EP0851598A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Dual mode receiver and radio transmitter
Assignee: Nokia Oyj
•
Filing: 1997-12-12
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Granted: —
•
Expires: 2017-12-12
Abstract
Abstract A dual mode radio frequency receiver or transmitter capable of operating in a terrestrial mode in which signals are routed over a terrestrial network, and a satellite mode in which signals are routed over a satellite network. The radio frequency receiver includes a terrestrial front-end RF stage which receives signals from a terrestrial network, a satellite front-end RF stage which receives signals from a satellite network, and a common RF stage which includes mixing circuitry for frequency down-converting the signals received from the front-end RF stages.
Inventors
- 👤 John Samuels
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 17:41
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/005; H03; H03D; H03D7/00; H03D7/16; H03D7/161; H03D7/163; H04B1/0096; H04B1/38; H04B1/40; H04B1/403; H04B1/406
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
137 words
A radio frequency receiver operable in a first mode and a second mode,
the first mode being a terrestrial mode in which the receiver operates in a
terrestrial network, the second mode being a satellite mode in which the receiver
operates in a satellite network, the radio frequency receiver comprising: a first front-end RF stage for receiving a terrestrial signal of the terrestrial
network and providing a first output signal characteristic of the terrestrial signal, a second front-end RF stage for receiving a satellite signal of the satellite
network and providing a second output signal characteristic of the satellite
signal, and a common RF stage including an input for receiving either the first output signal
or the second output signal and including mixing circuitry for frequency down-converting
the first and second output signal to enable subsequent decoding.
Claim 2
Dependent Claim
26 words
A radio frequency receiver as claimed in claim 1, wherein the first output
signal is at a lower frequency than the frequency of the terrestrial signal.
Claim 3
Dependent Claim
21 words
A radio frequency receiver as claimed in claim 1 or claim 2, wherein the
first front-end RF stage comprises mixing circuitry.
Claim 4
Dependent Claim
27 words
A radio frequency receiver as claimed in claim 1, wherein the first output
signal is at substantially the same frequency as the frequency of the terrestrial
signal.
Claim 5
Dependent Claim
26 words
A radio frequency receiver as claimed in any preceding claim, wherein the
first output signal and the second output signal are at substantially the same
frequency.
Claim 6
Dependent Claim
27 words
A radio frequency receiver as claimed in any preceding claim, wherein the
second output signal is at a lower frequency than the frequency of the satellite
signal.
Claim 7
Dependent Claim
19 words
A radio frequency receiver as claimed in any preceding claim, wherein the
second front-end RF stage comprises mixing circuitry.
Claim 8
Dependent Claim
28 words
A radio frequency receiver as claimed in any preceding claim, wherein the
first front-end, the second front-end, and the common RF stages include filtering
means and amplifying means.
Claim 9
Dependent Claim
31 words
A radio frequency receiver as claimed in any preceding claim, wherein the
mixing circuitry of the common RF stage frequency down-converts the first or
second output signal via an intermediate frequency.
Claim 10
Dependent Claim
39 words
A radio frequency receiver as claimed in any preceding claim, wherein the
common RF stage includes switching means for selecting the first output signal
in the terrestrial mode or for selecting the second output signal in the satellite
mode.
Claim 11
Dependent Claim
37 words
A radio frequency receiver as claimed in any preceding claim, wherein the
mixing circuitry of the common RF stage provides the frequency down-converted
first or second output signal to base band circuitry which performs the
subsequent decoding.
Claim 12
Dependent Claim
143 words
A radio frequency transmitter operable in a first mode and a second mode,
the first mode being a terrestrial mode in which the transmitter operates in a
terrestrial network, the second mode being a satellite mode in which the
transmitter operates in a satellite network, the radio frequency transmitter
comprising: a common RF stage including mixing circuitry for frequency up-converting a
modulation signal to an intermediate signal, and first and second outputs for
providing the intermediate signal to a subsequent RF stage, a first terminal RF stage for receiving the intermediate signal from the first
output and transmitting a terrestrial signal characteristic of the intermediate
signal for reception by the terrestrial network, and a second terminal RF stage for receiving the intermediate signal from the second
output and transmitting a satellite signal characteristic of the intermediate signal
for reception by the satellite network.
Claim 13
Dependent Claim
25 words
A radio frequency transmitter as claimed in claim 12, wherein the
terrestrial signal is at a higher frequency than the frequency of the intermediate
signal.
Claim 14
Dependent Claim
21 words
A radio frequency transmitter as claimed in claim 12 or claim 13, wherein
the first terminal RF stage comprises mixing circuitry.
Claim 15
Dependent Claim
26 words
A radio frequency transmitter as claimed in claim 12, wherein the
terrestrial signal is at substantially the same frequency as the frequency of the
intermediate signal.
Claim 16
Dependent Claim
30 words
A radio frequency transmitter as claimed in any one of claims 12 to 15,
wherein the satellite signal is at a higher frequency than the frequency of the
intermediate signal.
Claim 17
Dependent Claim
23 words
A radio frequency transmitter as claimed in any one of claims 12 to 16,
wherein the second terminal RF stage comprises mixing circuitry.
Claim 18
Dependent Claim
32 words
A radio frequency transmitter as claimed in any one of claims 12 to 17,
wherein the first terminal, the second terminal, and the common RF stages
include filtering means and amplifying means.
Claim 19
Dependent Claim
46 words
A radio frequency transmitter as claimed in any one of claims 12 to 18,
wherein the common RF stage includes switching means for providing the
frequency up-converted intermediate signal via the first output in the terrestrial
mode or via the second output in the satellite mode.
Claim 20
Dependent Claim
27 words
A radio frequency transmitter as claimed in any one of claims 12 to 19,
wherein the common RF stage receives the modulation signal from base band
circuitry.
Claim 21
Dependent Claim
30 words
A radio frequency transceiver comprising a receiver as claimed in any one
of claims 1 to 11, and a transmitter as claimed in any one of claims 12 to 20.
Claim 22
Dependent Claim
12 words
A radio telephone comprising an apparatus as claimed in any preceding
claim.
References Cited (Backward Citations)
No citation records indexed.
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