نتایج جستجو برای: blind estimation

تعداد نتایج: 343621  

Journal: :Proceedings of the ISCIE International Symposium on Stochastic Systems Theory and its Applications 2004

2014
Gajanan R Patil Vishwanath K Kokate

A new approach to Semi-Blind Channel Estimation (SBCE) technique for Multiple Input Multiple Output (MIMO) wireless communication system is proposed. It combines the Least Square (LS) and Minimum Mean Square Error (MMSE) Training Based Channel Estimation (TBCE) scheme with whitening rotation based orthogonal pilot maximum likelihood (OPML) semi-blind channel estimation (SBCE) scheme. In the new...

2009
Hyuk Park

A new method, based on the normal shrink and modified version of Katssagelous and Lay, is proposed for multiscale blind image restoration. The method deals with the noise and blur in the images. It is shown that the normal shrink gives the highest S/N (signal to noise ratio) for image denoising process. The multiscale blind image restoration is divided in two sections. The first part of this pa...

Journal: :JIPS 2017
Gajanan R. Patil Vishwanath K. Kokate

A joint channel estimation and data detection technique for a multiple input multiple output (MIMO) wireless communication system is proposed. It combines the least square (LS) training based channel estimation (TBCE) scheme with sphere decoding. In this new approach, channel estimation is enhanced with the help of blind symbols, which are selected based on their correctness. The correctness is...

2009
Akio Miyazaki

In this paper, we address a sequence estimation problem formulated as a kind of blind deconvolution problem. We employ Bayesian estimation approach and treat this problem. As a solution to this problem, we present a sequence estimation method using EM (Expectation – Maximization) algorithm. The proposed method is applied to the watermark detection problem, which also becomes a blind deconvoluti...

2003
Lei Huang Lingfeng Liu

The future wireless communications systems should be able to offer wide variety of applications, which have vastly different quality of service (QoS) requirements. The time-variable QoS may require the support of variable bit rates on the wireless links to the individual users. Multi-rate DS/CDMA is a promising basis on which to support the variable bit rates on the individual wireless links. C...

2017
Akshay Rana Mamta Arora

The aim of this paper is to share novel paradigm of channel estimation for orthogonal frequency division multiplexing (OFDM) systems. OFDM is used to improve spectral efficiency and spatial diversity in wireless communications systems. This paper provides a review of channel estimation techniques (blind and pilot-aided) and its performance on data-aided channel. After comparison with known tech...

Journal: :Signal Processing 2009
Tao Liu Hanzhang Li

In this paper, estimation of carrier frequency offset (CFO) in orthogonal frequency division multiplexing (OFDM) systems with I/Q imbalance is studied. By exploiting the mirror spectrum induced by I/Q imbalance, we proposed a novel algorithm for blind CFO estimation without training sequences. Simulation results show that the proposed algorithm outperforms the existing one, which is well accept...

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