CAJ | 학술논문

基于现今越来越多的算法需要信噪比的先验知识来进行性能优化,论述了信噪比估计在通信系统中具有的重要作用,介绍了信噪比估计算法的信号模型。通过分析现有的几种信噪比估计算法在较大的信噪比范围内的估计性能,提出了改进的信噪比估计算法,并对新算法的估计均值、估计偏差和估计方差进行了仿真。仿真及分析结果表明,改进的算法在较大的信噪比范围内性能良好,估计准确。
기우현금월래월다적산법수요신조비적선험지식래진행성능우화,논술료신조비고계재통신계통중구유적중요작용,개소료신조비고계산법적신호모형。통과분석현유적궤충신조비고계산법재교대적신조비범위내적고계성능,제출료개진적신조비고계산법,병대신산법적고계균치、고계편차화고계방차진행료방진。방진급분석결과표명,개진적산법재교대적신조비범위내성능량호,고계준학。
Nowadays,more and more algorithms need the SNR information to improve their performance.In this paper,we first discuss the importance of SNR estimation in communication system and introduce the signal model used in SNR estimation algorithm.Then based on the performance analysis of several existing estimation algorithms,we propose an improved SNR estimation algorithm.Finally,we evaluate the estimation mean value,estimation error and estimation variance of our algorithm through simulation and the simulation results show that our algorithm can obtain a precise estimation in large SNR range.