Method for separating a RDS signal component and signal receiver
AssigneeSony Deutschland GmbH
InventorJens Wildhagen
Life of this patent
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Abstract
A signal receiver and a method for separating a RDS signal component from a received signal is described. After the received signal has been downconverted to the baseband, the baseband signal is split up into a first baseband signal for a first signal path and a second baseband signal for a second signal path. The first baseband signal is highpass filtered and forwarded to a frequency synchronization unit that generates a frequency synchronization carrier. The second baseband signal is modified in accordance with the frequency synchronization carrier provided by the first signal path, and a synchronized baseband signal is obtained that still comprises the full range of the RDS signal's spectral components.
Claims24
A signal receiver for receiving a signal including a RDS signal component, comprising:
- a single downconversion unit configured to convert a received signal to a baseband signal;
- a first signal path for said baseband signal, said first signal path being located downstream said downconversion unit and including a first highpass filter unit configured to filter said baseband signal and to generate a highpass filtered signal, and a frequency synchronization unit configured to derive, from said highpass filtered signal, a frequency synchronization carrier signal;
- a second signal path for said baseband signal located downstream said downconversion unit, whereby in said second signal path, the baseband signal's frequency is modified in accordance with said frequency synchronization carrier signal to obtain a synchronized baseband signal;
- and
- a splitting unit located downstream said downconversion unit and located upstream said first and second signal paths and configured to directly receive the baseband signal from the downconversion unit and to directly split the baseband signal into the first highpass filter unit, of the first signal path, and the second signal path.
A method for separating a RDS signal component from a received signal including a RDS signal component, comprising:
- converting, by a single down conversion unit, said received signal into a baseband signal;
- directly splitting up, by a splitting unit, said baseband signal converted in the converting step into a first baseband signal for a first highpass filtering operation, of a first signal path, and a second baseband signal for a second signal path;
- performing the first highpass filtering operation of said first baseband signal in order to generate a highpass filtered signal, whereby low-frequency components of said first baseband signal are removed;
- deriving, from said highpass filtered signal, a frequency synchronization carrier signal;
- and
- modifying said second baseband signal's frequency in accordance with said frequency synchronization carrier signal to obtain a synchronized baseband signal.
Dependencies are inferred from the claim text.