WLC03-6: Adaptive MC-CDMA Multiple Channel Estimation and Tracking over Time-Varying Multipath Fading Channels

2006 ◽  
Author(s):  
Bor-Sen Chen ◽  
Jung-Feng Liao
Keyword(s):  
Channel Estimation ◽  
Fading Channels ◽  
Multipath Fading ◽  
Time Varying ◽  
Multipath Fading Channels ◽  
Multiple Channel ◽  
Over Time

An Improved DFT-Based Channel Estimation Algorithm for OFDM System on Time-Varying Multipath Fading Channels

2014 ◽  
Vol 989-994 ◽  
pp. 3786-3789 ◽  
Author(s):  
Xin Li Ma ◽  
Tong Liang Fan ◽  
Yong Feng Du
Keyword(s):  
Channel Estimation ◽  
Fading Channels ◽  
Estimation Algorithm ◽  
Multipath Fading ◽  
Statistical Information ◽  
Time Varying ◽  
Ofdm Systems ◽  
Ofdm System ◽  
Multipath Fading Channels ◽  
Suppress Noise

An improved discrete Fourier transform DFT-based channel estimation for OFDM systems is proposed. Conventional DFT-based channel estimator improved its performance by suppressing noise, but it does not completely suppress noise. In order to overcome the disadvantage, this paper proposed a gate method without requiring any channel statistical information. This method comprehensively considersthe effects of the power of the strongest path and the noises. Computer simulation demonstrates the performance of the proposed algorithms in terms of bit error rate.

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.

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