Patent US5748683A successfully refreshed from Google Patents.
US5748683A
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Multi-channel transceiver having an adaptive antenna array and method
Assignee: Google Technology Holdings LLC
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Filing: 1995-07-31
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Granted: 1998-05-05
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Expires: 2015-07-31
Abstract
Abstract A receiver (100), transmitter (200) and transceiver (400) in accordance with the present invention overcome the disadvantages of applying adaptive antenna array technology to multi-channel communication systems. Multi-channel radio frequency (RF) signals received via an adaptive antenna array (102) are converted from an analog form to a digital form prior to splitting and processing to recover communication channels contained therein. A number of digital communication signals are digitally combined into a multi-channel digital signal and converted from the digital form to an analog radio frequency form prior to transmission from the adaptive antenna array.
Inventors
- 👤 Paul Fielding Smith
- 👤 Robert Mark Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:27
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/0003; H04B1/0007; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/246; H01Q3/00; H01Q3/26; H01Q3/2605; H03; H03C; H03C1/00; H03C3/00; H03D; H03D7/00; H03D7/16; H03D7/165; H04B1/001; H04B1/0017; H04B1/0021; H04B1/02; H04B1/04; H04B1/0483; H04B1/06; H04B1/10; H04B1/12; H04B1/123; H04B1/126; H04B1/16; H04B1/26; H04B1/28; H04B1/38; H04B1/40; H04B7/00; H04B7/02; H04B7/04; H04B7/06; H04B7/0686; H04B7/0691; H04B7/08; H04B7/0802; H04B7/14; H04B7/15; H04B7/185; H04B7/1851; H04B7/18515; H04B7/24; H04L; H04L1/00; H04L1/02; H04L1/06; H04L1/22; H03B; H03B28/00; H04B7/0868; H04B7/0874; H04W; H04W4/00; H04W4/18; H04W88/00; H04W88/02; H04W88/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
190 words
A multi-channel receiver comprising: a plurality of radio frequency processing elements, each radio frequency processing element comprising: a radio frequency down converter having an input coupled to radio frequency signals received at one of a plurality of antenna elements of an antenna array and having an intermediate frequency signal output; an analog-to-digital converter having an input coupled to the intermediate frequency signal output and a digital intermediate frequency signal output; a digital splitter having an input coupled to the digital intermediate frequency output and a plurality of outputs; a plurality of digital down-converters, each digital down-converter having an input coupled to one of the digital splitter outputs and a digital baseband frequency signal output; and a channel processing element comprising: a plurality of phase selectors, each phase selector having an input coupled to one of the digital baseband frequency signal outputs and a phase selected output; a summer having a plurality of inputs each coupled to the phase selected output of the phase selectors and a summed signal output; and a channel processor, the channel processor having an input coupled to the summed signal output and a communication signal output.
Claim 2
Dependent Claim
190 words
A multi-channel receiver comprising: a plurality of radio frequency processing elements, each radio frequency processing element comprising: a radio frequency down converter having an input coupled to radio frequency signals received at one of a plurality of antenna elements of an antenna array and having an intermediate frequency signal output; an analog-to-digital converter having an input coupled to the intermediate frequency signal output and a digital intermediate frequency signal output; a digital splitter having an input coupled to the digital intermediate frequency output and a plurality of outputs; a plurality of digital down-converters, each digital down-converter having an input coupled to one of the digital splitter outputs and a digital baseband frequency signal output; and a channel processing element comprising: a plurality of phase selectors, each phase selector having an input coupled to one of the digital baseband frequency signal outputs and a phase selected output; a summer having a plurality of inputs each coupled to the phase selected output of the phase selectors and a summed signal output; and a channel processor, the channel processor having an input coupled to the summed signal output and a communication signal output.
Claim 3
Dependent Claim
25 words
The multi-channel receiver of claim 1 wherein the antenna array comprises a plurality of faces and a plurality of antenna elements associated with each face.
Claim 4
Dependent Claim
30 words
The multi-channel receiver of claim 2 wherein each of the plurality of antenna elements associated with each face is coupled to one of the plurality of radio frequency processing elements.
Claim 5
Dependent Claim
52 words
The multi-channel receiver of claim 1 further comprising first and second radio frequency processing shelves the first radio frequency processing shelve comprising a first portion of the plurality of radio frequency processing elements and the second radio frequency processing shelve comprising a second portion of the plurality of radio frequency processing elements.
Claim 6
Dependent Claim
17 words
The multi-channel receiver of claim 1 wherein each channel processing element comprises a plurality of channel processors.
Claim 7
Independent Claim
131 words
An apparatus for receiving radio frequency communications comprising: an antenna array having a plurality of antenna elements each for receiving radio frequency signals; radio frequency processor means associated with each antenna element: for converting each of the radio frequency signals to a digital intermediate frequency signal; for digitally down converting the digital intermediate frequency signal to a baseband intermediate frequency signal; and for splitting the baseband intermediate frequency signal into a plurality of substantially identical baseband intermediate frequency signals; and channel processing means, coupled to receive for each antenna element one of the substantially identical baseband intermediate frequency signals: for phase selecting each of the baseband intermediate frequency signals; for summing the phase selected baseband intermediate frequency signals; and for processing the summed signal to recover a communication signal contained therein.
Claim 8
Independent Claim
131 words
An apparatus for receiving radio frequency communications comprising: an antenna array having a plurality of antenna elements each for receiving radio frequency signals; radio frequency processor means associated with each antenna element: for converting each of the radio frequency signals to a digital intermediate frequency signal; for digitally down converting the digital intermediate frequency signal to a baseband intermediate frequency signal; and for splitting the baseband intermediate frequency signal into a plurality of substantially identical baseband intermediate frequency signals; and channel processing means, coupled to receive for each antenna element one of the substantially identical baseband intermediate frequency signals: for phase selecting each of the baseband intermediate frequency signals; for summing the phase selected baseband intermediate frequency signals; and for processing the summed signal to recover a communication signal contained therein.
Claim 9
Dependent Claim
24 words
The apparatus of claim 6 wherein the antenna array has a plurality of faces and a plurality of antenna elements associated with each face.
Claim 10
Dependent Claim
25 words
The apparatus of claim 7 wherein each of the plurality of antenna elements associated with the faces is selectively coupled to the channel processing means.
Claim 11
Independent Claim
115 words
A method of receiving radio frequency communications comprising: receiving radio frequency signals at a plurality of elements of an antenna array; for each element of the antenna array: converting each of the radio frequency signals to a digital intermediate frequency signal; digitally down converting the digital intermediate frequency signal to a baseband intermediate frequency signal; and splitting the baseband intermediate frequency signal into a plurality of substantially identical baseband intermediate frequency signals; and one of the substantially identical baseband intermediate frequency signals of each of the antenna elements: phase selecting the baseband intermediate frequency signals; summing the phase selected baseband intermediate frequency signals; and processing the summed signal to recover a communication signal contained therein.
Claim 12
Independent Claim
115 words
A method of receiving radio frequency communications comprising: receiving radio frequency signals at a plurality of elements of an antenna array; for each element of the antenna array: converting each of the radio frequency signals to a digital intermediate frequency signal; digitally down converting the digital intermediate frequency signal to a baseband intermediate frequency signal; and splitting the baseband intermediate frequency signal into a plurality of substantially identical baseband intermediate frequency signals; and one of the substantially identical baseband intermediate frequency signals of each of the antenna elements: phase selecting the baseband intermediate frequency signals; summing the phase selected baseband intermediate frequency signals; and processing the summed signal to recover a communication signal contained therein.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-04 | 2001-11-03 | 2002-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-04 | 2005-11-03 | 2006-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-04 | 2009-11-03 | 2010-05-05 | $7700.00 | Window Closed / Lapsed |