Improvement of Channel Estimation for Chinese Dtmb Sc-mode
نویسندگان
چکیده
Chinese Digital Terrestrial/Television Multimedia Broadcasting (DTMB) systems use pseudo random noise (PN) sequence instead of cyclic prefix for channel estimation. This paper proposes threshold and CIR width detection methods to improve the channel estimation and shows that threshold method combined with averaging and PN correlation reduction method needs special care for high DUR condition and that CIR width detection is another improvement method to solve the high DUR condition channel estimation.
منابع مشابه
Tccr Based Isi Cancellation Improvement by Channel Estimation in Dtmb Mc-mode
In Digital Terrestrial/Television Multimedia Broadcasting (DTMB) Multicarrier (MC) mode system, Tail Cancellation and Cyclic Restoration (TCCR) is needed for Inter Symbol Interference (ISI) cancelling. In this paper, Threshold method combinated with averaging method and Power profile width detection method are proposed as new channel estimation in order to improve the performance of TCCR.
متن کاملEmpirical Mode Decomposition based Adaptive Filtering for Orthogonal Frequency Division Multiplexing Channel Estimation
This paper presents an empirical mode decomposition (EMD) based adaptive filter (AF) for channel estimation in OFDM system. In this method, length of channel impulse response (CIR) is first approximated using Akaike information criterion (AIC). Then, CIR is estimated using adaptive filter with EMD decomposed IMF of the received OFDM symbol. The correlation and kurtosis measures are used to sel...
متن کاملDesign of integrated Guidance and control system in the pitch channel using observer based chattering free sliding mode theory
The design of integrated guidance and control system for flying objects is one of the research fields in the aerospace that is considered by researchers in recent years. Due to the nonlinearity of the kinematic and dynamic equations of the homing interceptors in the terminal phase and also existence of uncertainties such as target maneuvers, external disturbances and variations in aerodynamic c...
متن کاملAn Improvement on the Estimation of River ECs using ANN Models and ANFIS involving PCA Analysis, Case Study; Nekarood River, IRAN
Estimation of changes in water quality parameters including electrical conductivity along a river is essential. In this paper, ANN and ANFIS-SC were used to estimate the ECs of the Nekarood River, North Iran, from 1992-2013. The study period was divided into two periods of dry and wet, based on the river flow rate. Then, Using the PCA, the effective parameters in EC estimation were determined...
متن کاملبهبود کارآیی سیستم UWB مبتنی بر TiR در شرایط تخمینگر غیر ایده آل کانال
In this paper, we improve the performance of the TiR-UWB communication systems with the non-ideal estimation of the channel. Time Reversal (TiR) technique is an effective and simple method for data transmission in extremely multipath indoor UWB channels that mitigates the complexity of receiver by its own time focusing feature. Although, TiR method has the suitable performance, but it is sensit...
متن کامل