GnuRadio 上的 GMSK 传输问题
GMSK transmission issues on GnuRadio
我正在尝试实施相当简单的方案，将数据从一个 sdr 板传输到另一个。我正在使用 GnuRadio 3.7.14，我的配套方案如下所示
源文件是一个 96 字节长的二进制文件，看起来像这样
00000000 00 00 00 ff aa aa aa aa aa aa aa aa aa aa aa aa |................|
00000010 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00000020 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00000030 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00000040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000060
在输出时，我预计在一些噪音之后会重复输入模式（可能有一些错误），但实际上它看起来像这样
00004610 00 00 00 1f f5 55 55 55 55 55 55 55 55 55 55 55 |.....UUUUUUUUUUU|
00004620 55 55 55 55 55 55 55 55 53 63 eb ea aa a8 aa aa |UUUUUUUUSc......|
00004630 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004640 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004650 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004660 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 88 |................|
00004670 80 00 00 7f d5 55 55 55 55 55 55 55 55 55 55 55 |.....UUUUUUUUUUU|
00004680 55 55 55 55 55 55 55 0d 0b a2 aa aa aa aa aa aa |UUUUUUU.........|
00004690 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
000046a0 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
000046b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000046c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000046d0 00 00 01 ff 55 55 55 55 55 55 55 55 55 55 55 51 |....UUUUUUUUUUUQ|
000046e0 15 61 55 31 75 fc aa aa aa aa aa aa aa aa aa aa |.aU1u...........|
000046f0 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004700 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa a8 |................|
00004710 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004720 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004730 00 00 03 fe aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004740 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004750 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004760 aa aa 9a ac 6e 8a db 59 3c ae aa b8 aa ac aa a8 |....n..Y<.......|
00004770 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004780 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004790 00 00 07 fd 55 55 55 55 55 55 55 55 55 55 55 55 |....UUUUUUUUUUUU|
000047a0 55 55 55 55 55 55 55 55 55 45 55 55 55 55 5b 55 |UUUUUUUUUEUUUU[U|
000047b0 28 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |(...............|
000047c0 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa a0 |................|
000047d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000047e0 00 00 00 00 00 00 00 00 00 00 00 00 01 40 20 00 |.............@ .|
000047f0 00 00 1f f5 55 55 55 55 55 55 55 55 55 55 55 55 |....UUUUUUUUUUUU|
00004800 55 55 55 55 55 55 55 55 55 55 55 55 55 64 ab aa |UUUUUUUUUUUUUd..|
00004810 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004820 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa 80 |................|
00004830 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004840 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004850 00 00 7f d5 55 55 55 55 55 55 55 55 55 55 55 55 |....UUUUUUUUUUUU|
00004860 55 55 55 55 55 55 55 6e aa aa aa aa aa aa aa aa |UUUUUUUn........|
00004870 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004880 aa aa aa aa aa aa aa aa aa aa aa a8 ab b3 54 00 |..............T.|
00004890 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000048a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000048b0 00 03 fe aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
000048c0 aa aa aa aa aa aa a8 5d 15 55 55 55 55 55 55 55 |.......].UUUUUUU|
000048d0 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 |UUUUUUUUUUUUUUUU|
000048e0 55 55 55 55 55 55 55 55 55 55 41 56 b6 aa a0 00 |UUUUUUUUUUAV....|
000048f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004900 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
我手动获取了这段输出文件，所以它与输入对齐。
所以，在这里我看到两个问题（我认为有一个原因）：
- 字节 0xAA (10101010b) 在消息的某些部分切换到 0x55(01010101b)，反之亦然
- 消息的开头是"sliding"，字符串47f0和4610之间有8位的差异
明显的原因是接收方获得的位数与发送方发送的位数不同，但我怀疑，究竟是什么导致了这种行为？我如何调试它以找出问题所在？
关于我的设置的几句话：我使用 3 个板，一个 USRP B210，一个 Limesdr-USB 和一个 Limesdr-Mini。我至少在 4 种不同的组合中尝试了这个实验，包括从板发送到它自己，并且每次都收到相同的结果。这些板似乎没问题，它们成功地接收了调频广播和 transmit/receive 彼此的调频声音。
谢谢！
实际上我发现了类似的问题，那里给出的食谱也对我有用。
我正在尝试实施相当简单的方案，将数据从一个 sdr 板传输到另一个。我正在使用 GnuRadio 3.7.14，我的配套方案如下所示
源文件是一个 96 字节长的二进制文件，看起来像这样
00000000 00 00 00 ff aa aa aa aa aa aa aa aa aa aa aa aa |................|
00000010 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00000020 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00000030 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00000040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000060
在输出时，我预计在一些噪音之后会重复输入模式（可能有一些错误），但实际上它看起来像这样
00004610 00 00 00 1f f5 55 55 55 55 55 55 55 55 55 55 55 |.....UUUUUUUUUUU|
00004620 55 55 55 55 55 55 55 55 53 63 eb ea aa a8 aa aa |UUUUUUUUSc......|
00004630 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004640 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004650 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004660 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 88 |................|
00004670 80 00 00 7f d5 55 55 55 55 55 55 55 55 55 55 55 |.....UUUUUUUUUUU|
00004680 55 55 55 55 55 55 55 0d 0b a2 aa aa aa aa aa aa |UUUUUUU.........|
00004690 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
000046a0 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
000046b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000046c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000046d0 00 00 01 ff 55 55 55 55 55 55 55 55 55 55 55 51 |....UUUUUUUUUUUQ|
000046e0 15 61 55 31 75 fc aa aa aa aa aa aa aa aa aa aa |.aU1u...........|
000046f0 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004700 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa a8 |................|
00004710 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004720 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004730 00 00 03 fe aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004740 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004750 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004760 aa aa 9a ac 6e 8a db 59 3c ae aa b8 aa ac aa a8 |....n..Y<.......|
00004770 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004780 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004790 00 00 07 fd 55 55 55 55 55 55 55 55 55 55 55 55 |....UUUUUUUUUUUU|
000047a0 55 55 55 55 55 55 55 55 55 45 55 55 55 55 5b 55 |UUUUUUUUUEUUUU[U|
000047b0 28 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |(...............|
000047c0 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa a0 |................|
000047d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000047e0 00 00 00 00 00 00 00 00 00 00 00 00 01 40 20 00 |.............@ .|
000047f0 00 00 1f f5 55 55 55 55 55 55 55 55 55 55 55 55 |....UUUUUUUUUUUU|
00004800 55 55 55 55 55 55 55 55 55 55 55 55 55 64 ab aa |UUUUUUUUUUUUUd..|
00004810 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004820 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa 80 |................|
00004830 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004840 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004850 00 00 7f d5 55 55 55 55 55 55 55 55 55 55 55 55 |....UUUUUUUUUUUU|
00004860 55 55 55 55 55 55 55 6e aa aa aa aa aa aa aa aa |UUUUUUUn........|
00004870 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
00004880 aa aa aa aa aa aa aa aa aa aa aa a8 ab b3 54 00 |..............T.|
00004890 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000048a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000048b0 00 03 fe aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
000048c0 aa aa aa aa aa aa a8 5d 15 55 55 55 55 55 55 55 |.......].UUUUUUU|
000048d0 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 |UUUUUUUUUUUUUUUU|
000048e0 55 55 55 55 55 55 55 55 55 55 41 56 b6 aa a0 00 |UUUUUUUUUUAV....|
000048f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00004900 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
我手动获取了这段输出文件，所以它与输入对齐。 所以，在这里我看到两个问题（我认为有一个原因）：
- 字节 0xAA (10101010b) 在消息的某些部分切换到 0x55(01010101b)，反之亦然
- 消息的开头是"sliding"，字符串47f0和4610之间有8位的差异
明显的原因是接收方获得的位数与发送方发送的位数不同，但我怀疑，究竟是什么导致了这种行为？我如何调试它以找出问题所在？
关于我的设置的几句话：我使用 3 个板，一个 USRP B210，一个 Limesdr-USB 和一个 Limesdr-Mini。我至少在 4 种不同的组合中尝试了这个实验，包括从板发送到它自己，并且每次都收到相同的结果。这些板似乎没问题，它们成功地接收了调频广播和 transmit/receive 彼此的调频声音。
谢谢！
实际上我发现了类似的问题，那里给出的食谱也对我有用。