scholarly journals Improved Pilot-Aided Channel Estimation for MIMO-OFDM Fading Channels

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
J. Mar ◽  
Chi-Cheng Kuo ◽  
M. B. Basnet
Keyword(s):  
Channel Estimation ◽  
Fading Channels ◽  
Mimo Ofdm

scholarly journals Simple Channel Estimation Techniques Based on Pilot-Assistance for STBC-Based MIMO-OFDM Systems

2009 ◽  
Author(s):  
Tran Duc Tan ◽  
Ta Duc Tuyen ◽  
Trinh Anh Vu ◽  
Huynh Huu Tue
Keyword(s):  
Channel Estimation ◽  
Fading Channels ◽  
Performance Improvement ◽  
Additive Noise ◽  
Multipath Fading ◽  
Ofdm Systems ◽  
Multipath Fading Channels ◽  
Pilot Assistance ◽  
Mimo Ofdm ◽  
High Flexibility

With equipping multiple antennas at both transmitter and receiver ends, the signals in the wireless OFDM systems could be transmitted over multipath fading channels for achieving benefits and high flexibility. In this paper, we focus on MIMO-OFDM systems that simultaneously perform channel estimation in order to combat additive noise, and multipath fading. The performance improvement is confirmed by simulations. Results show that the proposed MIMOOFDM scheme is quite robust in practical environments.

Channel estimation for MIMO-OFDM systems in rapid fading channels

2007 ◽  
Vol 11 (3) ◽  
pp. 278-282 ◽  
Author(s):  
Yun Wu ◽  
Han-wen Luo ◽  
Wen-tao Song ◽  
Jian-guo Huang
Keyword(s):  
Channel Estimation ◽  
Fading Channels ◽  
Ofdm Systems ◽  
Mimo Ofdm

scholarly journals Investigations on wavelet and Fourier transform based channel estimation in MIMO-OFDM system

2018 ◽  
Vol 7 (2.21) ◽  
pp. 228
Author(s):  
B Somasekhar ◽  
Ch Mohana Krishna ◽  
Y Murty
Keyword(s):  
Fourier Transform ◽  
Channel Estimation ◽  
Discrete Fourier Transform ◽  
Fading Channels ◽  
Multipath Fading ◽  
Estimation Methods ◽  
Ofdm System ◽  
Channel Estimator ◽  
Narrow Side ◽  
Mimo Ofdm

In this paper channel estimation methods for MIMO-OFDM system are investigated based on Fourier Transform and Wavelet Transform. The channel estimation algorithm based on Discrete Fourier Transform (DFT) cause energy leakage in multipath channel with non-sample-spaced time delays. Discrete Cosine Transform (DCT) based channel estimator can mitigate the drawback of Discrete Fourier Transform based channel estimator, when the non-sample spaced path delays are available in multipath fading channels. Wavelet based systems provide better spectral efficiency because of no cyclic prefix requirement, with narrow side lobes and also exhibit improved BER performance. Simulation results reveal that the DWT based transform outperforms the conventional DFT and DCT based channel estimator in terms of bit error rate and mean square error.  

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