计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2013年
7期
106-109
,共4页
协作通信%中继选择%可行中继区域%中继位置%功率分配%几何规划
協作通信%中繼選擇%可行中繼區域%中繼位置%功率分配%幾何規劃
협작통신%중계선택%가행중계구역%중계위치%공솔분배%궤하규화
cooperative communications%relay selection%feasible relay region%relay location%power allocation%geometric programming
针对协作通信中的中继选择问题,提出不同功率分配方式下的自适应中继选择方案,仅在必要时引入额外中继。在源节点和中继节点等功率分配时,利用定义的可行双中继区域缩小候选中继搜索范围。在最优功率分配时,利用几何规划方法对潜在中继进行遍历搜索。仿真结果表明,与传统固定选择方案相比,该方案可有效降低系统功耗。
針對協作通信中的中繼選擇問題,提齣不同功率分配方式下的自適應中繼選擇方案,僅在必要時引入額外中繼。在源節點和中繼節點等功率分配時,利用定義的可行雙中繼區域縮小候選中繼搜索範圍。在最優功率分配時,利用幾何規劃方法對潛在中繼進行遍歷搜索。倣真結果錶明,與傳統固定選擇方案相比,該方案可有效降低繫統功耗。
침대협작통신중적중계선택문제,제출불동공솔분배방식하적자괄응중계선택방안,부재필요시인입액외중계。재원절점화중계절점등공솔분배시,이용정의적가행쌍중계구역축소후선중계수색범위。재최우공솔분배시,이용궤하규화방법대잠재중계진행편력수색。방진결과표명,여전통고정선택방안상비,해방안가유효강저계통공모。
For the relay selection in cooperative communications, adaptive relay selection strategies are proposed for different power allocation schemes, where an additional relay can be employed when it is necessary. For Equal Power Allocation(EPA) among the source and relays, the search range of candidate relays can be effectively decreased by using the defined feasible two-relay region. For Optimal Power Allocation(OPA), the potential relays can be searched exhaustively by geometric programming. Numerical simulation results show that the proposed adaptive relay selection strategy with power optimization can significantly reduce the power consumption of the system compared with the traditional fixed selection strategy.