On enhancing hierarchical modulation

  title={On enhancing hierarchical modulation},
  author={Shu Qin Wang and Soonyil Kwon and B. K. Yi},
  journal={2008 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting},
Hierarchical modulation offers an important coverage/throughput tradeoff for wireless communication, however it has received relatively little attention to date. Regular hierarchical modulation suffers from the interference between layers. It results in both achievable capacity decrease and bit- error rate increase. In this paper, an enhanced hierarchical modulation technique along with three optimization schemes, in which the enhancement-layer signal constellation is rotated, are presented and… CONTINUE READING
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