A system comprising: • a duplexer system having a first transmit port, a second transmit port, a receive port, and an antenna port, the duplexer system being configured to: o receive a first transmit signal at the first transmit port and a second transmit signal at the second transmit port, the first and second transmit signals being balanced transmit signals; and o combine the first and second transmit signals to provide a combined transmit signal at the antenna port; • one or more digital filters comprise a digital filter configured to filter a digital input signal to provide a filtered digital input signal, the one or more digital filters being configured to cause a phase difference between the first transmit signal received at the first transmit port and the second transmit signal received at the second transmit port such that: ∘ a first transmit leakage signal resulting from leakage of the first transmit signal from the first transmit port to the receive port and a second transmit leakage signal resulting from leakage of the second transmit signal from the second transmit port to the receive port destructively combine at the receive port; • a first transmitter configured to process the digital input signal to provide the first transmit signal; and • a second transmitter configured to process the filtered digital input signal to provide the second transmit signal, wherein ∘ the power of both of the first and second transmitters (120, 122) contributes to power of the combined transmit signal. • a duplexer system having a first transmit port, a second transmit port, a receive port, and an antenna port, the duplexer system being configured to: o receive a first transmit signal at the first transmit port and a second transmit signal at the second transmit port, the first and second transmit signals being balanced transmit signals; and o combine the first and second transmit signals to provide a combined transmit signal at the antenna port; o receive a first transmit signal at the first transmit port and a second transmit signal at the second transmit port, the first and second transmit signals being balanced transmit signals; and o combine the first and second transmit signals to provide a combined transmit signal at the antenna port; • one or more digital filters comprise a digital filter configured to filter a digital input signal to provide a filtered digital input signal, the one or more digital filters being configured to cause a phase difference between the first transmit signal received at the first transmit port and the second transmit signal received at the second transmit port such that: ∘ a first transmit leakage signal resulting from leakage of the first transmit signal from the first transmit port to the receive port and a second transmit leakage signal resulting from leakage of the second transmit signal from the second transmit port to the receive port destructively combine at the receive port; • a first transmitter configured to process the digital input signal to provide the first transmit signal; and • a second transmitter configured to process the filtered digital input signal to provide the second transmit signal, wherein ∘ the power of both of the first and second transmitters (120, 122) contributes to power of the combined transmit signal. ∘ a first transmit leakage signal resulting from leakage of the first transmit signal from the first transmit port to the receive port and a second transmit leakage signal resulting from leakage of the second transmit signal from the second transmit port to the receive port destructively combine at the receive port; • a first transmitter configured to process the digital input signal to provide the first transmit signal; and • a second transmitter configured to process the filtered digital input signal to provide the second transmit signal, wherein • a first transmitter configured to process the digital input signal to provide the first transmit signal; and • a second transmitter configured to process the filtered digital input signal to provide the second transmit signal, wherein ∘ the power of both of the first and second transmitters (120, 122) contributes to power of the combined transmit signal.