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您好,我正在尝试解调来自EnodeB的真实LTE信号。
我注意到的是每个通道都需要不同的参数。 例如,对于PBCH信道,我们需要2个与其他端口相反的C-RS端口(PSS / SSS),这些端口仅用一个1 CRS端口解调。 移动平均滤波器和同步类型的情况相同,我必须在选择和取消选择参数之间进行选择。 运营商确认没有信道通过MIMO发送,因此物理信道可能有不同的解调参数吗? 另外,我可以对“分析开始边界”选项有更多解释,因为一些信道可以用诸如PDCCH的子帧很好地解调。 软件提供的帮助是不够的,我不明白为什么。 谢谢 以上来自于谷歌翻译 以下为原文 Hello, I'm trying to demodulate a real LTE signal from an EnodeB. What i have noticed is that every channel needs differents parameters. For example, for the PBCH channel, we need 2 C-RS ports contrary to the others (PSS/SSS) which are demodulated with only one 1 CRS port. It is the same case for the moving averaging filter and sync type where i have to choose between selecting and deselecting the parameters. The operator confirms that no channel is sended with MIMO, so is it possible to have different demodulation parameters for physical channels? In addition, can i have more explanation for the "analysis Start Boundary" option because some channels are well demodulated with subframe such as PDCCH. The Help provided with the software is not sufficient and i don't understand why. Thank you |
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嗨 - 谢谢你提出详细的技术问题。
我们将需要您的eNB信号的更多详细信息,以便我们可以告诉您如何配置我们的软件。 如果您能提供您的联系方式和公司,那么我们可以请求我们的当地支持工程师给您打电话寻求指导。 通常,如果您的eNB LTE信号是完全信道编码的,您可以使用“PDCCH解码”作为检测类型,我们的软件将检测每个信道的相对功率并计算正确的EVM结果。 在MIMO传输下,您可能需要调整一些参数,这些参数取决于您同时测量的天线端口数量,以及您用于测试的硬件。 关于“分析起始边界”,它确定结果长度的数据的开始时间。 例如,如果选择Frame,我们的SW将开始从每个信号帧捕获数据; 如果选择子帧,SW将从下一个子帧捕获数据。 随附的是它的解释。 我希望这可以帮到你 - 以上来自于谷歌翻译 以下为原文 Hi - Thank you for your detailed technical question. We will need more details of your eNB signal so we can tell how to configure our software. It would be helpful if you can provide your contact and company then we can ask our local support engineer to call you for guidance. Generally, if your eNB LTE signal is fully channel coded, you can use “PDCCH Decoded” as the detect type and our software will detect the relative power of each channel and calculate correct EVM result. Under MIMO transmission, you may need to adjust some parameters that depend on how many antenna ports you are measuring at the same time, and which hardware you are using for the test. Regarding to “Analysis Start Boundary”, it determines the start time of data for our result length. For example, if you choose Frame, our SW will begin capture data from every frame of signal; if you choose subframe, SW will capture data from next subframe. Attached is the explanation for it. I hope this was helpful - 附件 |
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醉狼工作室 发表于 2019-1-17 15:32 嗨,非常感谢你。 实际上,我还是一名学生,我正在研究我在法国的论文(INSA)。 我无法访问eNB,但我知道它是10MHz带宽的SISO传输模式。 可能,该小区上没有多少用户,因为它仍然是LTE实验的测试。 如何通过私信发送给我联系人? 以上来自于谷歌翻译 以下为原文 Hi, thank you very much. Actually, i'm still a student and i'm working on my thesis in France (INSA). I don't have access to the eNB but i know it's a SISO transmission mode on 10MHz bandwith. Probably, there are no many users on the cell because it still a test for LTE experimentation. How can i send you my contact on private message? |
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