Performance analysis and sub-carriers power allocation for MC-QCSK
Performance analysis and sub-carriers power allocation for MC-QCSK
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DOI：
10.1109/wcsp.2015.7341173
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发表时间：
2015-10
期刊：
影响因子：
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通讯作者：
Jiyu Bao;Weikai Xu;L. Wang;Tingting Huang
中科院分区：
文献类型：
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作者：
Jiyu Bao;Weikai Xu;L. Wang;Tingting Huang
提出了一种多载波正交混沌键控（MC-QCSK）调制方式。它综合了QCSK和多载波差分混沌键控（MC-DCSK）的优点。与MC-DCSK相比，MC-QCSK的能量效率和频谱效率都有所提高。首先推导了MC-QCSK的误码率表达式。根据误码率表达式，研究了MC-QCSK的子载波功率分配问题。利用凸优化方法得到了参考子载波和信息子载波的最优功率比。数值和仿真结果表明，当子载波数较大时，最优功率分配方案具有可观的BER性能增益。
In this paper, a Multi-Carrier Quadrature Chaos Shift Keying (MC-QCSK) modulation is presented. It harvests the merits of QCSK and Multi-Carrier Differential Chaos Shift Keying (MC-DCSK). Energy efficiency and spectrum efficiency of MC-QCSK are improved relative to MC-DCSK. The Bit Error Rate (BER) expression of MC-QCSK is derived firstly. According to the BER expression, the sub-carriers power allocation of MC-QCSK is investigated. The optimal power ratio between reference and information sub-carriers is derived by convex optimization. Numerical and simulation results highlight the considerable BER performance gain of the optimal power allocations scenario when the number of sub-carriers is large.