Abstract
Full-duplex (FD) transmission is an emerging wireless technology that holds a great promise in improving the wireless throughput. The concept of fullduplex communication is simple. A single device can simultaneously transmit and receive on the same frequency channel. However, as the transmitted signal is many orders of magnitude stronger than the desired signal at the input of the receiver, it is extremely challenging to recover the desired signal and enable such a communication. In particular, the self-interfering (SI) signal needs to be suppressed by a factor of a billion to a trillion, requiring 90 − 120 dB of self-interference cancellation (SIC). Full-duplex wireless transceivers are typically operated over two concurrent half duplex channels, one for the transmitter (Tx) and one for the receiver (Rx). These half-duplex links have RF carriers separated in the frequency domain, namely using a TDD or Frequency Division Duplexing (FDD) scheme. This allows the receiver’s sensitive front-end to be isolated from the high power generated by the co-located transmitter. In this paper, a full duplex communication system is implemented using Universal Software Radio Peripheral (USRP) and interfaced to a system installed with LabVIEW software. IQ signals transmission scenario was applied and tested.
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