Hi,
I have some problems with enable MIMO on WL1837MOD.
Following some instructions it seems that for such configuration only "numbers_of_assembled_antennas_2.4" should be set to 2 and it is.
Debug session shows that AP START_ROLE is executed with proper values. (visible also in FW logs)
With some default radio parameters we tried to verify MIMO using iperf.
On ANT2 emission is visible but on ANT1 there is very low siglan strength.
It looks like interference from ANT2 which seems to be proper diagnosis since we are not able to archive more than MCS7.
It doesn't matter how much traffic we want to transport, it is not impossible to jump into eg MCS11 which means that MIMO doesn't work
Screenshots from spectrum analyzer
ANT2
ANT1
TI Firmware logs
35 | 1 | 0 | 2017-07-19 08:42:38.475 | 0 | 0 | roles.c:1427 | 1 | Roles_ConfigureStartedRole | Role 4, supportedRates 0xfffffff, Bandwidth NLCP_CHAN_NO_HT, io_method MIMO |
117 | 1 | 0 | 2017-07-19 08:42:38.522 | 0 | 0 | mac_phy_api.c:713 | 1 | BalconyRadioTune_new | API_SET_TX_POWER: Start Role first time set tx power, bitmap 0x3, index 0 rfset 0 setTxPwr_desiredPower 20000 |
118 | 1 | 0 | 2017-07-19 08:42:38.522 | 0 | 0 | mac_phy_api.c:713 | 1 | BalconyRadioTune_new | API_SET_TX_POWER: Start Role first time set tx power, bitmap 0x2, index 1 rfset 0 setTxPwr_desiredPower 10000 |
glog_2017_07_19_084254_channel1.txt
glog_2017_07_19_084841_channel6 .txt
Is there something more to force MIMO (2 antennas) on TI module ?
Is there something more that need to be enabled to see the same signal level on second antenna ?
BR //Marcin