US7190683B2 — Two-dimensional channel bonding in a hybrid CDMA/…

Claim 1

Independent Claim 166 words

A method for operating a communication system, comprising steps of: defining the system as a combined Code Division Multiple Access CDMA and Frequency Division Multiple Access FDMA system, wherein CDMA is used within each FDMA sub-channel, and a plurality of PN code channels are available in each of the FDMA sub-channels; using at least one base station and a plurality of subscriber stations, where the at least one base station and each of the plurality of subscriber stations have a plurality of frequency agile and PN code agile data modulators and demodulators, and wherein each of the frequency agile and PN code agile data modulators and demodulators can be selectively tuned to separate PN code channels operating within the FDMA sub-channels; determining current transmission requirements based, at least in part, on operating conditions; and selecting a number of FDMA sub-channels sufficient to meet current transmission requirements, wherein the system operates as a variable bandwidth system as the number of FDMA sub-channels varies due to transmission requirements.

Claim 2

Independent Claim 166 words

A method for operating a communication system, comprising steps of: defining the system as a combined Code Division Multiple Access CDMA and Frequency Division Multiple Access FDMA system, wherein CDMA is used within each FDMA sub-channel, and a plurality of PN code channels are available in each of the FDMA sub-channels; using at least one base station and a plurality of subscriber stations, where the at least one base station and each of the plurality of subscriber stations have a plurality of frequency agile and PN code agile data modulators and demodulators, and wherein each of the frequency agile and PN code agile data modulators and demodulators can be selectively tuned to separate PN code channels operating within the FDMA sub-channels; determining current transmission requirements based, at least in part, on operating conditions; and selecting a number of FDMA sub-channels sufficient to meet current transmission requirements, wherein the system operates as a variable bandwidth system as the number of FDMA sub-channels varies due to transmission requirements.

Claim 3

Dependent Claim 32 words

A method as in claim 1 , wherein the use of both CDMA and FDMA together provides an improved concentration efficiency by making a larger pool of bandwidth available to each user.

Claim 4

Dependent Claim 27 words

A method as in claim 1 , further comprising: performing channel bonding in both code and frequency space by bonding PN code channels from separate FDMA sub-channels.

Claim 5

Dependent Claim 146 words

A synchronous Code Division Multiple Access CDMA and Frequency Division Multiple Access FDMA communications system, comprising: a plurality of FDMA sub-channels, wherein CDMA is used within each of the FDMA sub-channels; a base site comprising a transmitter for transmitting a waveform and further comprising a plurality of frequency agile and PN code agile data modulators having an output coupled to a radio channel, wherein the transmitter is operable to perform channel bonding in both frequency space and code space by bonding PN code channels from different FDMA sub-channels, forming an effective channel; and a subscriber unit comprising a receiver for receiving the transmitted waveform from the radio channel and further comprising a plurality of frequency agile and PN code agile data demodulators, wherein the subscriber unit is operable to receive data transmitted in the effective channel formed by bonding PN code channels from different FDMA sub-channels.

Claim 6

Dependent Claim 146 words

A synchronous Code Division Multiple Access CDMA and Frequency Division Multiple Access FDMA communications system, comprising: a plurality of FDMA sub-channels, wherein CDMA is used within each of the FDMA sub-channels; a base site comprising a transmitter for transmitting a waveform and further comprising a plurality of frequency agile and PN code agile data modulators having an output coupled to a radio channel, wherein the transmitter is operable to perform channel bonding in both frequency space and code space by bonding PN code channels from different FDMA sub-channels, forming an effective channel; and a subscriber unit comprising a receiver for receiving the transmitted waveform from the radio channel and further comprising a plurality of frequency agile and PN code agile data demodulators, wherein the subscriber unit is operable to receive data transmitted in the effective channel formed by bonding PN code channels from different FDMA sub-channels.

Claim 7

Dependent Claim 45 words

A CDMA and FDMA communications system as in claim 4 , wherein there are N modulators and N demodulators each operable for communicating at data rates that are power of two multiples of a basic rate on a plurality of frequency subchannels within a channel.

Claim 8

Dependent Claim 48 words

A CDMA and FDMA communications system as in claim 5 , wherein said N modulators and N demodulators operate with power of two multiples of the basic rate from a minimum rate to a maximum rate at a granularity that is an integer multiple of the basic rate.

Claim 9

Dependent Claim 74 words

A CDMA and FDMA communications system as in claim 4 , wherein statistical concentration is achieved when the system has Y Mbps of aggregate capacity allocatable to X users simultaneously at rates Y/X Mbps each, and by tuning said modulators and demodulators to any one of Z frequency subchannels, the useable bandwidth is Z times the Y Mbps bandwidth of any one channel, and Z*X users are supported simultaneously at rates of Y/X Mbps.

Claim 10

Dependent Claim 51 words

A CDMA and FDMA communications system as in claim 4 , wherein a bandwidth of any one subchannel is X MHz, and at least some of said plurality of modulators and demodulators are tuned to different ones of contiguous or non-contiguous X MHz sub-channels within a Y MHz channel, where Y>X.

Claim 11

Dependent Claim 15 words

A CDMA and FDMA communications system as in claim 8 , wherein X=3.5 and Y=14.

Claim 12

Dependent Claim 24 words

A CDMA and FDMA communications system as in claim 4 , wherein input data to said plurality of modulators is a punctured convolutional code.

Claim 13

Dependent Claim 34 words

A CDMA and FDMA communications system as in claim 4 , wherein input data to said plurality of modulators is a rate 1/2, constraint length 7 code that is punctured to increase the rate.

Claim 14

Dependent Claim 22 words

A CDMA and FDMA communications system as in claim 11 , wherein the puncturing rate is made adaptive to mitigate fading conditions.

Claim 15

Dependent Claim 31 words

A CDMA and FDMA communications system as in claim 11 , wherein said output of said modulators is coupled to said radio channel through an end-to-end raised-cosine Nyquist pulse shape filter.

Claim 16

Independent Claim 108 words

A method for operating a communication system, comprising steps of: defining the system as a combined Code Division Multiple Access CDMA and Frequency Division Multiple Access system; and using a variable bandwidth waveform with multiple bonded transmitters and receivers that are each agile in both frequency and code to provide a variable bandwidth and variable rate multiple access system, wherein channel bonding across both code space and frequency space enable the system to operate in at least one of a variable, contiguous or non-contiguous bandwidth at a finely variable rate, the channel bonding across both code space and frequency space bonding CDMA channels from different FDMA sub-bands together.

Claim 17

Independent Claim 108 words

A method for operating a communication system, comprising steps of: defining the system as a combined Code Division Multiple Access CDMA and Frequency Division Multiple Access system; and using a variable bandwidth waveform with multiple bonded transmitters and receivers that are each agile in both frequency and code to provide a variable bandwidth and variable rate multiple access system, wherein channel bonding across both code space and frequency space enable the system to operate in at least one of a variable, contiguous or non-contiguous bandwidth at a finely variable rate, the channel bonding across both code space and frequency space bonding CDMA channels from different FDMA sub-bands together.

Claim 18

Dependent Claim 15 words

The method of claim 14 wherein channel bonding across frequency space bonds FDMA sub-bands together.

Claim 19

Independent Claim 118 words

A method for operating a communications system, comprising steps of: defining the system as a combined Code Division and Frequency Division Multiple Access FDMA system, wherein CDMA is used in each FDMA sub-band; using a variable bandwidth waveform with multiple bonded transmitters and receivers that are each agile in both frequency and code to provide a variable bandwidth and variable rate multiple access system, wherein channel bonding occurs across both code space and frequency space, the channel bonding across both code space and frequency space enabling the communication system to operate at a finely variable rate in a variable bandwidth comprised of contiguous FDMA sub-bands, wherein the number of FDMA sub-bands used varies in dependence on operating conditions.

Claim 20

Independent Claim 118 words

A method for operating a communications system, comprising steps of: defining the system as a combined Code Division and Frequency Division Multiple Access FDMA system, wherein CDMA is used in each FDMA sub-band; using a variable bandwidth waveform with multiple bonded transmitters and receivers that are each agile in both frequency and code to provide a variable bandwidth and variable rate multiple access system, wherein channel bonding occurs across both code space and frequency space, the channel bonding across both code space and frequency space enabling the communication system to operate at a finely variable rate in a variable bandwidth comprised of contiguous FDMA sub-bands, wherein the number of FDMA sub-bands used varies in dependence on operating conditions.

Claim 21

Independent Claim 120 words

A method for operating a communication system, comprising steps of: defining the system as a combined Code Division and Frequency Division Multiple Access FDMA system, wherein CDMA is used in each FDMA sub-band; using a variable bandwidth waveform with multiple bonded transmitters and receivers that are each agile in both frequency and code to provide a variable bandwidth and variable rate multiple access system, wherein channel bonding occurs across both code space and frequency space, the channel bonding across both code space and frequency space and frequency space enabling the system to operate at a finely variable rate in a variable bandwidth comprised of non-contiguous FDMA sub-bands, wherein the number of FDMA sub-bands used varies in dependence on operating conditions.

Claim 22

Independent Claim 120 words

A method for operating a communication system, comprising steps of: defining the system as a combined Code Division and Frequency Division Multiple Access FDMA system, wherein CDMA is used in each FDMA sub-band; using a variable bandwidth waveform with multiple bonded transmitters and receivers that are each agile in both frequency and code to provide a variable bandwidth and variable rate multiple access system, wherein channel bonding occurs across both code space and frequency space, the channel bonding across both code space and frequency space and frequency space enabling the system to operate at a finely variable rate in a variable bandwidth comprised of non-contiguous FDMA sub-bands, wherein the number of FDMA sub-bands used varies in dependence on operating conditions.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2010-03-12	2010-09-11	2011-03-13	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2014-03-12	2014-09-11	2015-03-13	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2018-03-12	2018-09-11	2019-03-13	$7700.00	Window Closed / Lapsed

Two-dimensional channel bonding in a hybrid CDMA/FDMA fixed wireless access system to provide finely variable rate channels

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