论文标题
继电器协助OFDM，并在多跳合作网络中调制子载波编号
Relay Assisted OFDM with Subcarrier Number Modulation in Multi-Hop Cooperative Networks
论文作者
论文摘要
具有子载波数量调制（OFDM-SNM）的正交频划分多路复用（OFDM）表现出其高光谱效率（SE）的出色性质，并且对于信号估计而言低复杂性。为了利用OFDM-SNM的空间增益，我们在这封信中提出了一个用于多跳合作系统的继电器协助OFDM-SNM方案。据规定，每个跳跃中都存在通过解码和前向（DF）和半双链（HD）协议操作的继电器。我们分析了继电器协助OFDM-SNM系统的中断性能。平均停电概率以封闭形式近似。此外，为了揭示继电器协助OFDM-SNM的多样性和编码增长，我们通过功率序列扩展探索了高信噪比（SNR）的渐近中断性能。为了验证停电性能和能源效率的提高，我们与传统的OFDM-SNM之间进行了比较，从源到目的地的一定距离进行了比较。仿真结果证实了派生的中断概率，并在本信中洞悉了所提出的系统。
Orthogonal frequency-division multiplexing (OFDM) with subcarrier number modulation (OFDM-SNM) manifests its superior nature of high spectral efficiency (SE) and low complexity for signal estimation. To exploit the spatial gain of OFDM-SNM, we propose a relay assisted OFDM-SNM scheme for multi-hop cooperative systems in this letter. It is stipulated that a relay operated by decode-and-forward (DF) and half-duplex (HD) protocols exists in each hop. We analyze the outage performance of the relay assisted OFDM-SNM system. The average outage probability is approximated in closed form. Moreover, to reveal the diversity and coding gains of relay assisted OFDM-SNM, we explore the asymptotic outage performance at high signal-to-noise ratio (SNR) by power series expansion. To verify the improvement on outage performance and energy efficiency, we carry out the comparison among different multi-hops systems with traditional OFDM-SNM fixing a certain distance from source to destination. Simulation results corroborate the derived outage probabilities and provide insight into the proposed system in this letter.
