矿井巷道时频编码协作MC-CDMA伙伴选择与子载波分配

发布时间：2018-03-23 03:38

本文选题：矿井巷道　切入点：编码协作　出处：《煤炭学报》2014年10期 　论文类型：期刊论文

【摘要】：针对矿井巷道的带状结构特点,提出一种基于基站瞬时接收信噪比和用户位置的矿井巷道时频编码协作MC-CDMA无线传输协作伙伴选择策略,由基站为信道状况较差的用户选择协作伙伴。由于相邻子载波信道的相关性较大,为扩频支路分配相邻的子载波,可能会导致矿井MCCDMA一些扩频支路传输质量偏低,影响无线传输的性能。为此,提出了一种为矿井MC-CDMA每个扩频支路按固定间隔分配离散子载波的次优子载波轮转分配算法。在次优分配方案中,不考虑各子载波瞬时信道增益,可简化按用户各子载波瞬时信道状况分配子载波的最优子载波分配算法。仿真结果表明,采用所提出的协作伙伴选择策略以及子载波分配算法显著提高了矿井巷道时频编码协作MC-CDMA无线传输用户的信道容量和误码率性能,增强了矿井巷道时频编码协作MC-CDMA无线传输系统信道容量的鲁棒性和通信的可靠性。
[Abstract]:According to the characteristics of the belt structure of mine roadway, a cooperative partner selection strategy for time-frequency coding cooperative MC-CDMA wireless transmission in mine roadway based on instantaneous receiving SNR of base station and user position is proposed. Because of the high correlation of adjacent subcarrier channels, the distribution of adjacent sub-carriers for the spread spectrum branch may lead to the low transmission quality of some spread spectrum branches of mine MCCDMA. The performance of wireless transmission is affected. A suboptimal subcarrier rotation allocation algorithm is proposed, which allocates discrete subcarriers for each spread spectrum branch of mine MC-CDMA at fixed intervals. In the suboptimal allocation scheme, the instantaneous channel gain of each subcarrier is not considered. The optimal subcarrier allocation algorithm based on the instantaneous channel condition of each subcarrier can be simplified. The simulation results show that, The proposed cooperative partner selection strategy and subcarrier allocation algorithm can significantly improve the channel capacity and bit error rate (BER) performance of mine laneway time-frequency coded cooperative MC-CDMA wireless transmission users. The robustness of channel capacity and the reliability of communication in mine roadway time-frequency coding cooperative MC-CDMA wireless transmission system are enhanced.
【作者单位】：北京交通大学电子信息工程学院;
【分类号】：TN929.533

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