In this paper, we propose an online SNR estimation scheme for generalized fading channels. We derive the SNR estimate based on a statistical ratio of observables over a block of data, when the channel undergoes Nakagami fading. An online SNR estimator for AWGN channels has been derived recently by Summers and Wilson. Our SNR estimation scheme in this paper is for a general Nakagami fading chann...

it is well known that if the coefficient matrix in a linear system is large and sparse or sometimes not readily available, then iterative solvers may become the only choice. the block solvers are an attractive class of iterative solvers for solving linear systems with multiple right-hand sides. in general, the block solvers are more suitable for dense systems with preconditioner. in this paper,...

In this paper, we propose an online SNR estimation scheme for Nakagami-m fading channels with equal gain diversity combining. We derive the SNR estimates based on the statistical ratio of certain observables over a block of received data. An online SNR estimator for an AWGN channel has been derived by Summers and Wilson. Recently, we derived an SNR estimation scheme for Nakagami-m fading channe...

ABSTRACT In this paper, a modified normalized Min-Sum algorithm (MNMSA) is proposed for decoding irregular Low Density Parity Check Codes (LDPC) with non-uniform degree distribution. The proposed algorithm provides an efficient decoding scheme to enhance the error performance of an irregular LDPC code without increasing the hardware complexity. An efficient 6 bit quantization scheme is utilized...

in this paper, a block-based method in wavelet domain for sar image coding is presented based on the ezbc algorithm. to better preserve edges and textural structure in sar images, instead of using traditional dyadic wavelet transform, a packet wavelet is employed. to improve the efficiency of the ezbc algorithm for sar image coding, a modified version of this algorithm, is proposed. this modifi...

In this paper, GNSS interferometric reflectometry (GNSS-IR) is firstly proposed to estimate ground surface subsidence caused by underground coal mining. Ground on the main direction of a seam described using probability integral model (PIM) with unknown parameters. Based laws reflection in geometric optics, signal-to-noise (SNR) observation for tilt surface, which results from differential poin...

The turbo principle (iterative decoding between component decoders) is a general scheme, which we apply to joint source-channel decoding. As a realistic (e.g. speech parameter coding) example we discuss joint source-channel decoding for auto-correlated continuousamplitude source samples. At the transmitter the source samples are quantized and their indexes are appropriately mapped onto bitvecto...

Blind separation of instantaneous linear mixtures of digital signals is a basic problem in communications. When little or nothing can be assumed about the mixing matrix, signal separation may be achieved by exploiting structural properties of the transmitted signals, e.g., finite alphabet or coding constraints. We propose a monotonically convergent and computationally efficient iterative least ...

The turbo principle (iterative decoding between component decoders) is a general scheme, which we apply to joint source-channel decoding. As a realistic (e.g. speech parameter coding) example we discuss joint source-channel decoding for auto-correlated continuousamplitude source samples. At the transmitter the source samples are quantized and their indexes are appropriately mapped onto bitvecto...

A clean speech VQ codebook has been shown to be effective in providing intraframe constraints and hence better convergence of the iterative Wiener filtering scheme for single channel speech enhancement. Here we present an extension of the single channel CCIWF scheme to binaural speech input by incorporating a speech distortion weighted multi-channel Wiener filter. The new algorithm shows consid...