Subcarrier Allocation for OFDM With Index Modulation
Subcarrier Allocation for OFDM With Index Modulation
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DOI：
10.1109/lcomm.2016.2560171
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发表时间：
2016-04
期刊：
影响因子：
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通讯作者：
Q. Ma;Yue Xiao;L. Dan;Ping Yang;Lan Peng;Shaoqian Li
中科院分区：
文献类型：
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作者：
Q. Ma;Yue Xiao;L. Dan;Ping Yang;Lan Peng;Shaoqian Li
提出了一种改进正交频分复用（OFDM）系统性能的子载波分配（SA）方案。因此，在这封信中，我们将其应用扩展到带有索引调制（OFDM- im）系统的OFDM。为了提高误码率（BER）性能，首先提出了一种基于穷举搜索的平均最小欧氏距离最大化的最优SA算法。此外，为了更好地权衡所施加的复杂性和所获得的误码率性能，我们提出了一种简化的SA算法，通过对子载波的信道增益进行排序。仿真结果表明，与传统的OFDM-IM系统相比，在SA算法的帮助下，系统性能得到了显著提高。
A subcarrier allocation (SA) scheme was demonstrated to provide useful performance improvements for orthogonal frequency division multiplexing (OFDM) systems. Hence, in this letter, we extend its employment to OFDM with index modulation (OFDM-IM) systems. For the sake of improving the bit error rate (BER) performance, an optimal SA algorithm is first proposed by maximizing the average minimum Euclidean distance based on exhaustive search. Furthermore, for striking a better tradeoff between the complexity imposed and the BER performance attained, we propose a simplified SA algorithm by sorting the channel gains of the subcarriers. Simulation results show that with the aid of SA algorithms, significant performance gains can be achieved over conventional OFDM-IM systems.