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AWR2944EVM: DDMA移相频谱错乱问题

Part Number: AWR2944EVM
Other Parts Discussed in Thread: AWR2944, AWR2243

您好!

我们参考《基于AWR2944的汽车雷达DDMA波形设计》文档4.2.中的方式验证AWR2243的移相器精度。我们希望每一次以2pi / 16 步进进行移相,结果是错误的,但是以2pi / 8进行移相,结果却是正确的。

如上图所示,为移相2派 / 16的Heatmap, 静止目标不移相多普勒索引应该是257,移相32个格子的多普勒索引预期为257 - 32 = 225 ,测出来却是481

如上图所以,为移相4派/ 16的Heatmap,静止目标位置为257-32*2 = 193,符合预期

我们无法确定哪里出了问题,想请教有什么排查办法?

下面是我们的配置文件:

1.单天线移相2pi / 16

单天线移相2派除16.txt
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#
#cgu_mmwave_radar_config
#
#
#Global configuration
#Advanced frame test enable/disable; 1 - Advanced frame; 0 - Legacy frame
#Continuous mode test enable/disable; 1 - Enable; 0 - Disable
#Dynamic chirp test enable/disable; 1 - Enable; 0 - Disable; This should not be enabled if Advanced chirp test is enabled
#Dynamic profile test enable/disable; 1 - Enable; 0 - Disable
#Advanced chirp test enable/disable; 1 - Enable; 0 - Disable; The legacy chirp API is not required if this is enabled
#Firmware download enable/disable; 1 - Enable; 0 - Disable
#Calibration enable/disable; To perform calibration store/restore; 1 - Enable; 0 - Disable
#Calibration Store/Restore; If CalibEnable = 1, then whether to store/restore; 1 - Store; 0 - Restore
#Cascade device map; 1 - Master ; 2 - Slave1 ; 4 - Slave2 ; 8 - Slave3
#
LinkAdvanceFrameTest=1;
temp_enable=0;
temp_monitoringtime=1000;
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

2. 单天线移相 4pi / 16

单天线移相4派除16.txt
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#
#cgu_mmwave_radar_config
#
#
#Global configuration
#Advanced frame test enable/disable; 1 - Advanced frame; 0 - Legacy frame
#Continuous mode test enable/disable; 1 - Enable; 0 - Disable
#Dynamic chirp test enable/disable; 1 - Enable; 0 - Disable; This should not be enabled if Advanced chirp test is enabled
#Dynamic profile test enable/disable; 1 - Enable; 0 - Disable
#Advanced chirp test enable/disable; 1 - Enable; 0 - Disable; The legacy chirp API is not required if this is enabled
#Firmware download enable/disable; 1 - Enable; 0 - Disable
#Calibration enable/disable; To perform calibration store/restore; 1 - Enable; 0 - Disable
#Calibration Store/Restore; If CalibEnable = 1, then whether to store/restore; 1 - Store; 0 - Restore
#Cascade device map; 1 - Master ; 2 - Slave1 ; 4 - Slave2 ; 8 - Slave3
#
LinkAdvanceFrameTest=1;
temp_enable=0;
temp_monitoringtime=1000;
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

  • 你好,

    下面的信息可以在AWR2944的数据手册上找到:

    代码是否有使能初始化校准里的tx phase shifter的校准?

    是否有尝试使用角反进行tx phase shifter的校准后测试?

    Thanks,

    Chris