CAJ | 학술논문

基于抵消窗函数的峰值抵消是正交频分复用系统中一种有效的峰值功率抑制算法。在峰值抵消正交频分复用中，抵消窗函数的选择将决定抵消过程中带外功率泄露程度及带内噪声分布。该文推导了峰值抵消噪声的频域分布特性，并通过数值仿真验证分析了抵消窗函数选择及截断长度对带外功率泄露的影响。另外还给出了基于带内抵消噪声估计的接收端检测方法。数值仿真结果表明，与现有抵消噪声估计方法相比较，该文提出的方法能更好的进行噪声恢复，并提高接收端性能。
기우저소창함수적봉치저소시정교빈분복용계통중일충유효적봉치공솔억제산법。재봉치저소정교빈분복용중，저소창함수적선택장결정저소과정중대외공솔설로정도급대내조성분포。해문추도료봉치저소조성적빈역분포특성，병통과수치방진험증분석료저소창함수선택급절단장도대대외공솔설로적영향。령외환급출료기우대내저소조성고계적접수단검측방법。수치방진결과표명，여현유저소조성고계방법상비교，해문제출적방법능경호적진행조성회복，병제고접수단성능。
Peak cancellation is a widely-used technique to reduce peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. However, peak cancellation, when implemented with a window function in time domain, will introduce in-band distortion and out-of-band radiation due to the nonlinear processing. In this paper, the spectral distribution of cancellation noise is analyzed based on a Bussgang nonlinear processing model, which is applied to the noise-aided decoder at the receiver side. The theoretic results are compared with the numeric simulation, and the BER performance is provided.