aaron_do
|
Hi,
I'm not so familiar with the literature on LTE. For WCDMA, a duplexor is used to seperate the TX and the RX. The TX side filter removes PA out-of-band noise, and the RX side removes PA transmit signal. The PA could be transmitting something like 24 dBm, which if left unattenuated could damage the RX.
The issue with using a single wideband LNA I think is that you could no longer use the SAW filter in front of the LNA, and therefore you would have to come up with some other creative way of suppressing the PA transmit signal.
I think LTE supports both TDD and FDD. For TDD it might not be an issue, but for FDD, both the transmitter and receiver would be working at the same time, so you would face the above issue.
regards, Aaron
|