| Paper: | SPCOM-P9.7 | ||
| Session: | (Semi)blind Techniques II | ||
| Time: | Thursday, May 20, 15:30 - 17:30 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing for Communications: (Blind/Semiblind) Channel Estimation | ||
| Title: | VARIABLE-STEP-SIZE MULTIMODULUS BLIND DECISION-FEEDBACK EQUALIZATION FOR HIGH-ORDER QAM BASED ON BOUNDARY MSE ESTIMATION | ||
| Authors: | Kun-Chien Hung; National Chiao Tung University | ||
| David Lin; National Chiao Tung University | |||
| Chun-Nan Ke; Industrial Technology Research Institute | |||
| Abstract: | We consider blind decision-feedback equalization (DFE) under high-order modulation, which presents more difficult operating requirements than lower-order modulation. We base our design on the multimodulus algorithm (MMA). To attain fast convergence speed and low steady-state mean-square error (MSE), we consider varying the adaptation step size according to the presently achieved MSE. For this we investigate the properties of the MSE under blind MMA-based DFE and, based on the results, propose a method to estimate its value. The estimate is obtained by analyzing those equalizer filter outputs whose values fall outside the boundary of the modulation's constellation. Simulation results demonstrate the effectiveness of the proposed scheme. | ||
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