In this paper, we compare the performance between channel estimation based on compressed sensing (CS) and time-domain least square (LS) for single-carrier (SC) communication system. Unlike the conventional channel est...In this paper, we compare the performance between channel estimation based on compressed sensing (CS) and time-domain least square (LS) for single-carrier (SC) communication system. Unlike the conventional channel estimation techniques such as frequency domain LS which is used in the condition that the length of pilot sequence is equal to data sequence, the estimation scheme based on CS requires smaller length of pilot sequence. In this paper, the corresponding system structure is presented. Zadoff-Chu sequence is used to generate the pilot sequence, which is shown to perform better in forming measurement matrix of CS than pseudo random sequence. Simulation results demonstrate that channel estimation based on CS achieves a better bit error rate (BER) performance than time domain LS with a smaller pilot sequence and thus raising data rate of the SC communication system.展开更多
在美国电信科学协会(institute for telecommunication sciences,ITS)模型的基础上设计了一款易于仿真实现的宽带短波信道模拟器。通过分析其信道散射函数,验证了宽带短波信道模拟器模拟实际短波信道的有效性。采用该宽带短波信道模拟...在美国电信科学协会(institute for telecommunication sciences,ITS)模型的基础上设计了一款易于仿真实现的宽带短波信道模拟器。通过分析其信道散射函数,验证了宽带短波信道模拟器模拟实际短波信道的有效性。采用该宽带短波信道模拟器仿真测试了24 kHz信道带宽下的单载波频域均衡(single carrier modulation system withfrequency domain equalization,SC-FDE)数据传输系统的性能,说明了宽带短波信道模拟器的实际工作能力,并通过与Watterson信道模拟器的测试结果对比,证明了该宽带短波信道模拟器能更准确地测试短波宽带高速数据传输系统的性能。展开更多
文摘In this paper, we compare the performance between channel estimation based on compressed sensing (CS) and time-domain least square (LS) for single-carrier (SC) communication system. Unlike the conventional channel estimation techniques such as frequency domain LS which is used in the condition that the length of pilot sequence is equal to data sequence, the estimation scheme based on CS requires smaller length of pilot sequence. In this paper, the corresponding system structure is presented. Zadoff-Chu sequence is used to generate the pilot sequence, which is shown to perform better in forming measurement matrix of CS than pseudo random sequence. Simulation results demonstrate that channel estimation based on CS achieves a better bit error rate (BER) performance than time domain LS with a smaller pilot sequence and thus raising data rate of the SC communication system.
