CN106160981A - The determination method and device of channel information - Google Patents

Abstract

The invention provides the determination method and device of a kind of channel information, wherein, the method includes: send channel probe request frame to site STA, wherein, this channel probe request frame sends channel-sounding signal for request to STA, carries orthogonal code index value and/or the system frame number SFN of sub-carrier indices position of configuration on each antenna for determine access point AP in this channel probe request frame；Send channel-sounding signal frame to STA, wherein, this channel-sounding signal frame carries channel-sounding signal；Wherein, this orthogonal code index value and/or sub-carrier indices position, and channel-sounding signal is for determining the channel information between site STA and AP.By the present invention, solve and determine the inefficient problem of channel detection present in correlation technique, and then reached to improve the effect of channel detection efficiency.

Description

The determination method and device of channel information

Technical field

The present invention relates to the communications field, in particular to the determination method and device of a kind of channel information.

Background technology

Traditional WLAN (Wireless Local, referred to as WLAN) channel detection uses filled band width Mode carry out, the most each antenna send take whole bandwidth subcarrier, use the mode of orthogonal matrix between antenna Isolating, multiple antennas needs multiple OFDMs (Orthogonal Frequency Division Multiplexing, referred to as OFDM) symbol detects, and in the case of multiple antennas, the efficiency of detection is inclined Low.

For the inefficient problem of channel detection present in correlation technique, effective solution party is the most not yet proposed Case.

Summary of the invention

The invention provides the determination method and device of a kind of channel information, at least to solve correlation technique exists The inefficient problem of channel detection.

According to an aspect of the invention, it is provided a kind of determination method of channel information, including: to website STA sends channel probe request frame, and wherein, described channel probe request frame is sent out to described STA for request Channels detectable signal, carries each antenna for determining access point AP in described channel probe request frame The orthogonal code index value of upper configuration and/or the system frame number SFN of sub-carrier indices position；Send out to described STA Send described channel-sounding signal frame, wherein, described channel-sounding signal frame carries described channel-sounding signal； Wherein, described orthogonal code index value and/or described sub-carrier indices position, and described channel-sounding signal For determining the channel information between described site STA and described AP.

Further, send described channel-sounding signal frame to described STA to include: sending described channel After predetermined time interval after probe request, according on each antenna of described AP configuration orthogonal code to Described STA sends described channel-sounding signal frame.

Further, described method also includes: determine corresponding orthogonal of each antenna described according to described SFN Index value in code word group；According to index value in described orthogonal code group and predetermined orthogonal code packet index Value determines the orthogonal code index value corresponding with described orthogonal code.

Further, index value bag in the orthogonal code group that each antenna described is corresponding is determined according to described SFN Include: utilize equation below to determine index value Ci:Ci=mod (nka+SFN, Ka) in described orthogonal code group, Wherein, nka is each antenna index value of described AP, and Ka is the number of the antenna of described AP.

Further, send described channel-sounding signal frame to described STA to include: sending described channel After predetermined time interval after probe request, according on each antenna of described AP configuration be used for send institute The index position of the subcarrier stating channel-sounding signal sends described channel-sounding signal frame.

Further, described method also comprise determining that on each antenna of described AP configuration for sending State the subcarrier number of channel-sounding signal frame；Index offsets Δ f is determined according to described SFN；According to determine Described subcarrier number, described transmission symbolic number index corresponding with described channel-sounding signal for Δ f determine described The described sub-carrier indices position of configuration on each antenna of AP.

Further, described Δ f is obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BW The total number of subcarrier distributed by each antenna of described AP；Described sub-carrier indices position is by following public Formula obtains: ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, Ka is The number of the antenna of described AP, ti is described transmission symbolic number index and ti=0, and 1,2..., k are described subcarrier The span of index position and described k is [0, SC_BW-1], ki is i-th antenna and the ki=i of corresponding distribution.

Further, it is determined that on each antenna of described AP configuration be used for send described channel-sounding signal frame Subcarrier number include: utilize equation below to determine the described subcarrier number of configuration on each antenna described:Wherein, Ka is the number of the antenna of described AP, SC_BWEach antenna for described AP The total number of subcarrier distributed.

According to a further aspect in the invention, it is provided that a kind of determination method of channel information, including: receive access Point AP sends channel probe request frame, and wherein, described channel probe request frame is used for asking to send channel detection Signal, carries system frame number SFN in described channel probe request frame；Receive the channel spy that described AP sends Survey signal frame, wherein, described channel-sounding signal frame carries described channel-sounding signal；According to described SFN determines orthogonal code index value and/or the sub-carrier indices position of configuration on each antenna of described AP； According to described orthogonal code index value and/or described sub-carrier indices position, and described channel-sounding signal is true Determine the channel information between site STA and described AP.

Further, the described channel-sounding signal frame receiving described AP transmission includes: receives described AP and exists After having sent the predetermined time interval after described channel probe request frame, according to on each antenna of described AP The described channel-sounding signal frame that the orthogonal code of configuration sends.

Further, the described orthogonal of configuration is determined on each antenna port of described AP according to described SFN Codewords indexes value includes: determine index value in the orthogonal code group that each antenna described is corresponding according to described SFN； Visit according to index value in described orthogonal code group and the channel of the described AP sent by described AP received in advance The orthogonal code packet index value surveyed determines described orthogonal code index value.

Further, index in determining, according to described SFN, the described orthogonal code group that each antenna described is corresponding Value includes: utilize equation below to determine index value Ci in described orthogonal code group: Ci=mod (nka+SFN, Ka), wherein, nka is each antenna index value of described AP, and Ka is described The number of the antenna of AP.

Further, the described channel-sounding signal frame receiving described AP transmission includes: receives described AP and exists After having sent the predetermined time interval after described channel probe request frame, join according on each antenna of described AP The described channel-sounding signal that the index position of the subcarrier for sending described channel-sounding signal put sends Frame.

Further, the sub-carrier indices position of configuration on each antenna of described AP is determined according to described SFN Put and comprise determining that the son load for sending described channel-sounding signal frame of configuration on each antenna of described AP Ripple number；Index offsets Δ f is determined according to described SFN；According to the described subcarrier number determined, described Δ f The transmission symbolic number index corresponding with the described channel-sounding signal that described AP sends determines each of described AP The described sub-carrier indices position of configuration on antenna.

Further, described Δ f is obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BW The total number of subcarrier distributed by each antenna of described AP；Described sub-carrier indices position is by following public Formula obtains: ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, ti is institute Stating transmission symbolic number index and ti=0,1,2..., k are described sub-carrier indices position and the span of described k For [0, SC_BW-1], ki is i-th antenna and the ki=i of corresponding distribution.

Further, it is determined that on each antenna of described AP configuration be used for send described channel-sounding signal frame Subcarrier number include: utilize equation below to determine the described subcarrier number of configuration on each antenna described:Wherein, Ka is the number of the antenna of described AP, SC_BWEach antenna for described AP The total number of subcarrier distributed.

Further, according to described sub-carrier indices position, and described channel-sounding signal determines site STA And the channel information between described AP includes: according to the described AP received on described sub-carrier indices position The channel-sounding signal of each antenna the channel information between described STA and described AP is estimated；Logical Cross the result to described estimation and carry out the channel letter that the mode of interpolation processing determines between described STA and described AP Breath.

According to a further aspect in the invention, it is provided that the determination device of a kind of channel information, including: first send Module, for sending channel probe request frame to site STA, wherein, described channel probe request frame is used for Ask to send channel-sounding signal to described STA, described channel probe request frame carries and connects for determining The orthogonal code index value configured on each antenna of access point AP and/or the System Frame Number of sub-carrier indices position SFN；Second sending module, for sending described channel-sounding signal frame to described STA, wherein, described Channel-sounding signal frame carries described channel-sounding signal；Wherein, described orthogonal code index value and/or Described sub-carrier indices position, and described channel-sounding signal is used for determining described site STA and described AP Between channel information.

Further, described second sending module includes: making a reservation for after having sent described channel probe request frame After time interval, send to described STA according to the orthogonal code of configuration on each antenna of described AP described in Channel-sounding signal frame.

Further, described device also includes: first determines module, described for determining according to described SFN Index value in the orthogonal code group that each antenna is corresponding；Second determines module, for according to described orthogonal code group Interior index value determines the orthogonal code corresponding with described orthogonal code with predetermined orthogonal code packet index value Word indexing value.

Further, described first determines that module includes: utilize equation below to determine rope in described orthogonal code group Drawing value Ci:Ci=mod (nka+SFN, Ka), wherein, nka is each antenna index value of described AP, Ka Number for the antenna of described AP.

Further, described second sending module includes: making a reservation for after having sent described channel probe request frame After time interval, according to the son for sending described channel-sounding signal of configuration on each antenna of described AP The described channel-sounding signal frame that the index position of carrier wave sends.

Further, described device also includes: the 3rd determines module, for determining each antenna of described AP The subcarrier number for sending described channel-sounding signal frame of upper configuration；4th determines module, for basis Described SFN determines index offsets Δ f；5th determines module, for according to the described subcarrier number determined, Described transmission symbolic number index corresponding with described channel-sounding signal for Δ f determines on each antenna of described AP The described sub-carrier indices position of configuration.

Further, described Δ f is obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BW The total number of subcarrier distributed by each antenna of described AP；Described sub-carrier indices position is by following public Formula obtains: ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, Ka is The number of the antenna of described AP, ti is described transmission symbolic number index and ti=0, and 1,2..., k are described subcarrier The span of index position and described k is [0, SC_BW-1], ki is i-th antenna and the ki=i of corresponding distribution.

Further, the described 3rd determines that module includes: utilizes equation below to determine on each antenna described and configures Described subcarrier number:Wherein, Ka is the number of the antenna of described AP, SC_BWFor The total number of subcarrier that each antenna of described AP is distributed.

According to a further aspect in the invention, it is provided that the determination device of a kind of channel information, including: first receive Module, for receiving the channel probe request frame that access point AP sends, wherein, described channel probe request frame Sent channel-sounding signal for request by described AP, described channel probe request frame carries System Frame Number SFN；Second receiver module, for receiving the channel-sounding signal frame that described AP sends, wherein, described letter Road detectable signal frame carries described channel-sounding signal；6th determines module, for according to described SFN Determine orthogonal code index value and/or the sub-carrier indices position of configuration on each antenna of described AP；7th is true Cover half block, is used for according to described orthogonal code index value and/or described sub-carrier indices position, and described letter Road detectable signal determines the channel information between site STA and described AP.

Further, described second receiver module includes: receive described AP sent described channel detection please After seeking the predetermined time interval after frame, according to send for the orthogonal code of configuration on each antenna of described AP Described channel-sounding signal frame.

Further, when according to described SFN determine on each antenna port of described AP configuration described just When handing over codewords indexes value, the described 6th determines that module includes: first determines unit, for according to described SFN Determine index value in the orthogonal code group that each antenna described is corresponding；Second determines unit, for according to described just Hand over index value in code word group and the orthogonal code of the channel detection of the described AP sent by described AP received in advance Word packet index value determines described orthogonal code index value.

Further, described first determines that unit includes: utilize equation below to determine rope in described orthogonal code group Drawing value Ci:Ci=mod (nka+SFN, Ka), wherein, nka is each antenna index value of described AP, Ka Number for the antenna of described AP.

Further, described second receiver module includes: receive described AP sent described channel detection please After seeking the predetermined time interval after frame, according on each antenna of described AP configuration be used for send described channel The described channel-sounding signal frame that the index position of the subcarrier of detectable signal sends.

Further, when determining the sub-carrier indices of configuration on each antenna of described AP according to described SFN During position, the described 6th determines that module includes: the 3rd determines unit, for determining each antenna of described AP The subcarrier number for sending described channel-sounding signal frame of upper configuration；4th determines unit, for basis Described SFN determines index offsets Δ f；5th determines unit, for according to the described subcarrier number determined, Transmission symbolic number index corresponding with the described channel-sounding signal that described AP sends for described Δ f determines described AP Each antenna on configuration described sub-carrier indices position.

Further, described Δ f is obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BW The total number of subcarrier distributed by each antenna of described AP；Described sub-carrier indices position is by following public Formula obtains: ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, ti is institute Stating transmission symbolic number index and ti=0,1,2..., k are described sub-carrier indices position and the span of described k For [0, SC_BW-1], ki is i-th antenna and the ki=i of corresponding distribution.

Further, the described 3rd determines that unit includes: utilizes equation below to determine on each antenna described and configures Described subcarrier number:Wherein, Ka is the number of the antenna of described AP, SC_BWFor The total number of subcarrier that each antenna of described AP is distributed.

Further, when according to described sub-carrier indices position, and described channel-sounding signal determines website During channel information between STA and described AP, the described 7th determines that module includes: estimation unit, for root According to the channel-sounding signal of each antenna of the described AP of reception on described sub-carrier indices position to described Channel information between STA and described AP is estimated；6th determines unit, for by described estimation Result carry out the mode of interpolation processing and determine the channel information between described STA and described AP.

By the present invention, use and send channel probe request frame, wherein, described channel detection to site STA Claim frame sends channel-sounding signal for request to described STA, carries in described channel probe request frame The orthogonal code index value configured on each antenna determine access point AP and/or sub-carrier indices position System frame number SFN；Described channel-sounding signal frame, wherein, described channel detection is sent to described STA Signal frame carries described channel-sounding signal；Wherein, described orthogonal code index value and/or described sub-load Ripple index position, and described channel-sounding signal is for determining the letter between described site STA and described AP Road information, solves the inefficient problem of channel detection present in correlation technique, and then has reached raising channel The effect of detection efficient.

Accompanying drawing explanation

Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, The schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention. In the accompanying drawings:

Fig. 1 is the flow chart of the determination method of the first channel information according to embodiments of the present invention；

Fig. 2 is the flow chart of the determination method of the second channel information according to embodiments of the present invention；

Fig. 3 is the structured flowchart of the determination device of the first channel information according to embodiments of the present invention；

Fig. 4 is the preferred structure block diagram one of the determination device of the first channel information according to embodiments of the present invention；

Fig. 5 is the preferred structure block diagram two of the determination device of the first channel information according to embodiments of the present invention；

Fig. 6 is the structured flowchart of the determination device of the second channel information according to embodiments of the present invention；

Fig. 7 be the second channel information according to embodiments of the present invention determination device in the 6th determine module 66 Structured flowchart one；

Fig. 8 be the second channel information according to embodiments of the present invention determination device in the 6th determine module 66 Structured flowchart two；

Fig. 9 be the second channel information according to embodiments of the present invention determination device in the 7th determine module 68 Structured flowchart；

Figure 10 is down channel detection process schematic diagram according to embodiments of the present invention；

Figure 11 is frequency domain resource interval distribution schematic diagram according to embodiments of the present invention.

Detailed description of the invention

Below with reference to accompanying drawing and describe the present invention in detail in conjunction with the embodiments.It should be noted that do not rushing In the case of Tu, the embodiment in the application and the feature in embodiment can be mutually combined.

Providing a kind of determination method of channel information in the present embodiment, Fig. 1 is according to embodiments of the present invention The flow chart of the determination method of the first channel information, as it is shown in figure 1, this flow process comprises the steps:

Step S102, sends channel probe request frame to site STA, and wherein, this channel probe request frame is used Send channel-sounding signal in request to STA, this channel probe request frame carries for determining access point The orthogonal code index value configured on each antenna of AP and/or the System Frame Number of sub-carrier indices position (System Frame Number, referred to as SFN)；

Step S104, sends channel-sounding signal frame to STA, wherein, carries in this channel-sounding signal frame There is channel-sounding signal；Wherein, this orthogonal code index value and/or sub-carrier indices position, and channel spy Survey signal for determining the channel information between site STA and AP.

By above-mentioned steps, believe according to orthogonal code index value and/or sub-carrier indices position and channel detection Breath determines channel information, can realize individualized training symbol the soonest and obtain the channel letter of full bandwidth whole day line Cease or improve the diversity gain of frequency domain and time domain, thus improve the efficiency obtaining channel information, and according to acquisition Channel information may determine that the situation of channel, such as, channel quality, and then achieve and improve channel detection Efficiency.Thus solve the inefficient problem of channel detection present in correlation technique, and then reach to improve letter The effect of road detection efficient.

When STA sends channel-sounding signal frame, can be there to be multiple transmission mode, an optional enforcement In example, can be after the predetermined time interval after having sent channel probe request frame, according to each antenna of AP The orthogonal code of upper configuration sends channel-sounding signal frame to STA, and this predetermined time interval can be short interframe Spacing is spaced.

In an optional embodiment, it is also possible to determine orthogonal code, including: determine each according to SFN Index value in the orthogonal code group that antenna is corresponding；According to index value in orthogonal code group and predetermined orthogonal code Word packet index value determines the orthogonal code index value corresponding with orthogonal code.And then configure according on each antenna Orthogonal code send channel-sounding signal.

When determining index value in the orthogonal code group that each antenna is corresponding according to SFN, it is possible to use equation below Determining index value Ci:Ci=mod (nka+SFN, Ka) in orthogonal code group, wherein, nka is each of AP Individual antenna index value, Ka is the number of the antenna of AP.

In another optional embodiment, send channel-sounding signal frame to STA and may include that in transmission After predetermined time interval after complete channel probe request frame, according on each antenna of AP configuration be used for send The index position of the subcarrier of channel-sounding signal sends channel-sounding signal frame, and this predetermined time interval can be Short interframe space is spaced.

Accordingly, said method also includes the index position obtaining subcarrier, in an optional embodiment, Can be according to configuration on each antenna of AP after the predetermined time interval after having sent channel probe request frame Subcarrier is obtained for sending before the index position of the subcarrier of channel-sounding signal sends channel-sounding signal Index position, it is of course possible to obtain this sub-carrier indices position in other moment, obtains the index position of subcarrier Comprise determining that the subcarrier number for sending channel-sounding signal frame of configuration on each antenna of AP；Root Index offsets Δ f is determined according to SFN；Corresponding with channel-sounding signal according to this subcarrier number determined, Δ f Transmission symbolic number index determine on each antenna of AP the sub-carrier indices position of configuration.

Wherein, above-mentioned Δ f can be obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BW The total number of subcarrier distributed by each antenna of AP；Sub-carrier indices position can be obtained by equation below Take: ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, Ka is AP The number of antenna, ti is for sending symbolic number index and ti=0, and 1,2..., k are taking of sub-carrier indices position and k Value scope is [0, SC_BW-1], ki is i-th antenna and the ki=i of corresponding distribution.

Wherein, the subcarrier for sending channel-sounding signal frame of configuration on each antenna determine AP During number, can be in the following way: utilize equation below to determine on each antenna the subcarrier number of configuration:Wherein, Ka is the number of the antenna of AP, SC_BWDistributed by each antenna of AP The total number of subcarrier.

Fig. 2 is the flow chart of the determination method of the second channel information according to embodiments of the present invention, such as Fig. 2 Shown in, this flow process comprises the steps:

Step S202, receives the channel probe request frame that access point AP sends, wherein, this channel probe request Frame is sent channel-sounding signal for request by AP, carries system frame number SFN in this channel probe request frame；

Step S204, receives the channel-sounding signal frame that above-mentioned AP sends, wherein, this channel-sounding signal frame In carry channel-sounding signal；

Step S206, determines orthogonal code index value and/or the son of configuration on each antenna of AP according to SFN Carrier index position；

Step S208, according to orthogonal code index value and/or sub-carrier indices position, and channel-sounding signal Determine the channel information between site STA and AP.

By above-mentioned steps, when determining the channel information between STA and AP, can be according to orthogonal code rope Draw value and/or sub-carrier indices position and channel detection information determines, single instruction can be realized the soonest Practice symbol obtain the channel information of full bandwidth whole day line or improve the diversity gain of frequency domain and time domain, thus improve Obtain the efficiency of channel information, and then achieve the efficiency improving channel detection.Thus solve in correlation technique The inefficient problem of channel detection existed, and then reached to improve the effect of channel detection efficiency.

The channel-sounding signal frame receiving AP transmission can be there to be multiple reception mode, in an optional embodiment In, can by receiving after AP predetermined time interval after having sent channel probe request frame, according to for The channel-sounding signal frame that on each antenna of AP, the orthogonal code of configuration sends, this predetermined time interval is permissible It it is short interframe space interval.

When determining above-mentioned orthogonal code index value, multiple mode can be determined, an optional enforcement to have In example, determine that on each antenna port of AP, the orthogonal code index value of configuration includes according to SFN: according to SFN determines index value in the orthogonal code group that each antenna is corresponding；According to index value in orthogonal code group and in advance The orthogonal code packet index value of the channel detection of the AP sent by AP received determines orthogonal code index value. Wherein, the orthogonal code packet index value received in advance can be beforehand through beacon frame or by other by AP Mode is sent to STA's.

In an optional embodiment, index in determining, according to SFN, the orthogonal code group that each antenna is corresponding Value includes: utilize equation below to determine index value Ci:Ci=mod (nka+SFN, Ka) in orthogonal code group, Wherein, nka is each antenna index value of AP, and Ka is the number of the antenna of AP.This antenna index and sky The number of line can also obtain by receiving the broadcast of AP.

In another optional embodiment, when receiving the channel-sounding signal frame that AP sends, can pass through After receiving AP predetermined time interval after having sent channel probe request frame, according on each antenna of AP The channel-sounding signal frame that the index position of the subcarrier for sending channel-sounding signal of configuration sends, this is pre- Fix time interval can be short interframe space interval.

In an optional embodiment, determine the subcarrier rope of configuration on each antenna of AP according to SFN Draw position and comprise determining that the subcarrier for sending channel-sounding signal frame of configuration on each antenna of AP Number；Index offsets Δ f is determined according to SFN；The channel sent according to the subcarrier number determined, Δ f and AP The transmission symbolic number index that detectable signal is corresponding determines the sub-carrier indices position of configuration on each antenna of AP.

Wherein, above-mentioned Δ f can be obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BW The total number of subcarrier distributed by each antenna of AP；Sub-carrier indices position can be obtained by equation below Taking: ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, ti is for sending symbol Count index and ti=0,1,2..., k be the span of sub-carrier indices position and k be [0, SC_BW-1], ki is The i-th antenna of corresponding distribution and ki=i.

Wherein it is determined that the subcarrier number for sending channel-sounding signal frame of configuration on each antenna of AP Including: utilize equation below to determine on each antenna the subcarrier number of configuration:Wherein, Ka For the number of the antenna of AP, SC_BWThe total number of subcarrier distributed by each antenna of AP.

In an optional embodiment, according to sub-carrier indices position, and channel-sounding signal determines website Channel information between STA and AP includes: according to each sky of the AP received on sub-carrier indices position Channel information between STA and AP is estimated by the channel-sounding signal of line；By the result estimated is entered The mode that row interpolation processes determines the channel information between STA and AP.

Additionally providing the determination device of a kind of channel information in the present embodiment, this device is used for realizing above-mentioned enforcement Example and preferred implementation, carried out repeating no more of explanation.As used below, term " module " The software of predetermined function and/or the combination of hardware can be realized.Although the device described by following example is preferable Ground realizes with software, but hardware, or the realization of the combination of software and hardware also may and be contemplated.

Fig. 3 is the structured flowchart of the determination device of the first channel information according to embodiments of the present invention, such as Fig. 3 Shown in, this device includes the first sending module 32 and the second sending module 34, illustrates this device below.

First sending module 32, for sending channel probe request frame to site STA, wherein, this channel is visited Survey claim frame for request to STA send channel-sounding signal, this channel probe request frame carries for Determine on each antenna of access point AP the orthogonal code index value of configuration and/or sub-carrier indices position is System frame number SFN；Second sending module 34, is connected to above-mentioned first sending module 32, for sending to STA Channel-sounding signal frame, wherein, carries channel-sounding signal in this channel-sounding signal frame；Wherein, this is being just Hand over codewords indexes value and/or sub-carrier indices position, and channel-sounding signal is used for determining site STA and AP Between channel information.

In an optional embodiment, above-mentioned second sending module 34 includes: please having sent channel detection After seeking the predetermined time interval after frame, send to STA according to the orthogonal code of configuration on each antenna of AP Channel-sounding signal frame, this predetermined time interval can be short interframe space interval.

Fig. 4 is the preferred structure block diagram one of the determination device of the first channel information according to embodiments of the present invention, As shown in Figure 4, this device, in addition to including all modules shown in Fig. 3, also includes that first determines module 42 He Second determines module 44, it should be noted that this first determines that module 42 and second determines module 44 and Fig. 3 In the position relationship of each module can be multiple, below first to determine index value and orthogonal code in orthogonal code group Index value, then illustrate as a example by STA sends channel-sounding signal frame.

First determines module 42, index value in determine the orthogonal code group that each antenna is corresponding according to SFN； Second determines module 44, is connected to above-mentioned first and determines module 42 and the second sending module 34, for according to just Hand over index value in code word group determine with predetermined orthogonal code packet index value corresponding with orthogonal code just Hand over codewords indexes value.

In an optional embodiment, above-mentioned first determines that module 42 includes: utilize equation below just to determine Handing over index value Ci:Ci=mod (nka+SFN, Ka) in code word group, wherein, nka is each antenna of AP Index value, Ka is the number of the antenna of AP.

The second above-mentioned sending module 34 may include that the scheduled time after having sent channel probe request frame Behind interval, according to the index bit of the subcarrier for sending channel-sounding signal of configuration on each antenna of AP Putting the channel-sounding signal frame of transmission, this predetermined time interval can be short interframe space interval.

Fig. 5 is the preferred structure block diagram two of the determination device of the first channel information according to embodiments of the present invention, As it is shown in figure 5, this device is in addition to including all modules shown in Fig. 3, also include the 3rd determine module 52, 4th determines that module 54 and the 5th determines module 56, it should be noted that the 3rd determines module the 52, the 4th Determine that module the 54, the 5th determines that the position relationship of each module can be multiple to module 56 with Fig. 3, below with First determine that subcarrier number determines index offsets and sub-carrier indices position again, send channel to STA the most again Illustrate as a example by detectable signal frame.

3rd determines module 52, for determine on each antenna of AP configuration for sending channel-sounding signal The subcarrier number of frame；4th determines module 54, is connected to the above-mentioned 3rd and determines module 52, for according to SFN Determine index offsets Δ f；5th determines module 56, is connected to the above-mentioned 4th and determines that module 54 and second sends Module 34, for according to the subcarrier number determined, transmission symbolic number rope corresponding with channel-sounding signal for Δ f Draw and determine the sub-carrier indices position of configuration on each antenna of AP.

Above-mentioned Δ f can be obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BWFor The total number of subcarrier that each antenna of AP is distributed；Sub-carrier indices position can be obtained by equation below: Ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, Ka is the antenna of AP Number, ti for send symbolic number index and ti=0,1,2..., k are the span of sub-carrier indices position and k For [0, SC_BW-1], ki is i-th antenna and the ki=i of corresponding distribution.

In an optional embodiment, above-mentioned the 3rd determines that module 52 includes: utilize equation below to determine The subcarrier number of configuration on each antenna:Wherein, Ka is the number of the antenna of AP, SC_BWThe total number of subcarrier distributed by each antenna of AP.

Fig. 6 is the structured flowchart of the determination device of the second channel information according to embodiments of the present invention, such as Fig. 6 Shown in, this device includes that first receiver module the 62, second receiver module the 64, the 6th determines module 66 and the 7th Determine module 68, below this device is illustrated.

First receiver module 62, for receiving the channel probe request frame that access point AP sends, wherein, this letter Road probe request is sent channel-sounding signal for request by AP, carries be in this channel probe request frame System frame number SFN；Second receiver module 64, is connected to above-mentioned first receiver module 62, is used for receiving AP and sends out The channel-sounding signal frame sent, wherein, carries channel-sounding signal in this channel-sounding signal frame；6th is true Cover half block 66, is connected to above-mentioned second receiver module 64, for determining each antenna of AP according to SFN The orthogonal code index value of configuration and/or sub-carrier indices position；7th determines module 68, is connected to above-mentioned Six determine module 66, are used for according to orthogonal code index value and/or sub-carrier indices position, and channel detection Signal determines the channel information between site STA and AP.

In an optional embodiment, above-mentioned second receiver module 64 includes: receives AP and is sending letter After predetermined time interval after road probe request, send out according to for the orthogonal code of configuration on each antenna of AP The channel-sounding signal frame sent, this predetermined time interval can be short interframe space interval.

Fig. 7 be the second channel information according to embodiments of the present invention determination device in the 6th determine module 66 Structured flowchart one, as it is shown in fig. 7, the 6th determines that module 66 includes that first determines that unit 72 and second is true To the 6th, cell 74, determines that module 66 illustrates below.

First determines unit 72, for when determine on each antenna port of AP the orthogonal of configuration according to SFN During codewords indexes value, determine index value in the orthogonal code group that each antenna is corresponding according to SFN；Second determines Unit 74, is connected to above-mentioned first and determines unit 72, for according to index value in orthogonal code group and connecing in advance The orthogonal code packet index value of the channel detection of the AP sent by AP received determines orthogonal code index value.

Above-mentioned first determines that unit 72 may include that and utilizes equation below to determine index value in orthogonal code group Ci:Ci=mod (nka+SFN, Ka), wherein, nka is each antenna index value of AP, and Ka is AP The number of antenna.

The second above-mentioned receiver module 64 can also include: receives AP after having sent channel probe request frame Predetermined time interval after according on each antenna of AP configuration for sending the subcarrier of channel-sounding signal Index position send channel-sounding signal frame, this predetermined time interval can be short interframe space interval.

Fig. 8 be the second channel information according to embodiments of the present invention determination device in the 6th determine module 66 Structured flowchart two, as shown in Figure 8, the 6th determines that module 66 includes that the 3rd determines that unit the 82, the 4th is true Cell 84 and the 5th determines unit 86, determines that module 66 illustrates to the 6th below, wherein, and can First to determine that on each antenna, the subcarrier number of configuration determines sub-carrier indices position again, it is also possible to first determine son Carrier index position, then determine the subcarrier number of configuration on each antenna, enter as a example by the first situation below Row explanation.

3rd determines unit 82, for determine on each antenna of AP configuration for sending described channel detection The subcarrier number of signal frame；4th determines unit 84, is connected to the above-mentioned 3rd and determines unit 82, for working as When determining the sub-carrier indices position of configuration on each antenna of AP according to SFN, determine index according to SFN Bias Δ f；5th determines unit 86, is connected to the above-mentioned 4th and determines unit 84, for according to the son load determined The transmission symbolic number that the channel-sounding signal of ripple number, Δ f with AP transmission is corresponding indexes each sky determining AP The sub-carrier indices position of configuration on line.

Above-mentioned Δ f can be obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BWFor The total number of subcarrier that each antenna of AP is distributed；Sub-carrier indices position can be obtained by equation below: Ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, ti is for sending symbolic number Index and ti=0,1,2..., k be the span of sub-carrier indices position and k be [0, SC_BW-1], ki is right The i-th antenna that should distribute and ki=i.

Wherein, the above-mentioned 3rd determines that unit 82 includes: utilize equation below to determine configuration on each antenna Subcarrier number:Wherein, Ka is the number of the antenna of AP, SC_BWFor each of AP The total number of subcarrier that antenna is distributed.

Fig. 9 be the second channel information according to embodiments of the present invention determination device in the 7th determine module 68 Structured flowchart, as it is shown in figure 9, the 7th determines that module 68 includes that estimation unit 92 and the 6th determines unit 94, determine that module 68 illustrates to the 7th below.

Estimation unit 92, the channel for each antenna according to the AP received on sub-carrier indices position is visited Survey signal the channel information between STA and AP is estimated；6th determines unit 94, is connected to above-mentioned Estimation unit 92, for determining between STA and AP by the way of the result estimated is carried out interpolation processing Channel information.

Separately below for channel detection process, broadcast message configuration process and the determination of concrete channel information Process illustrates.

Channel detection process:

Figure 10 is down channel detection process schematic diagram according to embodiments of the present invention, below in conjunction with Figure 10 to letter Road detection process illustrates.

AP sends channel probe request frame to STA, and channel probe request frame includes detection sequence index value；

AP is after having sent channel probe request frame, at short interframe space (Short InterFrame subsequently Spacing, referred to as SIFS) interval after send channel detection frame immediately；

STA, after receiving channel probe request frame, obtains the detection sequence index that channel probe request frame carries Value；

After STA has received channel probe request frame, it is spaced follow-up continued access at SIFS subsequently and receives channel detection frame；

After STA receives channel detection frame, the detection sequence index value carried in conjunction with channel probe request frame, meter Calculate the channel detection sequence that transmitting terminal is corresponding, estimate that AP transmitting terminal is eated dishes without rice or wine to STA receiving terminal according to detection sequence Between corresponding channel information；

Broadcast message configuration process:

High-level signaling notifies the channel detection orthogonal code packet index value that current AP configures；Wherein, orthogonal code Word is grouped according to 4 orthogonal sequences, the corresponding different AP of each packet, the group inner code word of each packet The different antennae of this AP can be allocated to respectively；

AP carry in beacon Beacon frame this AP configuration channel detection orthogonal code packet index value and Emission maximum spatial stream number/antenna port the number of AP；

The channel detection orthogonal code packet index of this AP configuration is obtained after the Beacon frame of STA acquisition AP Value and the emission maximum spatial flow/antenna port number of AP；

Specific implementation 1:

AP broadcasts the orthogonal code packet index value of the channel detection of this AP by Beacon frame；

STA can obtain the orthogonal code sequence set of AP channel detection after receiving Beacon frame；

AP end sends channel probe request frame, carries detection sequence index value SFN；

AP end difference launches the orthogonal sequence code word that antenna assignment is different；

Antenna port can be in the way of using fixing mapping with codewords indexes, as shown in table 1；

Table 1

Antenna index	Antenna port 0	Antenna port 1	…	Antenna port N
					Index in code word group	Orthogonal code 0	Orthogonal code 1	…	Orthogonal code N

Antenna port can be in the way of employing determines according to detection index value SFN with codewords indexes, such as following table institute Show；

Ci=mod (nka+SFN, Ka)

Wherein, Ka is number of antennas, and Ci is corresponding codewords indexes value, and nka is antenna port index value；

STA receives channel probe request frame, obtains detection sequence index value SFN information, according to SFN information Be calculated index value in the orthogonal code group that each antenna port is corresponding, according to Beacon frame obtain orthogonal Code word packet index value also combines index value in orthogonal code group, can be calculated the configuration of each antenna port Real orthogonal code index value；

At the transmission time slot of channel detection frame, each antenna of AP carries out channel spy according to the orthogonal code of distribution Survey the transmission of frame signal；

STA is receiving the channel detection frame signal that time slot obtains that receives of detection frame signal, and corresponding according to antenna Orthogonal code carry out channel estimation, obtain the channel information of multiple antennas full bandwidth between AP and STA；

Specific implementation 2:

AP end sends channel probe request frame, carries detection sequence index value SFN；

AP end calculates difference and launches the frequency domain resource of antenna assignment；

Calculate the subcarrier number that each antenna is distributed；

Ka is number of antennas, SC_BWBandwidth subcarrier number；

Calculate the subcarrier index value that each antenna is corresponding, frequency domain resource distribution and the channel detection sequence rope of antenna Draw value, transmitting antenna number and transmission symbolic number index value to be correlated with；

The resource interval method of salary distribution

Ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka)

Δ f=mod (SFN, SC_BW), Δ f is index offsets, and SFN is the sequence index value of channel detection frame；

Ti=0,1,2... for sending symbolic number index, and the span of k is [0, SC_BW-1]；

Ki=i, the i-th antenna of corresponding distribution；

STA receives channel probe request frame, obtains detection sequence index value SFN information；

At the transmission time slot of channel detection frame, each antenna carries out detectable signal according to the sub-carrier positions of distribution Send；

STA is receiving the reception time slot of detectable signal according to the index offsets Δ f value obtained and the transmitting of correspondence Notation index value (is launched notation index value and is referred to the OFDM symbol number index value that transmitting terminal is launched), obtains The sub-carrier indices position that the channel-sounding signal of each antenna is corresponding, obtains the letter that each antenna correspondence receives Road detectable signal, carries out channel according to the channel-sounding signal received and estimates to use between frequency interpolation simultaneously Mode, obtains the channel information of multiple antennas full bandwidth between AP and STA.

Below in conjunction with specific embodiment, technical scheme is described in detail.

Embodiment 1:

Below with 20M bandwidth, AP configures 4 antennas, 802.11n standard, uses different orthogonal between antenna Code word configures, and detection sequence index value SFN is 1, and the orthogonal code packet index value of AP configuration is 1, says The mode of bright multi-antenna channel of the present invention detection.

AP broadcasts the orthogonal code packet index value 1 of the channel detection of this AP by Beacon frame；

STA can obtain the orthogonal code sequence set of AP channel detection after receiving Beacon frame；

AP end sends channel probe request frame, carries detection sequence index value SFN；

AP end difference launches the orthogonal sequence code word that antenna assignment is different；

Ci=mod (nka+SFN, Ka)=mod (nka+1,4)；

Wherein, Ka is number of antennas, and Ci is index value in corresponding code word group, and nka is antenna port index Value；

The antenna port obtained is as shown in table 2 with index value in orthogonal code group:

Table 2

Antenna index	Antenna port 0	Antenna port 1	Antenna port 2	Antenna port 3
					Index in code word group	Orthogonal code 1	Orthogonal code 2	Orthogonal code 3	Orthogonal code 0

STA receives channel probe request frame, obtains detection sequence index value SFN information, according to SFN information Be calculated index value in the orthogonal code group that each antenna port is corresponding, according to Beacon frame obtain orthogonal Code word packet index value also combines index value in orthogonal code group, can be calculated the configuration of each antenna port Real orthogonal code index value, as shown in chart 3；

Table 3

Antenna index	Antenna port 0	Antenna port 1	Antenna port 2	Antenna port 3
					Codewords indexes	Orthogonal code 5	Orthogonal code 6	Orthogonal code 7	Orthogonal code 4

At the transmission time slot of channel detection frame, each antenna of AP carries out detection letter according to the orthogonal code of distribution Number transmission；

STA is receiving the channel-sounding signal receiving time slot acquisition of detectable signal, and corresponding just according to antenna Hand over code word, the channel-sounding signal received is carried out channel estimation, obtain multiple antennas between AP and STA and entirely carry Wide channel information；

Embodiment 2:

Below with 20M bandwidth, AP configures 4 antennas, 802.11n standard, frequency domain resource interval point between antenna As a example by joining, detection sequence index value SFN is 1, and the mode that multi-antenna channel of the present invention detects is described.Figure 11 Being frequency domain resource interval distribution schematic diagram according to embodiments of the present invention, wherein, pi identifies antenna index.Below In conjunction with Figure 11, the present embodiment is illustrated.

AP end sends channel probe request frame, carries detection sequence index value SFN；

AP end calculates difference and launches the frequency domain resource of antenna；

Calculate the subcarrier number that each antenna is distributed；

${\mathrm{SC}}_{\mathrm{ka}}=\frac{{\mathrm{SC}}_{\mathrm{BW}}}{\mathrm{Ka}}=\frac{52}{4}=13$

Calculate the subcarrier index value that each antenna is corresponding；

Ki=mod (k-ti+ Δ f, Ka), ti=0,1,2... are for sending symbolic number index；

Δ f=mod (SFN, SC_BW)=mod (1,52)=1；

Ki=mod (k-ti+ Δ f, Ka)=mod (k-ti+1,4), k=0:51, k are subcarrier index value；

Ki=0, distributes antenna 0；

Ki=1, distributes antenna 1；

Ki=2, distributes antenna 2；

Ki=3, distributes antenna 3；

STA receives channel probe request frame, obtains detection sequence index value SFN information, is then calculated rope Draw bias Δ f value；

At the transmission time slot of detection frame, each antenna carries out channel-sounding signal according to the sub-carrier positions of distribution Send；

STA is receiving the reception time slot of detectable signal according to the index offsets Δ f value obtained and the reception of correspondence Symbolic number, obtains the sub-carrier indices position that the channel-sounding signal of each antenna is corresponding, obtains each antenna pair The channel-sounding signal that should receive, carries out channel according to the channel-sounding signal received and estimates simultaneously at frequency Between use the mode of interpolation, obtain the channel information of multiple antennas full bandwidth between AP and STA.

By the down channel detection mode proposed in the employing embodiment of the present invention, between exploring antenna, use code division Or the mode of frequency division carries out multi-antenna channel detection simultaneously, individualized training symbol can be realized the soonest and obtain full band The channel information of wide whole day line, improves the efficiency of channel detection；Simultaneously between antenna frequency domain resource distribution or Code source distribution is associated with channel detection sequence index value, is possible not only to the diversity increasing improving frequency domain with time domain Benefit, it is also possible to reduce the impact of co-channel interference.

Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be used General calculating device realizes, and they can concentrate on single calculating device, or is distributed in multiple meter Calculating on the network that device is formed, alternatively, they can realize with calculating the executable program code of device, Perform it is thus possible to be stored in storing in device by calculating device, and in some cases, can With be different from order herein perform shown or described by step, or they are fabricated to respectively each collection Become circuit module, or the multiple modules in them or step are fabricated to single integrated circuit module realize. So, the present invention is not restricted to the combination of any specific hardware and software.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for this area Technical staff for, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, Any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.

Claims (34)

1. the determination method of a channel information, it is characterised in that including:

Sending channel probe request frame to site STA, wherein, described channel probe request frame is used for asking Send channel-sounding signal to described STA, described channel probe request frame carries for determining access The orthogonal code index value configured on each antenna of some AP and/or the system-frame of sub-carrier indices position Number SFN；

Send described channel-sounding signal frame to described STA, wherein, described channel-sounding signal frame is taken With described channel-sounding signal；

Wherein, described orthogonal code index value and/or described sub-carrier indices position, and described channel Detectable signal is for determining the channel information between described site STA and described AP.

Method the most according to claim 1, it is characterised in that send described channel detection letter to described STA Number frame includes:

After predetermined time interval after having sent described channel probe request frame, each according to described AP On individual antenna, the orthogonal code of configuration sends described channel-sounding signal frame to described STA.

Method the most according to claim 2, it is characterised in that also include:

Index value in the orthogonal code group that each antenna described is corresponding is determined according to described SFN；

Determine according to index value in described orthogonal code group and predetermined orthogonal code packet index value The orthogonal code index value corresponding with described orthogonal code.

Method the most according to claim 3, it is characterised in that determine each antenna described according to described SFN In corresponding orthogonal code group, index value includes:

Equation below is utilized to determine index value Ci in described orthogonal code group:

Ci=mod (nka+SFN, Ka), wherein, nka is each antenna index value of described AP, Ka Number for the antenna of described AP.

Method the most according to claim 1, it is characterised in that send described channel detection letter to described STA Number frame includes:

After predetermined time interval after having sent described channel probe request frame, each according to described AP On individual antenna, the index position of the subcarrier for sending described channel-sounding signal of configuration sends described Channel-sounding signal frame.

Method the most according to claim 5, it is characterised in that also include:

Determine the son load for sending described channel-sounding signal frame of configuration on each antenna of described AP Ripple number；

Index offsets Δ f is determined according to described SFN；

According to the described subcarrier number determined, described transmission corresponding with described channel-sounding signal for Δ f Symbolic number index determines the described sub-carrier indices position of configuration on each antenna of described AP.

Method the most according to claim 6, it is characterised in that

Described Δ f is obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BWFor institute State the total number of subcarrier that each antenna of AP is distributed；

Described sub-carrier indices position is obtained by equation below:

Ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, Ka is The number of the antenna of described AP, ti is described transmission symbolic number index and ti=0, and 1,2..., k are described son The span of carrier index position and described k is [0, SC_BW-1], ki is the i-th sky of corresponding distribution Line and ki=i.

Method the most according to claim 6, it is characterised in that determine and configure on each antenna of described AP Include for the subcarrier number sending described channel-sounding signal frame:

Equation below is utilized to determine the described subcarrier number of configuration on each antenna described:

Wherein, Ka is the number of the antenna of described AP, SC_BWEach for described AP The total number of subcarrier that individual antenna is distributed.

9. the determination method of a channel information, it is characterised in that including:

Receiving the channel probe request frame that access point AP sends, wherein, described channel probe request frame is used Sent channel-sounding signal in request by described AP, described channel probe request frame carries system-frame Number SFN；

Receive the channel-sounding signal frame that described AP sends, wherein, described channel-sounding signal frame is taken With described channel-sounding signal；

Orthogonal code index value and/or the son of configuration on each antenna of described AP is determined according to described SFN Carrier index position；

According to described orthogonal code index value and/or described sub-carrier indices position, and described channel is visited Survey signal and determine the channel information between site STA and described AP.

Method the most according to claim 9, it is characterised in that receive the described channel spy that described AP sends Survey signal frame includes:

After receiving described AP predetermined time interval after having sent described channel probe request frame, according to The described channel-sounding signal frame that on each antenna of described AP, the orthogonal code of configuration sends.

11. methods according to claim 9, it is characterised in that determine that described AP's is each according to described SFN On individual antenna port, the described orthogonal code index value of configuration includes:

Index value in the orthogonal code group that each antenna described is corresponding is determined according to described SFN；

According to index value in described orthogonal code group and the described AP sent by described AP that receives in advance The orthogonal code packet index value of channel detection determine described orthogonal code index value.

12. methods according to claim 11, it is characterised in that determine each sky described according to described SFN In the described orthogonal code group that line is corresponding, index value includes:

Equation below is utilized to determine index value Ci in described orthogonal code group:

Ci=mod (nka+SFN, Ka), wherein, nka is each antenna index value of described AP, Ka Number for the antenna of described AP.

13. methods according to claim 9, it is characterised in that receive the described channel spy that described AP sends Survey signal frame includes:

After receiving described AP predetermined time interval after having sent described channel probe request frame, according to The index bit of the subcarrier for sending described channel-sounding signal of configuration on each antenna of described AP Put the described channel-sounding signal frame of transmission.

14. methods according to claim 13, it is characterised in that determine described AP's according to described SFN On each antenna, the sub-carrier indices position of configuration includes:

Determine the son load for sending described channel-sounding signal frame of configuration on each antenna of described AP Ripple number；

Index offsets Δ f is determined according to described SFN；

The described channel detection letter sent according to the described subcarrier number determined, described Δ f and described AP Number corresponding transmission symbolic number index determines the described sub-carrier indices of configuration on each antenna of described AP Position.

15. methods according to claim 14, it is characterised in that

Described Δ f is obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BWFor institute State the total number of subcarrier that each antenna of AP is distributed；

Described sub-carrier indices position is obtained by equation below:

Ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, ti is institute Stating transmission symbolic number index and ti=0,1,2..., k are described sub-carrier indices position and the value of described k Scope is [0, SC_BW-1], ki is i-th antenna and the ki=i of corresponding distribution.

16. methods according to claim 14, it is characterised in that determine and join on each antenna of described AP That puts includes for sending the subcarrier number of described channel-sounding signal frame:

Equation below is utilized to determine the described subcarrier number of configuration on each antenna described:

Wherein, Ka is the number of the antenna of described AP, SC_BWEach for described AP The total number of subcarrier that individual antenna is distributed.

17. methods according to claim 9, it is characterised in that according to described sub-carrier indices position, and Described channel-sounding signal determines that the channel information between site STA and described AP includes:

The channel detection letter of each antenna according to the described AP received on described sub-carrier indices position Number the channel information between described STA and described AP is estimated；

Determine by the way of the result of described estimation is carried out interpolation processing described STA and described AP it Between channel information.

The determination device of 18. 1 kinds of channel informations, it is characterised in that including:

First sending module, for sending channel probe request frame, wherein, described channel to site STA Probe request sends channel-sounding signal for request to described STA, in described channel probe request frame The orthogonal code index value and/or the son that carry configuration on each antenna for determine access point AP carry The system frame number SFN of ripple index position；

Second sending module, for sending described channel-sounding signal frame to described STA, wherein, described Channel-sounding signal frame carries described channel-sounding signal；

Wherein, described orthogonal code index value and/or described sub-carrier indices position, and described channel Detectable signal is for determining the channel information between described site STA and described AP.

19. devices according to claim 18, it is characterised in that described second sending module includes:

After predetermined time interval after having sent described channel probe request frame, each according to described AP On individual antenna, the orthogonal code of configuration sends described channel-sounding signal frame to described STA.

20. devices according to claim 19, it is characterised in that also include:

First determines module, for determining, according to described SFN, the orthogonal code group that each antenna described is corresponding Interior index value；

Second determines module, for according to index value and predetermined orthogonal code in described orthogonal code group Word packet index value determines the orthogonal code index value corresponding with described orthogonal code.

21. devices according to claim 20, it is characterised in that described first determines that module includes:

Equation below is utilized to determine index value Ci in described orthogonal code group:

Ci=mod (nka+SFN, Ka), wherein, nka is each antenna index value of described AP, Ka Number for the antenna of described AP.

22. devices according to claim 18, it is characterised in that described second sending module includes:

After predetermined time interval after having sent described channel probe request frame, each according to described AP The institute that on individual antenna, the index position of the subcarrier for sending described channel-sounding signal of configuration sends State channel-sounding signal frame.

23. devices according to claim 22, it is characterised in that also include:

3rd determines module, for determine on each antenna of described AP configuration for sending described letter The subcarrier number of road detectable signal frame；

4th determines module, for determining index offsets Δ f according to described SFN；

5th determines module, for according to the described subcarrier number determined, described Δ f and described channel The transmission symbolic number index that detectable signal is corresponding determines the described sub-load of configuration on each antenna of described AP Ripple index position.

24. devices according to claim 23, it is characterised in that

Described Δ f is obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BWFor institute State the total number of subcarrier that each antenna of AP is distributed；

Described sub-carrier indices position is obtained by equation below:

Ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, Ka is The number of the antenna of described AP, ti is described transmission symbolic number index and ti=0, and 1,2..., k are described son The span of carrier index position and described k is [0, SC_BW-1], ki is the i-th sky of corresponding distribution Line and ki=i.

25. devices according to claim 23, it is characterised in that the described 3rd determines that module includes:

Equation below is utilized to determine the described subcarrier number of configuration on each antenna described:

Wherein, Ka is the number of the antenna of described AP, SC_BWEach for described AP The total number of subcarrier that individual antenna is distributed.

The determination device of 26. 1 kinds of channel informations, it is characterised in that including:

First receiver module, for receiving the channel probe request frame that access point AP sends, wherein, institute Stating channel probe request frame and sent channel-sounding signal for request by described AP, described channel detection please Ask and frame carries system frame number SFN；

Second receiver module, for receiving the channel-sounding signal frame that described AP sends, wherein, described Channel-sounding signal frame carries described channel-sounding signal；

6th determines module, for determining that on each antenna of described AP, configuration is just according to described SFN Hand over codewords indexes value and/or sub-carrier indices position；

7th determines module, for according to described orthogonal code index value and/or described sub-carrier indices position Put, and described channel-sounding signal determines the channel information between site STA and described AP.

27. devices according to claim 26, it is characterised in that described second receiver module includes:

After receiving described AP predetermined time interval after having sent described channel probe request frame, according to The described channel-sounding signal frame sent for the orthogonal code of configuration on each antenna of described AP.

28. devices according to claim 27, it is characterised in that when determining described AP according to described SFN Each antenna port on configuration described orthogonal code index value time, the described 6th determines that module includes:

First determines unit, for determining, according to described SFN, the orthogonal code group that each antenna described is corresponding Interior index value；

Second determines unit, for according to index value in described orthogonal code group and receive in advance by described The orthogonal code packet index value of the channel detection of the described AP that AP sends determines that described orthogonal code indexes Value.

29. devices according to claim 28, it is characterised in that described first determines that unit includes:

Equation below is utilized to determine index value Ci in described orthogonal code group:

Ci=mod (nka+SFN, Ka), wherein, nka is each antenna index value of described AP, Ka Number for the antenna of described AP.

30. devices according to claim 26, it is characterised in that described second receiver module includes:

After receiving described AP predetermined time interval after having sent described channel probe request frame, according to The index bit of the subcarrier for sending described channel-sounding signal of configuration on each antenna of described AP Put the described channel-sounding signal frame of transmission.

31. devices according to claim 30, it is characterised in that when determining described AP according to described SFN Each antenna on configuration sub-carrier indices position time, the described 6th determines that module includes:

3rd determines unit, for determine on each antenna of described AP configuration for sending described letter The subcarrier number of road detectable signal frame；

4th determines unit, for determining index offsets Δ f according to described SFN；

5th determines unit, for sending out according to the described subcarrier number determined, described Δ f and described AP The transmission symbolic number index that the described channel-sounding signal that send is corresponding determines joins on each antenna of described AP The described sub-carrier indices position put.

32. devices according to claim 31, it is characterised in that

Described Δ f is obtained by equation below: Δ f=mod (SFN, SC_BW), wherein, SC_BWFor institute State the total number of subcarrier that each antenna of AP is distributed；

Described sub-carrier indices position is obtained by equation below:

Ki=mod (k-ti+ Δ f, Ka) or ki=mod (k+ti+ Δ f, Ka), wherein, ti is institute Stating transmission symbolic number index and ti=0,1,2..., k are described sub-carrier indices position and the value of described k Scope is [0, SC_BW-1], ki is i-th antenna and the ki=i of corresponding distribution.

33. devices according to claim 31, it is characterised in that the described 3rd determines that unit includes:

Equation below is utilized to determine the described subcarrier number of configuration on each antenna described:

Wherein, Ka is the number of the antenna of described AP, SC_BWEach for described AP The total number of subcarrier that individual antenna is distributed.

34. devices according to claim 26, it is characterised in that when according to described sub-carrier indices position, And described channel-sounding signal is when determining the channel information between site STA and described AP, described Seven determine that module includes:

Estimation unit, for each sky according to the described AP received on described sub-carrier indices position Channel information between described STA and described AP is estimated by the channel-sounding signal of line；

6th determines unit, for determining institute by the way of the result of described estimation is carried out interpolation processing State the channel information between STA and described AP.