Abstract
In this paper, we propose the coordinate change schemes for improving the performance of blind equalizer such as MCMA (modified constant modulus algorithm) which compensate for ISI channel effect. ISI (inter symbol interference) is generated due to user’s movement in the mobile satellite communication environment. Satellite communication systems do not use pilot signals for channel estimation. Blind equalization techniques such as MCMA are well known that it is possible to estimate and to compensate for channel without pilot signals. It is necessary to improve the blind equalizer performance. Therefore, we propose the coordinate change schemes for improve the equalization performance in 16-APSK. We confirm that this proposed method has better equalization performance than conventional MCMA.
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