In this paper,we propose a wireless channel testing method and construct the test platform for the Gbps broadband wireless system.The proposed method is implemented to evaluate the transmission performance according t...In this paper,we propose a wireless channel testing method and construct the test platform for the Gbps broadband wireless system.The proposed method is implemented to evaluate the transmission performance according to the acquired field test results.The results have shown that the proposed channel test algorithm is valid and efficient,which can continuously show the variation of system throughput,frame loss rate and latency.展开更多
A high accuracy frequency synchronization method is proposed for the 3rd generation partnership project （3GPP） long term evolution advanced （LTE-A） downlink receiver in time division duplexing （TDD） mode. In gen...A high accuracy frequency synchronization method is proposed for the 3rd generation partnership project （3GPP） long term evolution advanced （LTE-A） downlink receiver in time division duplexing （TDD） mode. In general, cyclic prefix （CP） correlation based fractional frequency offset （FFO） estimation method and primary synchronization signal （PSS） differential correlation based integer frequency offset （IFO） estimation method are applied for LTE-A frequency synchronization. However, the polarity of CP based FFO estimation result may get reversed when system FFO is closer to the edge of frequency estimation range on account of noise interference; PSS based IFO estimation has performance degradation in low signal noise ratio （SNR）. We propose polarity detection aided CP based FFO estimation and frequency domain enhanced differential correlation based IFO estimation to obtain higher accuracy of frequency synchronization. Computer simulation shows that the proposed method greatly outperforms the conventional methods, especially in low SNR scenario.展开更多
基金supported by International Scientific and Technological Cooperation Program from MOST.(No.S2010GR0902)the Science and Technology Innovation Program of Shanghai(No.09dz2201100)+1 种基金Equipment Functional Development of Technological Innovation Projects from CAS(No.YG2010060)Research Fund of National Mobile Communications Research Laboratory,Southeast University(No.2009A04)
文摘In this paper,we propose a wireless channel testing method and construct the test platform for the Gbps broadband wireless system.The proposed method is implemented to evaluate the transmission performance according to the acquired field test results.The results have shown that the proposed channel test algorithm is valid and efficient,which can continuously show the variation of system throughput,frame loss rate and latency.
基金supported by the Natural Science Foundation of Shanghai (11ZR1435100)Chinese National Key Project (2009ZX03003002,2011ZX0300100703,and 2012ZX03001008-004)
文摘A high accuracy frequency synchronization method is proposed for the 3rd generation partnership project （3GPP） long term evolution advanced （LTE-A） downlink receiver in time division duplexing （TDD） mode. In general, cyclic prefix （CP） correlation based fractional frequency offset （FFO） estimation method and primary synchronization signal （PSS） differential correlation based integer frequency offset （IFO） estimation method are applied for LTE-A frequency synchronization. However, the polarity of CP based FFO estimation result may get reversed when system FFO is closer to the edge of frequency estimation range on account of noise interference; PSS based IFO estimation has performance degradation in low signal noise ratio （SNR）. We propose polarity detection aided CP based FFO estimation and frequency domain enhanced differential correlation based IFO estimation to obtain higher accuracy of frequency synchronization. Computer simulation shows that the proposed method greatly outperforms the conventional methods, especially in low SNR scenario.
