Improved Channel Estimation Algorithms based on a Proposed Signal Model for PUCCH Format 3 in LTE-A

다국어 초록 (Multilingual Abstract)

SORTD (Space Orthogonal-Resource Transmit Diversity) has already become a better way of transmit diversity for PUCCH format 3 in LTE-A [1]. SORTD technology lies in the characteristic that each antenna port transmits signal by using different cyclic shift [2] to make orthogonal each other. Using the SORTD’s feature of incoherence in different antennas, this paper proposes a special form of signal model. Based on this proposed model, we propose a low complexity channel estimator based on LS and cubic spline interpolation, and then we put a LS and DCT algorithm to improve the interpolation performance. Finally, for more accurate estimator we drive the third approach based on MMSE and DCT. A series of theoretical researches and simulation results show that all of them are suitable for the proposed signal model even in the environment of high-speed movement; especially the algorithms with DCT have a better performance.

목차 (Table of Contents)

• Abstract
• 1. Introduction
• 2. System Model
• 2.1. The Generation of DMRS
• 2.2. Signal Model
• 3. Channel Estimation Model
• 3.1. The Channel Estimator based on LS and Cubic Spline Interpolation
• 3.2. The Channel Estimation Approach based on LS and DCT
• 3.3. The Channel Estimating Approach based on MMSE and DCT
• 4. Simulations and Analyses
• 4.1. Simulation Environment
• 4.2. The Analysis of Simulation Result
• 5. Conclusion
• Acknowledgement
• References