ID 原文 译文
24375 和传统的固定工作电压相比，该文设计的 DC-DC 变换器最大可节省 83%的能耗。 The maximum energy saving of 83% is obtained with the proposed converter compared to the traditional fixed voltage.
24376 该文针对大规模MIMO FDD下行系统，联合考虑信道估计与数据传输两个阶段的资源分配问题，提出一种能效资源分配算法。 An energy-efficient resource allocation method is provided for the downlink massive Multiple-Input Multiple-Output (MIMO) Frequency Division Duplexing (FDD) system, which jointly evaluates the channel estimation stage and data transmission stage.
24377 该方法以最大化能效为目标，以导频时长、导频功率和数据功率为参量，在指定发射功率和频谱效率约束的条件下建立优化模型。 The optimization problem is established based on the Energy Efficiency (EE) maximization by adjusting the pilot duration, pilot power and data power under the constraint of total transmit energy and spectral efficiency requirement.
24378 由于目标函数无精确解析形式，借助确定性等价原理对其近似并求得闭合表达式。 Since the analytical expression of the involved objective function is intractable, a closed-form expression is deduced using deterministic equivalent approximation technology.
24379 进而，利用分数规划将原分式形式目标函数等价转换为减式形式，再利用目标函数的下界将非凸优化问题逐步释放为相对容易求解的等效问题，最终获得一种3层迭代能效资源优化算法。 Based on this, the original non-convex fractional optimization problem is transformed into an equivalent problem in subtractive form by the means of fraction programming. Then, a lower bound of the transformed objective function is employed, which induces a relatively easy-to-solve equivalent problem. Finally, a three-layer iterative algorithm is developed.
24380 仿真结果验证了所提算法的有效性，且具有较快的收敛速度。 Numerical results validate the effectiveness and relatively fast convergence speed of the proposed algorithm.
24381 在主动频谱切换中，预先确定目标信道存在高失效风险，从而增加切换时延的问题。 The predetermined target channel has high risk of being unavailable in the proactive-decision spectrum handoff.
24382 该文提出一种基于混合主被动频谱切换的最优目标信道选择算法。 To solve this problem, an optimum target channel selection algorithm based on hybrid spectrum handoff is proposed.
24383 该算法结合主动频谱切换和被动频谱切换的优点，引入最小累积切换时延评价标准，综合考虑次用户的多次中断、主用户的到达率和非理想频谱检测对次用户累积切换时延的影响，并详细分析和推导了非理想检测下次用户的累积切换时延。 This algorithm coordinates the advantages of both the proactive-decision and reactive-decision spectrum handoffs. With the metric of minimizing the cumulative handoff delay, the impacts of secondary user's multiple interruptions, primary user's arrival rates and imperfect sensing on secondary user's cumulative handoff delay are included and the detailed analysis and derivation of the secondary user's cumulative handoff delay are conducted under imperfect sensing.
24384 仿真表明，相较于主动和被动频谱切换中目标信道选择策略，在信道状态变化频繁或业务量较大等极端情况下，该算法的性能优势尤为明显。 Compared with proactive-decision and reactive-decision target channel selection schemes, the simulation results demonstrate that the performance of the proposed algorithm is especially excellent with frequent channel states variations or heavy traffic loads.