一种OFDM系统子载波及峰均比联合优化算法  

Joint Optimization Algorithm for Subcarrier Selection and PAPR in OFDM Systems

作　　者：郑士远 韩军[1] 赵世铎 ZHENG Shiyuan;HAN Jun;ZHAO Shiduo(The 54th Research Institute of China Eectronics Tchnology Group Corporation,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第54研究所,石家庄050081

出　　处：《计算机测量与控制》2025年第2期293-300,共8页Computer Measurement &Control

摘　　要：正交频分复用作为无线通信中的一种核心调制技术,因其高频谱效率、强抗衰落能力以及稳定的传输性能而备受关注,然而OFDM系统中高峰均比问题会显著影响系统效率;同时,传统OFDM系统在所有子载波上传输信息,在严重频率选择性衰落信道中,深衰落频点处的子载波携带信息难以正确解调,这将导致系统误码率显著升高;为解决上述问题,提出了一种OFDM系统子载波及峰均比联合优化方法,根据具体的应用场景和信道状态动态调整所需子载波数目及位置,并结合PAPR抑制技术,以提高信号传输的可靠性;仿真结果表明提出方法不仅有效提升了误码性能,同时也显著降低了PAPR,从而优化了系统整体性能。Orthogonal frequency division multiplexing(OFDM),as a core modulation technology in wireless communications,is highly regarded for its spectral efficiency,strong anti fading ability,and stable transmission performance.However,high peak-to-average power ratio(PAPR)in OFDM systems significantly affects the efficiency of the system.Moreover,traditional OFDM systems transmit the information of all subcarriers,and in severely frequency-selective attenuation channels,it is difficult to correctly demodulate the information carried by subcarriers at deep attenuation frequency points resulting in a significant increase in the system s bit error rate(BER).To address these issues,a joint optimization method for subcarrier selection and PAPR in OFDM systems is proposed.The method dynamically adjusts the number and position of subcarriers according to specific application scenarios and channel conditions,integrating PAPR suppression techniques to improve the transmission reliability of signals.Simulation results demonstrate that the proposed approach not only effectively enhances BER performance,but also significantly reduces PAPR,thus optimizing overall system performance.

关 键 词：正交频分复用 峰均比 子载波 信道状态信息 限幅滤波 

分 类 号：TN914.3[电子电信—通信与信息系统]