The Long Term Evolution (LTE) system imposes high requirements for dispatching delay.Moreover,very large air interface rate of LTE requires good processing capability for the devices processing the baseband signals.Co...The Long Term Evolution (LTE) system imposes high requirements for dispatching delay.Moreover,very large air interface rate of LTE requires good processing capability for the devices processing the baseband signals.Consequently,the single-core processor cannot meet the requirements of LTE system.This paper analyzes how to use multi-core processors to achieve parallel processing of uplink demodulation and decoding in LTE systems and designs an approach to parallel processing.The test results prove that this approach works quite well.展开更多
LTE(Long Term Evolution,长期演进)是3G与4G技术之间的一个过渡,是3.9G的全球标准,它改进并增强了3G的空中接入技术,采用OFDM和MIMO作为其无线网络演进的唯一标准。文中首先介绍了LTE系统的上行传输方案和基于导频信号的信道估计算法,...LTE(Long Term Evolution,长期演进)是3G与4G技术之间的一个过渡,是3.9G的全球标准,它改进并增强了3G的空中接入技术,采用OFDM和MIMO作为其无线网络演进的唯一标准。文中首先介绍了LTE系统的上行传输方案和基于导频信号的信道估计算法,然后针对LTE上行信道中的PUSCH信道(物理上行共享信道)提出了一套基于MMSE、线性插值以及基于判决反馈的信道跟踪算法的信道估计方案,并给出了该方案的性能仿真图。展开更多
In 3GPP (the 3rd Generation Partnership Project) LTE (Long Term Evolution) systems,the physical uplink shared channel (PUSCH) conveys uplink control information (UCI) back to eNodeB with or without UL-SCH (uplink shar...In 3GPP (the 3rd Generation Partnership Project) LTE (Long Term Evolution) systems,the physical uplink shared channel (PUSCH) conveys uplink control information (UCI) back to eNodeB with or without UL-SCH (uplink shared channel) data.Placeholders are inserted into the UCI to scramble in a way that maximizes the Euclidean distance of modulation symbols.Considering the attribution of encoding with placeholders,a simple and efficient decoding scheme is proposed in this paper.As shown in our simulation results,improved performance is achieved.展开更多
文摘The Long Term Evolution (LTE) system imposes high requirements for dispatching delay.Moreover,very large air interface rate of LTE requires good processing capability for the devices processing the baseband signals.Consequently,the single-core processor cannot meet the requirements of LTE system.This paper analyzes how to use multi-core processors to achieve parallel processing of uplink demodulation and decoding in LTE systems and designs an approach to parallel processing.The test results prove that this approach works quite well.
文摘LTE(Long Term Evolution,长期演进)是3G与4G技术之间的一个过渡,是3.9G的全球标准,它改进并增强了3G的空中接入技术,采用OFDM和MIMO作为其无线网络演进的唯一标准。文中首先介绍了LTE系统的上行传输方案和基于导频信号的信道估计算法,然后针对LTE上行信道中的PUSCH信道(物理上行共享信道)提出了一套基于MMSE、线性插值以及基于判决反馈的信道跟踪算法的信道估计方案,并给出了该方案的性能仿真图。
基金Funded by the Fundamental Research Funds for the Central Universities (XDJXS11161157)
文摘In 3GPP (the 3rd Generation Partnership Project) LTE (Long Term Evolution) systems,the physical uplink shared channel (PUSCH) conveys uplink control information (UCI) back to eNodeB with or without UL-SCH (uplink shared channel) data.Placeholders are inserted into the UCI to scramble in a way that maximizes the Euclidean distance of modulation symbols.Considering the attribution of encoding with placeholders,a simple and efficient decoding scheme is proposed in this paper.As shown in our simulation results,improved performance is achieved.
