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Hierarchical modulation (HM), which involves a \u201cbase\u2010layer\u201d (BL) and an \u201cenhancement\u2010layer\u201d (EL) bit streams, is a simple technique for achieving tradeoff between service quality and radio coverage. Therefore, it is appealing for MBMS. Generally, HM suffers from the severe performance degradation of the less protected EL stream. In this paper, HM with vector rotation operation introduced to EL stream is proposed, in order to improve EL\u2032s performance. With the proper interleaving in frequency domain, this operation can exploit the inherent diversity gain from the multipath channel. In this way, HM with vector rotation can effectively enhance multimedia broadcasting on quality video and coverage. The simulation results with scalable video coding (SVC) as source show the significant benefits in comparison with the conventional HM and alternative schemes.<\/jats:p>","DOI":"10.1155\/2010\/316749","type":"journal-article","created":{"date-parts":[[2010,9,20]],"date-time":"2010-09-20T18:36:30Z","timestamp":1285007790000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Hierarchical Modulation with Vector Rotation for E\u2010MBMS Transmission in LTE Systems"],"prefix":"10.1155","volume":"2010","author":[{"given":"Hui","family":"Zhao","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoping","family":"Zhou","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yunchuan","family":"Yang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wenbo","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2010,9,20]]},"reference":[{"key":"e_1_2_9_1_2","doi-asserted-by":"publisher","DOI":"10.1109\/18.945238"},{"key":"e_1_2_9_2_2","doi-asserted-by":"crossref","unstructured":"BoradeS. 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