection methods for multitrack recording systems, the performance of turbo product codes, iterative decoding algorithms, error event characterization, trellis codes for partial response channels, additive white Gaussian noise, and threshold analysis using density evolution.
It introduces an integrated solution for creating test case connections of TS34.121, TS25.141, TS51.010, TS51.021 TIA/EIA and IS-95/97/98/2000, including multipath fading, additive white Gaussian noise (AWGN) generation and faded modulated interfering signals in a single tool.