无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2011年
12期
12-14,25
,共4页
单载波频域均衡%信道估计%DFT%非整数倍采样间隔
單載波頻域均衡%信道估計%DFT%非整數倍採樣間隔
단재파빈역균형%신도고계%DFT%비정수배채양간격
SC-FDE%channel estimation%DFT%non-sampled spaced
研究基于离散傅里叶变换（Discrete Fourier Transform，DVT）的单载波频域均衡信道估计算法，分析了离散采样信道模型，将信道分为采样间隔和非采样间隔。采样间隔信道下，在循环前缀内进行阀值处理，同时估计出噪声方差；非采样间隔信道下，提出一种基于DFT的能量增长率估计算法，自适应地选择保留路径。仿真结果表明，基于DFF的信道估计算法可以有效地去除噪声的影响，提升均方误差及误码率性能。
研究基于離散傅裏葉變換（Discrete Fourier Transform，DVT）的單載波頻域均衡信道估計算法，分析瞭離散採樣信道模型，將信道分為採樣間隔和非採樣間隔。採樣間隔信道下，在循環前綴內進行閥值處理，同時估計齣譟聲方差；非採樣間隔信道下，提齣一種基于DFT的能量增長率估計算法，自適應地選擇保留路徑。倣真結果錶明，基于DFF的信道估計算法可以有效地去除譟聲的影響，提升均方誤差及誤碼率性能。
연구기우리산부리협변환（Discrete Fourier Transform，DVT）적단재파빈역균형신도고계산법，분석료리산채양신도모형，장신도분위채양간격화비채양간격。채양간격신도하，재순배전철내진행벌치처리，동시고계출조성방차；비채양간격신도하，제출일충기우DFT적능량증장솔고계산법，자괄응지선택보류로경。방진결과표명，기우DFF적신도고계산법가이유효지거제조성적영향，제승균방오차급오마솔성능。
The channel estimation based DFT for SC-FDE systems is studied. The discrete sampling channel model is analyzed. The channels are classified into the sampled spaced channel and the non-sampled spaced channel. On the sampled spaced channel, the threshold processing is introduced into the length of CP. The variance of the noise could also be estimated simultaneously. On the non-sampled spaced channel, a method of the energy increasing rate is proposed. The residual paths are selected adaptively. The simulation shows that the improved channel estimation based DFT will remove the effect of the noise effectively and improve the performance of the MSE and BER.
