CN103209014B - Radio frequency transfer approach and RF transport systems thereof - Google Patents
Radio frequency transfer approach and RF transport systems thereof Download PDFInfo
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- CN103209014B CN103209014B CN201210015258.XA CN201210015258A CN103209014B CN 103209014 B CN103209014 B CN 103209014B CN 201210015258 A CN201210015258 A CN 201210015258A CN 103209014 B CN103209014 B CN 103209014B
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Abstract
A kind of radio frequency transfer approach and RF transport systems thereof.Here, be corresponding to the transmission quality sending the multiple transmission paths of detection of each data symbol stream, decide whether to utilize space block coding module to transmit diversity block coding techniques via multiple transmission paths to send data symbol stream.Wherein, when detecting that at least one sends the transmission quality in path more than or equal to preset value, cause pre-processing module conductance to pass to send in path, and send next data symbol stream via the single individual path that sends of conducting.Otherwise, then cause pre-processing module conductance to pass to a space block coding module, and utilize space block coding module to transmit diversity block coding techniques via corresponding transmission path to send data symbol stream.
Description
Technical field
The present invention relates to a kind of wireless telecommunications transfer approach and system thereof, particularly a kind of radio frequency transfer approach and RF transport systems thereof.
Background technology
In order to meet the demand for WiMAX Yu high speed data transfer, the developing direction important by becoming wireless communication technique of the most effectively utilizing space resources.
Based on orthogonal frequency division multi-task technology (Multiple-InputMultiple-Output；MIMO) wireless telecommunication system possesses plurality of advantages, and the wireless telecommunication system of a new generation uses orthogonal frequency division multi-task technology, such as mostly: WLAN (IEEE802.11a/g/nWirelessLocalAreaNetwork；WLAN), wireless MAN (IEEE802.16WorldwideInteroperabilityforMicrowaveAccess；WiMAX), digital audio-video broadcast system (DigitalVideoBroadcastingsystemforTerrestrial/Handheld；DVB-T/H), radio ultra wide band system (UltraWideBandsystem；UWB), 3GPP next generation evolution standard (3rdGenerationPartnerProjectforLong-TermEvolution；3GPP-LTE) etc..
And block coding (SpaceTimeBlockCode time empty；STBC) being a kind of transmission diversity block coding, it can be with framework at multiple-input and multiple-output (Multiple-InputMultiple-Output；MIMO) on communication system, and it is typically used on multi-input multi-output orthogonal frequency division multi-task (MIMO-OFDM) communication system.Owing to block coding techniques needs to transmit each signal by multiple transmission paths during sky, the power consumption of whole wireless telecommunication system relatively can be increased.
Therefore, how to take into account biography to produce effects and can be even more important for the mobile communication equipment of limited power with system power consumption.
Summary of the invention
In an embodiment of the present invention, a kind of radio frequency transfer approach, including: utilize a pre-processing module that one transmission data are processed into multiple data symbol stream；Use multiple transmission path data symbol stream a little to person to transmit, and determine to send the transmission quality in path；And decide whether to utilize space block coding module to transmit diversity block coding techniques via multiple transmission paths to send each data symbol stream according to the transmission quality sending path.
In certain embodiments, when detecting that at least one sends the transmission quality in path more than or equal to preset value, control handover module conducting pre-processing module to sent in path, and send next data symbol stream via one of them transmission path of conducting；And when detecting that the transmission quality sending path is respectively less than preset value, control handover module conducting pre-processing module, to space block coding module, utilizes space block coding module to transmit diversity block coding techniques via all of transmission path to send data symbol stream.
In certain embodiments, the method for the transmission quality detecting multiple transmission path can be corresponding to the transmission of each data symbol stream.
In certain embodiments, space block coding module can have multi-tiling pattern, the transmission path of the most corresponding varying number of these block code patterns.Wherein, the corresponding all of transmission path of maximum block code pattern, and the block code pattern correspondence at least two of minimum sends path.
Therefore, when detecting that the transmission quality sending path uses maximum block code pattern less than preset value and space block coding module present mode, maintain and use maximum block code pattern to send next data symbol stream to transmit diversity block coding techniques by all of transmission path.
When transmission quality transmission path being detected is respectively less than preset value and space block coding module present mode not yet uses maximum block code pattern, switch to the block code pattern using big one-level to transmit the diversity block coding techniques transmission firm data symbol stream sent in transmission path by respective amount.
When detecting that at least one sends the block code pattern beyond the block code pattern that the transmission quality in path is minimum more than or equal to preset value and the employing of space block coding module present mode, the block code pattern using little one-level is switched to send next data symbol stream to transmit diversity block coding techniques by the transmission path of respective amount.
When detecting that at least one sends the block code pattern that the transmission quality in path is more than or equal to preset value and space block coding module present mode employing minimum, switch to and send next data symbol stream by single the transmission path sending in path.
When the transmission quality at least one transmission path being detected does not utilizes this space block coding module to send signal more than or equal to preset value and RF transport systems, maintain and send, with single transmission path, the data symbol stream or next data symbol stream just sent with not utilizing this space block coding module.
In an embodiment of the present invention, a kind of RF transport systems includes a pre-processing module, multiple transmission path, a space block coding module, a handover module and a detector unit.
Space block coding module is electrically connected to send path.Handover module is then connected electrically in pre-processing module and and sends between path and be connected electrically between pre-processing module and space block coding module.
When RF transport systems carries out signal transmission, pre-processing module can be processed into multiple data symbol stream by transmitting data, and detector unit can detect and send the transmission quality in path and according to the running transmitting quality control handover module sending path.Handover module then decides whether to utilize a space block coding module to send respectively this data symbol stream to transmit diversity block coding techniques via multiple transmission paths according to the transmission quality sending path.
In certain embodiments, when detector unit detects that at least one sends the transmission quality in path more than or equal to preset value, detector unit controls handover module and pre-processing module conductance passes to one sends path, to transmit diversity technique via the transmission path turned on pre-processing module to send data symbol stream.
Otherwise, when the transmission quality that detector unit detects transmission path is respectively less than preset value, detector unit controls handover module and pre-processing module conductance is passed to space block coding module, to utilize space block coding module to transmit diversity block coding techniques via sending path to send data symbol stream.
In certain embodiments, space block coding module has multi-tiling pattern, and the transmission path of the most corresponding varying number of these a little block code patterns.Wherein, the corresponding all of transmission path of maximum block code pattern, and block code pattern correspondence at least a part of which two the transmission path of minimum.
At this, when the transmission quality that detector unit detects at least one transmission path does not currently utilize space block coding module more than or equal to preset value and RF transport systems, detector unit control handover module maintenance pre-processing module conducts, so that sending next data symbol stream via single transmission path with not utilizing space block coding module with single transmission path.
When detector unit detects that at least one sends a kind of block code pattern transmission signal that the transmission quality in path is more than or equal to preset value and RF transport systems currently employed space block coding module, detector unit controls the annexation of the output stage of handover module switching pre-processing module, send in path to cause pre-processing module conductance to pass to or conductance passes to the transmission path than the quantity sending the little one-level in path corresponding to currently employed block code pattern, and make next data symbol stream not utilize space block coding module ground or utilize the space block coding module of block code pattern of little one-level to send via the transmission path of the quantity of little one-level.
When detector unit detects that sending the transmission quality in path is respectively less than preset value and space block coding module the most for the block code pattern of maximum, detector unit controls the annexation of the output stage of handover module switching pre-processing module, so that pre-processing module conductance passes to the transmission path than the quantity sending path big one-level corresponding to currently employed block code pattern, and next data symbol stream is made to utilize the space block coding module of block code pattern of big one-level to send via the transmission path of the quantity of big one-level.
When detector unit detects that sending the transmission quality in path is respectively less than preset value and space block coding module currently for the block code pattern of maximum, handover module maintenance pre-processing module conducts, so that the space block coding module that next data symbol stream utilizes maximum block code pattern sends via all of transmission path with all transmission paths.
In sum, radio frequency transfer approach according to the present invention and RF transport systems thereof are when carrying out signal and sending, the quantity sending path in order to send signal can be selected according to the transmission penetration quality dynamic in currently transmitted path, and can dynamically choose whether open space block coded treatment and open the pattern of space block coded treatment, with take into account biography produce effects can and system power consumption.
Accompanying drawing explanation
Fig. 1 is the flow chart of the radio frequency transfer approach of the switching at runtime block coding according to one embodiment of the invention.
Fig. 2 is the schematic block diagram of the RF transport systems of the switching at runtime block coding according to one embodiment of the invention.
Fig. 3 is the schematic block diagram sending path of an embodiment.
Fig. 4 is the schematic block diagram of the RX path of an embodiment.
Fig. 5 is that the thin consolidation of an embodiment sends path and the schematic block diagram of RX path.
Fig. 6 is the schematic diagram of the transmitting portion of the RF transport systems of another embodiment.
Fig. 7 A and Fig. 7 B is the flow chart of the radio frequency transfer approach of the switching at runtime block coding according to another embodiment of the present invention.
Fig. 8 is the schematic diagram of the transmitting portion of the RF transport systems of another embodiment.
Fig. 9 is the schematic diagram of the transmitting portion of the RF transport systems of another embodiment.
Symbol description
10 main frame connection interface 20 RF transport systems
210 pre-processing module 220 handover modules
230 block coding module 230-1 space, space block coding modules
230-2 space block coding module 240 path selection module
242 select unit 250 to send path
250-1 sends path 250-2 and sends path
250-3 sends path 250-4 and sends path
252 speed inverse fourier transform (IFFT) modules
254 digital analog converters (DAC) 256 radio-frequency (RF) transmitter
258 antenna 260 detector units
270 space block decoding module 280 channel estimation devices
290 RX paths
292 fast fourier transform (FFT) module
294 analog-digital converters (ADC) 296 radio frequency receiver
298 antenna 300 antennas
310 RF transceiver Tx_md control signals
En enables signal No1 the first outfan
No2 the second outfan No3 the 3rd outfan
No4 the 4th outfan
Detailed description of the invention
Fig. 1 is the flow chart of the radio frequency transfer approach according to one embodiment of the invention, and the schematic block diagram that Fig. 2 is the RF transport systems according to one embodiment of the invention.
Refer to Fig. 2, radio-frequency device has main frame connection interface 10 and RF transport systems 20.
Radio-frequency device by main frame connection interface 10 and host apparatus electrical ties, and via main frame connection interface 10 Receiving Host device wireless transmission to be carried out transmission data or by wireless receiving to reception data send host apparatus to.
Wherein, radio-frequency device can be built-in device or the equipment of external connection of host apparatus.Host apparatus can be various main frame or various portable communications equipment.
RF transport systems 20 includes pre-processing module 210, handover module 220, space block coding module 230, multiple transmission path 250-1,250-2, detector unit 260 and at least one RX path 290.
Merging with reference to Fig. 1, pre-processing module 210 carries out signal conversion according to use wireless communication standard and frequency range.When transmitting, pre-processing module 210 receives from the transmission data of main frame connection interface 10 and is processed into multiple data symbol stream (step S31).And when receiving, the multiple data symbol stream received then are processed into reception data and export to main frame connection interface 10 by pre-processing module 210.
In certain embodiments, the transmitting portion of pre-processing module 210 can include encoding (encoding) module, shrink process (puncturing) module, multitask module, staggered (interleaving) module and reflection (mapping) module.
Main frame connection interface 10, coding module, shrink process module, multitask module, deinterleaving block, image module coding module and handover module 220 order electrical connection.Transmission data are converted into coded data according to one or more wireless communication standards by coding module.Shrink process module carries out shrink process to produce puncturing code data to coded data.Puncturing code data are interlocked for multiple intercrossed data streams by deinterleaving block.The plurality of intercrossed data stream is mapping to multiple data symbol stream and exports to handover module 220 by image module.Wherein, each data symbol in each data symbol stream includes one or more complex signal.
Relatively, the receiving portion of pre-processing module 210 then can include decoding (decoding) module, shrink process (de-puncturing) module, multitask module, release of an interleave (de-interleaving) module and de-mapping (de-mapping) module.
Main frame connection interface 10, decoding module, shrink process module, multitask module, de-interlacing module, de-mapping module and detector unit 260 are sequentially connected electrically.Relative to passing receiving portions, the assembly meeting reverse process of receiving portion is to be processed into reception data by the multiple data symbol stream received from detector unit 260 and to export to main frame connection interface 10.
Detector unit 260 can send the transmission quality in path by RX path 290 detection, and produces corresponding control signal Tx_md (step S33), to control the switching of handover module 220 according to the transmission quality sending path.In certain embodiments, detector unit 260 is electrically connected to a storage element 202.Storage element 202 stores a pre-set preset value.Detector unit 260 reads this preset value, the transmission quality (step S34) compared with preset value sending path 250-1,250-2 that will detect, and produces control signal Tx_md according to comparative result.
Handover module 220, according to control signal Tx_md, pre-processing module 210 conductance passes to space block coding module 230 or conductance passes to send path 250-1.
In certain embodiments, radio-frequency device first can send first data symbol stream (step S32) in these data symbol stream with send path 250-1,250-2 of maximum quantity, then is detected the transmission quality (step S33) of transmission path 250-1,250-2 to control the running of handover module 220 by detector unit 260.In other words, initially, handover module 220 turns on pre-processing module 210 and space block coding module 230, in order to send first data symbol stream to transmit diversity block coding techniques via multiple transmission path 250-1,250-2 by space block coding module 230.
Certainly, in certain embodiments, radio-frequency device may also be first data symbol stream (step S32) first sending in these data symbol stream with the transmission path 250-1 (i.e. using single transmission path 250-1) of minimum number, then is detected the transmission quality (step S33) of transmission path 250-1,250-2 to control the running of handover module 220 by detector unit 260.In other words, initially, handover module 220 turns on pre-processing module 210 and and sends path 250-1, in order to only send first data symbol stream through thus sending path 250-1 by sending path 250-1 to transmit diversity technique.
When detector unit 260 detects that these transmission quality sending the transmission path in path 250-1,250-2 are more than or equal to preset value (step S34), handover module 220 is according to control signal Tx_md conducting pre-processing module 210 and transmission path 250-1, in order to use single transmission path 250-1 (with the transmission path of pre-processing module 210 conducting) to send data symbol stream (step S35).
When the transmission quality that detector unit 260 detects transmission path 250-1,250-2 is respectively less than preset value (step S34), handover module 220 is according to control signal Tx_md conducting pre-processing module 210 and space block coding module 230 (step S36 and step S37), in order to send data symbol stream (step S36 and step S38) to transmit diversity block coding techniques via multiple transmission path 250-1,250-2 by space block coding module 230.
The data symbol stream received can be carried out space block coding and encode signal to produce multiple spaces block by space block coding module 230, and these space blocks coding signals are separately input into transmission path 250-1,250-2.Send path 250-1/250-2 via each again to be sent by the space block coding signal received.Here, the number of space block coding signal corresponds to send the number of path 250-1,250-2 produced by space block coding module 230.
When transmitting terminal is to transmit diversity block coding techniques transmission signal, on the receive side, the assembly (generally identical with the structure shown in Fig. 2) of receiving portion also includes space block decoding module 270.A space block decoding module 270 it is respectively connected with between each RX path 290 and detector unit 260.Signal received by corresponding RX path 290 is carried out space block coding to produce data symbol stream by space block decoding module 270.
Further, each space block decoding module 270 can turn on space block decoding module 270 and detector unit 260 by the enable signal en of the transmission mode of corresponding transmission end.In other words, when transmission end is in time directly sending signal (signal of transmission does not carries out space block coding) with transmission diversity technique by single transmission path 250-1, the enable signal en of receiving terminal causes single RX path 290 to conduct with detector unit 260, is directly sent to pre-processing module 210 by detector unit 260 so that the signal causing RX path 290 to receive decodes not via space block decoding module 270.And when transmission end sends signal with transmission diversity block coding techniques by sending path 250-1,250-2 from space block coding module 230, the enable signal en of receiving terminal causes RX path 290 to conduct with space block decoding module 270, is sent to pre-processing module 210 by detector unit 26 with the signal causing RX path 290 to receive again after space block decoding module 270 decodes.
Wherein, detector unit 260 can detect each transmission quality (step S33) sending path corresponding to the transmission of each data symbol stream, the number sending path used during to determine and to send next time.For example, detector unit 260 can be by receiving signal during the corresponding reception sending each data symbol stream, such as: ACK (ACKnowledgeCharacter) signal, and the anti-signal transmission quality pushing away transmission path.
And, when handover module 220 switches to turn on pre-processing module 210 to space block coding module 230 (step S37) according to control signal Tx_md from conducting pre-processing module 210 to transmission path 250-1, can first resend the data symbol stream (step S38) being just transmitted across after handover, in the transmission (step S39) carrying out subsequent data symbols stream that continues.In other words, after handover module 220 is switched to send path 250-1,250-2 (step S37) by single transmission path 250-1 more, utilize space block coding module 230 to transmit diversity block coding techniques via sending the data symbol stream (step S38) that path 250-1,250-2 transmission has just been transmitted across.
In the detection of the transmission quality in transmission path, detector unit 260 can send the signal intensity receiving signal corresponding to path 250-1,250-2 by detection, transmission path 250-1,250-2 the are corresponding channel frequency response of RX path or the transfer rate of transmission path 250-1,250-2 learn the transmission quality sending path.
Send the channel frequency response of RX path corresponding to path 250-1,250-2 with detection for, between each RX path 290 and detector unit 260, it is respectively connected with a channel estimation device 280.
When receiving the signal of receiving terminal in transmission end, channel estimator 280 respectively sends path 250-1,250-2 channel parameters (h to receiving terminal by the signal estimation received at each subcarrier (Tone)n(k)).N represents the transmission path estimated, and k represents the subcarrier carrying out estimating.
It is then detected that unit 260 utilizes door threshold value (Tp) calculate each transmission quality (N sending path with each channel parameter sending pathn).Here, detector unit 260 can calculate according to following equation.
Wherein, K represents this radio-frequency device (wireless communication system) in order to send the sum of the subcarrier of signal.
Then, each transmission quality (N sending path that detector unit 260 will calculate againn) compared with preset value, and export control signal Tx_md according to comparative result.
Here, block coding (STBC) device, null tone block coding (SFBC) device or empty time-frequency block coding (STFBC) device when space block coding module 230 can be empty.Relatively, block decoder or null tone block decoder when space block decoding module 270 can be then sky corresponding to space block coding module 230.
Time empty, block coder carries out block coding during data symbol stream empty.And null tone block coder carries out the null tone block coding of data symbol stream.Empty time-frequency block coder then carries out the empty time-frequency block coding of data symbol stream.
3rd figure is the schematic block diagram sending path of an embodiment.
In certain embodiments, with reference to Fig. 3, each path 250 that sends includes fast Flourier inverse transformation (InverseFastFourierTransform；IFFT) module 252, digital analog converter (DigitaltoAnalogConverter；DAC) 254, radio-frequency (RF) transmitter 256 and antenna 258.
Fast Flourier inverse transform module 252, digital analog converter 254, radio-frequency (RF) transmitter 256 and antenna 258 are electrically connected successively.
The data symbol stream of IFFT module 252 in the future adaptive switched module 220 or the space block coding signal from space block coding module 230 are converted into transmission symbol stream.
Digital analog converter 254 transfers transmission symbol stream to analogue signal from digital signal, and is supplied to radio-frequency (RF) transmitter 256.Radiofrequency signal is changed into again by radio-frequency (RF) transmitter 256.Finally, radiofrequency signal is sent by the antenna 258 connected by radio-frequency (RF) transmitter 256, to be sent to the receiving terminal of correspondence.
Fig. 4 is the schematic block diagram of the RX path of an embodiment.
In certain embodiments, with reference to Fig. 3, each RX path 290 includes fast fourier transform (FastFourierTransform；FFT) module 292, analog-digital converter (AnalogtoDigitalConverter；ADC) 294, radio frequency receiver 296 and antenna 298.
Fast Fourier Transform Block 292, analog-digital converter 294, radio frequency receiver 296 and antenna 298 are electrically connected successively.
When radio-frequency device in a receive mode time, radio-frequency (RF) transmitter 256 by antenna receive one or more radiofrequency signal and be converted into reception symbol stream.
Analog-digital converter 294 transfers reception symbol stream to digital signal from analogue signal, and is supplied to Fast Fourier Transform Block 292.
The circulation of reception symbol is changed into space block coding signal or data symbol stream by Fast Fourier Transform Block 292 again.Signal after Fast Fourier Transform Block 292 conversion can be supplied to space block decoding module 270 according to the selection enabling signal en or be supplied to pre-processing module 210 via detector unit 260.
Fig. 5 is that the thin consolidation of an embodiment sends path and the schematic block diagram of RX path.
Furthermore, with reference to Fig. 5, antenna 300 can be shared with a RX path 290 in each path 250 that sends.
Further, the radio-frequency (RF) transmitter sending path 250 can be integrated into a RF transceiver 310 with the radio frequency receiver of a RX path 290, as shown in Figure 5.
In certain embodiments, turning back to reference to Fig. 2, a path selection module 240 can be provided with in the prime sending path 250-1,250-2.
Path selection module 240 is arranged on handover module 220 and sends between path 250-1,250-2 and between space block coding module 230 and transmission path 250-1,250-2.Path selection module 240 is electrically connected to handover module 220, space block coding module 230 and sends path 250-1,250-2.
Further, path selection module 240 is also electrically connected to detector unit 260, and receives control signal Tx_md from detector unit 260.
Path selection module 240 carries out the selection in path according to control signal Tx_md, to turn in handover module 220 and transmission path 250-1,250-2 or guiding path selection module 240 and each transmission path 250-1,250-2.
That is, when detector unit 260 detects that these send path 250-1, when the transmission quality in a transmission path in 250-2 is more than or equal to preset value, handover module 220 is according to control signal Tx_md conducting pre-processing module 210 and path selection module 240, path selection module 240 is also according to control signal Tx_md conducting handover module 220 and transmission path 250-1 simultaneously, transmission quality in 250-2 is more than or equal to a transmission path of preset value, thus make pre-processing module 210 and transmission quality conduct more than or equal to a transmission path of preset value, to use single transmission path 250-1 (with the transmission path of pre-processing module 210 conducting) to send data symbol stream.
When the transmission quality that detector unit 260 detects transmission path 250-1,250-2 is respectively less than preset value, handover module 220 is according to control signal Tx_md conducting pre-processing module 210 and space block coding module 230, path selection module 240 is also according to control signal Tx_md conducting space block coding module 230 and corresponding transmission path 250-1,250-2 simultaneously, in order to send data symbol stream with transmission diversity block coding techniques via multiple transmission path 250-1,250-2 by space block coding module 230.
In certain embodiments, refer to Fig. 2, rear class at RX path 290 is also equipped with a path selection module (242), and whether path selection module is in order to select signal received by RX path 290 to process through the space block decoding of space block decoding module 270.
Path selection module can include multiple selection unit 242.Each RX path 290 is correspondingly arranged on a selection unit 242.
The input selecting unit 242 connects corresponding RX path 290 and corresponding space block decoding module 270, selects the outfan of unit 242 then to connect detector unit 260.
When transmission end is in time directly sending signal (signal of transmission does not carries out space block coding) with transmission diversity technique by single transmission path 250-1, the enable signal en of receiving terminal causes RX path 290 and the detector unit 260 selecting unit 242 to turn on correspondence, is directly sent to pre-processing module 210 by detector unit 260 so that the signal causing RX path 290 to receive decodes not via space block decoding module 270.
And when transmission end from space block coding module 230 to transmit diversity block coding techniques and send signal (signal of transmission have carry out space block coding) by sending path 250-1,250-2 time, the enable signal en of receiving terminal causes selection unit 242 to turn on space block decoding module 270 and detector unit 260, is sent to pre-processing module 210 by detector unit 260 with the signal causing RX path 290 to receive again after space block decoding module 270 decodes.
Although being to draw out handover module 220 in the case of using single transmission path to send signal not to be individually present with space block coding module 230 with a bang path sending path in fig. 2, but the restriction of this non-invention, in the case of using single transmission path to send signal, handover module 220 and a bang path sending path also can share channel, as shown in Figure 6 with space block coding module 230.
Fig. 6 is the schematic diagram of the transmitting portion of the RF transport systems of another embodiment.
In other words, in certain embodiments, with reference to Fig. 6, aforesaid handover module 220 substantially can be built in space block coding module 230, and built-in handover module is in order to switch the running of space block coding module 230.
nullPlease merge with reference to Fig. 1，When detector unit 260 detects that these send path 250-1、When the transmission quality in a transmission path in 250-2 is more than or equal to preset value (step S34)，Control signal Tx_md does not enable the space block coded treatment of space block coding module 230，Path selection module 240 is also according to the first outfan No1 and transmission path 250-1 of control signal Tx_md conducting space block coding module 230 simultaneously、A transmission path in 250-2，Thus make space block coding module 230 not carry out space block coded treatment and directly export the data symbol stream from pre-processing module 210 from the first outfan No1，To use single transmission path (with the transmission path of the first outfan No1 conducting) to send data symbol stream (step S35).
nullWhen detector unit 260 detects transmission path 250-1、When the transmission quality of 250-2 is respectively less than preset value (step S34)，Control signal Tx_md enables the space block coded treatment of space block coding module 230，Path selection module 240 is according to control signal Tx_md conducting space block coding module 230 and corresponding transmission path 250-1 simultaneously、250-2 (step S36 and step S37)，Thus make space block coding module 230 carry out the space block coded treatment of data symbol stream and respectively from each outfan (No1、No2) signal after output processes，Will pass through space block coding module 230 to transmit diversity block coding techniques via multiple transmission path 250-1、250-2 sends data symbol stream (step S36 and step S38).
Fig. 7 A and Fig. 7 B is the flow chart of the radio frequency transfer approach of the switching at runtime block coding according to another embodiment of the present invention, and the schematic diagram of the transmitting portion of the RF transport systems that Fig. 8 is another embodiment.Wherein, step S44 in Fig. 7 A is connected to step S39 that step S55 in step S50 in Fig. 7 B, and Fig. 7 B, step S57 and step S58 are connected in Fig. 7 A.
In certain embodiments, with reference to Fig. 8, radio-frequency device (RF transport systems 20) can have the transmission path more than 2, and space block coding module 230 can have multiple different grades of block code pattern.
The transmission path of these block code patterns varying number sent in path that corresponding radio-frequency device is had respectively.Wherein, the corresponding all of transmission path of maximum block code pattern, and the block code pattern correspondence at least two of minimum sends path.
In other words, space block coding module 230 can have multiple 1 pair of m block code pattern, and m is the integer more than or equal to 2 and less than or equal to y.The sum sending path that y is had by radio-frequency device.Further, each 1 pair of m block code pattern correspondence m sends path.Here, y is more than 2 integers.
Please merge with reference to Fig. 7 A, after transmission data are processed into multiple data symbol stream (step S41) by pre-processing module 210, more sequentially send each data symbol stream (step S42) by one or more transmission paths.Further, after each data symbol stream sends, utilize detector unit 260 detection to send the transmission quality (step S43) in path, and determine to carry out the quantity (step S44) sending path of signal transmission according to testing result.
And when switching (step S44) of the quantity that detector unit 260 judgement need to be transmitted path, change the quantity sending path the most in a stepwise fashion.
When detector unit 260 detects that the transmission quality sending path uses block code pattern (i.e. 1 pair y block code pattern) (step S45) of maximum less than preset value (step S44) and RF transport systems 20, maintain and use maximum block code pattern to send next data symbol stream (step S46) to transmit diversity block coding techniques by y corresponding transmission path.
That is, after data symbol stream sends, path selection module 240 maintains space block coding module 230 to send conducting of path with y, and the space block coding module 230 by next data symbol stream input to the block code pattern performing maximum that continues, and sent by y corresponding transmission path after space block coding module 230 carries out 1 pair of y space block coding to the data symbol stream of input.
When detector unit 260 detects that the transmission quality sending path not yet uses block code pattern (step S45) of maximum less than preset value (step S44) and RF transport systems, switch to, according to control signal Tx_md, the block code pattern (step S47) using big one-level, and use the block code pattern of big one-level to send, by the path that sends of respective amount, the data symbol stream (step S48) just sent to transmit diversity block coding techniques.In other words, when detector unit 260 judges to upgrade the quantity sending path, after upgrading, then can the most again send the data symbol stream being just transmitted across, then the transmission of the next data symbol stream that continues.
That is, when detector unit 260 judges to upgrade the quantity sending path, from performing 1, the space block coding module 230 of i block code pattern is switched to the execution 1 space block coding module 230 to i+d block code pattern according to control signal Tx_md, path selection module 240 switches to turn on space block coding module 230 from conducting space block coding module 230 with i transmission path according to control signal Tx_md and sends path with j simultaneously, then cause the data symbol stream being just transmitted across to send path by j again after the space block coding module 230 of j block code pattern being carried out 1 pair of j space block coding via execution 1 to send.Wherein, i is less than y and the integer more than or equal to 2, and j may be less than or is equal to y and the integer more than i.In one embodiment, i can be 2l, j can be 2l+1, and l is the integer more than 1.
Please merge with reference to Fig. 7 B, when the transmission quality that detector unit 260 detects at least one transmission path uses block code pattern (step S51) more than minimum more than or equal to preset value (step S44) and RF transport systems, switch to, according to control signal Tx_md, the block code pattern (step S54) using little one-level, and use the block code pattern of little one-level to send next data symbol stream (step S55) to transmit diversity block coding techniques by the transmission path of respective amount.
That is, when detector unit 260 judges to demote the quantity sending path, from performing 1, the space block coding module 230 of j block code pattern is switched to the execution 1 space block coding module 230 to i block code pattern according to control signal Tx_md, path selection module 240 switches to turn on space block coding module 230 from conducting space block coding module 230 with j transmission path according to control signal Tx_md and sends path with i simultaneously, then cause next data symbol stream to send path by i again after the space block coding module 230 of i block code pattern being carried out 1 pair of i space block coding via execution 1 to send.
When the transmission quality that detector unit 260 detects at least one transmission path uses minimum block code pattern (step S52) more than or equal to preset value (step S44) and RF transport systems system, switch to according to control signal Tx_md and do not use block code pattern and use single to send path (step S56), and do not carry out space block coding and directly send next data symbol stream (step S57) by the transmission path sending in path transmitting diversity technique.
That is, the block code pattern assuming minimum is 1 to 2 block code patterns, when detector unit 260 judges to demote the quantity sending path, from performing 1 according to control signal Tx_md the space block coding module 230 of 2 block code patterns is switched to do not perform space block coding, path selection module 240 sends path according to control signal Tx_md from conducting space block coding module 230 and 2 and switches to conducting pre-processing module 210 and a transmission path simultaneously, then cause next data symbol stream to stride across space block coding module 230 directly to be sent by single transmission path (with the transmission path of pre-processing module 210 conducting).
When the transmission quality that detector unit 260 detects at least one transmission path sends signal (step S53) more than or equal to preset value (step S44) and RF transport systems with single transmission path, maintain and send next data symbol stream or the data symbol stream (step S58) just sent by single transmission path.
That is, when RF transport systems has been that the quantity sending path using minimum level is when sending signal, even if detector unit 260 judgement need to be demoted in the case of the quantity in transmission path, path selection module 240 still maintains conducting pre-processing module 210 and a transmission path, then causes next data symbol stream to stride across space block coding module 230 and is directly sent by single transmission path (with the transmission path of pre-processing module 210 conducting).
Then, by repeatedly performing detection and forwarding step until completing the transmission (step S39) of all of data symbol stream.
For example, with reference to Fig. 8, radio frequency system 20 has 4 and sends path 250-1,250-2,250-3,250-4 and 2 spaces block coding module 230-1,230-2.
Space block coding module 230-1 is 1 to 2 block code patterns, and sends paths corresponding to 2.Further, space block coding module 230-1 can be made to send path corresponding to 4 wantonly 2 sent in path 250-1,250-2,250-3,250-4 by the selection of path selection module 240.
Space block coding module 230-2 is for performing 1 to 4 block code patterns, and sends paths corresponding to 4.
Original state, handover module 220 turns on the input of pre-processing module 210 and space block coding module 230-2, and path selection module 240 turns on the outfan of space block coding module 230-2 and corresponding transmission path 250-1,250-2,250-3,250-4.
After transmission data are processed into multiple data symbol stream by pre-processing module 210, the input of first data symbol stream is to space block coding module 230-2, in order to send by sending path 250-1,250-2,250-3,250-4 transmitting diversity block coding techniques.
Then, detector unit 260 detection is utilized to send the transmission quality in path.
When detector unit 260 detects the transmission quality sending path less than preset value, handover module 220 and path selection module 240 maintain current conducting state, by second data symbol stream input to space block coding module 230-2, in order to send by sending path 250-1,250-2,250-3,250-4 transmitting diversity block coding techniques.
When detector unit 260 detects the transmission quality sending path more than or equal to preset value, handover module 220 switches to the input of conducting pre-processing module 210 and space block coding module 230-1 according to control signal Tx_md, and path selection module 240 is according to the outfan of control signal Tx_md conducting space block coding module 230-1 and 2 transmission paths in transmission path 250-1,250-2,250-3,250-4.In certain embodiments, this transmits top-quality 2 transmission paths in can be all transmission paths 250-1,250-2,250-3,250-4 in 2 transmission paths of conducting with space block coding module 230-1.
Then, by second data symbol stream input to space block coding module 230-1, in order to sent by 2 transmission paths (sending paths with 2 of space block coding module 230-1 conducting) of correspondence transmitting diversity block coding techniques.Further, after transmission, the detection of recycling detector unit 260 sends the transmission quality in path.
When detector unit 260 detects the transmission quality sending path less than preset value, handover module 220 switches to the input of conducting pre-processing module 210 and space block coding module 230-2 according to control signal Tx_md, and path selection module 240 turns on outfan and transmission path 250-1,250-2,250-3,250-4 of space block coding module 230-2 according to control signal Tx_md.Then, again by second data symbol stream input to space block coding module 230-2, in order to send by sending path 250-1,250-2,250-3,250-4 transmitting diversity block coding techniques.
When detector unit 260 detects the transmission quality sending path more than or equal to preset value, handover module 220 switches to conducting pre-processing module 210 and path selection module 240 according to control signal Tx_md, and path selection module 240 is according to control signal Tx_md conducting handover module 220 and 1 the transmission path sent in path 250-1,250-2,250-3,250-4.In certain embodiments, this transmits top-quality 1 transmission path in can be all transmission paths 250-1,250-2,250-3,250-4 in transmission path of conducting with handover module 220.
Then, 3rd data symbol is flowed through and is transmitted to the transmission path turned on handover module 220 by handover module 220 and path selection module 240, in order to transmit diversity technique by this send path (with handover module 220 conducting transmission path) send.Further, after transmission, the detection of recycling detector unit 260 sends the transmission quality in path.
When detector unit 260 detects the transmission quality sending path less than preset value, handover module 220 switches to the input of conducting pre-processing module 210 and space block coding module 230-1 according to control signal Tx_md, and path selection module 240 sends path according to the outfan of control signal Tx_md conducting space block coding module 230-1 with wantonly 2 sent in path 250-1,250-2,250-3,250-4.Then, again by the 3rd data symbol stream input to space block coding module 230-1, in order to send paths by 2 of conducting and send transmitting diversity block coding techniques.
When detector unit 260 detects the transmission quality sending path more than or equal to preset value, handover module 220 and path selection module 240 maintain the conducting state of pre-processing module 210 and single transmission path, or the single transmission path of conducting is switched to according to control signal Tx_md and the top-quality transmission path of transmission detected by handover module 220 and path selection module 240.Then, continue to flow through fourth data symbol and transmitted to the transmission path turned on handover module 220 by handover module 220 and path selection module 240, in order to transmit diversity technique by this send path (with handover module 220 conducting transmission path) send.
By repeatedly performing detection and forwarding step until completing the transmission of all of data symbol stream.
In fig. 8, send although drawing out and be individually present individually between the bang path in path and multiple space block coding module 230-1,230-2 using single transmission path to send handover module in the case of signal 220 and, but the restriction of this non-invention, use single transmission path send handover module in the case of signal 220 and send between the bang path in path and multiple space block coding module 230-1,203-2 can sharing channel, as shown in Figure 9.
Fig. 9 is the schematic diagram of the transmitting portion of the RF transport systems of another embodiment.
In other words, in certain embodiments, with reference to Fig. 9, aforesaid handover module 220 can be built in the space block coding module 230 that can perform multiple block code pattern, and built-in handover module is in order to switch the running of space block coding module 230.The function mode of RF transport systems is generally as aforementioned.
Wherein, the running of aforesaid space block coding module 230-2 is equivalent to control signal Tx_md and enables space block coding module 230 and perform 1 to 4 block code patterns, and the first outfan No1 of space block coding module 230, the second outfan No2, the 3rd outfan No3 and the 4th outfan No4 are also respectively turned on to sending path 250-1,250-2,250-3,250-4 (1 to 1 electrical connection) by path selection module 240 according to control signal Tx_md simultaneously.
The running of aforesaid space block coding module 230-1 is then equivalent to control signal Tx_md enable space block coding module 230 and performs 1 to 2 block code patterns, wantonly 2 transmission paths (1 to 1 electrical connection) that the first outfan No1 and the second outfan No2 of space block coding module 230 are respectively turned on to transmission path 250-1,250-2,250-3,250-4 also according to control signal Tx_md by path selection module 240 simultaneously.Now, space block coding module 230 only first outfan No1 and the second outfan No2 can output signal.
The running of aforesaid single transmission road warp is then equivalent to control signal Tx_md and does not enable space block coding module 230, pre-processing module 210 is made to be conducted to the first outfan No1 through space block coding module 230, i.e. space block coding module 230 does not carry out space block coded treatment and directly exports the data symbol stream from pre-processing module 210 from the first outfan No1, first outfan No1 of space block coding module 230 is conducted to send path 250-1 by path selection module 240 also according to control signal Tx_md simultaneously, 250-2, 250-3, wantonly 1 in 250-4 sends path (1 to 1 electrical connection).Now, space block coding module 230 only first outfan No1 can output signal.
In certain embodiments, the assembly between assembly or HPI 10 and radio-frequency (RF) transmitter 256 and the radio frequency receiver 296 between HPI 10 and RF transceiver 310 can use one or more processing unit and arrange in pairs or groups one or more storage operational order and the storage element of firmware/software and realize.Processing unit can be microprocessor, microcontroller, digital signal processor, microcomputer, central processing unit, field programming gate array, programmable logic device, stater, logic circuit, analog circuit, digital circuit and/or any equipment based on operational order operation signal (simulation and/or numeral).Storage element can be single or multiple storage element.Storage element can be read only memory, random-access memory, impermanency internal memory, permanent from initial stage, static memory, Dram, flash memory and/or the equipment of any storage digital information.
In sum, the radio frequency transfer approach of the switching at runtime block coding according to the present invention and RF transport systems thereof are when carrying out signal and sending, the quantity sending path in order to send signal can be selected according to the transmission penetration quality dynamic in currently transmitted path, and can dynamically choose whether open space block coded treatment and open the pattern of space block coded treatment, with take into account biography produce effects can and system power consumption.When RF transport systems judges to be not required to transmit signal with multiple transmission paths, be switched on less block code pattern and or be not turned on space block coded treatment, and with less block code pattern or directly transmit signal, to save system power consumption with single transmission path.Otherwise, when RF transport systems judges that biography receipts situation is bad, just automatically turn on bigger block code pattern to reach preferable delivery quality.
Although the present invention is disclosed above with aforementioned embodiment; so it is not limited to the present invention; any personnel being familiar with similar technique; without departing from the spirit and scope of the present invention; when making a little change and amendment, therefore the scope of patent protection of the present invention must be depending on being as the criterion that this specification appending claims is defined.
Claims (16)
1. a radio frequency transfer approach, including:
Utilize a pre-processing module that one transmission data are processed into multiple data stream；
Use multiple transmission path that the plurality of data stream is transmitted, and determine the transmission quality in the plurality of transmission path；And
According to the transmission quality in the plurality of transmission path decide whether to utilize a space block coding module to transmit diversity block coding techniques via at least one of the plurality of transmission path to send corresponding data stream,
Wherein, the described transmission quality according to the plurality of transmission path decides whether to utilize a space block coding module to include via the multiple steps sending each data symbol stream in the plurality of transmission path to transmit diversity block coding techniques:
When the transmission quality the plurality of transmission path being detected uses maximum block code pattern less than a preset value and described space block coding module present mode, maintain and use maximum block code pattern to send next data symbol stream to transmit diversity block coding techniques by the plurality of transmission path；
When the transmission quality the plurality of transmission path being detected not yet uses maximum block code pattern less than described preset value and described space block coding module present mode, the block code pattern using big one-level is switched to be sent this data symbol stream of just transmission by the described transmission path of respective amount to transmit diversity block coding techniques；
When the transmission quality of at least one detected in the plurality of transmission path uses the block code pattern beyond minimum block code pattern more than or equal to described preset value and described space block coding module present mode, the block code pattern using little one-level is switched to send next described data symbol stream to transmit diversity block coding techniques by the described transmission path of respective amount；
When the transmission quality of at least one detected in the plurality of transmission path uses minimum block code pattern more than or equal to described preset value and described space block coding module present mode, switch to by next described data symbol stream of transmission in the plurality of transmission path；And
When the transmission quality of at least one detected in those transmission paths are more than or equal to described preset value and do not utilize described space block coding module to send signal, maintain and send the firm described data symbol stream sent or next described data symbol stream with in those transmission paths with not utilizing described space block coding module.
Radio frequency transfer approach the most according to claim 1, wherein, the described transmission quality according to the plurality of transmission path decides whether to utilize a space block coding module to include via the multiple steps sending respectively this data symbol stream in the plurality of transmission path to transmit diversity block coding techniques:
When the transmission quality of at least one detected in the plurality of transmission path is more than or equal to a preset value, control a handover module and turn in the most described at least one transmission path of described pre-processing module, and send next data symbol stream via the described transmission path of conducting；And
When the transmission quality the plurality of transmission path being detected is less than described preset value, control described handover module and turn on described pre-processing module extremely described space block coding module, to utilize described space block coding module to transmit diversity block coding techniques via the plurality of transmission path to send described data symbol stream.
Radio frequency transfer approach the most according to claim 2, wherein, when described handover module from turn on described pre-processing module switch to turn on described pre-processing module to described space block coding module to the plurality of transmission path time, utilize the described data symbol stream that described space block coding module just sends to transmit diversity block coding techniques to send via the plurality of transmission path.
Radio frequency transfer approach the most according to claim 1, wherein, the step of the transmission quality in described decision the plurality of transmission path includes: corresponding to the transmission of each described data symbol stream, detect the transmission quality in the plurality of transmission path.
Radio frequency transfer approach the most according to claim 4, wherein, described detecting step includes: detect the signal intensity receiving signal that the plurality of transmission path is corresponding.
Radio frequency transfer approach the most according to claim 4, wherein, described detecting step includes: detect the channel frequency response of RX path corresponding to the plurality of transmission path.
Radio frequency transfer approach the most according to claim 6, wherein, the step of described this channel frequency response of detection includes:
The estimation channel parameter in each described transmission path of each subcarrier；
A threshold value is utilized to calculate the described transmission quality in the plurality of transmission path respectively with the described channel parameter in the plurality of transmission path；And
By preset value respectively with described transmission mass ratio relatively.
Radio frequency transfer approach the most according to claim 4, wherein, described detecting step includes: detect the transfer rate in the plurality of transmission path.
Radio frequency transfer approach the most according to claim 1, wherein, described process step includes: utilize described pre-processing module to encode described transmission data, staggered and reflection processes to produce into these data symbol stream.
Radio frequency transfer approach the most according to claim 1, wherein, described space block coding module has multiple block code pattern, the described transmission path of the varying number in the plurality of block code pattern corresponding the plurality of transmission path respectively, the corresponding all of described transmission path of maximum block code pattern, and the described transmission path of block code pattern correspondence at least two of minimum.
11. 1 kinds of RF transport systems, including:
One pre-processing module, in order to be processed into multiple data symbol stream by transmission data；
Multiple transmission paths；
One space block coding module, is electrically connected to the plurality of transmission path；
One handover module, is electrically connected to described pre-processing module；And
One detector unit, in order to detect the transmission quality in the plurality of transmission path to control described handover module, wherein, described handover module decides whether to utilize a space block coding module to transmit diversity block coding techniques via the plurality of transmission path to send each described data symbol stream according to the transmission quality in the plurality of transmission path
Wherein, when the transmission quality of at least one during described detector unit detects the plurality of transmission path does not currently utilize described space block coding module to send signal more than or equal to a preset value and described RF transport systems, the described handover module described pre-processing module of maintenance conducts with a 's in the plurality of transmission path, to send next described data symbol stream via described transmission path with causing unfavorable space block coding module；When the transmission quality of at least one during described detector unit detects the plurality of transmission path uses the transmission signal in multiple block code patterns of multiple spaces block coding module more than or equal to this preset value and this RF transport systems, described handover module switches the annexation of the output stage of described pre-processing module, to cause described pre-processing module conductance to pass in the plurality of transmission path or conductance passes to the described transmission path of the quantity than the little one-level in the plurality of transmission path corresponding to this current block code pattern, and make next described data symbol stream not utilize described space block coding module ground or utilize the described space block coding module of described block code pattern of little one-level to send via the described transmission path of the quantity of little one-level；When the transmission quality that described detector unit detects the plurality of transmission path is not maximum described block code pattern less than described preset value and described space block coding module, described handover module switches the annexation of the described output stage of described pre-processing module, to cause described pre-processing module conductance to pass to the transmission path than the quantity sending the big one-level in path corresponding to currently employed block code pattern, and make next described data symbol stream utilize big one-level described block code pattern described space block coding module via the quantity of big one-level described transmission path send；And when the transmission quality that described detector unit detects the plurality of transmission path is currently maximum described block code pattern less than described preset value and described space block coding module, the described handover module described pre-processing module of maintenance conducts with all described transmission paths, to cause next described data symbol stream to utilize the described space block coding module of maximum described block code pattern to send via all of described transmission path.
12. RF transport systems according to claim 11, wherein, when the transmission quality of at least one during described detector unit detects the plurality of transmission path is more than or equal to a preset value, described handover module turns in described pre-processing module and the plurality of transmission path, with via the described transmission path turned on this pre-processing module to send described data symbol stream；And when described detector unit detects the transmission quality in the plurality of transmission path less than described preset value, described handover module turns on described pre-processing module and described space block coding module, to utilize described space block coding module to transmit diversity block coding techniques via the plurality of transmission path to send described data symbol stream.
13. RF transport systems according to claim 11, further include: a path selection module, it is electrically connected to described handover module, described space block coding module and the plurality of transmission path, with under the control of described detector unit, described handover module and described transmission path are conducted and maybe this space block coding module and the plurality of transmission path are conducted by corresponding described handover module.
14. RF transport systems according to claim 13, wherein, each described transmission path includes:
One fast Flourier inverse transform module, is electrically connected to described path selection module；
One digital analog converter, is electrically connected to described fast Flourier inverse transform module；
One radio-frequency (RF) transmitter, is electrically connected to described digital analog converter；And
One antenna, is electrically connected to described RF transport systems.
15. RF transport systems according to claim 11, also include:
At least one RX path；And
One channel estimation device, be connected to described between at least one RX path and described detector unit.
16. RF transport systems according to claim 11, wherein, described space block coding module has multiple block code pattern, the described transmission path of the varying number in the plurality of block code pattern corresponding the plurality of transmission path respectively, the corresponding all of described transmission path of maximum block code pattern, and the described transmission path of block code pattern correspondence at least two of minimum.
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