CN100502289C - High data throughput wireless local area network receiver - Google Patents
High data throughput wireless local area network receiver Download PDFInfo
- Publication number
- CN100502289C CN100502289C CNB2004100977145A CN200410097714A CN100502289C CN 100502289 C CN100502289 C CN 100502289C CN B2004100977145 A CNB2004100977145 A CN B2004100977145A CN 200410097714 A CN200410097714 A CN 200410097714A CN 100502289 C CN100502289 C CN 100502289C
- Authority
- CN
- China
- Prior art keywords
- channel
- channel width
- receiver
- lead code
- high data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000012545 processing Methods 0.000 claims abstract description 83
- 238000000034 method Methods 0.000 claims abstract description 57
- 238000012549 training Methods 0.000 claims description 150
- 238000012360 testing method Methods 0.000 claims description 32
- 238000010200 validation analysis Methods 0.000 claims description 23
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000005055 memory storage Effects 0.000 claims 2
- 238000001914 filtration Methods 0.000 description 108
- 239000011159 matrix material Substances 0.000 description 46
- 238000004891 communication Methods 0.000 description 40
- 230000005540 biological transmission Effects 0.000 description 28
- 230000008569 process Effects 0.000 description 20
- 238000001228 spectrum Methods 0.000 description 18
- 230000010355 oscillation Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 8
- 230000007704 transition Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000013507 mapping Methods 0.000 description 3
- 230000001413 cellular effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011022 operating instruction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
A method for receiving a frame in a high data throughput wireless local area network begins by receiving a preamble of the frame via a channel in accordance with a default receiver filter mask. The processing continues by validating the preamble. The processing continues by, when the preamble is validated, interpreting the preamble to determine a high data throughput channel configuration. The processing continues by reconfiguring the default receiver filter mask in accordance with the high data throughput channel configuration to produce a reconfigured receiver filter mask. The processing continues by receiving a data segment of the frame in accordance with the reconfigured receiver filter mask.
Description
Technical field
The present invention relates to wireless communication system, in particular, relate to the communication of the high data throughput in this system.
Background technology
Know, communication system can be supported in wireless and/or the Wireline communication equipment between wireless and wired line traffic.The scope of this communication system relates to domestic and/or international mobile telephone system to domestic point-to-point indoor wireless net.Therefore every type communication system is according to one or more communication standard structure and operation.For example, wireless communication system can be according to following one or more standard operations, comprise: IEEE802.11, bluetooth, Advanced Mobile Phone Service (AMPS), digital AMPS, global system for mobile communications (GSM), code division multiple access (CDMA), LMDS (LMDS), Multichannel, Multipoint Distribution System (MMDS) etc., but be not limited only to this several operation standards.
Type according to wireless communication system, Wireless Telecom Equipment is such as mobile phone, two-way paging, PDA(Personal Digital Assistant), personal computer (PC), laptop computer, home entertainment device and the direct or indirect system that communicates by letter with other Wireless Telecom Equipment.For direct communication (being called point-to-point communication again), the equipment that carries out radio communication is with their reflector and (a for example radio frequency (RF) carrier wave in the wireless communication system) in receiver is transferred to identical channel or channel group, communication in this channel (group) then.For indirect radio communication, the channel that each Wireless Telecom Equipment passes through to be distributed is directly communicated by letter with association base station (for example cellular service) and/or associated access point.In order to finish communicating to connect between the Wireless Telecom Equipment, association base station and/or associated access point are by system controller, by public switch telephone network, by internet and/or other directly intercommunications mutually of wide area network by some.
For each communication equipment that adds radio communication, comprise built-in wireless transceiver (being reflector and receiver), or link to each other with related wireless transceiver (the interior wireless communication networks of for example indoor and/or building, RF modulator-demodulator etc.).As everyone knows, receiver comprises data-modulated level, one or more intermediater-frequency stage and power-amplifier stage.The data-modulated level is converted to baseband signal according to special wireless communication standard with initial data.One or more intermediater-frequency stages are mixed with baseband signal and one or more oscillation signals according, produce the RF signal.Power amplifier amplified it earlier before by antenna transmitting RF signal.
Equally as can be known, receiver links to each other with antenna, and it comprises low noise amplifier, one or more intermediater-frequency stage, filtration grade and data recovery level.Low noise amplifier receives by antenna and arrives RF signal, amplifying signal then.Mixed RF signal and the one or more local oscillator of amplifying of one or more intermediater-frequency stages is baseband signal or intermediate frequency (IF) signal with the RF conversion of signals of amplifying.Filtration grade reduces the unwanted signal that exceeds bandwidth with baseband signal or IF target signal filter, produces the signal after filtering.Data are recovered level and will be recovered the signal of initial data after filtering according to specific wireless communication standard.
By the channel of the direct or indirect distribution of communicating by letter of its generation or the channel of a plurality of distribution is to be defined by one or more standards that Wireless Telecom Equipment is supported.For example, IEEE 802.11 (a) and (g) provide the spectrum mask for the OFDM channel of 20MHz.Standard has also defined the mode that equipment is communicated by letter in channel.For example, IEEE 802.11 (a) and (g) defined in WLAN frame structure by channel communication.Frame comprises a leading and elongated degrees of data section.A leading short training sequence, a long training sequence and signal field of comprising, it provides the rate information of the data and the length of data section.
Each equipment that receives radio communication adopts frame preamble to come signal monitoring, automatic gain regulating and controlling, difference detection, frequency adjustment, time synchronized, channel and segmentation frequency departure to estimate.This frame form allows the Wireless Telecom Equipment of WLAN to communicate by letter in a kind of specific mode.But this frame form and existing WLAN device back compatible do not have higher data throughput and different wireless channel configurations.
Therefore, need a kind of method and apparatus that receives new frame form, make Wireless Telecom Equipment support different wireless channel configuration and/or high-throughput.
Summary of the invention
High data throughput wireless local area network receiver of the present invention has fully satisfied these requirements and other requirement.In one embodiment, the method that is used for received frame in high data throughput wireless local area network started from before received frame, at first, filter shielding with the receiver that produces first configuration by filtration shielding according to first channel width configuration receiver in a plurality of channel widths.Then this process is by first lead-in cable of channel received frame, and wherein first lead-in cable comprises first training sequence, second training sequence and high-throughput indication; Wherein first training sequence is in the sets of subcarriers of first channel, and second training sequence is in the sets of subcarriers of second channel; Receiver according to first configuration filters shielding, and first sets of subcarriers is the subclass of second sets of subcarriers.This process is carried out Validity Test for the first time in first training sequence then.After the Validity Test success first time, this process is then finished the validation test second time of second training sequence.After the validation test success second time, this process is explained the high-throughput indication.When high-throughput indication expression high data throughput, this process is by second lead-in cable of channel received frame.This process is filtered shielding verification second lead-in cable according to the receiver of configuration then.After second lead-in cable was by verification, this process was according to the data segment of the receiver shielding received frame of configuration.
In another embodiment, in high data throughput wireless local area network, be used for the method for received frame by beginning according to the lead code of acquiescence receiver filtration shielding via the channel received frame.Then verify lead code.When lead code was effective, this process was explained lead code, the configuration of decision high data throughput channel.Process produces the filtration shielding of the receiver that configures according to the filtration shielding that the configuration of high data throughput channel comes the allocating default receiver then.Last this process is according to the filtration shielding of the receiver that configures, the data segment of received frame.
According to an aspect of the present invention, provide the method that is used at the high data throughput wireless local area network received frame, the method comprises:
Before received frame, filter shielding with the receiver that produces first configuration according to the filtration shielding of the configuration of first channel width in a plurality of channel widths receiver;
By the first lead code section of channel received frame, wherein the first lead code section comprises first training sequence, second training sequence and high-throughput indication; First training sequence is in first sets of subcarriers of channel, and second training sequence is in second sets of subcarriers of channel; Receiver according to first configuration filters shielding, and the first training sequence collection is the subclass of the second training sequence collection;
On first training sequence, carry out validation test for the first time;
After the validation test success first time, carry out the validation test for the second time of second training sequence;
When high-throughput indication expression high data throughput, by the second lead code section of channel received frame;
Receiver according to configuration filters the shielding checking second lead code section;
After the second lead code section is verified, according to the data segment of the receiver shielding received frame that reconfigures.
Described method also comprises:
When the high-throughput indication is not represented high data throughput, according to the receiver filtration shielding of first configuration, by the data segment of channel received frame.
In the described method, explain that the second lead code section advantageously comprises:
Explain the channel format territory of second lead code, the configuration of decision high data throughput channel.
In the described method, the configuration of described high data throughput channel comprises following at least a kind of:
Have the second channel width in described a plurality of channel width, and include by 2 of single antenna reception
MIndividual subcarrier, wherein said second channel width is greater than described first channel width;
Have the 3rd channel width in described a plurality of channel width, and include by 2 of single antenna reception
KIndividual subcarrier, wherein said the 3rd channel width is less than described first channel width;
Have described first channel width, and include by 2 of many antennas receptions
NIndividual subcarrier;
Have described second channel width, and include by 2 of many antennas receptions
MIndividual subcarrier;
Have described the 3rd channel width, and include by 2 of many antennas receptions
KIndividual subcarrier.
Described method also comprises:
When the configuration of high data throughput channel is to have the second channel width and include by 2 of single-antenna transmission
MDuring the channel of individual subcarrier, verify that the second lead code section comprises:
The filtration that reconfigures receiver according to the second channel width shields, and produces the receiver that reconfigures and filters shielding;
Filter shielding according to the receiver that reconfigures, verify the second channel width single antenna training sequence of the second lead code section.
As preferably, described method also comprises:
When the configuration of described high data throughput channel is to have the 3rd channel width and include by 2 of single-antenna transmission
KDuring the channel of individual subcarrier, verify that the second lead code section comprises:
The filtration that reconfigures receiver according to the 3rd channel width shields, and produces the receiver that reconfigures and filters shielding;
Filter shielding according to the receiver that reconfigures, verify the 3rd channel width single antenna training sequence of the second lead code section.
As preferably, described method also comprises:
When the configuration of described high data throughput channel is to have first channel width and include by 2 of many antennas emissions
NDuring the channel of individual subcarrier, verify that the second lead code section comprises:
Receiver according to first configuration filters shielding, recognition training matrix from the second lead code section;
Filtration shielding and training matrix according to first receiver that disposes, verify first many antennas of channel width training sequence of the second lead code section, wherein when first many antennas of channel width training sequence is effective, the reception data segment comprises filtration shielding and the training matrix according to first receiver, by the parallel data section of channel received frame.
As preferably, described method also comprises:
When the configuration of described high data throughput channel is to have the second channel width and include by 2 of many antennas emissions
MDuring the channel of individual subcarrier, verify that the second lead code section comprises:
The filtration that reconfigures receiver according to the second channel width shields, and produces the receiver that reconfigures and filters shielding;
According to the filtration shielding of the receiver that reconfigures, recognition training matrix from the second lead code section;
Filtration shielding and training matrix according to the receiver of initial configuration, verify many antennas of second channel width training sequence of the second lead code section, wherein when many antennas of second channel width training sequence is effective, receive data segment and comprise that the filtration according to the receiver that reconfigures shields, by according to the filtration shielding of the receiver that reconfigures and the channel of training matrix, receive the frame of parallel data section.
As preferably, described method also comprises:
When the configuration of described high data throughput channel is to have the 3rd channel width and include by 2 of many antennas emissions
KDuring the channel of individual subcarrier, verify that the second lead code section comprises:
The filtration that reconfigures receiver according to the 3rd channel width shields, and produces the receiver that reconfigures and filters shielding;
According to the filtration shielding of the receiver that reconfigures, recognition training matrix from the second lead code section;
Filtration shielding and training matrix according to the receiver that reconfigures, verify the 3rd many antennas of channel width training sequence of the second lead code section, wherein when the 3rd many antennas of channel width training sequence is effective, receive filtration shielding and training matrix that data segment comprises the receiver that basis reconfigures, receive the frame of parallel data section by channel.
According to an aspect of the present invention, provide the method that is used at the high data throughput wireless local area network received frame, the method comprises:
Receive the frame of lead code by channel according to the filtration shielding of the receiver of giving tacit consent to;
The checking lead code;
When lead code is effective, explain lead code, determine the configuration of high data throughput channel;
According to the configuration of high data throughput channel, reconfigure the filtration shielding of the receiver of acquiescence, produce the receiver that reconfigures and filter shielding;
Filter shielding according to the receiver that reconfigures, receive the frame of data segment.
In the described method, the configuration of described high data throughput channel comprises following at least a kind of:
Have first channel width in a plurality of channel widths, and include 2N the subcarrier that receives by single antenna;
Have the second channel width in described a plurality of channel width, and include by 2 of single antenna reception
MIndividual subcarrier, wherein said second channel width is greater than described first channel width;
Have the 3rd channel width in described a plurality of channel width, and include by 2 of single antenna reception
KIndividual subcarrier, wherein said the 3rd channel width is less than described first channel width;
Have described first channel width, and include by 2 of many antennas receptions
NIndividual subcarrier;
Have described second channel width, and include by 2 of many antennas receptions
MIndividual subcarrier;
Have described the 3rd channel width, and include by 2 of many antennas receptions
KIndividual subcarrier.
As preferably, described method also comprises:
When the configuration of described high data throughput channel is to have the second channel width and include by 2 of single-antenna transmission
MDuring the channel of individual subcarrier, explain that the lead code section comprises:
The filtration that reconfigures receiver according to the second channel width shields, and produces the receiver that reconfigures and filters shielding;
Filter shielding according to the receiver that reconfigures, verify the second channel width single antenna training sequence of the second lead code section.
As preferably, described method also comprises:
When the configuration of described high data throughput channel is to have the 3rd channel width and include by 2 of single-antenna transmission
KDuring the channel of individual subcarrier, explain that the lead code section comprises:
The filtration that reconfigures receiver according to the 3rd channel width shields, and produces the receiver that reconfigures and filters shielding;
Filter shielding according to the receiver that reconfigures, verify the 3rd channel width single antenna training sequence of the second lead code section.
As preferably, described method also comprises:
When the configuration of described high data throughput channel is to have first channel width and include by 2 of many antennas emissions
NDuring the channel of individual subcarrier, explain that the lead code section comprises:
The filtration that reconfigures receiver according to first channel width shields, and produces the receiver that reconfigures and filters shielding;
Receiver according to first configuration filters shielding, recognition training matrix from lead code;
Filtration shielding and training matrix according to first receiver that disposes, verify first many antennas of channel width training sequence of the second lead code section, wherein when first many antennas of channel width training sequence is effective, the reception data segment comprises filtration shielding and the training matrix according to first receiver, by the parallel data section of channel received frame.
As preferably, described method also comprises:
When the configuration of described high data throughput channel is to have the second channel width and include by 2 of many antennas emissions
MDuring the channel of individual subcarrier, explain that the second lead code section comprises:
The filtration that reconfigures receiver according to the second channel width shields, and produces the receiver that reconfigures and filters shielding;
Filter shielding, recognition training matrix from the second lead code section according to the receiver that reconfigures;
Filtration shielding and training matrix according to the receiver of initial configuration, verify many antennas of second channel width training sequence of the second lead code section, wherein when many antennas of second channel width training sequence is effective, receive data segment and comprise that the filtration according to the receiver that reconfigures shields, reconfigure the filtration shielding of receiver and the channel of training matrix, the parallel data section of received frame by basis.
As preferably, described method also comprises:
When the configuration of described high data throughput channel is to have the 3rd channel width and include by 2 of many antennas emissions
KDuring the channel of individual subcarrier, explain that the second lead code section comprises:
The filtration that reconfigures receiver according to the 3rd channel width shields, and produces the receiver that reconfigures and filters shielding;
Filter shielding, recognition training matrix from the second lead code section according to the receiver that reconfigures;
Filtration shielding and training matrix according to the receiver that reconfigures, verify the 3rd many antennas of channel width training sequence of the second lead code section, wherein when the 3rd many antennas of channel width training sequence is effective, receive filtration shielding and training matrix that data segment comprises the receiver that basis reconfigures, by the parallel data section of channel received frame.
As preferably, described method also comprises:
According to the filtration shielding of the receiver of giving tacit consent to, checking training sequence.
As preferably, described method also comprises:
Second training sequence is verified in filtration shielding according to the receiver that reconfigures before receiving data segment.
According to an aspect of the present invention, the invention provides a kind of wireless receiver, comprising:
Radio frequency (RF) front end, it operationally is coupled into and immigration RF conversion of signals can be become the immigration baseband signal;
Processing module; With
Memory, itself and processing module operationally are coupled, memory stores operational order wherein, make processing module can:
Before receiving immigration baseband signal frame,, produce the filtration shielding of the receiver of first configuration according to the filtration shielding of the configuration of first channel width in a plurality of channel widths receiver;
Explain that the first lead code section frame is to discern first training sequence, second training sequence and high-throughput indication, wherein first training sequence is in first set of channel subcarrier, second training sequence is in second set of channel subcarrier, wherein according to the filtration shielding of first receiver that disposes, first set of subcarrier is the subclass of second set of subcarrier;
In first training sequence, carry out first validation test;
After first validation test success, carry out second validation test of second training sequence;
After second validation test success, explain the high-throughput indication;
When high-throughput indication expression high data throughput, filter the shielding checking second lead code section according to the receiver that reconfigures;
When the second lead code section is effective, filter the frame that shielding receives data segment according to the receiver that reconfigures.
As preferably, the also storage operation instruction of described memory makes processing module:
When the high-throughput indication is not the expression high data throughput, according to the receiver filtration shielding of first configuration, by the frame of Channel Processing data segment.
As preferably, the also storage operation instruction of described memory makes processing module explain the second lead code section in the following manner:
Explain the channel format territory of the second lead code section, determine the configuration of high data throughput channel.
The configuration of described high data throughput channel comprises following at least a kind of:
Have the second channel width in a plurality of channel widths, and include by 2 of single antenna reception
MIndividual subcarrier, wherein said second channel width is greater than described first channel width;
Have the 3rd channel width in described a plurality of channel width, and include by 2 of individual antenna reception
KIndividual subcarrier, wherein said the 3rd channel width is less than described first channel width;
Have described first channel width, and include 2N the subcarrier that receives by many antennas;
Have described second channel width, and include by 2 of many antennas receptions
MIndividual subcarrier;
Have described the 3rd channel width, and include by 2 of many antennas receptions
KIndividual subcarrier.
As preferably, the also storage operation instruction of described memory, make processing module can:
When the configuration of described high data throughput channel is to have the second channel width and include by 2 of single-antenna transmission
MDuring the channel of individual subcarrier, verify the second lead code section in the following manner:
The filtration that reconfigures receiver according to the second channel width shields, and produces the filtration shielding of the receiver that reconfigures;
According to the filtration shielding of the receiver that reconfigures, verify the second channel width single antenna training sequence of the second lead code section.
As preferably, the also storage operation instruction of described memory makes processing module:
When the configuration of described high data throughput channel is to have the 3rd channel width and include by 2 of single-antenna transmission
KDuring the channel of individual subcarrier, verify the second lead code section in the following manner:
The filtration that reconfigures receiver according to the 3rd channel width shields, and produces the filtration shielding of the receiver that reconfigures;
According to the filtration shielding of the receiver that reconfigures, verify the 3rd channel width single antenna training sequence of the second lead code section.
As preferably, the also storage operation instruction of described memory makes processing module:
When the configuration of described high data throughput channel is to have first channel width and include by 2 of many antennas emissions
NDuring the channel of individual subcarrier, verify the second lead code section in the following manner:
According to the filtration shielding of first receiver that disposes, recognition training matrix from the second lead code section;
Filtration shielding and training matrix according to first receiver that disposes, verify first many antennas of channel width training sequence of the second lead code section, wherein when first many antennas of channel width training sequence is effective, the reception data segment comprises filtration shielding and the training matrix according to first receiver, by the parallel data section of channel received frame.
As preferably, the also storage operation instruction of described memory makes processing module:
When the configuration of described high data throughput channel is to have the second channel width and include by 2 of many antennas emissions
MDuring the channel of individual subcarrier, verify the second lead code section in the following manner:
The filtration that reconfigures receiver according to the second channel width shields, and produces the filtration shielding of the receiver that reconfigures;
According to the filtration shielding of the receiver that reconfigures, recognition training matrix from the second lead code section;
Filtration shielding and training matrix according to the receiver of initial configuration, verify many antennas of second channel width training sequence of the second lead code section, wherein when many antennas of second channel width training sequence is effective, receive data segment and comprise that the filtration according to the receiver that disposes shields, by according to the filtration shielding of receiver of configuration and the channel of training matrix, the parallel data section of received frame.
As preferably, the also storage operation instruction of described memory makes processing module:
When the configuration of described high data throughput channel is to have the 3rd channel width and include by 2 of many antennas emissions
KDuring the channel of individual subcarrier, verify the second lead code section in the following manner:
The filtration that reconfigures receiver according to the 3rd channel width shields, and produces the filtration shielding of the receiver that reconfigures;
According to the filtration shielding of the receiver that reconfigures, recognition training matrix from the second lead code section;
Filtration shielding and training matrix according to the receiver of initial configuration, verify the 3rd many antennas of channel width training sequence of the second lead code section, wherein when the 3rd many antennas of channel width training sequence is effective, receive filtration shielding and training matrix that data segment comprises the receiver that basis reconfigures, by the parallel data section of channel received frame.
According to an aspect of the present invention, the invention provides a kind of wireless receiver, comprising:
Radio frequency (RF) front end, it operationally is coupled into and immigration RF conversion of signals can be become the immigration baseband signal;
Processing module;
Memory, it is operably connected with processing module, memory stores operational order wherein, make processing module can:
According to the filtration shielding of the receiver of giving tacit consent to, by the frame of channel identification lead code;
The checking lead code;
When lead code is effective, explain that lead code is to determine the configuration of high data throughput channel;
According to the configuration of high data throughput channel, the filtration that reconfigures the receiver of acquiescence shields the filtration shielding of the receiver that reconfigures with generation;
According to the filtration shielding of the receiver that reconfigures, the frame of process segments of data.
As preferably, the configuration of described high data throughput channel comprises following at least a kind of:
Have first channel width in a plurality of channel widths, and include by 2 of single antenna reception
NIndividual subcarrier;
Have the second channel width in described a plurality of channel width, and include by 2 of single antenna reception
MIndividual subcarrier, wherein said second channel width is greater than described first channel width;
Have the 3rd channel width in described a plurality of channel width, and include by 2 of single antenna reception
KIndividual subcarrier, wherein said the 3rd channel width is less than described first channel width;
Have described first channel width, and include by 2 of many antennas receptions
NIndividual subcarrier;
Have described second channel width, and include by 2 of many antennas receptions
MIndividual subcarrier;
Have described the 3rd channel width, and include by 2 of many antennas receptions
KIndividual subcarrier.
As preferably, the also storage operation instruction of described memory, make processing module can:
When the configuration of described high data throughput channel is to have the second channel width and include by 2 of single-antenna transmission
MDuring the channel of subcarrier, explain lead code in the following manner:
The filtration that reconfigures receiver according to the second channel width shields, and produces the filtration shielding of the receiver that reconfigures;
According to the filtration shielding of the receiver that reconfigures, verify the second channel width single antenna training sequence of the second lead code section.
As preferably, the also storage operation instruction of described memory makes processing module:
When the configuration of described high data throughput channel is to have the 3rd channel width and include by 2 of single-antenna transmission
KDuring the channel of subcarrier, explain lead code in the following manner:
The filtration that reconfigures receiver according to the 3rd channel width shields, and produces the filtration shielding of the receiver that reconfigures;
According to the filtration shielding of the receiver that reconfigures, verify the 3rd channel width single antenna training sequence of the second lead code section.
As preferably, the also storage operation instruction of described memory, make processing module can:
When the configuration of described high data throughput channel is to have first channel width and include by 2 of many antennas emissions
NDuring the channel of subcarrier, explain lead code in the following manner:
The filtration that reconfigures receiver according to first channel width shields, and produces the filtration shielding of the receiver that reconfigures;
According to the filtration shielding of first receiver that disposes, recognition training matrix from lead code;
Filtration shielding and training matrix according to first receiver that disposes, verify first many antennas of channel width training sequence of the second lead code section, wherein when first many antennas of channel width training sequence is effective, the reception data segment comprises filtration shielding and the training matrix according to first receiver, by the parallel data section of channel received frame.
As preferably, the also storage operation instruction of described memory makes processing module:
When the configuration of described high data throughput channel is to have the second channel width and include by 2 of many antennas emissions
MDuring the channel of individual subcarrier, explain the second lead code section in the following manner:
The filtration that reconfigures receiver according to the second channel width shields, and produces the filtration shielding of the receiver that reconfigures;
According to the filtration shielding of the receiver that reconfigures, recognition training matrix from the second lead code section;
Filtration shielding and training matrix according to the receiver of initial configuration, verify many antennas of second channel width training sequence of the second lead code section, wherein when many antennas of second channel width training sequence is effective, receive data segment and comprise that the filtration according to the receiver that reconfigures shields, by according to the filtration shielding of the receiver that reconfigures and the channel of training matrix, the parallel data section of received frame.
As preferably, the also storage operation instruction of described memory makes processing module:
When the configuration of described high data throughput channel is to have the 3rd channel width and include by 2 of many antennas emissions
KDuring the channel of individual subcarrier, explain the second lead code section in the following manner:
The filtration that reconfigures receiver according to the 3rd channel width shields, and produces the filtration shielding of the receiver that reconfigures;
According to the filtration shielding of the receiver that reconfigures, recognition training matrix from the second lead code section;
Filtration shielding and training matrix according to the receiver that reconfigures, verify the 3rd many antennas of channel width training sequence of the second lead code section, wherein when the 3rd many antennas of channel width training sequence is effective, receive filtration shielding and training matrix that data segment comprises the receiver that basis reconfigures, by the parallel data section of channel received frame.
As preferably, the also storage operation instruction of described memory makes processing module verify lead code in the following manner:
Filtration shielding checking training sequence according to the receiver of giving tacit consent to.
As preferably, the also storage operation instruction of described memory, make processing module can:
Filtration shielding checking second training sequence before receiving data segment according to the receiver that reconfigures.
Description of drawings
Fig. 1 is the schematic block diagram according to wireless communication system of the present invention;
Fig. 2 is the schematic block diagram according to Wireless Telecom Equipment of the present invention;
Fig. 3 is the figure that shows the frequency band that adopts according to the present invention;
Fig. 4 is the figure that shows according to the channel distribution of frequency band of the present invention;
Fig. 5 is the figure of configurable according to an embodiment of the invention spectrum shielding;
Fig. 6 has provided the table of the example of parameters of configurable spectrum shielding among Fig. 5;
Fig. 7 is according to the figure of one embodiment of the invention by RF channels transmit frame;
Fig. 8 is the figure of frame format according to an embodiment of the invention;
Fig. 9 is the figure of channel configuration according to an embodiment of the invention;
Figure 10 is the logic diagram that is used for according to the present invention in the method for high data throughput wireless local area network received frame; And
Figure 11 is the logic diagram that is used for according to the present invention in the alternative approach of high data throughput wireless local area network received frame.
Embodiment
Fig. 1 is the schematic block diagram that has shown wireless communication system 10, and wireless communication system 10 comprises a plurality of base stations and/or access point 12-16, a plurality of Wireless Telecom Equipment 18-32 and network hardware component 34.Wireless Telecom Equipment 18-32 can be master computer 18 on knee and 26, personal digital assistant 20 and 30, personal computer main frame 24 and 32, and/or portable phone 22 and 28.Introduce the details of Wireless Telecom Equipment in more detail below with reference to Fig. 2.
Base station or access point 12-16 connect 36,38 and 40 by local area network (LAN) and operationally are coupling on the network hardware 34.The network hardware 34 can be router, transducer, bridge, modulator-demodulator, system controller or the like, and provides the wide area network that is used for communication system 10 to connect 42.Each base station or access point 12-16 have relevant antenna or aerial array, so that communicate with Wireless Telecom Equipment in its district by one or more configurable channels in one or more frequency bands.Generally speaking, Wireless Telecom Equipment registration has specific base stations or access point 12-14 so that receive business from communication system 10.For direct connection (being point-to-point communication), Wireless Telecom Equipment comes direct communication by institute's allocated channel of configurable channel.
Generally speaking, the base station is used for the system of portable telephone system and similar type, and access point is used for the wireless network in indoor or the mansion.Irrelevant with the communication system of particular type, each Wireless Telecom Equipment comprises built in radio equipment and/or is coupling on the wireless device.Wireless device comprises the amplifier and/or the programmable multistage amplifier of highly linear disclosed herein, so that performance to be provided, reduces cost, and reduces size, and/or improves broadband application.
Fig. 2 is the schematic block diagram that has shown Wireless Telecom Equipment, and this Wireless Telecom Equipment comprises main process equipment 18-32 and relevant wireless device 60.For the portable phone main frame, wireless device 60 is build-in components.For personal digital assistant main frame, laptop computer main frame and/or personal computer main frame, wireless device 60 can be the parts of built-in or coupled outside.
As shown in the figure, main process equipment 18-32 comprises processing module 50, memory 52, radio interface 54, input interface 58 and output interface 56.Processing module 50 and memory 52 are carried out the command adapted thereto that is sent by main process equipment usually.For example, for the portable phone main process equipment, processing module 50 is carried out the corresponding communication function according to the specific cellular phones standard.
Radio interface 54 allows to receive data and send data to wireless device 60 from wireless device 60.For receive data (data of for example entering a country) from wireless device 60 for, radio interface 54 offers processing module 50 with data so that further handle and/or be routed to output interface 56.Output interface 56 can be connected to output display unit such as display, monitor, loud speaker etc. and go up so that show the data that receive.Radio interface 54 also can provide data to wireless device 60 from processing module 50.Processing module 50 can receive the departure data by input interface 58 from input equipment such as keyboard, keypad, microphone etc., perhaps the automatically generating certificate.For the data that received by input interface 58, processing module 50 can be carried out corresponding host function and/or data are routed to wireless device 60 by radio interface 54 on data.
Wireless device 60 comprises host interface 62, digit receiver processing module 64, analog-digital converter 66, filtering/gain module 68, IF frequency-reducing type mixed frequency signal switching stage 70, receiver filter 71, low noise amplifier 72, Tx/Rx transducer 73, local oscillation module 74, memory 75, digit emitter processing module 76, D-A converter 78, filtering/gain module 80, IF raising frequency formula mixed frequency signal switching stage 82, power amplifier 84, reflector filtration module 85 and antenna 86.Antenna 86 can be the single antenna of being shared by transmission channel and receive path by Tx/Rx transducer 73 control, perhaps can comprise the antenna separately that is used for transmission channel and receive path.The specific criteria that Wireless Telecom Equipment adapts to is depended in the practical application of antenna.
Stored operational order comes combine digital receiver baseband functions and digit emitter baseband functions respectively in digit receiver processing module 64 and digit emitter processing module 76 and the memory 75.The digit receiver baseband functions comprises but is not limited to digital intermediate frequency removes mapping, decoding and/or descrambling to baseband-converted, demodulation, group.The digit emitter function includes but not limited to that scrambler, coding, group's mapping, modulation and/or digital baseband change to intermediate frequency.Digit receiver processing module 64 and digit emitter processing module 76 can adopt shared processing apparatus, single processing apparatus or a plurality of processing apparatus to realize.Sort processor spare can be microprocessor, microcontroller, digital signal processor, microcomputer, CPU, field programmable gate array, programmable logic device, state machine, logical circuit, analog circuit, digital circuit, and/or anyly can come the device of control signal (simulation and/or numeral) based on operational order.Memory 75 can be single memory or a plurality of memory.The sort memory device can be read-only memory, random access memory, volatile memory, nonvolatile memory, static memory, dynamic memory, flash memory, but and/or the device of any storage of digital information.Should note, when digit receiver processing module 64 and digit emitter processing module 76 realize one or more its function by state machine, analog circuit, digital circuit and/or logical circuit, the memory that has stored the corresponding operating instruction embedded include in the circuit of state machine, analog circuit, digital circuit and/or logical circuit.
In operation, wireless device 60 receives departure data 94 by host interface 62 from main process equipment.Host interface 62 data 94 of will leaving the country are routed to digit emitter processing module 76, and it handles departure data 94 according to specific wireless communication standard (as IEEE802.11, bluetooth etc.), to produce digital transmission form data 96.Digital transmission form data 96 will be digital baseband signal or digital Low Medium Frequency signal, and wherein Low Medium Frequency normally is in 100 kilo hertzs to the interior frequency of the frequency range of several megahertzes.In addition, digital transmission form data 96 are based on the channel width of radio-frequency channel, and data 96 will finally be launched according to this channel width.For example, channel width can be 10 megahertzes, 20 megahertzes or 40 megahertzes.Continue this example, if channel is OFDM (Orthodoxy Frequency Division Multiplex) channel, the wide channel of 10 megahertzes can comprise 32 subcarrier frequencies so, the wide channel of 20 megahertzes can comprise 64 subcarrier frequencies, the wide channel of 40 megahertzes can comprise 128 subcarrier frequencies, and wherein the used number of subcarriers of each channel is based upon the frequency spectrum of the shielding of channel configuration at least in part.At length introduce the configuration of spectrum mask below with reference to Fig. 3-6.
Wireless device 60 also receives immigration RF signal 88 by antenna 86, and it is launched by base station, access point or another Wireless Telecom Equipment.Antenna 86 offers receiver filter 71 by the Tx/Rx transducer 73 RF signal 88 of will entering a country, and the RF of 71 pairs of immigrations of receiver filter here signal 88 carries out bandpass filtering.Receiver filter 71 offers low noise amplifier 72 with filtered RF signal, and it amplifies the immigration RF signal that amplifies to produce with signal 88.The immigration RF signal that low noise amplifier 72 will amplify offers IF frequency-reducing type frequency mixing module 70, and its immigration RF signal that will amplify according to the receiver local oscillation 81 that local oscillation module 74 is provided is directly changed into immigration Low Medium Frequency signal or baseband signal.Frequency-reducing type mixing modular converter 70 offers filtering/gain module 68 with Low Medium Frequency signal or baseband signal.Filtering/gain module 68 pairs of immigrations Low Medium Frequency signal or immigration baseband signal are carried out filtering and/or gain, to produce the immigration signal of filtering.The spectrum mask that is disposed that is used for the RF transmission is depended in the logical district of band that it should be noted that filter 71 and 68, and it can be determined by receiver processing module 64.
The analog-digital converter 66 immigration signal from analog territory of filtering is transformed into numeric field, to produce digital received formatted data 90.The particular wireless communication standards that is adopted according to wireless device 60 and the specific passageways width of path, 64 pairs of digital received formatted datas 90 of digit receiver processing module are decoded, descrambling, group go mapping and/or demodulation and recapture immigration data 92.The immigration data 92 that host interface 62 will be recaptured by radio interface 54 offer main process equipment 18-32.
The Wireless Telecom Equipment that persons of ordinary skill in the art may appreciate that Fig. 2 can be realized by one or more integrated circuits.For example, main process equipment can be achieved on an integrated circuit, digit receiver processing module 64, digit emitter processing module 76 and memory 75 can be achieved on second integrated circuit, and the remaining part except antenna 86 of wireless device 60 can be implemented on the 3rd integrated circuit.As another example, wireless device 60 can be achieved on single integrated circuit.As another example, the processing module 50 of main process equipment and digit receiver processing module 64 and digit emitter processing module 76 can be the common process devices that is achieved on single integrated circuit.In addition, memory 52 and memory 75 can be implemented on the single integrated circuit and/or the integrated circuit identical with processing module 50 and digit receiver processing module 64 and digit emitter processing module 76 on.
Fig. 3 has described a plurality of frequency bands (for example from frequency band 1 to frequency band N), and it can be stipulated to be used for specific wireless application by government organs.For example, Federal Communications Commission (FCC) has stipulated the used frequency band that is used for special-purpose of the U.S. and has required to have the frequency band (for example wireless radio transmission, television transmission etc.) of FCC permission, and the frequency band that regulation is not permitted can be used in the various application scenarios equally.For example, FCC the some frequency bands in the regulation radio spectrum do not permit.This not frequency band of permission comprises 902-928 megahertz, 2.4-2.483 gigahertz and 5.75-5.85 gigahertz, and it is referred to as ISM (industry, science and medicine) frequency band.Now, the ISM frequency band has been used in the mansion and system applies (for example bar code reader), industrial microwave oven, wireless patient patient monitor and wireless lan (wlan)).Generally speaking, the frequency band of Fig. 3 includes but not limited to the 2.400-2.4835 gigahertz, the 2.471-2.497 gigahertz, 5.15-5.25 gigahertz, 5.25-5.35 gigahertz, 5.47-5.725 gigahertz, 5.725-5.825 gigahertz, 4.9-5.3 gigahertz and 5.85-5.925 gigahertz.
Fig. 4 is the figure that has described the special frequency band that is divided into a plurality of channels.According to the present invention, the channel width of each channel is selectable.Equally, for allocated frequency band, channel quantity can change according to selected channel width.For example, in one embodiment of the invention, can be according to IEEE 802.11 (a) or (g) come the selective channel width, IEEE 802.11 (a) provides the rules of the wireless local area network operation in the 5.15-5.35 gigahertz frequency band here.Usually, the modulation scheme of defined is based on Orthodoxy Frequency Division Multiplex (OFDM), for 802.11 (a), it is divided into the 5.15-5.35 gigahertz frequency band 8 the 20 wide channels of megahertz that are centered close to 5.18,5.20,5.22,5.24,5.26,5.28,5.30 and 5.32 gigahertzs.In another embodiment of the present invention, the 5.15-5.35 gigahertz frequency band can be divided into 18 the 10 wide channels of megahertz, its first channel be centered close to 5.165 gigahertzs, all the other 17 are centered close on the frequency that therefrom increases progressively 10 megahertzes successively.In another embodiment of the present invention, the 5.15-5.35 gigahertz frequency band can be divided into 4 the 40 wide channels of megahertz, and wherein channel is centered close to 5.21,5.25,5.29 and 5.33 gigahertzs.Same frequency bandwidth alternative is applicable to the 2.4-2.4835 gigahertz frequency band that IEEE 802.11 (g) is covered, other frequency band that IEEE 802.11 standards are covered, and/or any other wireless communication standard.The alternative of frequency bandwidth provides the bigger data throughout that is used for multiple application (for example being the twice at least of the message transmission rate of IEEE 802.11 (g)), and/or makes single wireless communication equipment can support various standards bodies to comprise the multiple wireless standard that government organs issue.
Fig. 5 is the figure of configurable spectrum mask 100, configurable spectrum mask 100 comprise channel by distinguish 102, transition region 104 and bottom region 106.Transition region 104 comprises first decay area 108, second decay area 110 and the 3rd decay area 112.This spectrum mask 100 has improved interoperability, compossibility and power system capacity by restriction to the interference of adjacent channel and other channel in many application and/or standard.Frequency band shielding outside (for example transition region 104 and bottom region 106) is provided with the interference level of lower restriction, and this interference level can be expected and is used for receiver and irrelevant with its specific implementation.In order to reduce the interfering energy that appears on the desired signal, that the outer setting one-tenth in frequency band district is as much as possible little.
To achieve these goals, the channel that comprises desired signal by distinguish 102 numerical value as far as possible can realize near channel width.The restriction adjacent-channel interference also is subjected to digit receiver processing module 64 and the transition region 104 of the IF mixer stage of digit emitter processing module 76 and up-conversion module 82 restriction is chosen to reduce this interference (i.e. IF intermodulation distortion (IMD) afterwards) as far as possible.Limit other channel disturbance and be in filter and the scope of IMD limit value beyond and also selected according to attainable phase noise level by the bottom region that phase noise limited 106 of local oscillation 74.
For example, transition region 104 should have based on the rolling of IMD shoulder height decay, and it can be supposed by three compressive non-linearity and produces.According to this supposition, can be expressed as the distortion transmission signals y (t) of the function of desirable transmission signals x (t): y (t)=x (t)-f (Ax
3(t)), wherein f () can remove the non-linear any direct current that produces or the band pass filter of harmonic signal, A=4/3 (1/OIP
3)
2, wherein OIP represents " exporting three times capture point ", Y in frequency domain (f)=X (f)-AX (F) * X (f) * X (f).Equally, the distorted signal bandwidth is no more than three times of ideal signal bandwidth.
Be subjected to the bottom region 106 that the local oscillation phase noise limited can be based on L (f) with the power spectrum density convolution of desirable transmission signals, wherein L (f) is defined as standardization phase noise spectrum density in ieee standard 1139-1999, y (t)=x (t) 1 (t) wherein, Y (f)=X (f) * L (f), here the desirable RF signal of x (t) expression, 1 (t) is the phase noise model that results from the local oscillation, and y (t) represents composite signal, and Y (f) is the composite signal in the frequency domain.It should be noted that from carrier wave 10 megahertzes or many places more, phase noise spectrum is more flat relatively.Therefore, for the channel of 20 megahertzes, can realize-123 decibels/hertz noise bottom limit, for the channel of 40 megahertzes, can realize-126 decibels/hertz noise bottom limit.
Fig. 6 is the table that has shown the several parameters example of configurable spectrum mask 100.Although this table comprises the channel width of 10,20 hertz of 40 megahertz, yet persons of ordinary skill in the art may appreciate that the channel width that can adopt other.In addition, transition region can comprise than more or less decay area shown in Figure 5.
Fig. 7 has shown that radio transmitter part 120 is transferred to frame 126A, 126B by radio frequency (RF) channel 124 figure of radio receiver part 122.Radio transmitter part 120 is located in the Wireless Telecom Equipment and corresponding to digit emitter processing module 76, D-A converter 78, filtering/gain module 80, IF raising frequency formula mixed frequency signal switching stage 82, power amplifier 84, the reflector filtration module 85 of Wireless Telecom Equipment shown in Figure 2.Radio receiver part 122 in another Wireless Telecom Equipment is corresponding to digit receiver processing module 64, analog-digital converter 66, filtering/gain module 68, IF frequency-reducing type mixed frequency signal switching stage 70, low noise amplifier 72 and the receiver filter 71 of Wireless Telecom Equipment shown in Figure 2.Channel 124 can be any channel shown in Figure 3, and can have that to submit to day be that November 24, lawyer's file number in 2003 are that BP3400, sequence number are 60/524528, any spectrum mask configuration of autograph for being introduced in the common pending application application of " the configurable spectrum mask that is used for high data throughput radio communication ".
The form of frame 126A, 126B comprises the first lead code section 128, the second lead code section 130, variable length data section 132.The first lead code section 128 comprises first training sequence 134, second training sequence 136 and high-throughput channel indication 138.The second lead code section 130 comprises the 3rd training sequence 140.In one embodiment, first training sequence 134 and second training sequence 136 can be corresponding to short training sequence and the long training sequences according to the lead code among IEEE 802.11a or the g.When transmitting radio equipment wishes to use the high data throughput channel configuration, high data throughput channel indication 138 is set.If the indication of high data throughput channel is not set, then ignore the second lead code section 130, and frame is formatted to similarly according to IEEE802.11a, b, g wait the conventional WLAN of operating.
When being provided with the high data throughput channel and indicating 138, the 3rd training sequence 140 of carrying out the second lead code section is to finely tune radio receiver according to specific channel configuration.Variable length data section 132 comprises protection interval and relevant data fields.Introduce the format of frame 126 in more detail with reference to figure 6.
Fig. 8 shows frame 126 in greater detail.As shown in the figure, the first lead code section 128 comprises first training sequence 134, second training sequence 136 and the signal field.First training sequence 134 comprises 10 short training sequences, and it has only used the part of the subcarrier of particular channel.For example, channel configuration can be the 20 megahertz channel widths that have 64 subcarriers.First training sequence 134 can only use 12 in 52 data subcarriers to transmit corresponding short training sequence.Second training sequence 136 comprises 2 long training sequences, and it can utilize in 52 data subcarriers of 20 megahertzes, 64 channel subcarriers 52.
Signal field comprises protection interval (GI) and comprises 24 information.The one 4 next bit is represented high data throughput channel indication 138 corresponding to message transmission rate, ensuing 12 length corresponding to variable length data section 132, and position 17 parities corresponding to data, remaining 6 corresponding to wave tail.
If high data throughput channel indication 138 is not set, then receive wireless device will based on the acquiescence or first channel configuration come self is configured, this channel configuration can be the channel of 20 megahertz bandwidth of present defined employing 64 subcarriers among IEEE 802.11a and/or the g.Yet if be provided with high data throughput channel indication 138, and receiver can change channel configuration, and it will begin decipher second lead code.
The second lead code section 130 comprises channel format identification field and the 3rd training sequence 140.The channel logo field can comprise other 4 that are used for rate information, 5 channel configuration information, and 12 indication training matrix, and can keep remaining 3.Those having ordinary skill in the art will appreciate that, 24 channel format identification field can be configured in many ways, information is sent to the reception wireless device, these information are the bit rate about high-throughput data, the channel configuration that will transmit high-throughput data, diversity antenna arrangement, and the training sequence that can produce dual RF transmission on individual channel.
In case treated channel format identification field, then receiving wireless device will come self is reconfigured based on channel configuration and message transmission rate.After self being reconfigured, wireless device receives the 3rd training sequence 140, and it has utilized the most of subcarrier according to new channel configuration.Introduce channel configuration in more detail below with reference to Fig. 7.
The first and second lead code sections can combine and use so that 8 bit rate informations to be provided, and/or can use separately, with in the speed of carrying out each communication of indication under the diplex situation on the single path.
Variable length data section 132 comprises a plurality of data segments and relevant protection interval (GI).
Fig. 9 has shown the various tables that can be used for transmitting the channel configuration of high data throughput communication.This channel configuration table comprises the row of the position that is used for index specific channel configuration and configuration information, it comprises channel width, and the number of subcarriers of each channel, speed are explained (being combination or independent speed position of using in each lead code section) and space-time code (being the channel paths quantity that specific RF channel is supported).In this example, there are 3 channel widths to select 10 megahertzes, 20 megahertzes and 40 megahertzes.According to the default action of wireless communication system of the present invention, will be according to defined operation the among IEEE 802.11a or the g.Know that the channel configuration that is used for IEEE 802.11a and/or g comprises the 20 megahertz channel widths that adopted 64 subcarriers, wherein having only a path is that the RF channel is supported.Therefore, the channel configuration of acquiescence is not among the channel configuration information in the second lead code section.
Yet, have the 20 megahertz bandwidth channels of support if adopt via the space-time code of 2 paths of single RF channel, can realize higher data throughout.In an example, explain that corresponding to speed the speed on 0, two channel is identical, it allows 8 binary digits (from 4 of the first lead code section with from synthetic 8 codings of 4 hytes of the second lead code section).If the speed of 2 paths is different in the space-time code, then speed explains it is 1.In this example, 4 bit rate informations in the first lead code section are used to indicate the speed of one of them channel paths, and 4 bit rate informations in the second lead code section are used to indicate the speed of one other channel path.
Also demonstrate from table, the channel of 40 megahertz bandwidth can comprise 128 subcarriers and the support of each channel 1 or 2 paths.Equally, the channel of 10 megahertz bandwidth can have 64 subcarriers and can support 1 or 2 channel paths.
Figure 10 is the logic diagram that is used in the method for high data throughput wireless local area network received frame.Processing starts from step 150, and wherein before received frame, radio receiver disposes the shielding of receiver filter according to first channel width in a plurality of channel widths, to produce the receiver filter shielding of first configuration.For example, first channel width can be corresponding to IEEE802.11 (a) and/or defined 20 megahertz channel widths (g).In other words, but receiver will dispose the shielding of its receiver filter according to the spectrum mask of transmission frame.
Processing proceeds to step 152, and wherein radio receiver comes the first lead code section of received frame by means of channel.The first lead code section comprises first training sequence, second training sequence and high data throughput indication.It should be noted that first training sequence is in first group of subcarrier of channel, second training sequence is in second group of subcarrier of channel, and wherein first group of subcarrier is the child group according to second group of subcarrier of the receiver filter shielding of first configuration.Data processing proceeds to step 154 then, and wherein radio receiver carries out first validation test on first training sequence.Data processing proceeds to step 156 then, and wherein radio receiver judges whether first validation test is successful.If unsuccessful, then data processing proceeds to step 158, and wherein radio receiver thinks that frame is invalid, and waits for another frame of reception.When receiving new frame, continue to handle at step 152 place.
Yet if first validation test success is handled and proceeded to step 160, wherein radio receiver carries out second validation test of second training sequence.Handle then and proceed to step 162, wherein radio receiver judges whether second validation test is successful.If unsuccessful, then handle and proceed to step 158,, wherein radio receiver thinks that frame is invalid, and waits for another frame of reception.When receiving new frame, continue to handle at step 152 place.
Yet if second validation test success, data processing proceeds to step 164, and wherein indication makes an explanation radio receiver to high data throughput.In one embodiment, this can make an explanation by the channel format territory to the second lead code section and carry out with the channel configuration of determining high data throughput.The channel configuration that it should be noted that high data throughput can be indicated the second channel width in a plurality of channel widths, wherein the second channel width have by single antenna receive 2
MIndividual subcarrier, and width is greater than first channel width; The 3rd channel width in a plurality of channel widths, wherein the 3rd channel width has by 2 of single antenna reception
KIndividual subcarrier, and width is less than first channel width; First channel width, it has by 2 of many antennas receptions
NIndividual subcarrier; The second channel width, it has by 2 of many antennas receptions
MIndividual subcarrier; With the 3rd channel width, it has by 2 of many antennas receptions
KIndividual subcarrier.
Processing proceeds to step 166, and wherein radio receiver judges that high data throughput indicates whether to indicate high data throughput.If it's not true, then handle and proceed to step 168, wherein radio receiver comes the data segment of received frame by channel according to the receiver filter shielding of first configuration.After the remainder that has received frame, handle and get back to the frame of step 150 with processing subsequent.
Yet when if high data throughput indicates high data throughput, data processing proceeds to step 170, and wherein radio receiver is by the second lead code section of channel received frame.Data processing proceeds to step 172 then, and wherein radio receiver is explained the second lead code section with definite new shield configuration, and correspondingly reconfigures the shielding of receiver filter.
Processing proceeds to step 174, and wherein radio receiver shields the 3rd channel width single antenna training sequence of verifying the second lead code section according to the receiver filter that reconfigures.This can carry out in several ways.In one embodiment, verify the second lead code section by this way: reconfigure the shielding of receiver filter according to the second channel width, with the receiver filter shielding that generation reconfigures, wherein channel has the second channel width and comprises by 2 of single antenna transmissions
MIndividual subcarrier; Shield the second channel width single antenna training sequence of verifying the second lead code section according to the receiver filter that reconfigures.
In another embodiment, verify the second lead code section by this way: reconfigure the shielding of receiver filter according to the 3rd channel width, with the receiver filter shielding that generation reconfigures, wherein channel has the 3rd channel width and comprises by 2 of single antenna transmissions
KIndividual subcarrier; Shield the 3rd channel width single antenna training sequence of verifying the second lead code section according to the receiver filter that reconfigures.
In another embodiment, verify the second lead code section by this way: the receiver filter according to first configuration shields recognition training matrix from the second lead code section, wherein channel have first channel width and comprise by multi-antenna transmitting defeated 2
NIndividual subcarrier; First many antennas of channel width training sequence of verifying the second lead code section according to the receiver filter shielding and the training matrix of first configuration, wherein when first many antennas of channel width training sequence checking by the time, receive data segment and comprise according to the receiver filter shielding of first configuration and training matrix and the parallel data section of coming received frame by channel.
In another embodiment, verify the second lead code section by this way: reconfigure the shielding of receiver filter according to the second channel width, the receiver filter shielding that reconfigures with generation, wherein channel have the second channel width and comprise by multi-antenna transmitting defeated 2
MSubcarrier; Shield recognition training matrix from the second lead code section according to the receiver filter that reconfigures; Verify many antennas of second channel width training sequence of the second lead code section according to the shielding of the receiver filter of initial configuration and training matrix, wherein, when many antennas of second channel width training sequence checking by the time, receive data segment and comprise the parallel data section of coming received frame via channel according to receiver filter shielding that reconfigures and training matrix according to the receiver filter shielding that reconfigures.
In another embodiment, verify the second lead code section by this way: reconfigure the shielding of receiver filter according to the 3rd channel width, the receiver filter shielding that reconfigures with generation, wherein channel have the 3rd channel width and comprise by multi-antenna transmitting defeated 2
KIndividual subcarrier; Shield recognition training matrix from the second lead code section according to the receiver filter that reconfigures; Verify the 3rd many antennas of channel width training sequence of the second lead code section according to the shielding of the receiver filter that reconfigures and training matrix, wherein, when the 3rd many antennas of channel width training sequence checking by the time, receive data segment and comprise according to the receiver filter shielding that reconfigures and training matrix and the parallel data section of coming received frame by channel.
Processing proceeds to step 176, wherein the radio receiver second lead code section that judged whether empirical tests.If it's not true, then data processing is got back to step 150.If empirical tests the second lead code section, then handle proceeding to step 178, wherein radio receiver shields the data segment of received frame according to the receiver filter that reconfigures.In case received fully after the frame, handled repeating step 150 to receive frame subsequently.
Figure 11 is the logic diagram that is used in a kind of method of high data throughput wireless local area network received frame.Processing starts from step 180, and wherein radio receiver shields lead code by the channel received frame according to the receiver filter of acquiescence.Processing proceeds to step 182, wherein radio receiver checking lead code.Processing proceeds to step 184, and wherein radio receiver judges whether to have verified lead code, and this can be undertaken by two parts: first adopts the receiver filter shielding of acquiescence, and second portion adopts the receiver filter shielding that reconfigures.If not by checking, then handle and proceed to step 186, wherein radio receiver concludes that present frame is invalid, and waits for another frame of reception.
If empirical tests lead code, then handle proceeding to step 188, wherein radio receiver explains that lead code is to determine the high data throughput channel configuration; Handle then and proceed to step 190, wherein radio receiver shields according to the receiver filter that the high data throughput channel configuration reconfigures acquiescence, and the receiver filter that reconfigures with generation shields.Handle then and proceed to step 192, wherein radio receiver shields the data segment of received frame according to the receiver filter that reconfigures.
Persons of ordinary skill in the art may appreciate that term used herein " basically " or " pact " provide industry acceptable allowable deviation for its corresponding term.The scope of the acceptable allowable deviation of this industry is from less than 1% to 20%, and corresponding to but be not limited to component value, integrated circuit processing variation, variations in temperature, rising and fall time and/or thermal noise.Those of ordinary skill in the art it is also understood that, term used herein " operationally coupling " comprises by another element, unit, circuit or module coming directly or coupling indirectly, here for indirect coupling, get involved the information that element, unit, circuit or module can not change signal, but its current level of scalable, voltage level and/or power level.Those of ordinary skill in the art is further appreciated that the coupling (promptly a unit is by inferring and another unit coupling) of deduction comprises in the mode identical with " operationally coupling " and carrying out directly and coupling indirectly between two unit.Those of ordinary skill in the art is further appreciated that term used herein " advantageously compares " contrast of representing between two or more unit, item, the signal etc. expected relationship is provided.For example, when expected relationship is a signal 1 when having than the bigger amplitude of signal 2, so when the amplitude of signal 1 greater than the amplitude of signal 2 or when the amplitude of signal 2 during less than the amplitude of signal 1, just obtained effective comparative result.
The argumentation of front has proposed a kind of radio receiver that is used in processed frame in the high data throughput wireless local area network.Those of ordinary skill in the art is further appreciated that under the prerequisite of the scope that does not depart from claim, can derive other embodiment from disclosed content of the present invention.
Claims (10)
1. method that is used for receiving the frame of high data throughput wireless local area network is characterized in that described method comprises:
Before receiving described frame, the filter shielding according to first channel width of a plurality of channel widths disposes receiver shields with the receiver filter that produces first configuration;
Receive the first lead code section of described frame by channel, the wherein said first lead code section comprises first training sequence, second training sequence and high data throughput indication, wherein said first training sequence is in first group of subcarrier of described channel, second training sequence is in second group of subcarrier of described channel, and first group of subcarrier is the child group according to second group of subcarrier of the receiver filter shielding of first configuration;
On described first training sequence, carry out first validation test;
When described first validation test is successful, carry out second validation test of described second training sequence;
When described second validation test is successful, explain described high data throughput indication;
When described high data throughput indicates high data throughput, receive the second lead code section of described frame by described channel;
Shield according to the receiver filter that reconfigures and to verify the described second lead code section;
When the described second lead code section of empirical tests, shield the data segment that receives described frame according to the described receiver filter that reconfigures.
2. method according to claim 1 is characterized in that, described method also comprises:
When described high data throughput does not indicate high data throughput, shield and receive the data segment of described frame according to the receiver filter of described first configuration by described channel.
3. method according to claim 1 is characterized in that, the described explanation second lead code section comprises:
The channel format territory of explaining described second lead code is to determine the high data throughput channel configuration.
4. method according to claim 3 is characterized in that, described high data throughput channel configuration comprises at least a in following:
Have the second channel width in described a plurality of channel width, and include by 2 of single antenna reception
MIndividual subcarrier, wherein said second channel width is greater than described first channel width;
Have the 3rd channel width in described a plurality of channel width, and include by 2 of single antenna reception
KIndividual subcarrier, wherein said the 3rd channel width is less than described first channel width;
Have described first channel width, and include by 2 of many antennas receptions
NIndividual subcarrier;
Have described second channel width, and include by 2 of many antennas receptions
MIndividual subcarrier; With
Have described the 3rd channel width, and include by 2 of many antennas receptions
KIndividual subcarrier.
5. method that is used for receiving the frame of high data throughput wireless local area network is characterized in that described method comprises:
Receiver filter according to acquiescence shields the lead code that receives described frame by channel;
The checking lead code;
When empirical tests during described lead code, explain that described lead code is to determine the high data throughput channel configuration;
The receiver filter that reconfigures described acquiescence according to described high data throughput channel configuration shields, and the receiver filter that reconfigures with generation shields; With
Shield the data segment that receives described frame according to the described receiver filter that reconfigures.
6. method according to claim 5 is characterized in that, described high data throughput channel configuration comprises at least a in following:
Have first channel width in a plurality of channel widths, and include by 2 of single antenna reception
NIndividual subcarrier;
Have the second channel width in described a plurality of channel width, and include by 2 of single antenna reception
MIndividual subcarrier, wherein said second channel width is greater than described first channel width;
Have the 3rd channel width in described a plurality of channel width, and include by 2 of single antenna reception
KIndividual subcarrier, wherein said the 3rd channel width is less than described first channel width;
Have described first channel width, and include by 2 of many antennas receptions
NIndividual subcarrier;
Have described second channel width, and include by 2 of many antennas receptions
MIndividual subcarrier; With
Have described the 3rd channel width, and include by 2 of described many antennas receptions
KIndividual subcarrier.
7. a radio receiver is characterized in that, comprising:
Radio frequency (RF) front end, it operationally is coupled and becomes the immigration baseband signal with the RF conversion of signals of will entering a country;
Processing module; With
Be coupling in the memory on the described processing module, wherein said memory storage operational order, described operational order can make that described processing module is following operates:
Before receiving described immigration baseband signal, dispose the first lead code section of described frame according to first channel width of a plurality of channel widths, to produce the receiver filter shielding of first configuration;
The described first lead code section to described frame makes an explanation, to discern first training sequence, second training sequence and high data throughput indication, wherein said first training sequence is in first group of subcarrier of described channel, described second training sequence is in second group of subcarrier of described channel, and described first group of subcarrier is the child group according to described second group of subcarrier of the receiver filter shielding of described first configuration;
On described first training sequence, carry out first validation test;
When described first validation test is successful, carry out second validation test of described second training sequence;
When described second validation test is successful, explain described high data throughput indication;
When described high data throughput indicates high data throughput, shield according to the receiver filter that reconfigures and to verify the described second lead code section; With
When the described second lead code section of empirical tests, shield the data segment that receives described frame according to the described receiver filter that reconfigures.
8. radio receiver according to claim 7 is characterized in that described memory has also stored operational order, and described operational order can make that described processing module is following operates:
When described high data throughput does not indicate high data throughput, shield and handle the data segment of described frame according to the receiver filter of described first configuration by described channel.
9. a radio receiver is characterized in that, comprising:
Radio frequency (RF) front end, it operationally is coupled and becomes the immigration baseband signal with the RF conversion of signals of will entering a country;
Processing module; With
Be coupling in the memory on the described processing module, wherein said memory storage operational order, this operational order can make that described processing module is following operates:
Receiver filter according to acquiescence shields lead code by the described frame of described channel identification;
The checking lead code;
When empirical tests during lead code, explain that lead code is to determine the high data throughput channel configuration;
The receiver filter that reconfigures described acquiescence according to described high data throughput channel configuration shields, and the receiver filter that reconfigures with generation shields; With
Shield the data segment of handling described frame according to the described receiver filter that reconfigures.
10. radio receiver according to claim 9 is characterized in that, described high data throughput channel configuration comprises at least a in following:
Have first channel width in a plurality of channel widths, and include by 2 of single antenna reception
NSubcarrier;
Have the second channel width in described a plurality of channel width, and include by 2 of single antenna reception
MSubcarrier, wherein said second channel width is greater than described first channel width;
Have the 3rd channel width in described a plurality of channel width, and include by 2 of single antenna reception
KSubcarrier, wherein said the 3rd channel width is less than described first channel width;
Have described first channel width, and include by 2 of many antennas receptions
NIndividual subcarrier;
Have described second channel width, and include by 2 of described many antennas receptions
MIndividual subcarrier; With
Have described the 3rd channel width, and include by 2 of described many antennas receptions
KIndividual subcarrier.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US52452803P | 2003-11-24 | 2003-11-24 | |
| US60/524,528 | 2003-11-24 | ||
| US10/779,245 | 2004-02-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1722665A CN1722665A (en) | 2006-01-18 |
| CN100502289C true CN100502289C (en) | 2009-06-17 |
Family
ID=35912644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100977145A Expired - Fee Related CN100502289C (en) | 2003-11-24 | 2004-11-24 | High data throughput wireless local area network receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100502289C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3089728B1 (en) * | 2018-12-10 | 2022-04-15 | Sagemcom Energy & Telecom Sas | Device for receiving PLC signals |
-
2004
- 2004-11-24 CN CNB2004100977145A patent/CN100502289C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1722665A (en) | 2006-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8363642B2 (en) | High data throughput wireless local area network receiver | |
| US7978729B2 (en) | High data throughput WLAN frame format | |
| EP1533910B1 (en) | Configurable spectral mask for use in a high data throughput wireless communication | |
| US8559869B2 (en) | Smart channel selective repeater | |
| CN1716957B (en) | Method and device for wireless communication | |
| US6535748B1 (en) | Wireless communication transceiver having a dual mode of operation | |
| CN202906899U (en) | Transmitter front end with programmable notch filter | |
| US5745846A (en) | Channelized apparatus for equalizing carrier powers of multicarrier signal | |
| EP2612535B1 (en) | Apparatus and method for a multi-band radio operating in a wireless network | |
| CN1655555B (en) | Method, apparatus and system for multiple protocol wireless communications in a WLAN | |
| CN101449605A (en) | Method and apparatus for providing in-band wireless backhaul | |
| CN114726384A (en) | Switching circuit of antenna and electronic equipment | |
| CN1855748B (en) | Radio frequency transceiver integrated circuit | |
| CN106253916A (en) | For to sending the equipment and method being controlled | |
| US9913172B2 (en) | Method for enabling coexistence of multiple wireless communication modes in mobile terminal and mobile terminal thereof | |
| CN108023612A (en) | Communicator and the method for avoiding intermodulation distortion | |
| CN100502289C (en) | High data throughput wireless local area network receiver | |
| US20110134772A1 (en) | Methods of radio communication involving multiple radio channels, and radio signal repeater and mobile station apparatuses implementing same | |
| CN1984414A (en) | Multimode communication device and method of receiving multiple radio frequency signal therein | |
| KR101974550B1 (en) | Mobile base station apparatus | |
| KR101712230B1 (en) | Methods of radio communication involving multiple radio channels, and radio signal repeater and mobile station apparatuses implementing same | |
| CN116827361A (en) | Communication method and device | |
| CN116939828A (en) | Communication method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180508 Address after: Singapore Singapore Patentee after: Avago Technologies General IP (Singapore) Pte. Ltd. Address before: california Patentee before: BROADCOM Corp. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190828 Address after: Singapore Singapore Patentee after: Avago Technologies General IP (Singapore) Pte. Ltd. Address before: Singapore Singapore Patentee before: Avago Technologies General IP (Singapore) Pte. Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090617 |