RDS radio unit

Details RDS radio unit RDS radio unit

2006-02-13

2009-06-02

Vo, Nguyen (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S184100, C455S186100

Reexamination Certificate

active

07542746

ABSTRACT:
The invention relates to an RDS radio unit implementing a user friendly algorithm for automatic frequency change without inconveniencing the user with interruptions. A timer is used to delay the start of searches for a better frequency. The RDS radio unit comprises: a radio tuner (2) tunable to radio frequencies; a control unit (3) capable of controlling the radio tuner and monitoring received signal strength on a frequency to which the radio tuner is tuned, a memory (4) for receiving and storing a list of alternative frequencies; a timer (5) capable of timing a number of operations. The control unit is adapted to perform a search for a better channel frequency than an original frequency with a program matching the original frequency only when a first time T1has elapsed, since the occurrence of an alternative frequency update request or a detection of received signal strength below a predetermined threshold. The present invention also relates to a telecommunication device (1) incorporating such an RDS radio unit.

REFERENCES:
patent: 5584051 (1996-12-01), Goken
patent: 5745845 (1998-04-01), Suenaga et al.
patent: 6535752 (2003-03-01), Dent
patent: 2006/0009216 (2006-01-01), Welnick et al.
patent: 39 34 314 (1990-04-01), None
patent: 0433596 (1991-06-01), None
patent: 0 552 442 (1993-07-01), None
patent: 2409360 (2005-06-01), None

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