MATLAB System block 'sdruqpskrx_R2017b/QPSK Receiver/Frame Synchronizer' error occurred when invoking 'getOutputSizeImpl' method of 'FrameSynchronizer'. The error was thrown from ' 'C:\360\Final_exam_QPSK_Rx_2023\FrameSynchronizer.m' at line 221'. Caused by: Input length must be equal to or greater than output frame length. Component:Simulink | Category:Model error Error in port widths or dimensions. 'Output Port 2' of 'sdruqpskrx_R2017b/QPSK Receiver/Preamble Detector' is a matrix with a maximum size of [2253x1].

这个错误是由于在接收到的信号中，输入的长度小于输出帧的长度，导致的。在你的模型中，QPSK接收器的帧同步器模块出现了这个错误。具体来说，你需要检查一下输入信号的长度是否与输出帧的长度相等或更长。另外，也需要检查一下Preamble Detector模块的输出端口2是否为一个最大大小为[2253x1]的矩阵。你可以在代码的221行查看具体的错误信息。

相关问题

When I use updated Matlab2017b, I met:Can't load '/usr/local/MATLAB/R2017b/bin/glnxa64/libmwdastudio.so': /lib/x86_64-linux-gnu/libfontconfig.so.1: undefined symbol: FT_Done_MM_Var. How to solve the problem

The error message you encountered, "Can't load '/usr/local/MATLAB/R2017b/bin/glnxa64/libmwdastudio.so': /lib/x86_64-linux-gnu/libfontconfig.so.1: undefined symbol: FT_Done_MM_Var," suggests a problem with the fontconfig library used by MATLAB.

To solve this issue, you can try the following steps:

1. Update fontconfig library: First, try updating the fontconfig library on your system. You can do this by running the following command in your terminal:

   sudo apt-get update
   sudo apt-get install libfontconfig1

This will update the fontconfig library to the latest version available in your Linux distribution's package manager.

2. Check library paths: Ensure that the library path for fontconfig is correctly set in MATLAB. You can do this by running the following command in MATLAB's command window:

   getenv LD_LIBRARY_PATH

Make sure the output includes the correct path to the fontconfig library (e.g., `/usr/lib/x86_64-linux-gnu`).

3. Verify system compatibility: Verify that your system is compatible with MATLAB 2017b. Ensure that you are using a supported version of Linux and that all system requirements for MATLAB are met.

4. Reinstall MATLAB: If the above steps do not resolve the issue, you may need to reinstall MATLAB. Uninstall MATLAB completely and then reinstall it, making sure to follow all installation instructions and prompts carefully.

If the problem persists after trying these steps, it might be helpful to contact MathWorks support for further assistance, as they can provide more specific guidance tailored to your system and setup.

下载 mf0_mi_win64_1501203117.enc 时检测到以下错误: Server returned HTTP response code: 502 for URL: http://ssd.mathworks.com/supportfiles/downloads/R2017b/deployment_files/R2017b/components/mf0_mi_win64_1501203117.enc 是否要重新尝试下载 mf0_mi_win64_1501203117.enc?如果按“否”，安装程序将退出而不完成安装。

这个错误提示表明您在下载 mf0_mi_win64_1501203117.enc 时遇到了服务器错误（HTTP 502）。这可能是由于服务器过载或维护而导致的临时问题。

您可以尝试重新下载 mf0_mi_win64_1501203117.enc 来解决这个问题。如果重新下载仍然失败，您可以稍后再试，或者联系 MathWorks 支持团队获取更多帮助。