US6011789A
Expired / Lapsed
US
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Broadband CDMA overlay system and method
Assignee: InterDigital Technology Corp
•
Filing: 1997-10-15
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Granted: 2000-01-04
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Expires: 2017-10-15
Abstract
Abstract A spread-spectrum CDMA communications system for communicating data between a plurality of users to a plurality of spread-spectrum units. The spread-spectrum communications system is located within a same geographical region as occupied by an existing FDMA, proposed TDMA or any other mobile-cellular system. The spread-spectrum CDMA communications system includes a plurality of spread-spectrum-base stations and a plurality of spread-spectrum units. A spread-spectrum-base station has a comb filter for notch filtering predetermined channels of the mobile-cellular system, a device for converting the format of the data into a form for communicating over radio waves, a spread-spectrum modulator for spread-spectrum processing the data, and a transmitter for transmitting the spread-spectrum-processed converted data from the spread-spectrum-base station to a spread-spectrum unit. The spread-spectrum-base station also has an antenna, and spread-spectrum detectors for recovering data communicated from the spread-spectrum units. A spread-spectrum unit has an antenna, and a detector, including a spread-spectrum demodulator, coupled to the antenna for recovering data communicated from the spread-spectrum-base station, and the spread-spectrum unit has a spread-spectrum modulator, a transmitter, and a device for converting the format of the data for communicating over radio waves.
Inventors
- 👤 Donald L. Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:58
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/30; H04W52/34; H04W52/343; G; G01; G01S; G01S13/00; G01S13/74; G01S13/82; G01S5/00; G01S5/0009; G01S5/0018; G01S5/0036; G01S5/02; G01S5/14; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/7097; H04B1/71; H04B1/7101; H04B1/7102; H04B7/00; H04B7/14; H04B7/15; H04B7/204; H04B7/216; H04B7/24; H04B7/26; H04B7/2628; H04B7/2631; H04J; H04J13/00; H04W52/346; H04B7/185; H04B7/1853; H04B7/18545; H04B7/18547; H04W4/00; H04W4/18; H04W84/00; H04W84/02; H04W84/04; H04W84/042; H04W88/00; H04W88/08; H04W92/00; H04W92/16; H04W92/18
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
243 words
A spread-spectrum code division multiple access (CDMA) communications system for communicating data between a plurality of spread-spectrum units, said spread-spectrum CDMA communications system located within a same geographical region as occupied by a mobile-cellular system with each cell of the mobile-cellular system having a cellular bandwidth divided into predetermined channels and guard bands between the predetermined channels, and having cellular units communicating on the predetermined channels, said spread-spectrum CDMA communications system communicating on the predetermined channels, comprising: a plurality of spread-spectrum-base stations located within the mobile-cellular system for communicating the data to the plurality of spread-spectrum units, each of said spread-spectrum-base stations having base-sector means for sectoring a geographical area covered by said spread-spectrum-base station into at least two sectors, with said spread-spectrum-base station, for each sector, including, base-converting means for converting the format of the data into a form for output to communicate over radio waves; base-spread-spectrum-processing means for spread-spectrum-processing the converted data; and base-transmitting means for transmitting across cellular bandwidth the spread-spectrum-processed-converted data from the spread-spectrum-base station to a spread-spectrum unit as a spread-spectrum signal; a plurality of spread-spectrum units, each of said spread-spectrum units including, a unit antenna for receiving the spread-spectrum signal as a received signal; and a unit-spread-spectrum-detection means, coupled to said unit antenna, for recovering the data in the spread-spectrum signal communicated from said spread-spectrum-base station, said unit-spread-spectrum-detection means including unit-filtering means for filtering the received spread-spectrum signal and unit-spread-spectrum-demodulating means for despreading the received spread-spectrum signal.
Claim 2
Dependent Claim
243 words
A spread-spectrum code division multiple access (CDMA) communications system for communicating data between a plurality of spread-spectrum units, said spread-spectrum CDMA communications system located within a same geographical region as occupied by a mobile-cellular system with each cell of the mobile-cellular system having a cellular bandwidth divided into predetermined channels and guard bands between the predetermined channels, and having cellular units communicating on the predetermined channels, said spread-spectrum CDMA communications system communicating on the predetermined channels, comprising: a plurality of spread-spectrum-base stations located within the mobile-cellular system for communicating the data to the plurality of spread-spectrum units, each of said spread-spectrum-base stations having base-sector means for sectoring a geographical area covered by said spread-spectrum-base station into at least two sectors, with said spread-spectrum-base station, for each sector, including, base-converting means for converting the format of the data into a form for output to communicate over radio waves; base-spread-spectrum-processing means for spread-spectrum-processing the converted data; and base-transmitting means for transmitting across cellular bandwidth the spread-spectrum-processed-converted data from the spread-spectrum-base station to a spread-spectrum unit as a spread-spectrum signal; a plurality of spread-spectrum units, each of said spread-spectrum units including, a unit antenna for receiving the spread-spectrum signal as a received signal; and a unit-spread-spectrum-detection means, coupled to said unit antenna, for recovering the data in the spread-spectrum signal communicated from said spread-spectrum-base station, said unit-spread-spectrum-detection means including unit-filtering means for filtering the received spread-spectrum signal and unit-spread-spectrum-demodulating means for despreading the received spread-spectrum signal.
Claim 3
Dependent Claim
32 words
The spread-spectrum CDMA communications system as set forth in claim 1 wherein said unit-spread-spectrum-detection means includes means for converting the format of the data into a form for output to a user.
Claim 4
Dependent Claim
42 words
The spread-spectrum CDMA communications system as set forth in claim 1 wherein said unit-spread-spectrum-demodulating means includes means for storing a local chip code for comparison to received spread-spectrum signal for recovering the data sent from said spread-spectrum-base station to said spread-spectrum unit.
Claim 5
Dependent Claim
26 words
The spread-spectrum CDMA communications system as set forth in claim 1 wherein said unit-spread-spectrum-demodulating means includes means for synchronizing said unit-spread-spectrum-detection means to the received signal.
Claim 6
Dependent Claim
33 words
The spread-spectrum CDMA communications system as set forth in claim 1 wherein said unit-spread-spectrum-demodulating means at each spread-spectrum-unit includes means for processing the data for particular spread-spectrum units with a selected chip code.
Claim 7
Dependent Claim
19 words
The spread-spectrum CDMA communications system as set forth in claim 1 wherein the unit-spread-spectrum-detection means includes a noncoherent detector.
Claim 8
Dependent Claim
19 words
The spread-spectrum CDMA communications system as set forth in claim 1 wherein the unit-detection means includes a noncoherent detector.
Claim 9
Dependent Claim
19 words
The spread-spectrum CDMA communications system as set forth in claim 6 wherein the unit-spread-spectrum-detection means includes a coherent detector.
Claim 10
Dependent Claim
228 words
A spread-spectrum code division multiple access (CDMA) communications system for communicating data between a plurality of spread-spectrum units, said spread-spectrum CDMA communications system located within a same geographical region as occupied by a mobile-cellular system with each cell of the mobile-cellular system having a cellular bandwidth divided into predetermined channels and guard bands between the predetermined channels, and having cellular users communicating on the predetermined channels, said spread-spectrum CDMA communications system communicating on the predetermined channels, comprising: a plurality of spread-spectrum units, located within a same geographical region as occupied by a mobile-cellular system for communicating the data to a plurality of users, each of aid spread-spectrum units including, unit-converting means for converting data to a form for output to communicate over radio waves; unit-spread-spectrum-processing means for spread-spectrum-processing the converted data; and unit-transmitting means for transmitting across the cellular bandwidth, the spread-spectrum-processed-converted data from said spread-spectrum unit to a spread-spectrum-base station as a spread-spectrum signal; a spread-spectrum-base station including, a base antenna for receiving the spread-spectrum signal; base-sector means coupled to said base antenna for sectoring the received spread-spectrum signal from the predetermined sectors; base-comb-filtering means for filtering the received spread-spectrum signal at the predetermined channels; and base-detection means, coupled to said base-sector means, for recovering the data communicated from said spread-spectrum unit, said base-detection means including base-despreading means for demodulating the data from the received spread-spectrum signal.
Claim 11
Dependent Claim
228 words
A spread-spectrum code division multiple access (CDMA) communications system for communicating data between a plurality of spread-spectrum units, said spread-spectrum CDMA communications system located within a same geographical region as occupied by a mobile-cellular system with each cell of the mobile-cellular system having a cellular bandwidth divided into predetermined channels and guard bands between the predetermined channels, and having cellular users communicating on the predetermined channels, said spread-spectrum CDMA communications system communicating on the predetermined channels, comprising: a plurality of spread-spectrum units, located within a same geographical region as occupied by a mobile-cellular system for communicating the data to a plurality of users, each of aid spread-spectrum units including, unit-converting means for converting data to a form for output to communicate over radio waves; unit-spread-spectrum-processing means for spread-spectrum-processing the converted data; and unit-transmitting means for transmitting across the cellular bandwidth, the spread-spectrum-processed-converted data from said spread-spectrum unit to a spread-spectrum-base station as a spread-spectrum signal; a spread-spectrum-base station including, a base antenna for receiving the spread-spectrum signal; base-sector means coupled to said base antenna for sectoring the received spread-spectrum signal from the predetermined sectors; base-comb-filtering means for filtering the received spread-spectrum signal at the predetermined channels; and base-detection means, coupled to said base-sector means, for recovering the data communicated from said spread-spectrum unit, said base-detection means including base-despreading means for demodulating the data from the received spread-spectrum signal.
Claim 12
Dependent Claim
32 words
The spread-spectrum CDMA communications system as set forth in claim 9 wherein said base-detection means includes means for converting the format of the data into a form for output to a user.
Claim 13
Dependent Claim
43 words
The spread-spectrum CDMA communications system as set forth in claim 9 wherein said base-despreading means includes means for storing a local chip code for comparison to the received spread-spectrum signal for recovering the data sent from said spread-spectrum unit to said spread-spectrum-base station.
Claim 14
Dependent Claim
26 words
The spread-spectrum CDMA communications system as set forth in claim 9 wherein said base-despreading means includes means for synchronizing said base-despreading means to the received signal.
Claim 15
Dependent Claim
33 words
The spread-spectrum CDMA communications system as set forth in claim 9 wherein said base-despreading means at said spread-spectrum-base station includes means for processing the data for particular spread-spectrum units with a selected-chip code.
Claim 16
Dependent Claim
23 words
The spread-spectrum CDMA communications system as set forth in claim 9 wherein said unit-transmitter means transmits the data in a time division format.
Claim 17
Dependent Claim
148 words
A spread-spectrum receiver for use with a spread-spectrum-base station of a spread-spectrum code division multiple access (CDMA) communications system for communicating data, between a plurality of spread-spectrum units, said spread-spectrum communications system located within a same geographical region as occupied by a mobile-cellular system with each cell of the mobile-cellular system having a cellular bandwidth divided into a plurality of predetermined channels and guard bands between said plurality of predetermined channels, and having a plurality of cellular users communicating on said plurality of predetermined channels, said spread-spectrum CDMA communications system communicating on said plurality of predetermined channels, said spread-spectrum receiver comprising: a base antenna; base-sector means for sectoring a spread-spectrum signal from predetermined sectors; base-comb-filtering means for notch filtering a received spread-spectrum signal at the plurality of predetermined channels; and base-detection means for recovering the data in the received spread-spectrum signal communicated from said plurality of spread-spectrum units.
Claim 18
Dependent Claim
148 words
A spread-spectrum receiver for use with a spread-spectrum-base station of a spread-spectrum code division multiple access (CDMA) communications system for communicating data, between a plurality of spread-spectrum units, said spread-spectrum communications system located within a same geographical region as occupied by a mobile-cellular system with each cell of the mobile-cellular system having a cellular bandwidth divided into a plurality of predetermined channels and guard bands between said plurality of predetermined channels, and having a plurality of cellular users communicating on said plurality of predetermined channels, said spread-spectrum CDMA communications system communicating on said plurality of predetermined channels, said spread-spectrum receiver comprising: a base antenna; base-sector means for sectoring a spread-spectrum signal from predetermined sectors; base-comb-filtering means for notch filtering a received spread-spectrum signal at the plurality of predetermined channels; and base-detection means for recovering the data in the received spread-spectrum signal communicated from said plurality of spread-spectrum units.
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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) | 2003-01-03 | 2003-07-05 | 2004-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-03 | 2007-07-05 | 2008-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-03 | 2011-07-05 | 2012-01-04 | $7700.00 | Window Closed / Lapsed |