Sparsity-constraint LMS Algorithms for Time-varying UWB Channel Estimation
نویسندگان
چکیده
منابع مشابه
channel estimation for mimo-ofdm systems
تخمین دقیق مشخصات کانال در سیستم های مخابراتی یک امر مهم محسوب می گردد. این امر به ویژه در کانال های بیسیم با خاصیت فرکانس گزینی و زمان گزینی شدید، چالش بزرگی است. مقالات متعدد پر از روش های مبتکرانه ای برای طراحی و آنالیز الگوریتم های تخمین کانال است که بیشتر آنها از روش های خاصی استفاده می کنند که یا دارای عملکرد خوب با پیچیدگی محاسباتی بالا هستند و یا با عملکرد نه چندان خوب پیچیدگی پایینی...
On Channel Estimation in MB-OFDM UWB Systems with Time Varying Dispersive Fading Channel
New channel estimation technique is proposed for multiband orthogonal frequecny division multiplexing (MB-OFDM) ultra wideband (UWB) systems in multipath time varying wireless channels. Two-stages approch has been used to achieve this purpose. In first stage, Winner-Hopf filtration has been employed for the interpolation of unknown channel state information (CSI) using comb-type known pilots. I...
متن کاملJoint detection and channel estimation algorithms for QS-CDMA signals over time-varying channels
We consider a quasi-synchronous code-division multiple access (QS-CDMA) cellular system, where the code delay uncertainty at the base station is limited to a small number of chips. For such QS-CDMA systems, the need for code acquisition is eliminated, however, the residual code tracking and channel estimation problems still have to be solved. An extended Kalman filter (EKF) is employed to track...
متن کاملChannel Estimation and Signal Detection for UWB
In this paper, we investigate channel estimation and signal detection for UWB communications. We first investigate channel estimation for UWB systems and then develop a minimum meansquare-error (MMSE) Rake receiver with joint timing andMMSE equalization. The key property of the estimator is that it uses sampling at UWB symbol rate (200Msamples/s), while estimating all relevant channel parameter...
متن کاملSAGE Algorithm for UWB Channel Parameter Estimation
UWB signals have become popular for ranging and positioning systems. Since such systems require the extraction of location related information from the radio channel, efficient methods are required to obtain the parameters of interest. This paper presents a simple extension to the SAGE algorithm that makes the algorithm suitable for analyzing UWB channels. It is demonstrated that a phased array...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Research Journal of Applied Sciences, Engineering and Technology
سال: 2014
ISSN: 2040-7459,2040-7467
DOI: 10.19026/rjaset.8.1247