H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
H04B1/06—Receivers
H04B1/16—Circuits
H04B1/30—Circuits for homodyne or synchrodyne receivers
H04B1/302—Circuits for homodyne or synchrodyne receivers for single sideband receivers