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Virtual Spatial Channel Number and Index Modulation
Wireless Communications and Mobile Computing ( IF 2.146 ) Pub Date : 2021-09-13 , DOI: 10.1155/2021/2982226
Zahid Iqbal 1 , Fei Ji 1 , Yun Liu 2
Affiliation  

This paper proposes a novel precoding-aided and efficient data transmission scheme called virtual spatial channel number and index modulation (VS-CNIM), which conveys extra data by changing both the number and index of active virtual parallel channels of multiple-input multiple-output (MIMO) channels, obtained through the singular value decomposition (SVD) in each time slot. Unlike the conventional virtual spatial modulation (VSM), where extra data bits are transmitted only using index of active virtual parallel channels, the VS-CNIM scheme, depending on incoming information bits, transmits extra bits utilizing both the number and indices of active parallel channels along the bits carried by -ary constellation symbols. Therefore, VS-CNIM provides significantly superior spectral efficiency (SE) compared to VSM. Considering the influence of imperfect channel estimation, a closed-form upper bound is derived on average bit error probability (ABEP). The asymptotic performance is also analyzed, which gives the coding gain and diversity order and describes error floor under the consideration of perfect and imperfect channel estimation, respectively. Monte Carlo simulations exhibit that the VS-CNIM scheme achieves considerably better error performance and high SE than precoding-aided SM (PSM) and VSM schemes.

中文翻译:

虚拟空间通道数和索引调制

本文提出了一种新的预编码辅助且高效的数据传输方案,称为虚拟空间通道数和索引调制 (VS-CNIM),它通过改变多输入多输出的活动虚拟并行通道的数量和索引来传送额外数据。 (MIMO) 信道,通过每个时隙中的奇异值分解 (SVD) 获得。与仅使用活动虚拟并行通道索引传输额外数据位的传统虚拟空间调制 (VSM) 不同,VS-CNIM 方案根据传入信息位使用活动并行通道的数量和索引传输额外位沿着所携带的位-ary 星座符号。因此,与 VSM 相比,VS-CNIM 提供了显着优越的频谱效率 (SE)。考虑到不完善信道估计的影响,推导出平均误码率(ABEP)的封闭形式上限。还分析了渐近性能,分别给出了编码增益和分集阶数,并分别描述了考虑完美和非完美信道估计的误差基底。Monte Carlo 模拟表明,VS-CNIM 方案比预编码辅助 SM (PSM) 和 VSM 方案实现了明显更好的错误性能和高 SE。
更新日期:2021-09-13
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