Power Delay Profile Estimation in Mimo Ofdm Systems Using Lmmse
نویسندگان
چکیده
This project evaluate the performance of improved power delay profile estimation in Multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) systems under linear minimum mean square error(LMMSE) channel. The distortions caused by null subcarriers and a short range of samples for PDP estimation is also considered. The proposed technique effectively estimates the distortions caused by PDP. Simulation results show that the performance of extended kalman filtering estimation using the different PDP is more appropriate. The output is compared against different antenna system and with different delay profiles along with the conventional LMMSE.
منابع مشابه
Channel Estimation in MIMO-OFDM Systems
In this work various channel estimation algorithms of the Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) are studied. The result of Linear Minimum Mean Square Error (LMMSE) channel estimation algorithm was compared with the Least Squares (LS) and Minimum Mean Square Error (MMSE) for both OFDM and MIMO-O...
متن کاملDetection algorithms and ASIC designs for MIMO-OFDM downlink receivers
Future wireless systems will require high data rate with low transmit and processing power consumption. A combination of multiple-input multiple-output (MIMO) transmission with orthogonal frequency division multiplexing (OFDM) is a promising approach for offering better performance in terms of the capacity and quality of service (QoS). The detector in the wireless receiver is one of the highest...
متن کاملOptimal Power Allocation for Channel Estimation in MIMO-OFDM System with Per-Subcarrier Transmit Antenna Selection
A novel hybrid channel estimator is proposed for multiple-input multiple-output orthogonal frequencydivision multiplexing (MIMO-OFDM) system with per-subcarrier transmit antenna selection having optimal power allocation among subcarriers. In practice, antenna selection information is transmitted through a binary symmetric control channel with a crossover probability. Linear minimum mean-square ...
متن کاملComparison between Performances of Channel Estimation Techniques for CP-LTE and ZP-LTE Downlink Systems
In this paper, we propose to evaluate the performance of channel estimation techniques for Long Term Evolution (LTE) Downlink systems based on Zero Padding technique (ZP) instead of Cyclic Prefixing (CP). LTE Downlink system is a multiuser system based on a MIMO-OFDMA technology. Usually, in OFDM systems, a guard interval is inserted in order to mitigate both inter-carrier interference (ICI) an...
متن کاملSelective Tone Reservation method for PAPR reduction in SFBC-OFDM systems
The high Peak to Average Power Ratio (PAPR) of Orthogonal Frequency Division Multiplexing (OFDM) and MIMO-OFDM systems reduces the system efficiency. In this paper, an extension of Tone Reservation (TR) method is introduced for PAPR reduction in Space Frequency Block Coded OFDM (SFBC-OFDM) systems. The proposed algorithm is based on a time domain kernel which is added to the signal of the anten...
متن کامل