An adaptive modulation and coding (AMC) scheme integrated with multi-code transmission for high speed downlink packet access is presented and some modulation and coding scheme (MCS) selection criteria are proposed to ...An adaptive modulation and coding (AMC) scheme integrated with multi-code transmission for high speed downlink packet access is presented and some modulation and coding scheme (MCS) selection criteria are proposed to maximize single user data rates. Based on link-level performance analysis, the MCS selection criteria are proposed with the constraints of QoS requirement, modulation level, channel coding rate and the number of available channelization codes. By allowing multiple transmission parameters changing, these criteria make the scheme more flexible to time-varying mobile channel with comparatively low complexity through a look-up table method. The AMC scheme is sensitive to the changes of channel condition and can save the channelization codes in an applicable way by applying these criteria.展开更多
in this paper, a turbo Iterstive receiver structure with chip equalization is proposed for the 3G high-speed downllnk packet access （HSDPA） systems. The receiver equalizes the channel prior to the dlspreadlng and th...in this paper, a turbo Iterstive receiver structure with chip equalization is proposed for the 3G high-speed downllnk packet access （HSDPA） systems. The receiver equalizes the channel prior to the dlspreadlng and then performs two successive soft-output decisions, achieved by s soft-Input soft-output （SISO） multi-code detector and a SISO turbo decoder through an Iteratlve process. At each Iteration, extrinsic information Is extracted from detection and decoding stages and Is then used as a priori Information In the next Iteration, Just as In turbo decoding. Computer simulations show that the turbo Iterstlve receiver structure with chip equsllzation offers significant performance gain over the traditional receiver structure.展开更多
文摘An adaptive modulation and coding (AMC) scheme integrated with multi-code transmission for high speed downlink packet access is presented and some modulation and coding scheme (MCS) selection criteria are proposed to maximize single user data rates. Based on link-level performance analysis, the MCS selection criteria are proposed with the constraints of QoS requirement, modulation level, channel coding rate and the number of available channelization codes. By allowing multiple transmission parameters changing, these criteria make the scheme more flexible to time-varying mobile channel with comparatively low complexity through a look-up table method. The AMC scheme is sensitive to the changes of channel condition and can save the channelization codes in an applicable way by applying these criteria.
基金Supported by the National Natural Science Foundation of China (Grant No. 60496311)Program for New Century Excellent Talents in Uni-versity
文摘in this paper, a turbo Iterstive receiver structure with chip equalization is proposed for the 3G high-speed downllnk packet access （HSDPA） systems. The receiver equalizes the channel prior to the dlspreadlng and then performs two successive soft-output decisions, achieved by s soft-Input soft-output （SISO） multi-code detector and a SISO turbo decoder through an Iteratlve process. At each Iteration, extrinsic information Is extracted from detection and decoding stages and Is then used as a priori Information In the next Iteration, Just as In turbo decoding. Computer simulations show that the turbo Iterstlve receiver structure with chip equsllzation offers significant performance gain over the traditional receiver structure.
