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我一直在用 RFCat 进行 SDR 项目的工作。简而言之，我正在对 sub GHz 无线电协议进行逆向工程。我已经弄清楚了协议，并且能够使用在另一个 SDR 上嗅探的数据包（我知道 YS1 在技术上不是 SDR）并使用 Inspectrum 解码来欺骗从我的 Yardstick One 传输的带有 RFCat 的接收器。但是，当我使用真正的遥控器或另一个 SDR 发射器发送相同的数据包时，我无法使用 RFCat 中的 YS1 嗅探它们，使用与我成功传输相同的设置。接收是否可能需要不同的设置？（除了将其置于 RX 模式之外）这是 d.printRadioConfig() 的打印输出：

== Hardware ==
Dongle:              YARDSTICKONE
Firmware rev:        0616
Compiler:            SDCCv350
Bootloader:          CC-Bootloader

== Software ==
rflib rev:           616

== Frequency Configuration ==
Frequency:           916999877.929688 hz (0x263555)
Channel:             0
Intermediate freq:   281250 hz
Frequency Offset:    0 +/-
Est. Freq Offset:    0

== Modem Configuration ==
Modulation:          2FSK
DRate:               151977.539062 hz
ChanBW:              93750.000000 hz
DEVIATION:           234375.000000 hz
Sync Mode:           16 of 16 bits must match
Min TX Preamble:     3 bytes
Chan Spacing:        199951.171875 hz
BSLimit:             No data rate offset compensation performed
DC Filter:           enabled
Manchester Encoding: disabled
Fwd Err Correct:     disabled

== Packet Configuration ==
Sync Word:           0x8585
Packet Length:       11
Length Config:       Fixed Packet Mode
Configured Address:  0x0
Preamble Quality Threshold: 4 * 2
Append Status:       No
Rcvd Packet Check:   No address check
Data Whitening:      off
Packet Format:       Normal mode
CRC:                 disabled

== AES Crypto Configuration ==
AES Mode:            CBC - Cipher Block Chaining
Crypt RF Input:      off
Crypt RF Output:     off

== Radio Test Signal Configuration ==
TEST2:               0x88
TEST1:               0x31
TEST0:               0x9
VCO_SEL_CAL_EN:      0x0

== Radio State ==
     MARCSTATE:      MARC_STATE_IDLE (1)
     DONGLE RESPONDING:  mode :d, last error# 0

== Client State ==
========================================================================================================================
     client thread cycles:      105/55
     client errored cycles:     0
     recv_queue:                (0 bytes) ''
     trash:                     (3 blobs) "[128, 142, (1619706506.761202, '')]"
     recv_mbox                  (2 keys)  "['0x42', '0xff']"
       app 0x42 (2 records)
             [0x2]    (0 frames)  "[]"
             [0x7]    (0 frames)  "[]"

       app 0xff (6 records)
             [0x80]    (0 frames)  "[]"
             [0x81]    (0 frames)  "[]"
             [0x82]    (0 frames)  "[]"
             [0x86]    (0 frames)  "[]"
             [0x88]    (0 frames)  "[]"
             [0x89]    (0 frames)  "[]"

（PS如果这个问题有什么不妥之处，长期访客，第一次发帖，请见谅）

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1 回答 1

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尝试加宽接收器通道滤波器带宽。您的 FSK 偏差设置为 234.375KHz，但您的通道滤波器设置为 93.750kHz，假设偏差是正确的，那么您的滤波器设置会阻止信号到达接收器。您可以使用 将其增加到最大值d.setMdmChanBW(750000)。在 C1111Fx 数据表https://www.ti.com/lit/ds/swrs033h/swrs033h.pdf的第 191 页上，有更多关于如何正确设置的详细信息。

于 2021-09-03T19:22:07.663 回答