hi anshu,
i am not sure if antenna hopping is something that is standardized in 3GPP. Therefore, antenna hopping might mean different things for different vendors…
anyway, here is how it works for ALU:
a TRX transmits one TDMA frame through one antenna, and the next one through the other antenna.
This is a feature that works only with twinTRX.
The benefit is that each timeslot is sent over two different antenna, alternatively, so that helps fighting fast fading. Radio coverage is increased.
Regards
pix