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massive mimo Fundamentals, Opportunities and Challenges
应用背景Massive multiuser MIMO (MISO):
◮ M ≫ K ≫ 1 (think 100 × 10 or 500 × 50)
◮ coherent, but simple, processing
◮ Potential to dramatically improve rate & reliability
◮ Potential to drastically scale down TX power
◮ Not only theory, at least one known testbed (64× ∼10)
关键技术
Massive MIMO Operation
Not enough resources for pilots & CSI feedback, so operate in TDD.
◮ On the uplink,
◮ acquire CSI from uplink pilots and/or blindly from data
◮ detect symbols
◮ M ≫ K ⇒ linear processing (MRC, ZF, MMSE) nearly optimal
◮ On the downlink,
◮ use CSI obtained on the uplink
◮ make necessary adjustments based on reciprocity calibration
◮ apply multiuser MIMO precoding
◮ simple precoders desirable (and very good!): MRT, ZF, MMSE, ...
◮ MRC/MRT operation
◮ intracell interference will appear as
- 2022-07-07 16:58:08下载
- 积分:1
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matlab 遗传算法求解旅行商问题
一个基于遗传算法求解旅行商问题的MATLAB程序,里面注释很清楚,可以运行,而且能够有实时更新显示。
- 2023-07-16 05:10:04下载
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科学计算和C程序集,有好多算法实现,很有用的有
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计算个人所得税的代码5522197 5522197 5522197
计算个人所得税的代码5522197 5522197 5522197-the calculation of personal income tax code 5522197 5522197 5522197 5522197
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计算自然对数底数e的程序 可选不同位数
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实对称 三对角阵的全部特征值及相应的特征向量的计算
实对称 三对角阵的全部特征值及相应的特征向量的计算-Symmetric diagonal matrix of all eigenvalues and eigenvectors corresponding calculation
- 2023-08-28 17:55:03下载
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一维双负介质的drude等效模型的防真程序.可以从输出图象中看出双负介质的基本特性...
一维双负介质的drude等效模型的防真程序.可以从输出图象中看出双负介质的基本特性-one-dimensional negative media drude Equivalent Model defense really procedures. Images can be output seen double negative dielectric characteristics of the basic
- 2022-06-28 05:15:40下载
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JEPG图像压缩中的颜色空间变换
这个压缩程序包含了RGB转YUV以及YUV转RGB 配套的程序,经过验证,色彩不在对比的情况下是难于分辨的。
- 2022-03-01 02:05:17下载
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2维小波变换经典程序
此示意程序用DWT实现二维小波变换
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此示意程序用DWT实现二维小波变换-wavelet transform two-dimensional classical procedures indicate this procedure using 2D DWT wavelet transform
- 2022-03-04 14:28:55下载
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关于全排列的C++实现
全排列算法采用分治递归的思想,举例来说就是,假设给出一串数字要求进行全排列,则先保持该数字串的第一位不动,其后的数字进行全排列,排列思想依旧,然后将该数字串的第一位和第二位置换,在进行全排列,以此类推,进行递归排列。
- 2023-08-11 10:40:03下载
- 积分:1