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【求助】ft8_lib中kiss_fftr快速傅里叶变换后如何得到码元? #82

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liuaifu opened this issue Oct 20, 2023 · 2 comments
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@liuaifu
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liuaifu commented Oct 20, 2023

国内可能就这里对FT8_lib最熟悉了,看了好长时间,快速傅里叶变换后云里雾里,还用到科斯塔斯环,可否给讲一下kiss_fftr后如何解调得到码元?也欢迎老外帮忙讲解一下。

The person most familiar with FT8_lib in China may be here. After looking at it for a long time, it is foggy after fast Fourier transform, and Costas loop is also used. Can you tell me how to get the channel symbols or FT8 Bits after kiss_fftr? Foreigners are also welcome to help explain.

@liuaifu
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liuaifu commented Oct 23, 2023

基本上搞清楚了。

@liuaifu liuaifu closed this as completed Oct 23, 2023
@bg7yoz
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bg7yoz commented Oct 23, 2023

粗略来说,大概有一下几步:
1.快速傅立叶变换,得到频域数据。
2.同步。根据同步符号(开始(0-7)、中间(36-43)、结尾(72-79)科斯塔阵列)确定信号的位置(频率和时间偏移)。
3.基于LDPC解码,做CRC校验,解包。

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