Patent ID: 7330707

Claim:
A heterodyne receiver comprising: a first reception circuit arranged to be an upper heterodyne system that passes a first upper frequency signal within a first upper frequency range and at least partially rejects a first lower frequency signal within a first lower frequency range as a first image signal, the first reception circuit providing the first upper frequency signal at an output of the first reception circuit; a second reception circuit arranged to be a lower heterodyne system that passes a second lower frequency signal within a second lower frequency range and at least partially rejects a second upper frequency signal within a second upper frequency range as a second image signal, the second reception circuit providing the second lower frequency signal at an output of the second reception circuit; a selection circuit for selecting and outputting one of the output signals of the first and second reception circuits; and a control circuit for controlling the selection circuit so that a reception circuit with less image interference in the output signals of the first and second reception circuits is selected; wherein a local oscillation frequency of the heterodyne receiver is changed when the selection circuit selects and outputs a different one of the output signals of the first and second reception circuits, such that the first upper frequency range and the second lower frequency range are substantially the same; wherein the first and second reception circuits receive one or more signals transmitted in one or more OFDM segments, wherein the control circuit controls the selection circuit so that an image frequency in a reception circuit falls within a range of another OFDM segment transmitted in conjunction with the one or more OFDM segments, and, wherein the one or more signals received by the first and second reception circuits are one or more ISDB-TSB broadcasting signals.