以16-QAM为例讲解Demapper LLR计算 图3-75 802.11 16-QAM星座映射示意图 令S_{l}^{+} 和S_{l}^{-} 表示第 位为1和0的符号集,如16-QAM的星座图, S_{l}^{+} 和S_{l}^{-} 分别如下: 第l 位的对数似然比(LLR)定义为: 如果所有符号等概率出现,则LLR可以等价为: 通过观察可以发现 b_{0}...
LLR 与 demapper https://zhuanlan.zhihu.com/p/110920971 https://blog.csdn.net/weixin_42337489/article/details/128307214
The DCM demapping method includes: receiving DCM constellation sets; respectively calculating a one-dimensional log likelihood ratio (LLR) for each bit of each constellation set; and diversity combining the calculated one-dimensional LLR to calculate an output of an LLR....
The ntSOD Soft Output Demapper IP Core implements the LLR (Log Likelihood Ratio) algorithm to convert the received distorted modulated signal from its complex I, Q form to a bit stream. It identifies the actual transmitted symbol bits and assigns to each bit a level of confidence in the ...
the received signal has been distorted and there are positional errors on the constellation points. The ntSOD Soft Output Demapper IP Core implements the LLR (Log Likelihood Ratio) algorithm to convert the received distorted modulated signal from its complex I, Q form to a bit stream. It ident...
This Project is sponsored by The MITRE Corporation to develop an FPGA implementation of a Log Likelihood Ratio (LLR) soft decision demapper for a High Data Rate (HDR) modem. The main goal of this project is to add support for higher order modulation up to 32APSK for HDR and high bandwidt...
These decoders require a soft input, i.e., the logarithmic likelihood ratio (LLR) of the received bits with a typical quantization of 4 to 6 bits... I Ali,U Wasenmüller,N Wehn - 《Advances in Radio Science》 被引量: 0发表: 2015年 銉栥儹銉冦偗浼濋銈枫偣銉嗐儬銇 亰銇戙倠杌熷...
The DCM demapping method includes: receiving DCM constellation sets; respectively calculating a one-dimensional log likelihood ratio (LLR) for each bit of each constellation set; and diversity combining the calculated one-dimensional LLR to calculate an output of an LLR....
estimate, computing statistical information from the channel state information, determining a slope value based at least in part on the statistical information, calculating a log-likelihood ratio (LLR) value for the signal, and applying the slope value to the LLR value to obtain a weighted LLR ...
estimate, computing statistical information from the channel state information, determining a slope value based at least in part on the statistical information, calculating a log-likelihood ratio (LLR) value for the signal, and applying the slope value to the LLR value to obtain a weighted LLR ...