EP0534255A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Multiple use digital transmitter/transceiver with time multiplexing
Assignee: Raytheon Co
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Filing: 1992-09-12
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Granted: —
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Expires: 2012-09-12
Abstract
Abstract A multiple use radio frequency (RF) transmitter comprises means (2, 8, 22) for generating a plurality of different digital information signals and means (12) for generating respective digital carrier signals for said information signals, said carrier signals having higher frequencies than their respective information signals. Further included are means (10) for modulating said digital carrier signals with their respective digital information signals and means (24) for accumulating said modulated signals to a composite digital signal. Digital-to-analog converter (DAC) means (26) are common to each of said modulated signals for converting said composite digital signal to a composite signal in analog format. Further provided are means (30) for altering the frequency of said composite signal to a desired radio frequency (RF) band and means (32) for excluding frequencies outside said desired RF band from said composite signal.
Inventors
- 👤 Edwin A. Kelley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 23:11
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/02; H04L5/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A multiple use radio frequency (RF) transmitter, comprising: means (2, 8, 22) for generating a plurality of different digital information signals, means (12) for generating respective digital carrier signals for said information signals, said carrier signals having higher frequencies than their respective information signals, means (10) for modulating said digital carrier signals with their respective digital information signals, means (24) for accumulating said modulated signals to a composite digital signal, digital-to-analog converter (DAC) means (26) common to each of said modulated signals for converting said composite digital signal to a composite signal in analog format, means (30; 38) for altering the frequency of said composite signal to a desired radio frequency (RF) band, and means (32) for excluding frequencies outside said desired RF band from said composite signal.
Claim 2
Dependent Claim
22 words
The multiple use RF transmitter of claim 1, wherein said digital information signals are separated by time multiplexing prior to being accumulated.
Claim 3
Dependent Claim
66 words
The multiple use RF transmitter of claim 1 or claim 2, said digital information and digital carrier signal generating means (2, 12) generating their respective signals on a time multiplexed basis, said modulating means (10) operating on a time multiplexed basis to produce a plurality of time multiplexed modulated signals, and said accumulating means (24) accumulating said time multiplexed modulated signals to a simultaneous time basis.
Claim 4
Dependent Claim
44 words
The multiple use RF transmitter of any of claims 1 - 3, said means (30; 38) for altering the frequency of said composite signal comprising means (38) for increasing the sampling rate of said signal and thereby producing higher frequency images of said signal.
Claim 5
Dependent Claim
29 words
The multiple use RF transmitter of any of claims 1 - 4, wherein said digital information signals are separated in respective redundant digital modulating means (20) prior to accumulation.
Claim 6
Dependent Claim
63 words
The multiple use RF transmitter of any of claims 1 - 5, said digital information signal generating means (2, 8, 22) comprising a digital signal processor (2) for generating baseband digital information signals, means (22) for generating higher frequency images of said baseband signals, and means (8) for selecting a desired image signal for each information signal for modulating a respective carrier signal.
Claim 7
Dependent Claim
34 words
The multiple use RF transmitter of claim 6, said means (22) for generating higher frequency images of said baseband signals comprising means (76 - 86) for increasing the sampling rates of said baseband signals.
Claim 8
Dependent Claim
54 words
The multiple use RF transmitter of any of claims 1 - 7, said means (30; 38) for altering the frequency of said composite signal operating upon said composite signal in its digital form and comprising means (38) for increasing the sampling rate of said signal and thereby producing higher frequency images of said signal.
Claim 9
Dependent Claim
28 words
The multiple use RF transmitter of claim 8, said means (38) for increasing the sampling rate of said composite signal assigning a zero value to the added samples.
Claim 10
Dependent Claim
84 words
The multiple use radio frequency (RF) transmitter, comprising: means (2, 8, 22) for generating a plurality of time multiplexed digital information signals, means (12) for generating digital carrier signals for said information signals, means (10) for digitally modulating said digital carrier signals with respective digital information signals, digital-to-analog converter means (26) common to each of said modulated signals for converting said modulated carrier signals to analog format, and means (30; 38) for altering the frequency of said modulated signals to a desired RF band.
Claim 11
Dependent Claim
131 words
A multiple use radio frequency (RF) transceiver comprising: means (2, 8, 22) for generating a plurality of different digital information signals, means (18) for digitizing received analog RF signals, means (12) for generating digital carrier signals for said information signals and digital tuner signals for said digitized RF signals, digital modulator means (10) for digitally modulating said digital carrier signals with respective digital information signals and for extracting desired frequencies from said digitized RF signals with said tuner signals, means (20) for providing reception outputs from said extracted frequencies of said digitized RF signals, digital-to-analog converter (DAC) means (26) common to each of said modulated digital signals for converting said signals to analog format, and means (30; 38) for altering the frequency of said modulated signals to a desired RF band.
References Cited (Backward Citations)
No citation records indexed.
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