Direct conversion receiver

Details Direct conversion receiver Direct conversion receiver

2007-11-06

2007-11-06

Vuong, Quochien B. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S302000, C455S334000

Reexamination Certificate

active

10701636

ABSTRACT:
The invention relates to a direct conversion receiver for down-converting a received multi-carrier signal comprising at least a first and a second carrier signal at image carrier frequencies to a base band resulting in that the first carrier signal includes an image signal of said second carrier signal. Further, the known direct conversion receiver comprises at least a first and a second digital down-converter unit for separating the first and the second carrier signal from the down-converted multi-carrier signal after digitization. In order to make such receivers less complex and adjust them for fast time varying szenarios it is proposed to provide an error estimating unit to said receivers for calculating a compensating coefficient representing the quota and/or the phase position of the image signal of the second carrier signal being included in the first carrier signal and to remove the undesired image signal in response to said compensating coefficient.

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