There is a pin on the WP7607 for a diversity antenna. Does this module support true antenna diversity? I ask because I only see one RF transceiver in the function specification sheet. The RF signal can either come through the primary antenna or the diversity antenna, both lines have an RF switch which implies that it uses a switching configuration, and not true diversity.
Yes, it does. The diversity antenna enhances signal quality. And I see an increase in signal strength when plugging in a diversity antenna into WP7607. If you want to check the diversity antenna, you can use AT+CSQ to monitor signal strength on the module with/without diversity antenna.
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So this is diversity for 3G and MIMO for LTE (which only affects downlink).
@Donald I am a bit confused, a true diversity configuration will have a unique RF receiver for that antenna, and one for the primary antenna. The two share a transceiver for the WP7607. Can you elaborate on what makes this a “true” diversity configuration?
@mlw okay so from what I gathered in your response is that diversity only enhances the transmission when it is in 3G mode, or if we are using a MIMO antenna network? Does it support 4G diversity setup?
The second antenna port on all of the units only improves receive performance, this is because all of our units only have a single transmitter. This is done differently between 3G and LTE.
In 3G you have diversity which allows the unit to be able to mathematically improve the receiver sensitivity and there by improve the SNY and the rate at which the unit can receive.
With LTE it is MIMO where (in simple terms) the unit will set up different data paths to each of the antennas, if you only operate with a single antenna then you, in theory, halve your maximum downlink BW.
You can use !RXDEN command to enable/disable WCDMA/LTE receive diversity.
Please refer to AirPrime WP8548/WP75xx/WP76xx/WP77xx AT Command Reference for more details.