Dual mode radio frequency reception device and corresponding multimedia receiver
The invention relates to a dual mode radio frequency reception device of the type enabling the reception firstly of multi-carrier broadcast signals in a first frequency band and secondly radio positioning signals in a second frequency band, comprising a single preprocessing module ( 21 ), particularly including a pass-band antenna filter ( 211 ) in which the pass-band includes at least the said first and second frequency bands, and outputting firstly to a first processing system ( 22 ) to process the said multi-carrier broadcast signals, and secondly to a second processing system ( 23 ) to process the said radio positioning signals.
1 - 9 . (canceled)
10 . A dual mode radio frequency reception device comprising:
a single preprocessing module configured to receive digital audio broadcast (DAB) signals in a first frequency band, and global positioning system (GPS) signals in a second frequency band, wherein the preprocessing module includes a pass-band antenna filter having a pass-band that includes at least the first and the second frequency bands;
wherein the preprocessing module is configured to substantially simultaneously output the DAB signals, and the GPS signals;
a first processing system coupled to the preprocessing module and configured to process the DAB signals; and
a second processing system coupled to the preprocessing module and configured to process the GPS signals substantially simultaneously as the processing of the DAB signals.
11 . The device as recited in claim 10 , wherein the single preprocessing module includes:
a first low noise amplifier coupled to receive the DAB signals and the GPS signals;
a first transposition stage coupled to the first low noise amplifier and configured to generate a first intermediate frequency, by multiplying by a first transposition frequency.
12 . The device as recited in claim 11 , wherein the first processing system includes a second transposition stage coupled to receive the DAB signals and to generate a second intermediate frequency by multiplying by a second transposition frequency.
13 . The device as recited in claim 12 , wherein the second processing system includes a third transposition stage coupled to receive the GPS signals and to generate a third intermediate frequency by multiplying by a third transposition frequency.
14 . The device as recited in claim 13 , further comprising a frequency synthesizer coupled to the preprocessing module, the first processing system, and the second processing system, wherein the frequency synthesizer is configured to generate from a reference frequency, a plurality of frequencies comprising:
an analog-digital conversion frequency;
the first transposition frequency;
the second transposition frequency; and
the third transposition frequency.
15 . The device as recited in claim 14 , wherein the first processing system comprises a first digitization means and the second processing system comprises a second digitization means, wherein the first and the second digitization means are each controlled by the analog-digital conversion frequency.
16 . The device as recited in claim 15 , wherein the first digitization means includes a delta-sigma pass-band modulator.
17 . The device as recited in claim 15 , wherein the second digitization means includes a “1-bit” quantifier.
18 . The device as recited in claim 10 , wherein the first frequency band comprises the range of frequencies between 1452.192 MHz and 1491.392 MHz, and the second frequency band comprises the range of frequencies between 1574.42 MHz and 1576.42 MHz.
19 . The device as recited in claim 10 , wherein the DAB signals comprise audio, video, and text.
20 . A multimedia receiver system comprising:
a display unit; and
a dual mode radio frequency receiver configured to receive digital audio broadcast (DAB) signals and global positioning system (GPS) signals, wherein the dual mode radio frequency receiver includes:
a single preprocessing module configured to receive the DAB signals in a first frequency band, and the GPS signals in a second frequency band, wherein the preprocessing module includes a pass-band antenna filter having a pass-band that includes at least the first and the second frequency bands;
wherein the preprocessing module is configured to substantially simultaneously output signals corresponding to the DAB signals, and the GPS signals;
a first processing system coupled to the preprocessing module and configured to process signals corresponding to the DAB signals; and
a second processing system coupled to the preprocessing module and configured to process signals corresponding to the GPS signals substantially simultaneously as the processing of signals corresponding to the DAB signals;
wherein the display unit is configured to display a geographic map generated from information received via the DAB signals, wherein the map includes an indication corresponding to a current geographic location of a user operating the multimedia receiver system, wherein the indication is generated from the GPS signals.
21 . A method comprising:
receiving via a single preprocessing module including a pass-band antenna filter having a pass-band that includes at least a first frequency band and a second frequency band, digital audio broadcast (DAB) signals in the first frequency band, and global positioning system (GPS) signals in the second frequency band;
substantially simultaneously outputting the DAB signals, and the GPS signals;
processing the DAB signals; and
processing the GPS signals substantially simultaneously as the processing of the DAB signals.
22 . The method as recited in claim 21 , further comprising
receiving the DAB signals and the GPS signals via a first low noise amplifier of the single preprocessing module; and
generating at a first transposition stage a first intermediate frequency, by multiplying the DAB signals and the GPS signals by a first transposition frequency.
23 . The method as recited in claim 22 , further comprising receiving the first intermediate frequency including the DAB signals and generating at a second transposition stage a second intermediate frequency by multiplying the first intermediate frequency by a second transposition frequency.
24 . The method as recited in claim 23 , further comprising receiving the first intermediate frequency including the GPS signals and generating a third intermediate frequency at a third transposition stage by multiplying the first intermediate frequency by a third transposition frequency.
25 . The method as recited in claim 21 , wherein the first frequency band comprises the range of frequencies between 1452.192 MHz and 1491.392 MHz, and the second frequency band comprises the range of frequencies between 1574.42 MHz and 1576.42 MHz.
26 . The method as recited in claim 21 , wherein the DAB signals comprise audio, video, and text.