Receiving apparatus and method
AssigneeSony Corporation
InventorsTadashi Imai, Kozo Kobayashi
Life of this patent
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Abstract
A receiving apparatus and method which can prevent second order harmonic interference and beat interference in a direct orthogonal detector is disclosed. When a control signal of the high level is inputted to a control terminal, then a first high frequency switch diode is turned on and a second high frequency switch diode is turned off. In this instance, a filter circuit functions as a low-pass filter. When a control signal of a low level is inputted to the control terminal, then the first high frequency switch diode is turned off and the second high frequency switch diode is turned on. In this instance, the filter circuit functions as a high-pass filter.
Claims5
A receiving apparatus for receiving and directly orthogonally detecting a digital modulated wave, comprising:
- filter means for selectively attenuating a signal component of said digital modulated wave having a frequency equal to twice a designated reception frequency or a signal component of said digital modulated wave having a frequency equal to one half said designated reception frequency, wherein the signal component to be attenuated is selected according to said designated reception frequency;
- and
- detecting means for detecting an I-component signal and a Q-component signal from the digital modulated wave attenuated by said filter means.
A receiving method for a receiving apparatus for receiving and directly orthogonally detecting a digital modulated wave, comprising the steps of:
- selectively attenuating a signal component of said digital modulated wave having a frequency equal to twice a designated reception frequency or a signal component of said digital modulated wave having a frequency equal to one half said designated reception frequency, wherein the signal component to be attenuated is selected according to said designated reception frequency;
- and
- detecting an I-component signal and a Q-component signal from the digital modulated wave attenuated in said step of selectively attenuating.
Dependencies are inferred from the claim text.