EP0780993A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Radiotelephone transceiver operative over more than one frequency range
Assignee: Nokia of America Corp
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Filing: 1996-12-03
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Granted: —
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Expires: 2016-12-03
Abstract
Abstract A radiotelephone wireless communication apparatus is operative in both a first radiotelephone communication system including a first base station transmitting radiotelephone signals at a first band of frequencies and in a second radiotelephone communication system including a second base station transmitting radiotelephone signals at a second band of frequencies different in frequency from the first band of frequencies. The wireless radiotelephone communication apparatus has a common baseband circuitry (210,212,214,216,218,220,222,224) for operating with the first and second base stations along with first and second RF circuits, (200,400), to communicate with each of these same base stations.
Inventors
- 👤 Stephen N. Barthelmes
- 👤 Leonid Strakovsky
- 👤 James Gifford Evans
- 👤 Ralph Francis Trambarulo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 08:31
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/06; H04B; H04B1/00; H04B1/005; H04B1/0064; H04B1/0053; H04B1/006; H04B1/0096; H04B1/38; H04B1/40; H04B1/403; H04B1/406; H04B1/44
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
97 words
A communication apparatus for receiving RF signals, comprising: a receiver (238,410) for receiving an RF signal in a first band of frequencies and for receiving an RF signal in a second band of frequencies different from said first band of frequencies; a first converter (402) that shifts said RF signal in said second band of frequencies to a RF signal in a third band of frequencies substantially contiguous with a portion of said first band of frequencies; and a plurality of baseband circuits for processing said RF signal input from said first and third band of frequencies.
Claim 2
Dependent Claim
32 words
The communication apparatus of claim 1, wherein said plurality of baseband circuits includes a central processing unit (214) that enables reception of RF signals in said first or second band of frequencies.
Claim 3
Dependent Claim
37 words
The communication apparatus of claim 1, wherein said plurality of baseband circuits includes a second converter (228) that down-converts said RF signal from one of said first or said third band of frequencies to an intermediate frequency..
Claim 4
Dependent Claim
25 words
The communication apparatus of claim 1, wherein said plurality of baseband circuits includes a demodulator (210) that demodulates said intermediate frequency to a baseband frequency.
Claim 5
Dependent Claim
97 words
A communication apparatus for transmitting RF signals, comprising: a transmitter (238,420) for transmitting an RF signal in a first band of frequencies and an RF signal in a second band of frequencies different from said first band of frequencies; a first converter (412) that shifts an RF signal in a third band of frequencies above but substantially contiguous with a portion of said first band of frequencies to an RF signal in said second band of frequencies; and a plurality of baseband circuits for processing said RF signal outputted to said first and third bands of frequencies.
Claim 6
Dependent Claim
33 words
The communication apparatus of claim 5, wherein said plurality of baseband circuits includes a central processing unit (214) that enables the transmission of RF signals in said first or second band of frequencies.
Claim 7
Dependent Claim
33 words
The communication apparatus of claim 5, wherein said plurality of baseband circuits includes a second converter (242) that up-converts an intermediate frequency to one of said first or said third band of frequencies.
Claim 8
Dependent Claim
25 words
The communication apparatus of claim 5, wherein said plurality of baseband circuits includes a modulator (210) that modulates a baseband frequency to said intermediate frequency.
Claim 9
Dependent Claim
130 words
A communication apparatus for receiving and transmitting RF signals, comprising: a transceiver (200,400) for receiving and transmitting an RF signal in a first band of frequencies and for receiving and transmitting an RF signal in a second band of frequencies different from said first band of frequencies; a first converter (402) that shifts said RF signal received from said transceiver in said second band of frequencies to an RF signal in a third band of frequencies, substantially contiguous with a portion of said first band of frequencies; and a second converter (412) that shifts an RF signal in said third band of frequencies, substantially contiguous with a portion of said first band of frequencies, to an RF signal to be transmitted by said transceiver in said second band of frequencies.
Claim 10
Dependent Claim
28 words
The communication apparatus of claim 9, wherein a plurality of baseband circuits processes said RF signal input from or outputted to said first and third bands of frequencies.
Claim 11
Dependent Claim
35 words
The communication apparatus of claim 10, wherein said plurality of baseband circuits includes a central processing unit (214) that enables the reception and transmission of RF signals in said first or second band of frequencies.
Claim 12
Dependent Claim
32 words
The communication apparatus of claim 10, wherein said plurality of baseband circuits includes an up-converter (242) that converts an intermediate frequency to one of said first or said third band of frequencies.
Claim 13
Dependent Claim
32 words
The communication apparatus of claim 10, wherein said plurality of baseband circuits includes a down-converter (228) that converts one of said first or said third band of frequencies to an intermediate frequency.
Claim 14
Independent Claim
120 words
The method of operating in a communication network involving more than one frequency band comprising the steps of: receiving an RF signal in one of a first band of frequencies and a second band of frequencies, said second band of frequencies different from said first band of frequencies; wherein said RF signal received in said second band of frequencies is shifted to an RF signal in a third band of frequencies, substantially contiguous with a portion of said first band of frequencies; and transmitting an RF signal in one of said first band of frequencies and said second band of frequencies; wherein said RF signal transmitted in said second band of frequencies was shifted forms aid third band of frequencies.
Claim 15
Dependent Claim
29 words
The method of claim 14, further comprising the step of up-converting an intermediate frequency to said RF signal in one of said first and said third band of frequencies.
Claim 16
Dependent Claim
18 words
The method of claim 15, further comprising the step of modulating a baseband frequency to said intermediate frequency.
Claim 17
Independent Claim
130 words
A method of operating in a communication network involving more than one frequency band, comprising the steps of: receiving a plurality of RF signals in one of a first band of frequencies and a second band of frequencies, said second band of frequencies different from said first band of frequencies; wherein said plurality of RF signals received in said second band of frequencies are shifted to a plurality of RF signals in a third band of frequencies, substantially contiguous with a portion of said first band of frequencies; and transmitting a plurality of RF signals in one of said first band of frequencies and said second band of frequencies; wherein said plurality of RF signals transmitted in said second band of frequencies were shifted from said third band of frequencies.
References Cited (Backward Citations)
US4989230A
Cited
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