To reduce the negative impact of the power amplifier(PA)nonlinear distortion caused by the orthogonal frequency division multiplexing(OFDM)waveform with high peak-to-average power ratio(PAPR)in integrated radar and co...To reduce the negative impact of the power amplifier(PA)nonlinear distortion caused by the orthogonal frequency division multiplexing(OFDM)waveform with high peak-to-average power ratio(PAPR)in integrated radar and communication(RadCom)systems is studied,the channel estimation in passive sensing scenarios.Adaptive channel estimation methods are proposed based on different pilot patterns,considering nonlinear distortion and channel sparsity.The proposed methods achieve sparse channel results by manipulating the least squares(LS)frequency-domain channel estimation results to preserve the most significant taps.The decision-aided method is used to optimize the sparse channel results to reduce the effect of nonlinear distortion.Numerical results show that the channel estimation performance of the proposed methods is better than that of the conventional methods under different pilot patterns.In addition,the bit error rate performance in communication and passive radar detection performance show that the proposed methods have good comprehensive performance.展开更多
基于2μm的In Ga P/Ga As异质结双极晶体管(HBT)工艺设计了一种可应用于IEEE802.11 b/g/n无线局域网(WLAN)的高线性度射频功率放大器。为了提高射频功率放大器的线性度,采用了负反馈镜像电路提供直流工作点,设计了良好的输入、输出和级...基于2μm的In Ga P/Ga As异质结双极晶体管(HBT)工艺设计了一种可应用于IEEE802.11 b/g/n无线局域网(WLAN)的高线性度射频功率放大器。为了提高射频功率放大器的线性度,采用了负反馈镜像电路提供直流工作点,设计了良好的输入、输出和级间匹配电路来提高射频功率放大器的线性输出功率。流片结果表明,在工作电压为3.3 V时,射频功率放大器的1 d B线性压缩输出功率(P1d B)可达27 d Bm,当误差向量幅度(EVM)为3%时,2.4 GHz64 QAM激励下,输出功率可达19.8 d Bm,满足标准规范要求。展开更多
基金supported by the National Natural Science Foundation of China(61931015,62071335,62250024)the Natural Science Foundation of Hubei Province of China(2021CFA002)+1 种基金the Fundamental Research Funds for the Central Universities of China(2042022dx0001)the Science and Technology Program of Shenzhen(JCYJ20170818112037398).
文摘To reduce the negative impact of the power amplifier(PA)nonlinear distortion caused by the orthogonal frequency division multiplexing(OFDM)waveform with high peak-to-average power ratio(PAPR)in integrated radar and communication(RadCom)systems is studied,the channel estimation in passive sensing scenarios.Adaptive channel estimation methods are proposed based on different pilot patterns,considering nonlinear distortion and channel sparsity.The proposed methods achieve sparse channel results by manipulating the least squares(LS)frequency-domain channel estimation results to preserve the most significant taps.The decision-aided method is used to optimize the sparse channel results to reduce the effect of nonlinear distortion.Numerical results show that the channel estimation performance of the proposed methods is better than that of the conventional methods under different pilot patterns.In addition,the bit error rate performance in communication and passive radar detection performance show that the proposed methods have good comprehensive performance.
文摘基于2μm的In Ga P/Ga As异质结双极晶体管(HBT)工艺设计了一种可应用于IEEE802.11 b/g/n无线局域网(WLAN)的高线性度射频功率放大器。为了提高射频功率放大器的线性度,采用了负反馈镜像电路提供直流工作点,设计了良好的输入、输出和级间匹配电路来提高射频功率放大器的线性输出功率。流片结果表明,在工作电压为3.3 V时,射频功率放大器的1 d B线性压缩输出功率(P1d B)可达27 d Bm,当误差向量幅度(EVM)为3%时,2.4 GHz64 QAM激励下,输出功率可达19.8 d Bm,满足标准规范要求。
