CN100521596C - Adaptive channelization scheme for high throughput multicarrier systems - Google Patents
Adaptive channelization scheme for high throughput multicarrier systems Download PDFInfo
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- CN100521596C CN100521596C CNB2004100921703A CN200410092170A CN100521596C CN 100521596 C CN100521596 C CN 100521596C CN B2004100921703 A CNB2004100921703 A CN B2004100921703A CN 200410092170 A CN200410092170 A CN 200410092170A CN 100521596 C CN100521596 C CN 100521596C
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Abstract
Adaptive channelization is achieved in a high throughput multicarrier system by first subdividing a high throughput channel into a number of frequency sub-channels. A channelization decision may then be made within a device as to which of the sub-channels to use for a corresponding high throughput wireless link based on channel state information.
Description
The application requires on January 12nd, 2004 to submit to, and sequence number is the rights and interests of 60/536071 autograph for the U.S. Provisional Application of " ASYSTEM APPARATUS AND ASSOCIATED METHODSFOR HIGHTHROUGHPUT WIRELESS NETWORKING (being used for the system of high throughput wireless networking technology and relevant method) ".
Technical field
Present invention relates in general to radio communication, especially relate to the channelization scheme that in wireless system, uses.
Background technology
In the multi-carrier communication technology, made and made great efforts to obtain higher integrated communication throughput such as OFDM (OFDM) system and discrete multi-tone (DMT) system at some.In some occasion,, obtain higher throughput by bandwidth that increases multi-carrier signal and/or the number that increases the subcarrier that uses in the multi-carrier signal.For example, in some Wireless Networking technology,, equipment development formed a team together so that obtain the more technology of high-throughput channel for allowing several OFDM channels (such as several IEEE802.11a channels) based on OFDM.When realizing that this channel is formed a team, have such possibility: promptly the miscellaneous equipment of communication may be at the channel of forming a team (for example on one or more in the channel of forming a team, in wireless network, close in the basic service sets (BSS)) in produce to disturb, this disturbs the quality of entail dangers to respective communication.
Summary of the invention
According to a kind of wireless device of the present invention, comprising: the adaptive channelization controller, determine that based on channel condition information in a plurality of predetermined subchannels which is used for supporting the multi-carrier-wave wireless link; And receiver circuit, based on handling the multi-carrier signal that is associated with described multi-carrier-wave wireless link that receives by the control information of described adaptive channelization controller output; Wherein, described receiver circuit comprises: the frequency demodulation multiplexer, based on frequency the described multi-carrier signal that receives is divided into a plurality of signal sections, and described a plurality of signal sections are corresponding to described a plurality of predetermined subchannels; And a plurality of Fourier transformation unit, be used for handling independently the described a plurality of signal sections by described frequency demodulation multiplexer output, described a plurality of Fourier transformation unit comprise second Fourier transformation unit that is used to handle first Fourier transformation unit of first signal section and is used to handle the secondary signal part at least; And the self adaptation parallel-to-serial converter, be used for receiving output stream, and described output stream merged into serial flow based on control information from described adaptive channelization controller from described a plurality of Fourier transformation unit.
According to another kind of wireless device of the present invention, it comprises: the frequency demodulation multiplexer, the frequency demodulation multiplexer is divided into a plurality of parts based on frequency with the multi-carrier signal that receives, and described a plurality of parts also comprise first and second portion at least corresponding to the subchannel of a plurality of preset frequencies; First Fourier transformation unit is transformed into frequency domain representation with the described first of described multi-carrier signal from time-domain representation; Second Fourier transformation unit is transformed into frequency domain representation with the described second portion of described multi-carrier signal from time-domain representation mutually independently with the described first of described multi-carrier signal; And self adaptation parallel-to-serial converter, be used for receiving output stream from described at least first and second Fourier transformation unit, and described output stream is merged into serial flow based on the control information that receives from the adaptive channelization controller, described adaptive channelization controller determines that based on channel condition information in described a plurality of preset frequency subchannel which is used for supporting the multi-carrier-wave wireless link.
A method according to the present present invention comprises: obtain the channel condition information that is associated with the channel with a plurality of subchannels; Determine that based on described channel condition information which subchannel in described a plurality of subchannel is used for Radio Link, and generate the subchannel Adapted information based on described information; The subchannel Adapted information is sent to receiver circuit so that when handling, use with multicarrier received signal that described Radio Link is associated; Described multicarrier received signal is divided into a plurality of frequency subchannels components; In described a plurality of frequency subchannels components each is individually transformed to frequency domain representation from time-domain representation, wherein indivedual conversion generate a plurality of output streams, and described a plurality of output streams comprise the first-class of the first frequency subchannel component that is used for described a plurality of frequency subchannels components and second stream that is used for the second frequency subchannel component of described a plurality of frequency subchannels components at least; And, make described output stream merge into serial flow based on the described a plurality of output streams of described subchannel Adapted information self adaptation parallel serial conversion.
According to another kind of method of the present invention, comprising: the multi-carrier signal that receives is divided into a plurality of frequency subchannels components; In described a plurality of frequency subchannels components each is individually transformed to frequency domain representation from time-domain representation; And based on the control information that receives from the adaptive channelization controller, to convert single serial flow to from the described frequency domain representation of the described a plurality of frequency subchannels component gained of conversion individually, which subchannel that described control information is discerned in a plurality of available subchannels is used to Radio Link.
A system in accordance with the present invention, it comprises: the adaptive channelization controller, it determines that based on channel condition information in a plurality of predetermined subchannels which is used for supporting the multi-carrier-wave wireless link; At least one dipole antenna, it receives the multi-carrier signal that is associated with described Radio Link; And receiver circuit, it is based on handling the described multi-carrier signal that receives by the control information of described adaptive channelization controller output; Wherein, described receiver circuit comprises: the frequency demodulation multiplexer, based on frequency the described multi-carrier signal that receives is divided into a plurality of signal sections, and described a plurality of signal sections are corresponding to described a plurality of predetermined subchannels; And a plurality of Fourier transformation unit, be used for handling independently the described a plurality of signal sections by described frequency demodulation multiplexer output, described a plurality of Fourier transformation unit comprise second Fourier transformation unit that is used to handle first Fourier transformation unit of first signal section and is used to handle the secondary signal part at least; And the self adaptation parallel-to-serial converter, be used for receiving output stream, and described output stream merged into serial flow based on control information from described adaptive channelization controller from described a plurality of Fourier transformation unit.
Description of drawings
Fig. 1 is the block diagram of explanation according to the exemplary wireless device of the embodiment of the invention;
Fig. 2,3 and 4 is the channel use figure of explanation according to the possible operation situation of the high-throughput communication equipment of the embodiment of the invention;
Fig. 5 is used for realizing at multicarrier equipment the flow chart of adaptive channelization method according to the embodiment of the invention for explanation.
Embodiment
In following detailed description, be illustrated in the accompanying drawing that wherein can implement specific embodiment of the present invention with reference to the mode that illustrates by way of example.These embodiment are described enough in detail, make those of ordinary skills can implement the present invention.Should be appreciated that various embodiment of the present invention, though different, needn't be mutually exclusive.For example, can realize in other embodiments in conjunction with embodiment specific function described here, structure or a feature, and this does not break away from the spirit and scope of the present invention.In addition, should be appreciated that the position of discrete component or arrangement can be modified among each disclosed embodiment, and this does not break away from the spirit and scope of the present invention.Therefore following detailed description is not thought the meaning that limits, and scope of the present invention only is limited to the appended claims, and is explained rightly with the gamut of the equivalent of the claim that is authorized to.In the accompanying drawings, identical label refers to same or analogous functional in whole several figure.
The adaptive channelization technology and the structure that the present invention relates in multi-carrier communication, use.A high-throughput (HT) multicarrier communication channel is divided into a plurality of frequency subchannels.The division of communication channel allows single subchannel to be separated to handle.Exercisable communication equipment can determine which available subchannel is specific radio link use, and channel condition information wherein can be indicated the use of current channel based on for example channel condition information in this system.Communication equipment then communicates with the remote end entity of using the subchannel of discerning.In at least one embodiment, the frequency subchannels that is used for forming the high throughput multicarrier channel is predefined channel.For example, in the realization of using under the Wireless Networking environment, the high throughput multicarrier channel is made of IEEE 802.11a (IEEE Std 802.11a-1999) OFDM (OFDM) channel that uses a plurality of 20 megahertzes (MHz).Replacedly, can use many other arrangements that are used to define frequency subchannels.Be divided into a plurality of frequency subchannels of the reason of can coverlet staying alone by multiple carrier channel, for example by only ignoring or not using affected subchannel can solve the problem of bringing by the interference in one or more subchannels as the part of respective wireless link with high-throughput.
Fig. 1 is the block diagram of explanation according to the exemplary wireless device 10 of the embodiment of the invention.Wireless device 10 can be via the multicarrier communication channel support of wireless communication, and this multicarrier communication channel is made up of a plurality of frequency subchannels.For example, in a possible application, the communication in the high-throughput channel can be realized and can be supported in to wireless device 10 in wireless network, and this high-throughput channel comprises a plurality of independent IEEE 802.11a wireless channel with different center frequency.Other channel arrangement also is possible.Though technology of the present invention has application in the multicarrier system of form of ownership, the wireless device 10 of Fig. 1 will be discussed in the context environmental based on the multicarrier system of OFDM.
As shown in Figure 1, wireless device 10 can comprise: receiver circuit (chain) 12, transmitter circuitry 14, one or more in the adaptive channelization controller 16.Though both illustrate with receiver circuit 12 and transmitter circuitry 14, should be appreciated that also to provide the embodiment that only has receiver circuit 12 or transmitter circuitry 14.In order to use explicitly at particular point in time and a user, adaptive channelization controller 16 can be operated and be used for determining that the single multicarrier subchannel which is supported by wireless device 10 is formed a team.Adaptive channelization controller 16 can make a decision based on for example channel condition information 18.Receiver circuit 12 receives the multicarrier received signal 20 that comes from radio frequency (RF) receiver, and according to the control information processing signals that comes from adaptive channelization controller 16 so that generate the data 22 of decoding at its output.Transmitter circuitry 14 is in its input reception sources data 24, and generates the multicarrier that is used to be sent to the RF transmitter according to the control information that comes from adaptive channelization controller 16 and transmit 26.In at least a method, adaptive channelization controller 16 will be that equipment 10 continues to upgrade the channelizing decision based on current channel condition.
Illustrational as Fig. 1 institute; in at least one embodiment of the present invention; receiver circuit 12 comprises: frequency demodulation multiplexer 30; protection (GI) at interval removes unit 32; a plurality of fast Fourier transform (FFT)s unit 34; self adaptation parallel-to-serial converter 36, self adaptation remove mapper (demapper) 38 and decoder 40.Frequency demodulation multiplexer 30 reception multicarrier received signals 20 also are divided into this signal a plurality of parts corresponding to frequency subchannels discussed above.For example, in the embodiment in figure 1, multicarrier received signal 20 is divided into four output streams by frequency demodulation multiplexer 30.Should be appreciated that according to the present invention, can produce the output stream of any number.As discussed above, at least one embodiment, equipment 10 can be launched in the high throughput multicarrier channel of being made up of a plurality of single IEEE802.11a channels (four channels that for example have centre frequency 5180,5200,5220 and 5240MHz respectively).Frequency demodulation multiplexer 30 can be configured to separate the multi-carrier signal that is received based on these subchannels.Other arrangement also is possible.Each subchannel typically comprises a plurality of subcarriers, and each subcarrier can be modulated by enough corresponding data symbols.In at least one embodiment, the analog filtering technology is used to carry out the frequency demultiplexing, though can alternatively use other technology (for example, digital filtering technique, the combination of analog-and digital-filtering technique, or the like).Can be given HT multiple carrier channel and define any number of individual frequency subchannels.
A plurality of streams by 30 outputs of frequency demodulation multiplexer can be processed independently of each other.Like this, the potential interference in one of subchannel can be isolated with other subchannel, thereby the processing of other subchannel is had less influence or not influence.That is to say, can determine subchannel can not form the respective communication link, and therefore can be left in the basket with interference.For example, if adaptive channelization controller 16 determines that the 3rd subchannel in four subchannels is current and is just used by near another communication links in the equipment 10 that its only determines to use other 3 subchannels as the part of local user's communication link so.Then, adaptive channelization controller 16 can indication which subchannel current control information that just is being used be sent to receiver circuit 12, and after this receiver circuit 12 ignores the information among the subchannel that not have activation in reception operation subsequently.
GI removes unit 32 and can operate and be used for removing protection at interval from each independent signal of frequency demodulation multiplexer 30 output.Wherein, protection be placed at interval in the signal of emission in case enhancing signal to the insensitivity of the multi-path influence in the channel for example.Single FFT unit 34 (being 4 64 sampling FFT in illustrational embodiment) can be operated and be used for independently each independent signal (each subchannel just) being converted to frequency domain representation from time-domain representation.Though the independent FFT with each subchannel illustrates, should be appreciated that single FFT (for example, 64 sampling FFT) can with the time be tapped into and use so that handle each subchannel respectively.Each independent signal frequency-domain represents to comprise the modulating data point that is associated with each respective sub carrier in the signal.Though be illustrated as the fast Fourier transform (FFT) unit, should be appreciated that and to use any type of discrete Fourier transform (DFT).
Self adaptation parallel-to-serial converter 36 receives the data point of being exported by FFT unit 34, and this information translation is become serial flow.Self adaptation parallel-to-serial converter 36 is from adaptive channelization controller 16 receiving control informations, described control information indicating equipment 10 current channelizing situations.For example, adaptive channelization controller 16 can notify that the subchannel that self adaptation parallel-to-serial converter 36 has only some supports (for example, the first and the 3rd subchannel in four subchannels) is current forms a team for corresponding user.In a possible scheme, self adaptation parallel-to-serial converter 36 then generates serial flow by being incorporated in the information that receives in the current activation subchannel.The information of receiving from the current subchannel that is not used can be left in the basket.In another kind of scheme, self adaptation parallel-to-serial converter 36 can be added in the output stream zero (or other predetermined symbol) corresponding in the position that is not used subchannel.Self adaptation goes mapper 38 to receive the serial flow of being exported by self adaptation parallel-to-serial converter 36, and removes to shine upon corresponding data based on the prearranged signal constellation.Any different modulation system can be used, and described modulation system comprises, such as BPSK, QPSK, 8-PSK, 16QAM, 64QAM, 128QAM, 256QAM, and/or other modulation system.In at least one embodiment, modulation technique can be come adaptive based on for example current channel condition or the like.Self adaptation go mapper 38 also from adaptive channelization controller 16 receive channel information to allow mapper 38 adaptive current channel situation.Then, decoder 40 decodings are gone maps data streams so that for example detect and/or be corrected in the mistake in the corresponding data.
With reference to figure 1, at least one embodiment, transmitter circuitry 14 can comprise again: forward error correction (FEC) encoder 42, and self adaptation mapper 44, self adaptation deserializer 46, inverted-F FT (IFFT) unit 48 and protection be adding device 50 at interval.FEC encoder 42 is in its input reception sources data 24, and based on predetermined forward error correction this data of encoding.Can use any various coding.Self adaptation mapper 44 then based on prearranged signal constellation mapping coded data so that generate signaling point at its output.In order to be sent to IFFT48, the self adaptation deserializer then converts the stream of signal points of self adaptation mapper 44 outputs to parallel form.FEC encoder 42, each of self adaptation mapper 44 and self adaptation deserializer 46 can receive the control information relevant with channelizing from adaptive channelization controller 16, the current channelization scheme of described control information indication relative users.By this way, zero (perhaps other predetermined symbol) can be added in data the position of the current subchannel that is not used (technology that is called perforation such as use) in corresponding to the channel of forming a team.IFFT unit 48 (being 256-sampling IFFT in illustrational embodiment) extracts the parallel data point by 46 outputs of self adaptation deserializer, and converts them to time-domain representation from frequency domain representation.Owing to during firing operation, there is not potential interference to be processed, so single subchannel is handled by IFFT48 in receiver circuit 12 (though at least one embodiment, single subchannel is located in reason separately so that for example simplify digital processing in receiver) individually unlike aforesaid.GI adding device 50 is added to a protection in the time-domain signal of being exported by IFFT unit 48 at interval.Resulting signal then is sent to corresponding RF transmitter to be launched into wireless channel.
The channel condition information 18 that adaptive channelization controller 16 uses can comprise the information of any kind, can determine current channel operating position from these information.This can be that closed-loop process also can be that perhaps both combinations are handled in open loop.In a kind of scheme, for example adaptive channelization controller 16 can be from the far-end receiving channel state information 18 of telecommunication circuit.In another kind of scheme, channel condition information can local generate (for example, the signal to noise ratio of each subcarrier value of estimating during the former packet switching (NSR), or the like).Adaptive channelization controller 16 can use channel condition information to discern for example current subchannel that takies.In order to use in the respective wireless link, adaptive channelization controller 16 then can be selected remaining unappropriated subchannel (perhaps its subclass).When doing the channelizing judgement, also can consider other factor.
In at least one embodiment of the present invention, principle of the present invention realizes in the environment of Wireless Networking.For example, the wireless device 10 of Fig. 1 (for example for example can be positioned among the wireless user equipment, portable computer, desktop computer, palmtop PC or have the plate type computer of Wireless Networking ability, PDA(Personal Digital Assistant), cell phone or other handheld communication devices with Wireless Networking ability, or the like) and/or in WAP (wireless access point).In wireless user equipment, adaptive channelization controller 16 usually is that single relative users is determined (with adaptive) channelization scheme.On the other hand, in an access point, needing is a plurality of usertracking channelization schemes simultaneously.Many other situations also are possible.Wireless device 10 also can be the part of wireless network interface card or other radio network interface structure.In at least one embodiment, wireless device 10 is gone up in single radio frequency integrated circuit (RFIC) and is realized.Many other realizations also are possible.
Should be appreciated that in Fig. 1 illustrated single can be worked naturally and needn't be corresponding to the hardware cell that separates.For example, at least one embodiment, in single (or a plurality of) digital processing device, realize for two or more with software.Digital processing device can comprise general purpose microprocessor for example, digital signal processor (DSP), Reduced Instruction Set Computer (RISC), complex instruction set computer (CISC) (CISC), field programmable gate array (FPGA), application-specific integrated circuit (ASIC) (ASIC) and/or other, and comprises above-mentioned combination.Can make the realization of hardware, software, firmware and/or combination.
Fig. 2,3 and 4 is the channel use figure of possible operation situation that for example understand the communication equipment of the high-throughput that can operate according to the embodiment of the invention in four frequency subchannels.With reference to figure 2, its channel of supporting of high-throughput equipment monitor also notices that in current first subchannel (such as, the frequency subchannels 1 among Fig. 2) in four subchannels of IEEE 802.11a equipment be exercisable.IEEE 802.11a equipment can be exercisable in diverse basic service set (BBS) or in identical BSS as high-throughput equipment.HT equipment is then made decision so that operation in the subchannel of remaining three vicinities (such as, the frequency subchannels 2,3 and 4 in Fig. 2).Fig. 3 for example understands a kind of similar situation, be not close to except HT equipment determines three subchannels of operation therein (such as, frequency subchannels 1,3 and 4) outside.Fig. 4 understands for example that wherein HT equipment determines that a plurality of subchannels (such as, the frequency subchannels 1 and 2 in Fig. 4) are current by the situation of another HT hold facility of communicating by letter nearby.After this one HT equipment determine operation (being the frequency subchannels 3 and 4 among Fig. 4) in remaining two subchannels.As will be understood, also there are other many operational circumstances according to the present invention.In the environment of Wireless Networking, principle of the present invention can be used to, and the coexistence of legacy system (such as, IEEE 802.11a system, or the like) and more modern high throughput systems for example is provided.Principle of the present invention also can be used to organize a plurality of emission dialogues by sharing identical frequency band between several base stations.It is to allow a plurality of legacy networks that use the different frequency channel so that merge to the single BSS that uses single WAP (wireless access point) that the technology of the present invention another in wireless network may be used.
Fig. 5 is the flow chart that illustrates employed method 80 when realizing adaptive channelization in the multicarrier equipment that can operate in having the high-throughput of a plurality of subchannels (HT) channel.At first, obtain channel condition information (piece 82) for the HT multiple carrier channel.Channel condition information can be developed in this locality, and such as the measurement of doing by local receiver, and/or it also can receive from remote end entity, and remote end entity for example is the communication equipment at respective communication link opposite side.Then make the decision (piece 84) that will be used for corresponding Radio Link about the subchannel of which support based on channel condition information.In a kind of scheme, it is current occupied that channel condition information is used for discerning the subchannel of which support.Follow chooser channel from unappropriated subchannel.Replacedly, also can use other selection technology.In order to handle the corresponding multicarrier reception and/or the middle use that transmits, the subchannel Adapted information then is sent to receiver circuit and/or transmitter circuitry (piece 86).
In the detailed description in front, for the simplification that exposes, various features of the present invention are referred among one or more single embodiment together.Disclosed this method is not thought and has been reflected that such intention, promptly claimed the present invention require than the more feature of the feature that clearly exemplifies in each claim.On the contrary, reflect that creationary aspect can be all features feature still less than each disclosed embodiment as following claim.
Though disclose the present invention in conjunction with specific embodiment, should be appreciated that and can take modifications and variations, and this does not break away from the spirit and scope of invention, to understand as those of ordinary skill in the art.Such modifications and variations are considered within the authority and scope of the present invention and claims.
Claims (36)
1. wireless device comprises:
The adaptive channelization controller determines that based on channel condition information in a plurality of predetermined subchannels which is used for supporting the multi-carrier-wave wireless link; With
Receiver circuit is based on handling the multi-carrier signal that is associated with described multi-carrier-wave wireless link that receives by the control information of described adaptive channelization controller output;
Wherein, described receiver circuit comprises:
The frequency demodulation multiplexer is divided into a plurality of signal sections based on frequency with the described multi-carrier signal that receives, and described a plurality of signal sections are corresponding to described a plurality of predetermined subchannels; And
A plurality of Fourier transformation unit, be used for handling independently the described a plurality of signal sections by described frequency demodulation multiplexer output, described a plurality of Fourier transformation unit comprise second Fourier transformation unit that is used to handle first Fourier transformation unit of first signal section and is used to handle the secondary signal part at least; And
The self adaptation parallel-to-serial converter is used for receiving output stream from described a plurality of Fourier transformation unit, and based on the control information from described adaptive channelization controller described output stream is merged into serial flow.
2. the wireless device of claim 1 further comprises:
Transmitter circuitry is that described multi-carrier-wave wireless link generation multicarrier transmits based on the control information by described adaptive channelization controller output.
3. the wireless device of claim 2, wherein:
Described transmitter circuitry comprises and is used for forward error correction (FEC) encoder of coding source data, also comprises the self adaptation mapper based on predetermined modulation constellation mapping code data.
4. the wireless device of claim 3, wherein:
Described transmitter circuitry further comprises the self adaptation deserializer, and it will convert parallel form to by the serial flow of described self adaptation mapper output based on the control information from described adaptive channelization controller.
5. the wireless device of claim 4, wherein:
Described self adaptation deserializer is with the zero Data Position that adds parallel output stream to, and this position is corresponding to the current subchannel that is not used to support described multi-carrier-wave wireless link.
6. the wireless device of claim 4, wherein:
Described multicarrier transmits and is OFDM (OFDM) signal; And
Described transmitter circuitry further comprises the inverse Fourier transform unit, and described unit is used for the parallel output signal of described self adaptation deserializer is converted to time-domain representation from frequency domain representation.
7. the wireless device of claim 6, wherein:
Described transmitter circuitry further comprises protection adding device at interval, and described unit is used for protection is added in the time-domain representation of being exported by described inverse Fourier transform unit at interval.
8. the wireless device of claim 2, wherein:
Described adaptive channelization controller, described receiver circuit and described transmitter circuitry are realized on same semiconductor chip all.
9. the wireless device of claim 1, wherein:
The protection that described receiver circuit further is included between described frequency demodulation multiplexer and the described a plurality of Fourier transformation unit removes the unit at interval, is used for removing protection at interval from the described a plurality of signal sections by described frequency demodulation multiplexer output.
10. the wireless device of claim 1, wherein:
Described a plurality of Fourier transformation unit comprises at least one fast Fourier transform unit.
11. the wireless device of claim 1, wherein:
Described self adaptation parallel-to-serial converter is ignored the output stream that is associated with the current subchannel that is not used for supporting described multi-carrier-wave wireless link.
12. the wireless device of claim 1, wherein:
Described receiver circuit comprises that further self adaptation removes mapper, is used for based on the data of going from the control information of described adaptive channelization controller to shine upon by in the described serial flow of described self adaptation parallel-to-serial converter output.
13. the wireless device of claim 1, wherein:
Described channel condition information comprises the information that receives from remote location.
14. the wireless device of claim 1, wherein:
Described channel condition information is included in the information of measuring in the described wireless device.
15. a wireless device, it comprises:
The frequency demodulation multiplexer, the frequency demodulation multiplexer is divided into a plurality of parts based on frequency with the multi-carrier signal that receives, and described a plurality of parts also comprise first and second portion at least corresponding to the subchannel of a plurality of preset frequencies;
First Fourier transformation unit is transformed into frequency domain representation with the described first of described multi-carrier signal from time-domain representation;
Second Fourier transformation unit is transformed into frequency domain representation with the described second portion of described multi-carrier signal from time-domain representation mutually independently with the described first of described multi-carrier signal; And
The self adaptation parallel-to-serial converter, be used for receiving output stream from described at least first and second Fourier transformation unit, and described output stream is merged into serial flow based on the control information that receives from the adaptive channelization controller, described adaptive channelization controller determines that based on channel condition information in described a plurality of preset frequency subchannel which is used for supporting the multi-carrier-wave wireless link.
16. the wireless device of claim 15, wherein:
Described second Fourier transformation unit is and the different unit of described first Fourier transformation unit.
17. the wireless device of claim 15, wherein:
Described first and second Fourier transformation unit are identical unit, and described first and second parts of described multi-carrier signal are handled in wherein said unit in the different time.
18. the wireless device of claim 15 further comprises:
Protection removes the unit at interval, and described unit is used for removing protection at interval from described first signal section before described first signal section arrives described first Fourier transformation unit between described frequency demodulation multiplexer and described first Fourier transformation unit.
19. the wireless device of claim 15, wherein:
The described multi-carrier signal that receives is OFDM (OFDM) multi-carrier signal.
20. the wireless device of claim 15 further comprises:
At least one other Fourier transformation unit converts at least one other the part of described multi-carrier signal to frequency domain representation from time-domain representation.
21. the wireless device of claim 15, wherein:
Described frequency demodulation multiplexer comprises analog filter.
22. the wireless device of claim 15, wherein:
Described self adaptation parallel-to-serial converter is ignored the output stream that is associated with the current subchannel that is not used for supporting described multi-carrier-wave wireless link.
23. the wireless device of claim 15 also comprises:
Self adaptation is removed mapper, is used for based on the data of going from the control information of described adaptive channelization controller to shine upon by in the described serial flow of described self adaptation parallel-to-serial converter output.
24. the method for an adaptive channelization comprises:
The channel condition information that acquisition is associated with the channel with a plurality of subchannels;
Determine that based on described channel condition information which subchannel in described a plurality of subchannel is used for Radio Link, and generate the subchannel Adapted information based on described information;
The subchannel Adapted information is sent to receiver circuit so that when handling, use with multicarrier received signal that described Radio Link is associated;
Described multicarrier received signal is divided into a plurality of frequency subchannels components;
In described a plurality of frequency subchannels components each is individually transformed to frequency domain representation from time-domain representation, wherein indivedual conversion generate a plurality of output streams, and described a plurality of output streams comprise the first-class of the first frequency subchannel component that is used for described a plurality of frequency subchannels components and second stream that is used for the second frequency subchannel component of described a plurality of frequency subchannels components at least; And
Based on the described a plurality of output streams of described subchannel Adapted information self adaptation parallel serial conversion, make described output stream merge into serial flow.
25. the method for claim 24, wherein:
Described channel condition information comprises the information that receives from remote location.
26. the method for claim 24, wherein:
Described channel condition information is included in the information of measuring in the local receiver.
27. the method for claim 24, wherein:
Determine which subchannel in described a plurality of subchannel is used for described Radio Link, comprise the current subchannel that is not used of identification by other link;
28. the method for claim 24 further comprises:
Transmit the subchannel Adapted information to transmitter circuitry so that use when generating multicarrier for described Radio Link and transmit.
29. the method for claim 24, wherein:
Self adaptation and string conversion comprise ignores the output stream that is associated with the current subchannel that is not used for described Radio Link.
30. the method for claim 24 also comprises:
Go to shine upon data in the described serial flow adaptively based on described subchannel Adapted information.
31. the method for an adaptive channelization comprises:
The multi-carrier signal that receives is divided into a plurality of frequency subchannels components;
In described a plurality of frequency subchannels components each is individually transformed to frequency domain representation from time-domain representation; And
Based on the control information that receives from the adaptive channelization controller, to convert single serial flow to from the described frequency domain representation of the described a plurality of frequency subchannels component gained of conversion individually, which subchannel that described control information is discerned in a plurality of available subchannels is used to Radio Link.
32. the method for claim 31, wherein:
Individually conversion comprises in described a plurality of frequency subchannels components each is applied to independently Fourier transformation unit.
33. the system of an adaptive channelization, it comprises:
The adaptive channelization controller, it determines that based on channel condition information in a plurality of predetermined subchannels which is used for supporting the multi-carrier-wave wireless link;
At least one dipole antenna, it receives the multi-carrier signal that is associated with described Radio Link; With
Receiver circuit, it is based on handling the described multi-carrier signal that receives by the control information of described adaptive channelization controller output;
Wherein, described receiver circuit comprises:
The frequency demodulation multiplexer is divided into a plurality of signal sections based on frequency with the described multi-carrier signal that receives, and described a plurality of signal sections are corresponding to described a plurality of predetermined subchannels; And
A plurality of Fourier transformation unit, be used for handling independently the described a plurality of signal sections by described frequency demodulation multiplexer output, described a plurality of Fourier transformation unit comprise second Fourier transformation unit that is used to handle first Fourier transformation unit of first signal section and is used to handle the secondary signal part at least; And
The self adaptation parallel-to-serial converter is used for receiving output stream from described a plurality of Fourier transformation unit, and based on the control information from described adaptive channelization controller described output stream is merged into serial flow.
34. the system of claim 33, wherein:
By discerning the current subchannel that is just being used by other Radio Link, described adaptive channelization controller determines which subchannel in described a plurality of predetermined subchannel is used to support described multi-carrier-wave wireless link.
35. the system of claim 33, wherein:
Described at least one dipole antenna comprises a plurality of dipole antennas.
36. the system of claim 33, wherein:
Described receiver circuit comprises that further self adaptation removes mapper, is used for based on the data of going from the control information of described adaptive channelization controller to shine upon by in the described serial flow of described self adaptation parallel-to-serial converter output.
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| US10/812,284 US7345989B2 (en) | 2004-01-12 | 2004-03-29 | Adaptive channelization scheme for high throughput multicarrier systems |
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| EP2395722A1 (en) * | 2010-06-11 | 2011-12-14 | Intel Mobile Communications Technology Dresden GmbH | LTE baseband reveiver and method for operating same |
| CN104541551B (en) * | 2012-07-18 | 2018-04-13 | Kt株式会社 | Active scan method in wireless local area network (WLAN) system |
| US9209842B2 (en) * | 2013-09-09 | 2015-12-08 | Texas Instruments Incorporated | Method and circuitry for transmitting data |
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