نتایج جستجو برای: channel estimation

تعداد نتایج: 476433  

2014
S. Sathiya Priya

Channel knowledge is the important information required for good UWB communications. So many methods are available for UWB channel estimation. However, it is critical to find the multi-path clustered model of UWB transmission. In this paper, we present a new Innovative method with very simple and less complex channel estimation technique. We derived channel estimation equation for the Time Hopp...

Journal: :IEICE Transactions 2005
Hyoung-Nam Kim Sung Ik Park Seung Won Kim

This paper presents analysis results on finite-impulse response (FIR) channel estimation used for the equalization in Advanced Television Systems Committee digital television receivers. While channel estimation results have been effectively used for the equalization, the conditions of sufficient order and high signal-to-noise ratio (SNR) were assumed in most cases. To compensate for these unrea...

Journal: :IEICE Transactions 2005
Shinsuke Takaoka Fumiyuki Adachi

In this letter, pilot-assisted adaptive prediction iterative channel estimation in frequency-domain is presented for the antenna diversity reception of orthogonal frequency division multiplexing (OFDM) signals. A frequency-domain adaptive prediction filtering is applied to iterative channel estimation for improving the tracking capability against frequency-domain variations in a severe frequenc...

2015
Eswar Kumar

This paper provide MMSE Channel estimation For MIMO-OFDM Using Spatial and Temporal Correlations. Generally there are a lot of methods for channel estimation of OFDM as well as MIMO OFDM. In this paper I first described about the latest MIMO OFDM channel estimation which is super resolution approach that explores spatial and temporal correlation of MIMO-OFDM. I then implemented it using MMSE ch...

1999
Seunghyun Min Kwang Bok Lee

Abstract In this paper, a zero-delay channel estimation scheme based on both pilot and traffic channels is proposed for next generation direct sequence codedivision multiple-access (DS/CDMA) systems. This scheme has no channel estimation delay, and is found to perform significantly better than a zero-delay channel estimation scheme based on only pilot channel. The elimination of channel estimat...

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...

2003
Hüseyin Arslan Tevfik Yücek

In this paper, estimation of both global (long term) and local (instantaneous) frequency selectivity and rms delay spread of wireless communication channel are investigated. A practical algorithm for averaged channel frequency correlation estimation, which is used for measuring frequency selectivity, is given. Average rms delay spread of the channel is calculated from the channel frequency corr...

2014
Rajarshi Banerjee

IEEE 802.11ad is an enhancement to the IEEE 802.11 family standard, that enables multi-gigabyte wireless communication in 60 GHz. In this paper, we propose a unique pilot design and corresponding channel estimation method for a frequency selective fading 60 GHz channel. It is shown that in our proposed channel estimation the number of pilot subcarrier are fixed in one OFDM symbol, but the pilot...

Journal: :CoRR 2013
Guan Gui Abolfazl Mehbodniya Fumiyuki Adachi

Broadband signal transmission over frequencyselective fading channel often requires accurate channel state information at receiver. One of the most attracting adaptive channel estimation methods is least mean square (LMS) algorithm. However, LMS-based method is often degraded by random scaling of input training signal. To improve the estimation performance, in this paper we apply the standard l...

2002
Shinsuke TAKAOKA

Adaptive prediction iterative channel estimation is presented for combined antenna diversity and coherent rake reception of direct sequence spread spectrum (DSSS) signals. Its first stage uses pilot-aided adaptive prediction channel estimation, while the succeeding iteration stages use decision feedback and moving average filtering for channel re-estimation. The bit error rate (BER) performance...

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