• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 42 subscribers
  • Views 489 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

WL1805MOD: NA

carl vincent
Prodigy 110 points
Part Number: WL1805MOD

HI 

we would like to know when the WL18xx do MIMO/SISO/ antenna diversity  (function b/g/n, PA MIMO, …) ? 

In particular, our wish is to understand what the MRC mode does, how to activate it and how to check that it is activated.

A priori in MRC mode the Wifi client receives on 2 antennas and by reconstructed processing the signal, but this mode does not act on the emission.

If this mode is enabled on the module (ht.mode = 1 -> SISO40 or ht.mode = 2 -> SISO20; phy.number_of_assembled_ant2_4 = 2 -> MRC; wl18xx.phy.spare0 = 0) only on antenna 1 and should listen on antennas 1 and 2.

Is there a mode that allows in wifi mode b / g to use in automatic transmission the antenna 1 or the antenna 2 according to the level of reception of this one?

Thanks for your support

Regards

Carl

  • 0
    TI__Expert 6335 points
    Carl,

    We have assigned your post to the relevant engineer and will get back to you.
  • 0 in reply to dale
    TI__Prodigy 650 points

    Hi,

    The device can use MIMO 20MHz for 2.4GHz Tx & Rx in case there are 2 assembled 2.4GHz antennas and the device is connected to an AP that supports MIMO.

    For any SISO 20MHz OFDM (not 11b) reception in 2.4GHz when there are 2 assembled antennas than MRC algorithm is used by default (depending on the environment, it can choose the best antenna to use and even gain up to 3 dB in some cases).

    Antenna diversity is used only on 5GHz band and only on the 1837 TI MOD where there is DPDT switch to select the rigth antenna. The diversity is enabled by default when the number of assembled 5GHz antennas is 2. The 5GHz antenna diversity is for both Tx and Rx.

    For 2.4GHz SISO, Tx is always done on a the default antenna which is ANT1. This is not switchable and therefore there is also no correlation between the Tx and MRC.

    Regards,

    Oren