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CC1101信道串扰问题

Long King
Intellectual 365 points
Other Parts Discussed in Thread: CC1101

各位大神，我在使用CC1101的时候，遇到如下问题，我购买的是模块，并非自己设计，所有参数，使用smart rf生成，参数如下：

base frequency=432.9999817mhz，data rate=38.3835kbaud，其他参数均根据smart rf生成，因为smart rf中的cc1101里expert mode没有433选择，所以使用了generic 868Mhz的参数，在generic 868Mhz里选择38.4，Optimized for sensitivity，然后base frequency改成432.9999817，Tx Power改成10，其他不改。

现在发现，信道串扰很严重：

40信道(carrier frequency=440.997864Mhz)会串扰0信道(432.9999817Mhz)，

80信道(carrier frequency=448.995911)会串扰40信道(440.997864Mhz)，

(但是80信道和0信道却不会串扰)。

104信道(carrier frequency=453.794739Mhz)会串扰64信道(carrier frequency=445.796692)，

当然还有其他信道串扰情况，无法全部测试。

以上串扰现象均在channel spacing=199.951172KHz，RX filter BW=101.562500，如果我将Channel spacing更改为333.251953，则不会出现串扰现象，请大神帮助！！感谢感谢！

  • 0
    Prodigy 20 points

    你好 问题解决了吗   我也遇到类似问题

  • 0
    TI__Mastermind 26727 points

    Long，

    你把所有的配置都发上来吧，smartrf sdudio截图就好。

    我看看你channel space deviation 等。

    BR. AZ

  • 0 回复 清流
    TI__Mastermind 26727 points

    图片呢？我就看到了一个 点。

    BR. AZ

  • 0 回复 Albin Zhang
    Intellectual 365 points

    呵呵，谢谢啊，尽然还有人关注这个问题啊，图如下：

    参数如下：

    // Rf settings for CC1101
    RF_SETTINGS code rfSettings = {
    0x01, // IOCFG2 GDO2 Output Pin Configuration
    0x2E, // IOCFG1 GDO1 Output Pin Configuration
    0x0C, // IOCFG0 GDO0 Output Pin Configuration
    0x44, // FIFOTHR RX FIFO and TX FIFO Thresholds
    0xD3, // SYNC1 Sync Word, High Byte
    0x91, // SYNC0 Sync Word, Low Byte
    0xFF, // PKTLEN Packet Length
    0x04, // PKTCTRL1 Packet Automation Control
    0x52, // PKTCTRL0 Packet Automation Control
    0x00, // ADDR Device Address
    0x00, // CHANNR Channel Number
    0x06, // FSCTRL1 Frequency Synthesizer Control
    0x00, // FSCTRL0 Frequency Synthesizer Control
    0x10, // FREQ2 Frequency Control Word, High Byte
    0xA7, // FREQ1 Frequency Control Word, Middle Byte
    0x62, // FREQ0 Frequency Control Word, Low Byte
    0xCA, // MDMCFG4 Modem Configuration
    0x83, // MDMCFG3 Modem Configuration
    0x10, // MDMCFG2 Modem Configuration
    0x22, // MDMCFG1 Modem Configuration
    0xF8, // MDMCFG0 Modem Configuration
    0x35, // DEVIATN Modem Deviation Setting
    0x07, // MCSM2 Main Radio Control State Machine Configuration
    0x30, // MCSM1 Main Radio Control State Machine Configuration
    0x18, // MCSM0 Main Radio Control State Machine Configuration
    0x16, // FOCCFG Frequency Offset Compensation Configuration
    0x6C, // BSCFG Bit Synchronization Configuration
    0x43, // AGCCTRL2 AGC Control
    0x40, // AGCCTRL1 AGC Control
    0x91, // AGCCTRL0 AGC Control
    0x87, // WOREVT1 High Byte Event0 Timeout
    0x6B, // WOREVT0 Low Byte Event0 Timeout
    0xFB, // WORCTRL Wake On Radio Control
    0x56, // FREND1 Front End RX Configuration
    0x10, // FREND0 Front End TX Configuration
    0xE9, // FSCAL3 Frequency Synthesizer Calibration
    0x2A, // FSCAL2 Frequency Synthesizer Calibration
    0x00, // FSCAL1 Frequency Synthesizer Calibration
    0x1F, // FSCAL0 Frequency Synthesizer Calibration
    0x41, // RCCTRL1 RC Oscillator Configuration
    0x00, // RCCTRL0 RC Oscillator Configuration
    0x59, // FSTEST Frequency Synthesizer Calibration Control
    0x7F, // PTEST Production Test
    0x3F, // AGCTEST AGC Test
    0x81, // TEST2 Various Test Settings
    0x35, // TEST1 Various Test Settings
    0x09, // TEST0 Various Test Settings
    0x00, // PARTNUM Chip ID
    0x04, // VERSION Chip ID
    0x00, // FREQEST Frequency Offset Estimate from Demodulator
    0x00, // LQI Demodulator Estimate for Link Quality
    0x00, // RSSI Received Signal Strength Indication
    0x00, // MARCSTATE Main Radio Control State Machine State
    0x00, // WORTIME1 High Byte of WOR Time
    0x00, // WORTIME0 Low Byte of WOR Time
    0x00, // PKTSTATUS Current GDOx Status and Packet Status
    0x00, // VCO_VC_DAC Current Setting from PLL Calibration Module
    0x00, // TXBYTES Underflow and Number of Bytes
    0x00, // RXBYTES Overflow and Number of Bytes
    0x00, // RCCTRL1_STATUS Last RC Oscillator Calibration Result
    0x00, // RCCTRL0_STATUS Last RC Oscillator Calibration Result
    };