无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2014年
4期
73-76
,共4页
李一杰%周新力%宋斌斌
李一傑%週新力%宋斌斌
리일걸%주신력%송빈빈
信道估计%DFT%正交频分复用%短波通信
信道估計%DFT%正交頻分複用%短波通信
신도고계%DFT%정교빈분복용%단파통신
channel estimation%DFT%orthogonal frequency division multiplexing%HF communication
针对采用梳状导频的正交频分复用( OFDM)短波通信系统,提出一种基于分块离散傅里叶变换( DFT)的信道估计内插算法,并运用数据翻转思想对算法进行改进,减小所提算法产生的边缘效应在高信噪比条件下对算法性能的影响,提高在高信噪比条件下所提算法的估计精度。仿真结果表明,该信道估计内插算法较传统算法计算量有所减小,信道估计精度略有提高。
針對採用梳狀導頻的正交頻分複用( OFDM)短波通信繫統,提齣一種基于分塊離散傅裏葉變換( DFT)的信道估計內插算法,併運用數據翻轉思想對算法進行改進,減小所提算法產生的邊緣效應在高信譟比條件下對算法性能的影響,提高在高信譟比條件下所提算法的估計精度。倣真結果錶明,該信道估計內插算法較傳統算法計算量有所減小,信道估計精度略有提高。
침대채용소상도빈적정교빈분복용( OFDM)단파통신계통,제출일충기우분괴리산부리협변환( DFT)적신도고계내삽산법,병운용수거번전사상대산법진행개진,감소소제산법산생적변연효응재고신조비조건하대산법성능적영향,제고재고신조비조건하소제산법적고계정도。방진결과표명,해신도고계내삽산법교전통산법계산량유소감소,신도고계정도략유제고。
A channel estimation based on block DFT interpolation algorithm is proposed for comb-type pilot in OFDM systems for HF communication.The algorithm is improved by using the data-flipping idea in order to reduce the impact of edge effect in high SNR conditions on the performance of algorithm and improve the estimation precision of algorithm under the condition of high SNR.The simu-lation results show that the proposed interpolation channel estimation algorithm has less amount of calculation and higher channel esti-mation precision,compared with traditional algorithm.