1- https://doi.org/10.1007/s11767-011-0509-9
Channel estimation technique in multi-antenna AF relay communication systems
- Jan 1, 2011
- Journal of Electronics (China)
- Mingxue Chen +1 more
Abstract
The channel estimation technique is investigated in OFDM communication systems with multi-antenna Amplify-and-Forward (AF) relay. The Space-Time Block Code (STBC) is applied at the transmitter of the relay to obtain diversity gain. According to the transmission characteristics of OFDM symbols on multiple antennas, a pilot-aided Linear Minimum Mean-Square-Error (LMMSE) channel estimation algorithm with low complexity is designed. Simulation results show that, the proposed LMMSE estimator outperforms least-square estimator and approaches the optimal estimator without error in the performance of Symbol Error Ratio (SER) under several modulation modes, and has a good estimation effect in the realistic relay communication scenario.
- # Linear Minimum Mean-square-error
- # Symbol Error Ratio
- # OFDM Communication Systems
- # Amplify-and-Forward
- # Channel Estimation Technique
- # Space-Time Block Code
- # Channel Estimation Algorithm
- # Relay Communication
- # Modulation Modes
- # Amplify-and-Forward Relay Systems
