本文選題：礦井巷道　切入點(diǎn)：編碼協(xié)作　出處：《煤炭學(xué)報(bào)》2014年10期 　論文類型：期刊論文

【摘要】：針對礦井巷道的帶狀結(jié)構(gòu)特點(diǎn),提出一種基于基站瞬時(shí)接收信噪比和用戶位置的礦井巷道時(shí)頻編碼協(xié)作MC-CDMA無線傳輸協(xié)作伙伴選擇策略,由基站為信道狀況較差的用戶選擇協(xié)作伙伴。由于相鄰子載波信道的相關(guān)性較大,為擴(kuò)頻支路分配相鄰的子載波,可能會導(dǎo)致礦井MCCDMA一些擴(kuò)頻支路傳輸質(zhì)量偏低,影響無線傳輸?shù)男阅�。為�?提出了一種為礦井MC-CDMA每個(gè)擴(kuò)頻支路按固定間隔分配離散子載波的次優(yōu)子載波輪轉(zhuǎn)分配算法。在次優(yōu)分配方案中,不考慮各子載波瞬時(shí)信道增益,可簡化按用戶各子載波瞬時(shí)信道狀況分配子載波的最優(yōu)子載波分配算法。仿真結(jié)果表明,采用所提出的協(xié)作伙伴選擇策略以及子載波分配算法顯著提高了礦井巷道時(shí)頻編碼協(xié)作MC-CDMA無線傳輸用戶的信道容量和誤碼率性能,增強(qiáng)了礦井巷道時(shí)頻編碼協(xié)作MC-CDMA無線傳輸系統(tǒng)信道容量的魯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.
【作者單位】： 北京交通大學(xué)電子信息工程學(xué)院;
【分類號】：TN929.533

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本文編號：1651753