Concurrent Dual-Band Low Intermediate Frequency Receiver Based on the Multiport Correlator and Single Local Oscillator

A concurrent dual-band low intermediate frequency receiver, which is based on the multiport correlator, is proposed in this letter. Only one single local oscillator signal is used to demodulate the dual-band RF signals at the same time, which greatly reduce the receiver complexity. The system configuration, output power theory, as well as the power spectrum are analyzed in detail, and then an appropriate baseband signal recovery theory is put forward. Finally, a concurrent dual-band six-port receiver is tested under the long-term evolution signals with 3- and 5-MHz bandwidths. The measured error vector magnitudes are all lower than 2%, which verify the proposed system structure and the signal recovery theory.