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提出了一种矿井巷道时频编码协作MC-CDMA上行子载波功率控制算法,利用接收端反馈给发送端的每个MC-CDMA子载波对应信道增益的估计值,为每个扩频支路按一定比例去除信道状况较差的一些子载波,从而保证发射功率能有效用于每个扩频支路中信道状况较好的部分子载波.针对MC-CDMA扩频序列长度限制矿井巷道时频编码协作MC-CDMA系统用户容量的问题,提出了一种基于迭代译码的矿井巷道时频编码协作MC-CDMA上行用户容量扩充算法.仿真结果表明:采用所提出的矿井巷道时频编码协作MCCDMA上行子载波功率控制算法,显著提高了系统中用户的误码率性能;采用所提出的矿井巷道时频编码协作MC-CDMA上行用户容量扩充算法,能有效实现系统扩容.
A control algorithm for MC-CDMA uplink sub-carrier power in time-frequency coding cooperative mine roadway is proposed. By using the estimation of the corresponding channel gain of each MC-CDMA sub-carrier fed back to the transmitting end, So as to ensure that the transmit power can be effectively used for a part of subcarriers with better channel conditions in each spread spectrum branch. In view of the limitation of the length of MC-CDMA spread spectrum sequences, MC-CDMA system user capacity, this paper proposes an algorithm based on iterative decoding of coal mine roadway time-frequency coding cooperation MC-CDMA uplink user capacity expansion.The simulation results show that: using the proposed mine roadway time-frequency coding collaboration MCCDMA uplink sub- Carrier power control algorithm, which significantly improves the BER performance of users in the system. By using the proposed algorithm of MC-CDMA uplink user capacity expansion in time and frequency coding of mine tunnels, the capacity expansion of the system can be effectively realized.