The throughput performance of modulation and coding schemes （MCS） selection with channel quality estimation errors （CQEE） is analyzed for high-speed downlink packet access （HSDPA）. To reduce the loss of throughp...The throughput performance of modulation and coding schemes （MCS） selection with channel quality estimation errors （CQEE） is analyzed for high-speed downlink packet access （HSDPA）. To reduce the loss of throughput caused by CQEE, the robust MCS selection method and adaptive MCS switching scheme are proposed. In addition, automatic repeat request （ARQ） scheme is used to improve the block error rate （BLER） performance. Simulation results show that the proposed methods decrease the throughput loss resulted from CQEE efficiently and BLER performance gets better with ARQ scheme.展开更多
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
总结自适应调制编码技术(Adaptive Modulation and Coding,AMC)中现有的方法对AMC技术的深入研究具有重要意义。梳理自适应调制编码技术的发展及主要应用,对AMC技术中涉及的信道状态估计、MCS(Modulation and Coding Scheme)切换问题中...总结自适应调制编码技术(Adaptive Modulation and Coding,AMC)中现有的方法对AMC技术的深入研究具有重要意义。梳理自适应调制编码技术的发展及主要应用,对AMC技术中涉及的信道状态估计、MCS(Modulation and Coding Scheme)切换问题中已有算法进行归纳总结,讨论了各自的优缺点,在已有结论的基础上分析了ACM技术的发展趋势。展开更多
文摘The throughput performance of modulation and coding schemes （MCS） selection with channel quality estimation errors （CQEE） is analyzed for high-speed downlink packet access （HSDPA）. To reduce the loss of throughput caused by CQEE, the robust MCS selection method and adaptive MCS switching scheme are proposed. In addition, automatic repeat request （ARQ） scheme is used to improve the block error rate （BLER） performance. Simulation results show that the proposed methods decrease the throughput loss resulted from CQEE efficiently and BLER performance gets better with ARQ scheme.
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.
文摘总结自适应调制编码技术(Adaptive Modulation and Coding,AMC)中现有的方法对AMC技术的深入研究具有重要意义。梳理自适应调制编码技术的发展及主要应用,对AMC技术中涉及的信道状态估计、MCS(Modulation and Coding Scheme)切换问题中已有算法进行归纳总结,讨论了各自的优缺点,在已有结论的基础上分析了ACM技术的发展趋势。
