PROBLEM TO BE SOLVED: To provide an apparatus, including a first signal source generating a first signal and a second signal source generating a second signal.SOLUTION: A cross-over switch is connected between the two signal sources so as to generate in a direct switch configuration a sum of the first and second signals and in a crossed switch configuration a difference between the first and second signals. An apparatus 12 includes a processor 26 which is configured to receive the sum and the difference, and to recover the first signal and the second signal therefrom.【課題】第１の信号を生成する第１の信号源と、第２の信号を生成する第２の信号源と、を含む、装置を提供する。【解決手段】２つの信号源間にクロスオーバースイッチが、直接スイッチ構成において第１及び第２の信号の和を生成し、かつ交差スイッチ構成において第１及び第２の信号間の差を生成するように接続される。装置１２は、和及び差を受信し、これらから第１の信号及び第２の信号を復元するプロセッサ２６を含む。【選択図】図１
