文章探讨了同步数字体系(Synchronous Digital Hierarchy,SDH)数字微波通信技术的关键特点,包括交叉极化干扰抵消(Cross-Polarisation Interference Counteracter,XPIC)技术、系统编码调制技术、时域与频域的自适应均衡处理技术以及网...文章探讨了同步数字体系(Synchronous Digital Hierarchy,SDH)数字微波通信技术的关键特点,包括交叉极化干扰抵消(Cross-Polarisation Interference Counteracter,XPIC)技术、系统编码调制技术、时域与频域的自适应均衡处理技术以及网管分集技术,分析了SDH数字微波通信在远程通信和灾难恢复方面的应用实践,实现了更高效率的数据传输和更强的信号稳定性。这些技术的应用不仅提升了通信质量和可靠性,而且拓宽了SDH数字微波通信在各领域的应用范围,标志着通信技术向更高层次的演进。展开更多
We investigate an adaptive cooperative protocol in a Two-Hop-Relay (THR) wireless system that combines the following: (1) adaptive relaying based on repetition coding; (2) single or two transmit antennas and one recei...We investigate an adaptive cooperative protocol in a Two-Hop-Relay (THR) wireless system that combines the following: (1) adaptive relaying based on repetition coding; (2) single or two transmit antennas and one receive antenna configurations for all nodes, each using high order constellation; (3) Bit-Interleaved Coded Modulation (BICM). We focus on a simple decoded relaying (i.e. no error correcting at a relay node) and simple signal quality thresholds for relaying. Then the impact of the two simple thresholds on the system performance is studied. Our results suggest that compared with the traditional scheme for direct transmission, the proposed scheme can increase average throughput in high spectral efficiency region with low implementa-tion-cost at the relay.展开更多
文摘文章探讨了同步数字体系(Synchronous Digital Hierarchy,SDH)数字微波通信技术的关键特点,包括交叉极化干扰抵消(Cross-Polarisation Interference Counteracter,XPIC)技术、系统编码调制技术、时域与频域的自适应均衡处理技术以及网管分集技术,分析了SDH数字微波通信在远程通信和灾难恢复方面的应用实践,实现了更高效率的数据传输和更强的信号稳定性。这些技术的应用不仅提升了通信质量和可靠性,而且拓宽了SDH数字微波通信在各领域的应用范围,标志着通信技术向更高层次的演进。
基金Supported by the National Natural Science Foundation of China (No.60496311) and partially supported by the B3G project (2003AA123310).
文摘We investigate an adaptive cooperative protocol in a Two-Hop-Relay (THR) wireless system that combines the following: (1) adaptive relaying based on repetition coding; (2) single or two transmit antennas and one receive antenna configurations for all nodes, each using high order constellation; (3) Bit-Interleaved Coded Modulation (BICM). We focus on a simple decoded relaying (i.e. no error correcting at a relay node) and simple signal quality thresholds for relaying. Then the impact of the two simple thresholds on the system performance is studied. Our results suggest that compared with the traditional scheme for direct transmission, the proposed scheme can increase average throughput in high spectral efficiency region with low implementa-tion-cost at the relay.
