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Unlike the previous works where the transmission rate of each link is assumed to achieve Gaussian channel capacity, we design a practical superposition-coded relaying scheme with discrete AMC while taking into account the effect of decoding errors at each stage of the SIC process at each node. In our scheme, hierarchical modulation (HM) is used to create an SC message composed of one basic and one superposed message with optimized power allocation. We firstly introduce the proposed scheme without forward error correction (FEC) for high signal-to-noise ratio (SNR) region and provide the optimal power allocation between the superimposed messages. Next, we extend the uncoded scheme to incorporate FEC to overcome bad channel conditions. The power allocation in this case is based on an approximated expression of the bit error rate (BER). Numerical results show the performance gains of the proposed SC relaying scheme with HM compared to conventional schemes, over a large range of SNRs.<\/jats:p>","DOI":"10.1186\/1687-1499-2013-233","type":"journal-article","created":{"date-parts":[[2013,9,22]],"date-time":"2013-09-22T07:02:38Z","timestamp":1379833358000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Adaptive hierarchical modulation and power allocation for superposition-coded relaying"],"prefix":"10.1186","volume":"2013","author":[{"given":"Hirofumi","family":"Yamaura","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Megumi","family":"Kaneko","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kazunori","family":"Hayashi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hideaki","family":"Sakai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2013,9,22]]},"reference":[{"issue":"9","key":"800_CR1","doi-asserted-by":"publisher","first-page":"80","DOI":"10.1109\/MCOM.2004.1336724","volume":"42","author":"R Pabst","year":"2004","unstructured":"Pabst R, Walke B, Schultz DC, Herhold P: Relay-based deployment concepts for wireless and mobile broadband radio. 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