For Multi-Carrier-Code Division Multiple Access (MC-CDMA) systems,it is usually as- sumed that the fading of the subcarriers is frequency non-selective and independent of each other. This paper shows that the two assu...For Multi-Carrier-Code Division Multiple Access (MC-CDMA) systems,it is usually as- sumed that the fading of the subcarriers is frequency non-selective and independent of each other. This paper shows that the two assumptions are incompatible.In fact,the MC-CDMA signals at each subcarrier undergo fading that are highly correlated.Based on this observation,this paper develops a simulation algorithm for Rayleigh fading channels via frequency-domain correlation function,which incorporates the Doppler effect simultaneously.Numerical examples are presented to demonstrate the effectiveness of the new algorithm,with the conclusion that the independence assumption of subcar- rier fading overrates the system performance.展开更多
It is pointed out for the first time at the 18thCPC National Congress on November 8,2012 that"public diplomacy and cultural exchanges should be pushed forward",signifying integration of public diplomacy into...It is pointed out for the first time at the 18thCPC National Congress on November 8,2012 that"public diplomacy and cultural exchanges should be pushed forward",signifying integration of public diplomacy into China’s national strategy.Over the past year,China’s public diplomacy has made remarkable progress in institution-building,展开更多
基金Supported by the Major Program of the National Natural Science Foundation of China (No.60496311).
文摘For Multi-Carrier-Code Division Multiple Access (MC-CDMA) systems,it is usually as- sumed that the fading of the subcarriers is frequency non-selective and independent of each other. This paper shows that the two assumptions are incompatible.In fact,the MC-CDMA signals at each subcarrier undergo fading that are highly correlated.Based on this observation,this paper develops a simulation algorithm for Rayleigh fading channels via frequency-domain correlation function,which incorporates the Doppler effect simultaneously.Numerical examples are presented to demonstrate the effectiveness of the new algorithm,with the conclusion that the independence assumption of subcar- rier fading overrates the system performance.
文摘It is pointed out for the first time at the 18thCPC National Congress on November 8,2012 that"public diplomacy and cultural exchanges should be pushed forward",signifying integration of public diplomacy into China’s national strategy.Over the past year,China’s public diplomacy has made remarkable progress in institution-building,
