US7324434B2 — Radio transmission system and method, and transmi…

Claim 1

Independent Claim 109 words

An orthogonal frequency and code division multiplexing (OFDM) radio transmission system configured for parallelly transmitting identical information via a plurality of sub-carriers, comprising: a transmitter configured to transmit an OFDM signal to a receiver and including converting means for parallelly converting channel-coded information according to symbols transmitted simultaneously; spreading means for spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence having a spreading factor determined based on a plurality of changeable spreading factors; and spreading factor determining means for determining said spreading factor based on a command provided by a device external to the transmitter.

Claim 2

Dependent Claim 109 words

An orthogonal frequency and code division multiplexing (OFDM) radio transmission system configured for parallelly transmitting identical information via a plurality of sub-carriers, comprising: a transmitter configured to transmit an OFDM signal to a receiver and including converting means for parallelly converting channel-coded information according to symbols transmitted simultaneously; spreading means for spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence having a spreading factor determined based on a plurality of changeable spreading factors; and spreading factor determining means for determining said spreading factor based on a command provided by a device external to the transmitter.

Claim 3

Dependent Claim 28 words

The radio transmission system according to claim 1 , wherein the spreading means spreads the sequence of parallelized symbols in both the frequency direction and the time direction.

Claim 4

Dependent Claim 37 words

The radio transmission system according to claim 1 , wherein said spreading factor determining means determines a condition of a propagation path between the transmitter and the receiver and determines said spreading factor according to the condition.

Claim 5

Dependent Claim 27 words

The radio transmission system according to claim 3 , wherein said spreading factor determining means obtains a delay spread and uses said delay spread as said condition.

Claim 6

Dependent Claim 41 words

The radio transmission system according to claim 1 , wherein said spreading factor determining means determines said spreading factor according to one of a cell configuration and the spreading factor, included in the command from the device external to the transmitter.

Claim 7

Dependent Claim 55 words

The radio transmission system according to claim 1 , wherein the spreading factor is determined to be a numerical value greater than 1 if a corresponding cell environment is a multi-cell environment, and the spreading factor is determined to be a numerical value equal to 1 if the corresponding cell environment is a single-cell environment.

Claim 8

Dependent Claim 43 words

The radio transmission system according to claim 1 , wherein the spreading factor is determined based on control information representing whether a corresponding cell environment is a multi-cell environment or a single-cell environment, and the control information is transmitted from a superordinate station.

Claim 9

Dependent Claim 141 words

An orthogonal frequency and code division multiplexing (OFDM) radio transmission system configured for parallelly transmitting identical information via a plurality of sub-carriers, comprising: a transmitter including converting means for parallelly converting channel-coded information according to symbols transmitted simultaneously, and spreading means for spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence having a spreading factor determined based on a plurality of changeable spreading factors; and a receiver including spreading factor control receiving means for separating a corresponding OFDM signal received at the receiver into at least one of sub-carriers and time-axial symbols and for integrating coherently said at least one of sub-carriers and time-axial symbols, the number of which being equivalent to the spreading factor by, using a channel estimation value and a specific spreading code sequence.

Claim 10

Dependent Claim 141 words

An orthogonal frequency and code division multiplexing (OFDM) radio transmission system configured for parallelly transmitting identical information via a plurality of sub-carriers, comprising: a transmitter including converting means for parallelly converting channel-coded information according to symbols transmitted simultaneously, and spreading means for spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence having a spreading factor determined based on a plurality of changeable spreading factors; and a receiver including spreading factor control receiving means for separating a corresponding OFDM signal received at the receiver into at least one of sub-carriers and time-axial symbols and for integrating coherently said at least one of sub-carriers and time-axial symbols, the number of which being equivalent to the spreading factor by, using a channel estimation value and a specific spreading code sequence.

Claim 11

Dependent Claim 34 words

The radio transmission system according to claim 8 , wherein said spreading factor control receiving means separates the received signal into both sub-carriers and time-axial symbols and integrating coherently both sub-carriers and time-axial symbols.

Claim 12

Dependent Claim 39 words

The radio transmission system according to claim 8 , wherein said spreading factor control receiving means determines said spreading factor on the basis of control information included in a control signal sent from the transmitter as a communicating correspondent.

Claim 13

Dependent Claim 41 words

The radio transmission system according to claim 10 , wherein said spreading factor determining means determines said spreading factor according to either information indicating a cell configuration or information designating a spreading factor, included in the control signal from the transmitter.

Claim 14

Dependent Claim 96 words

An orthogonal frequency and code division multiplexing (OFDM) radio transmission method for parallelly transmitting identical information via a plurality of sub-carriers, comprising: transmitting an OFDM signal from a transmitter to a receiver, including: parallelly converting channel-coded information according to symbols transmitted simultaneously; spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence having a spreading factor determined based on a plurality of changeable spreading factors; and determining said spreading factor on the basis of a command from a device external to the transmitter.

Claim 15

Dependent Claim 96 words

An orthogonal frequency and code division multiplexing (OFDM) radio transmission method for parallelly transmitting identical information via a plurality of sub-carriers, comprising: transmitting an OFDM signal from a transmitter to a receiver, including: parallelly converting channel-coded information according to symbols transmitted simultaneously; spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence having a spreading factor determined based on a plurality of changeable spreading factors; and determining said spreading factor on the basis of a command from a device external to the transmitter.

Claim 16

Dependent Claim 28 words

The radio transmission method according to claim 12 , the spreading further comprising: spreading the sequence of parallelized symbols in both the frequency direction and the time direction.

Claim 17

Dependent Claim 33 words

The radio transmission method according to claim 12 , further comprising: determining a condition of a propagation path between the transmitter and the receiver and determining the spreading factor according to the condition.

Claim 18

Dependent Claim 22 words

The radio transmission method according to claim 14 , further comprising: obtaining a delay spread using said delay spread as said condition.

Claim 19

Dependent Claim 32 words

The radio transmission method according to claim 12 , further comprising: determining said spreading factor according to one of a cell configuration and the spreading factor, included in the command from outside.

Claim 20

Dependent Claim 55 words

The radio transmission method according to claim 12 , wherein the spreading factor is determined to be a numerical value greater than 1 if a corresponding cell environment is a multi-cell environment, and the spreading factor is determined to be a numerical value equal to 1 if the corresponding cell environment is a single-cell environment.

Claim 21

Dependent Claim 43 words

The radio transmission method according to claim 12 , wherein the spreading factor is determined based on control information representing whether a corresponding cell environment is a multi-cell environment or a single-cell environment, and the control information is transmitted from a superordinate station.

Claim 22

Dependent Claim 126 words

An orthogonal frequency and code division multiplexing (OFDM) radio transmission method for parallelly transmitting identical information via a plurality of sub-carriers, comprising: transmitting an OFDM signal: parallelly converting channel-coded information according to symbols transmitted simultaneously, and spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence having a spreading factor determined based on a plurality of changeable spreading factors; and receiving the OFDM signal, including separating the received OFDM signal into at least one of sub-carriers and time-axial symbols, and integrating coherently the at least one of sub-carriers and time-axial symbols the number of which is equivalent to the spreading factor by, using a channel estimation value and a specific spreading code sequence.

Claim 23

Dependent Claim 126 words

An orthogonal frequency and code division multiplexing (OFDM) radio transmission method for parallelly transmitting identical information via a plurality of sub-carriers, comprising: transmitting an OFDM signal: parallelly converting channel-coded information according to symbols transmitted simultaneously, and spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence having a spreading factor determined based on a plurality of changeable spreading factors; and receiving the OFDM signal, including separating the received OFDM signal into at least one of sub-carriers and time-axial symbols, and integrating coherently the at least one of sub-carriers and time-axial symbols the number of which is equivalent to the spreading factor by, using a channel estimation value and a specific spreading code sequence.

Claim 24

Dependent Claim 60 words

The radio transmission method according to claim 19 , further comprising: separating the received OFDM signal into both sub-carriers and time-axial symbols and integrating coherently both sub-carriers and time-axial symbols the number of which is equivalent to the spreading factor determined based on the plurality of changeable spreading factors, using a channel estimation value and a specific spreading code sequence.

Claim 25

Dependent Claim 34 words

The radio transmission method according to claim 19 , further comprising: determining said spreading factor on the basis of control information included in a control signal sent from the transmitter as a communicating correspondent.

Claim 26

Dependent Claim 37 words

The radio transmission method according to claim 21 , further comprising: determining said spreading factor according to either information indicating a cell configuration or information designating a spreading factor, included in the control signal from the transmitter.

Claim 27

Dependent Claim 95 words

An orthogonal frequency and code division multiplexing (OFDM) transmitter configured for parallelly transmitting identical information via a plurality of sub-carriers, comprising: converting means for parallelly converting channel-coded information according to symbols transmitted simultaneously; spreading means for spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence having a spreading factor determined based on a plurality of changeable spreading factors; and spreading factor determining means for determining said spreading factor on the basis of a command from a device external to the transmitter.

Claim 28

Dependent Claim 95 words

An orthogonal frequency and code division multiplexing (OFDM) transmitter configured for parallelly transmitting identical information via a plurality of sub-carriers, comprising: converting means for parallelly converting channel-coded information according to symbols transmitted simultaneously; spreading means for spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence having a spreading factor determined based on a plurality of changeable spreading factors; and spreading factor determining means for determining said spreading factor on the basis of a command from a device external to the transmitter.

Claim 29

Dependent Claim 27 words

The transmitter apparatus according to claim 23 , wherein the spreading means spreads the sequence of parallelized symbols in both the frequency direction and the time direction.

Claim 30

Dependent Claim 39 words

The transmitter apparatus according to claim 23 , the spreading factor determining means further comprises: means for determining a condition of a propagation path between the transmitter and the receiver and determining the spreading factor according to the condition.

Claim 31

Dependent Claim 29 words

The transmitter apparatus according to claim 25 , wherein said spreading factor determining means includes means for obtaining a delay spread and using said delay spread as said condition.

Claim 32

Dependent Claim 38 words

The transmitter apparatus according to claim 23 , wherein said spreading factor determining means includes means for determining said spreading factor according to one of a cell configuration and the spreading factor, included in the command from outside.

Claim 33

Dependent Claim 54 words

The transmitter apparatus according to claim 23 , wherein the spreading factor is determined to be a numerical value greater than 1 if a corresponding cell environment is a multi-cell environment, and the spreading factor is determined to be a numerical value equal to 1 if the corresponding cell environment is a single-cell environment.

Claim 34

Dependent Claim 42 words

The transmitter apparatus according to claim 23 , wherein the spreading factor is determined based on control information representing whether a corresponding cell environment is a multi-cell environment or a single-cell environment, and the control information is transmitted from a superordinate station.

Claim 35

Dependent Claim 92 words

A receiver apparatus configured to receive a signal radio-transmitted using an orthogonal frequency and code division multiplexing transmission scheme from a transmitter apparatus, said receiver apparatus comprising: spreading factor control receiving means for separating the receive signal received at the receiver, into at least one of sub-carriers and time-axial symbols and integrating coherently at least one of sub-carriers and time-axial symbols the number of which is equivalent to a first spreading factor determined based on a plurality of changeable spreading factors, using a channel estimation value and a specific spreading code sequence.

Claim 36

Dependent Claim 92 words

A receiver apparatus configured to receive a signal radio-transmitted using an orthogonal frequency and code division multiplexing transmission scheme from a transmitter apparatus, said receiver apparatus comprising: spreading factor control receiving means for separating the receive signal received at the receiver, into at least one of sub-carriers and time-axial symbols and integrating coherently at least one of sub-carriers and time-axial symbols the number of which is equivalent to a first spreading factor determined based on a plurality of changeable spreading factors, using a channel estimation value and a specific spreading code sequence.

Claim 37

Dependent Claim 69 words

The receiver apparatus according to claim 30 , wherein said spreading factor control receiving means for separating the receive signal received at the receiver, into both sub-carriers and time-axial symbols and integrating coherently both sub-carriers and time-axial symbols the number of which is equivalent to a first spreading factor determined based on a plurality of changeable spreading factors, using a channel estimation value and a specific spreading code sequence.

Claim 38

Dependent Claim 45 words

The receiver apparatus according to claim 30 , wherein said spreading factor control receiving means comprises spreading factor determining means for determining said first spreading factor on the basis of control information included in a control signal sent from the transmitter as a communicating correspondent.

Claim 39

Dependent Claim 41 words

The receiver apparatus according to claim 32 , wherein said spreading factor determining means determines said first spreading factor according to either information indicating a cell configuration or information designating a spreading factor, included in the control signal from the transmitter.

Claim 40

Dependent Claim 54 words

The receiver apparatus according to claim 30 , wherein the spreading factor is determined to be a numerical value greater than 1 if a corresponding cell environment is a multi-cell environment, and the spreading factor is determined to be a numerical value equal to 1 if the corresponding cell environment is a single-cell environment.

Claim 41

Dependent Claim 42 words

The receiver apparatus according to claim 30 , wherein the spreading factor is determined based on control information representing whether a corresponding cell environment is a multi-cell environment or a single-cell environment, and the control information is transmitted from a superordinate station.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2011-01-28	2011-07-30	2012-01-29	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2015-01-28	2015-07-30	2016-01-29	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2019-01-28	2019-07-30	2020-01-29	$7700.00	Window Closed / Lapsed

Radio transmission system and method, and transmitter apparatus and receiver apparatus used in the radio transmission system

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