CN101267418B - Method, device and system for sending and receiving communication system parameters - Google Patents
Method, device and system for sending and receiving communication system parameters Download PDFInfo
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- CN101267418B CN101267418B CN2007100867562A CN200710086756A CN101267418B CN 101267418 B CN101267418 B CN 101267418B CN 2007100867562 A CN2007100867562 A CN 2007100867562A CN 200710086756 A CN200710086756 A CN 200710086756A CN 101267418 B CN101267418 B CN 101267418B
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Abstract
The invention discloses a method for sending a communication system parameter, comprising the steps of: selecting an autocorrelation signal corresponding to the communication system parameter as a leading signal; combining the leading signal and a data frame to form a signal frame; sending the signal frame. The invention also discloses a method for receiving the communication system parameter, comprising: receiving the signal frame, identifying the autocorrelation signal as the leading signal in the signal frame; reading corresponding communication system parameter from a parameter table according to the autocorrelation signal. The invention also discloses a device sending the communication system parameter, a device receiving the communication system parameter, and a system transmitting the communication system parameter. The invention transmits the communication system parameter with the leading signal without occupying a data frame or a data frame header, so that the invention reduces cost of system, and enhances utilization ratio of channel as well as transmission efficiency.
Description
Technical field
The present invention relates to the technical field of transport communication system parameters, particularly send the method for communication system parameter, the method for received communication system parameters, device, the device of received communication system parameters and the system of transport communication system parameters of transmission communication system parameter.
Background technology
The universal model of communication system is as shown in Figure 1, mainly is divided into transmitting terminal, receiving terminal and the channel of transmission signals between transmitting terminal and receiving terminal.
In model shown in Figure 1, transmitting terminal mainly comprises information source and converter.The effect of information source is to become primary signal to various possible message conversion.Converter can not be directly be transformed into the signal of telecommunication with primary signals such as the language of electromagnetic transmission, images, and this signal of telecommunication is further changed, and makes it be transformed into the signal of telecommunication that is fit to certain concrete Channel Transmission, and this signal of telecommunication is loaded with original information equally.
Receiving terminal generally includes the inverse transformer and the stay of two nights.The basic function of inverse transformer is to accomplish the inverse transformation of converter, promptly carries out operations such as demodulation, decoding, decoding, from the reception signal that has interference, correctly recovers corresponding primary signal.For multiplex signal, the receiving terminal inverse transformer also has removes function multiplexed and the correct shunt of realization.Inverse transformer need be known the employed parameter of transmitting terminal converter when carrying out inverse transformation, like modulation system, error correction coding mode etc., have only the inverse transformer parameter identical with converter using, and the signal that transmitting terminal sends could correctly be recovered.The effect of the stay of two nights is to convert the primary signal of recovering to corresponding message.
Channel is meant the passage of transmission signals, can be wired, also can be wireless, and wire message way and wireless channel all have multiple transmission medium.Channel also produces various interference and noise to signal in transmission signals.The inherent characteristic of transmission medium is directly connected to the quality of communicating by letter with disturbing.Noise source among Fig. 1 is noise in the channel and the concentrated expression that is dispersed in other noises everywhere of communication system.
Communication system parameter commonly used can be divided into the parameter of physical layer and the parameter of upper-layer protocol at present, relates generally to the parameter of physical layer here, and physical layer parameter commonly used at present is following:
(1) modulation system.When converter further converts the signal of telecommunication to be fit to certain concrete Channel Transmission the signal of telecommunication, need modulate, modulation system commonly used has BPSK, QPSK, 8PSK, 16QAM, 32QAM, 64QAM, 128QAM, 256QAM and 512QAM etc.A communication system generally can be chosen several kinds of modulation systems, as choose QPSK, 32QAM, 128QAM etc. for transmitting the data of different rates.
(2) error correction coding mode.In model of communication system; The signal of telecommunication of transmission can receive the influence of noise source and channel distortions; Make the signal of telecommunication change, cause the inverse transformer of receiving terminal can't recover the original signal of telecommunication, so communication system can be chosen the different correction code mode according to the applied environment of system usually; Through increasing the redundant signal of telecommunication, improve the signal error correcting capability of system.Error correction coding mode commonly used has BCH code, RS sign indicating number, convolution code, turbo sign indicating number, LDPC sign indicating number and some error detection codes, like CRC etc.In each mode, different parameter configuration can be arranged, as the coding of different rates such as 1/2,1/3,1/4,2/3 is arranged in the convolution code, thereby reach different error correction or error detecing capabilities.
(3) interleaving mode.The energy that the decline of noise jamming and the channel of burst can cause a certain segment signal very a little less than, make whole segment signal generation mistake when receiving.Because the error correction that system adopts or the error correction or the error detecing capability of error detection coding method have certain limit, so when one piece of data is all wrong, can't error correction, so must this core dumped be distributed in each segment data and go, Here it is interweaves.System adopts different interleaving modes according to different application environments.
(4) position of number of sub carrier wave and subcarrier.In the communication system that adopts OFDM (OFDM) technology, some frequency possibly produce error code because be interfered, for reducing the error rate, can not use these frequencies; The signal of system's emission also possibly exert an influence to other system; Need some frequency of shielding; Therefore thereby reach the requirement of Electro Magnetic Compatibility, in some communication systems, can adopt the different subcarriers configuration, like the frequency number that adopts, the position etc. of adopted frequency not.
(5) other system parameter is like the transmission time slot of data frame length, message transmission rate, distribution, parameters such as protection interval in the ofdm system.
The said system parameter be configured in transmitting terminal and receiving terminal can be changeless.But in order to reach different systematic function and transmission rates, these parameters also can change at any time.
In wireless communication system or power carrier communication system; When the above-mentioned parameter of transmitting terminal changes; Must notify inverse transformer with these parameters to receiving terminal; Make it know the parameter that the transmitting terminal converter uses, only in this way the receiving terminal inverse transformer could correctly be recovered the signal that sends.So, just need the parameter that transmitting terminal adopted be transferred to the mechanism of receiving terminal.
In communication system, transmitting terminal and receiving terminal will communicate, and at first will carry out the synchronizing process of time and frame, and only after both sides had set up synchronously, receiving-transmitting sides just was in synchronous regime when transmitting and receive data, could the right demodulation signal.All be provided with in the communication system and be used for synchronous targeting signal.Common signal frame structure is as shown in Figure 2, comprises two parts of targeting signal and Frame.
The mode that following several kinds of transport communication system parameterss are arranged in the prior art, usually.
Prior art one: negotiation mode
Prepare when another one equipment sends information at an equipment; Both sides at first approve with both sides or the most reliably parameter given tacit consent to communicates; After connecting; Transmitting terminal is placed on the communication system parameter in the Frame and transmits as data, through sending the definite and transmission system parameters of mode that Frame is held consultation.
The signal frame structure that in negotiation mode, adopts usually constitutes by mode as shown in Figure 3, that is, system parameters is placed in the deblocking, then deblocking and targeting signal is formed signal frame, wherein comprises said system parameters in the Frame.
Adopt the process of negotiation mode transmission system parameters following:
(1) transmitting terminal at first carries out address discovery (Address Discovery) process when transfer of data, in this process, sends broadcast frame and waits for the response of receiving device, and transmitting terminal is obtained the address of receiving device after receiving the response frame of receiving terminal.
(2) transmitting terminal connects (Connect) process after obtaining partner address, in this process transmitting terminal will with the receiving device negotiate transmission parameters, like baud rate, packet size, transmission time slot etc., connect afterwards.In general, because negotiations process needs affirmation each other, so can the long time.
(3) back that connects gets into message transmission (Information Transfer) process, and transmitting terminal and receiving terminal carry out transfer of data and verification, and carry out the transmitting-receiving of timeslice Frame according to certain algorithm and control.
(4) get into (Disconnect) process of disconnection after transfer of data finishes, transmitting terminal breaks off with receiving terminal and being connected.
Adopt the negotiation mode transmission system parameters to have following defective: because the long time of the common cost of negotiations process, so this mode needs could confirm than the long time parameter of whole system; Each parameter process of all need holding consultation again that changes, very loaded down with trivial details, and need the cost more time; In addition, owing to need system parameters be placed in the deblocking, also taken the resource of transmission normal data.
Prior art two: frame head load mode
Prepare when receiving device sends Frame, the parameter informations such as modulation system of want data block transmitted to be placed on the frame head part of Frame at sending ending equipment.This mode is maximum a kind of mode of present usefulness.
The signal frame structure that in the frame head load mode, is adopted constitutes by mode as shown in Figure 4; That is, data are imported deblocking, and with comprise that the frame head of system parameters is multiplexed into Frame together; Then with Frame and targeting signal component frame, thereby form signal frame.
In this mode, the structure of Frame is as shown in Figure 5, comprises frame head and data block.Wherein, the frame head part is as shown in Figure 6, comprises various system parameterss, for example domain name, frame length, CRC length etc.
When adopting the frame head load mode, receiving terminal is the frame head of receiving end/sending end transmission at first, and therefrom the parameter of extraction system adopts these parameters then in to the reception of data block.
Adopt the frame head load mode to have following defective:,, need carry out the error correction coding more complicated to frame head than data block for to anti-interference because system parameters is very important; Efficient when in addition, adopting the frame head transmission system parameters is lower.
Prior art three: parameter Estimation mode
When adopting the parameter Estimation mode, in data frame structure, only want the data block transmitted part, do not have frame head.After communication system was normally set up communication, in order to realize Adaptive Transmission, receiving terminal was according to the pilot signal estimated channel quality; Receiving terminal sends to transmitting terminal with channel quality status, and transmitting terminal is selected suitable transmission means according to the channel situation of receiving; Then, transmitting terminal adopts new system parameters according to channel quality, and receiving terminal adopts the blind Detecting technology to draw the system parameters that transmitting terminal adopts.
The defective of this system parameters transmission means is following: information transmitted makes a mistake owing to the decline or the interference of wireless channel easily, will cause the error prediction of receiving terminal to parameter, thereby cause selecting inappropriate demodulation mode, causes data transmission fault; Parameter estimation algorithm is complicated, be difficult for realizing, and not all parameter can both estimate through blind Detecting, generally only can estimate modulation system.
In addition, adaptive technique can be modulated and coded system according to instantaneous channel quality status of receiving terminal and the only down link of current resource selection, thereby makes receiving terminal obtain to try one's best high data throughput.When receiving terminal was in favourable communication locations, data were sent the channel coding method that can adopt high order modulation and two-forty, like 16QAM and 3/4 code rate, thereby obtain high peak rate; And when receiving terminal was in disadvantageous communication locations, network was then chosen the channel coding schemes of low-order-modulated mode and low rate, and for example QFSK and 1/4 code rate guarantee communication quality.Therefore, adopt adaptive technique can improve the efficient of system.
In wireless or power line communication; Accomplish this adaptive technique; Need the system parameters after in time transmission changes, in the present method or need receiving-transmitting sides to hold consultation, cause the extra time overhead of needs; Need extra frame head expense, blind in addition estimation technique is because its limitation still can not practical application.
Summary of the invention
In view of this, the embodiment of the invention has proposed a kind of method of sending the communication system parameter, the system overhead during in order to the reduction transmission system parameters.The embodiment of the invention has also proposed the method for received communication system parameters, device, the device of received communication system parameters and the system of transport communication system parameters of transmission communication system parameter.
The embodiment of the invention provides a kind of method of sending the communication system parameter, and this method comprises:
Selection and the corresponding autocorrelation signal of communication system parameter are as targeting signal;
Said targeting signal and Frame are formed signal frame together;
Send said signal frame;
Wherein, When said autocorrelation signal is frame synchronization sequence; Select to comprise as targeting signal: under the situation of the shared targeting signal of a plurality of Frames with the corresponding frame synchronization sequence of communication system parameter; Select two frame synchronization sequences as a targeting signal, and the distance of said two frame synchronization sequence relevant peaks is corresponding to said communication system parameter; Perhaps, under the situation of each Frame, select a frame synchronization sequence as a targeting signal, and the distance of this frame synchronization sequence relevant peaks and last signal frame synchronizing sequence relevant peaks is corresponding to said communication system parameter with a targeting signal.
The embodiment of the invention also provides a kind of method of received communication system parameters, and this method comprises: receive signal frame, and discern in the said signal frame autocorrelation signal as targeting signal; From parameter list, read corresponding communication system parameter according to said autocorrelation signal; Wherein, When said autocorrelation signal is frame synchronization sequence; Under the situation of the shared targeting signal of a plurality of Frames, the step that from parameter list, reads corresponding communication system parameter according to frame synchronization sequence comprises: the relevant peaks that detects two frame synchronization sequences in the said signal frame; Calculate the relevant peak-to-peak distance of said two frame synchronization sequences; From parameter list, read corresponding communication system parameter according to said distance.
The embodiment of the invention also provides a kind of device that sends the communication system parameter; This device comprises targeting signal selection module, framing module and sending module; Wherein: targeting signal select module be used for selecting with the corresponding autocorrelation signal of communication system parameter as targeting signal, and this targeting signal offered the framing module; The framing module is used for this targeting signal and Frame are formed signal frame together, and signal frame is offered sending module; Sending module is used to send said signal frame;
Wherein, said autocorrelation signal is a frame synchronization sequence, and said targeting signal selects module to comprise:
Judge module, be used for judging be the shared targeting signal of a plurality of Frames or each Frame with a targeting signal, and judged result offered the selection module;
Select module; Be used under the situation of the shared targeting signal of a plurality of Frames, selecting two frame synchronization sequences as a targeting signal; And the distance of said two frame synchronization sequence relevant peaks is corresponding to said communication system parameter; Select a frame synchronization sequence as a targeting signal at each Frame under with the situation of a targeting signal, and the distance of this frame synchronization sequence relevant peaks and last signal frame synchronizing sequence relevant peaks is corresponding to said communication system parameter.
The embodiment of the invention also provides a kind of device of received communication system parameters; This device comprises receiver module, identification module, searches module and memory module, and wherein: memory module is used for the parameter list that storage package contains corresponding relation between autocorrelation signal and the communication system parameter; Receiver module is used to receive signal frame, and offers identification module; Identification module is used for discerning the autocorrelation signal of said signal frame as targeting signal; Searching module is used for reading corresponding communication system parameter according to the parameter list that said autocorrelation signal is preserved from said memory module; Said autocorrelation signal is a frame synchronization sequence; The said module of searching comprises peak detector, peak memory, distance calculator and lookup unit, wherein:
Said peak memory is used to store said frame synchronization sequence relevant peaks and position thereof;
Said peak detector is used for detecting the relevant peaks of said signal frame synchronizing sequence, with current detection to relevant peaks be saved in said peak memory and offer said distance calculator;
Said distance calculator be used for according to said current detection to relevant peaks and the peak memory last relevant peaks of preserving, calculate the relevant peak-to-peak distance of said two frame synchronization sequences, and this distance offered said lookup unit;
Said lookup unit is used for reading corresponding communication system parameter according to said distance from parameter list.
The embodiment of the invention also provides a kind of system of transport communication system parameters; This system comprises transmitting terminal and receiving terminal; Transmitting terminal comprises targeting signal selection module, framing module and sending module, and receiving terminal comprises receiver module, identification module, searches module and memory module, wherein:
Targeting signal select module be used for selecting with the corresponding autocorrelation signal of communication system parameter as targeting signal, and this targeting signal offered the framing module;
The framing module is used for this targeting signal and Frame are formed signal frame together, and signal frame is offered sending module;
Sending module is used to send said signal frame;
Memory module is used for the parameter list that storage package contains corresponding relation between autocorrelation signal and the communication system parameter;
Receiver module is used to receive signal frame, and offers identification module;
Identification module is used for discerning the autocorrelation signal of said signal frame as targeting signal;
Searching module is used for reading corresponding communication system parameter according to the parameter list that said autocorrelation signal is preserved from said memory module;
Said autocorrelation signal is a frame synchronization sequence; Said targeting signal selects module to comprise:
Judge module, be used for judging be the shared targeting signal of a plurality of Frames or each Frame with a targeting signal, and judged result offered the selection module;
Select module; Be used under the situation of the shared targeting signal of a plurality of Frames, selecting two frame synchronization sequences as a targeting signal; And the distance of said two frame synchronization sequence relevant peaks is corresponding to said communication system parameter; Select a frame synchronization sequence as a targeting signal at each Frame under with the situation of a targeting signal, and the distance of this frame synchronization sequence relevant peaks and last signal frame synchronizing sequence relevant peaks is corresponding to said communication system parameter.
From such scheme, can find out; Since the present invention when sending the communication system parameter, select with the corresponding autocorrelation signal of communication system parameter as targeting signal; Utilize the transmission of this targeting signal to make receiving terminal know the communication system parameter corresponding then, so just utilized existing targeting signal, do not take Frame or Frame frame head with it; Thereby reduced the expense of system, and improved the utilance and the efficiency of transmission of channel.In addition, the present invention directly utilizes targeting signal to transmit the corresponding communication system parameters, need not carry out the negotiation between transmitting terminal and the receiving terminal, so shortened the time of transport communication system parameters, has improved efficiency of transmission.
Description of drawings
Fig. 1 is the structural representation of communication system universal model in the prior art;
Fig. 2 is the sketch map of signal frame structure in the communication system in the prior art;
Fig. 3 is the sketch map of the signal frame that negotiation mode adopted in the prior art;
Fig. 4 is the sketch map of the signal frame that the frame head load mode is adopted in the prior art;
Fig. 5 is the structural representation of the Frame that the frame head load mode is adopted in the prior art;
Fig. 6 is the structural representation of the frame head that the frame head load mode is adopted in the prior art;
Fig. 7 is the sketch map of targeting signal and data frame structure in the embodiment of the invention;
Fig. 8 is the sketch map of the shared targeting signal of a plurality of Frames in the embodiment of the invention;
Fig. 9 be in the embodiment of the invention each Frame with the sketch map of a targeting signal;
Figure 10 is the schematic flow sheet that transmitting terminal sends the communication system parameter in the embodiment of the invention;
Figure 11 is the sketch map of transmitting terminal framing in the embodiment of the invention;
Figure 12 is the structural representation of signal frame during the shared targeting signal of a plurality of Frames in the embodiment of the invention;
Figure 13 is the structural representation of signal frame when each Frame is with a targeting signal in the embodiment of the invention;
Figure 14 is the sketch map that forms one 8 rank multinomial PN sequence in the embodiment of the invention;
Figure 15 is the schematic flow sheet of receiving terminal received communication system parameters in the embodiment of the invention;
Figure 16 is the structural representation of the device that is used to send the communication system parameter in the embodiment of the invention;
Figure 17 is for being used for the structural representation of the device of received communication system parameters in the embodiment of the invention;
Figure 18 is the structural representation that is used for the device of received communication system parameters when adopting frame synchronization sequence in the embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below lift embodiment to further explain of the present invention.
As previously mentioned, communication system is employed in usually and a targeting signal is set before the Frame comes the subsidiary communications system to accomplish synchronizing process.Fig. 7 has provided the structural representation of targeting signal and Frame.As shown in Figure 7, targeting signal can be shared one of several Frames, also can be that each Frame uses one.The autocorrelation that the general employing of targeting signal can provide accurate timing information is autocorrelation signal preferably; For example, targeting signal can be a frame synchronization sequence, also can be Bark (Barker) sign indicating number in the radar; Perhaps other autocorrelation signal preferably, thus accurate timing information can be provided.
Signal frame structure sketch map when Fig. 8 and Fig. 9 have provided the shared targeting signal of a plurality of Frames and each Frame with a targeting signal respectively.In Fig. 8, n the shared targeting signal of Frame, so corresponding n the Frame of each targeting signal.In Fig. 9, n Frame is respectively with a targeting signal, so the corresponding Frame of each targeting signal.
The embodiment of the invention is through selecting to use the corresponding targeting signal of communication system parameter with transmitting terminal; And with sending to receiving terminal behind this leading signal and the Frame composition signal frame; Receiving terminal reads corresponding communication system parameter according to this targeting signal from the parameter list of self preserving communication system parameter and targeting signal corresponding relation then, thereby has realized utilizing targeting signal to transmit the system parameters that adopts in a frame or the multiframe Frame.Therefore, the communication system parameter transmission plan that the embodiment of the invention proposed does not need through consultation, in addition, is existing targeting signal owing to what utilize, so do not need extra Frame frame head or Frame expense yet.
Be the implementation process of the example explanation embodiment of the invention below with the frame synchronization sequence.Frame synchronization sequence is made up of preceding buffering, pseudorandom (PN) sequence and back buffering.Buffering is the cyclic extensions of PN sequence with the back buffering wherein, and its length can be provided with as the case may be.The PN sequence is a pseudo random sequence, and its length is by the multinomial decision that produces the PN sequence.Frame synchronization sequence is to produce through the initial phase of selecting PN sequence generator polynomial, can be used for identifying different targeting signals, thereby corresponding to different communication system parameters.
The length of PN sequence has determined its spread-spectrum capability in the frame synchronization sequence.The PN sequence has stronger antijamming capability, even under lower signal to noise ratio or stronger interference, when receiving terminal is correlated with despreading, still have higher output valve, that is, higher relevant peaks is arranged.
Carry out in the synchronous process at receiving terminal, with two relevant peaks of two adjacent after sliding correlation method or other method identification despreading frame synchronization sequences, the distance between two relevant peaks is the phase difference of these two frame synchronization sequences.This phase difference has 2 for m rank PN sequence generator polynomial
M-1Plant possibility, and 2
M-1Planting possibility can be corresponding to 2
M-1Plant the parameter combinations of communication system.Through this corresponded manner, communication system carry out synchronous in, can the information of system parameters be passed to receiving terminal.
Figure 10 is the schematic flow sheet that sends the communication system parameter in the embodiment of the invention at transmitting terminal.Referring to Figure 10, this flow process comprises the steps:
It should be noted that transmitting terminal and receiving terminal all pre-configured frame synchronization sequence and communication system parameter between identical corresponding relation, thereby guarantee that receiving terminal can be according to the correct obtaining communication system parameters of frame synchronization sequence.
Figure 11 is the sketch map of transmitting terminal framing in the embodiment of the invention.Shown in figure 11, transmitting terminal is formed signal frame with selected targeting signal and deblocking, and the signal frame of being formed is as shown in Figure 7.
Specify top flow process to n the shared targeting signal of Frame and each Frame with two kinds of situation of a targeting signal respectively below.
Under the situation of n the shared targeting signal of Frame; Targeting signal selects to adopt two frame synchronization sequences; These two frame synchronization sequences adopt similar and different PN sequence; In other words, these two PN sequences are generated by same generator polynomial, but can have different initial phases or same initial phase.
In this case, the signal frame structure of composition is shown in figure 12, and wherein, targeting signal comprises frame synchronization sequence 1 and frame synchronization sequence 2, and the back is a n corresponding Frame of this targeting signal.
Under the situation of each Frame with a targeting signal; Targeting signal selects to adopt 1 frame synchronization sequence; Frame synchronization sequence before the Frame adopts similar and different PN sequence; In other words, the PN sequence before each Frame is generated by same generator polynomial, but can have different initial phases or same initial phase.
In this case, the signal frame structure of composition is shown in figure 12.Wherein, comprise frame synchronization sequence 1, comprise frame synchronization sequence 2 with Frame 2 corresponding targeting signals with Frame 1 corresponding targeting signal ..., the targeting signal corresponding with Frame n comprises frame synchronization sequence n.
The PN sequence is the pseudorandom code sequence that adopts the spread spectrum coding method to obtain, and the most frequently used PN sequence can adopt maximum length linear feedback shift register sequence, i.e. m sequence, and it can be produced by shift register.The initial state that produces the shift register of PN sequence can be provided with, and different initial states can produce different PN sequences, therefore can produce different PN sequences with different initial state settings.
The PN sequence that frame synchronization sequence 1 in the embodiment of the invention can adopt any initial phase to produce forms (is 0000001 like initial phase place), and this sequence is the basic synchronization sequence.Other frame synchronization sequence (frame synchronization sequence 2～frame synchronization sequence n) can adopt the basic synchronization sequence to produce, and also can adopt other initial phases based on identical generator polynomial to produce.
The polynomial PN sequence in 8 rank for example: p (x)=x
8+ x
6+ x
5+ x
1, the length of PN sequence is 255, its producing method is shown in figure 14.In the mode shown in Figure 14, initial condition is set after, through d type flip flop displacement 255 times, can generate length and be 255 PN sequence, this PN sequence can be used for forming frame synchronization sequence.
Process in receiving terminal received communication system parameters is described below.Figure 15 is the schematic flow sheet in receiving terminal received communication system parameters.Referring to Figure 15, this flow process comprises the steps:
Step 201, the signal frame that the receiving terminal receiving end/sending end sends.
Step 202, receiving terminal are discerned in the said signal frame frame synchronization sequence as targeting signal.In the present embodiment, can adopt sliding correlation method or other method seek and the identification signal frame in frame synchronization sequence.
Step 203, identify the frame synchronization sequence in the signal frame after, receiving terminal reads corresponding communication system parameter according to said frame synchronization sequence from the parameter list of preserving corresponding relation between communication system parameter and the frame synchronization sequence.
Corresponding with transmitting terminal, specify top flow process to n the shared targeting signal of Frame and each Frame with two kinds of situation of a targeting signal respectively below.
Under the situation of n the shared targeting signal of Frame; The above-mentioned step that from parameter list, reads corresponding communication system parameter according to frame synchronization sequence comprises: the relevant peaks of two frame synchronization sequences in the detection signal frame; Calculate the relevant peak-to-peak distance of two frame synchronization sequences, from parameter list, read corresponding communication system parameter according to said distance then.
Under the situation of each Frame with a targeting signal; The above-mentioned step that from parameter list, reads corresponding communication system parameter according to frame synchronization sequence comprises: the relevant peaks of frame synchronization sequence in the detection signal frame; Calculate the relevant peak-to-peak distance of frame synchronization sequence in this relevant peaks and the last signal frame, from parameter list, read corresponding communication system parameter according to said distance then.
In both of these case, the corresponding relation in the parameter list is specially the corresponding relation between the distance and communication system parameter between two relevant peaks.
For example, after adopting different initial conditions, the phase difference value of two sequences is the value between the 0-127 for the polynomial PN sequence in 8 rank.Transmitting terminal and receiving terminal are in advance with the combination of corresponding a kind of system parameters respectively of these 128 kinds of possibilities, like the FEC coded system of phase place 0 corresponding 64QAM and 1/2.Through this processing mode, carry out synchronously or during operation such as channel estimating, can confirm the system parameters that Frame adopts in this signal frame simultaneously in system.
Be example with the polynomial frame synchronization sequence in 8 rank below, further specify the phase difference of frame synchronization sequence relevant peaks and the corresponding relation of system parameters.
For adopting the polynomial frame synchronization sequence in 8 rank, the possibility of the phase difference of frame synchronization sequence relevant peaks has 128 kinds, and sliding in removal, the distance back phase difference value between two frame signals can be expressed as 0～127 when relevant.
Therefore the parameter combinations of embodiment of the invention support has 128 kinds.Table 1 is an example of parameter list, and generating the initial condition that adopts in the basic frame synchronization sequence is 0000001, and the initial condition that adopts when generating other frame synchronization sequences is as shown in table 1.
| Phase difference | The initial condition that is provided with | Parameter | |
| 0 | 0 | 0000001 | The QPSK modulation, 1/2 rate convolutional code, frame length 2048, |
| 1 | 1 | 0000010 | The 16QAM modulation, 1/3 rate convolutional code, frame length 2048 |
| ... | ... | ... | |
| 127 | 127 | 1100001 | The 512QAM modulation, 1/5 rate convolutional code, frame length 8192 |
Table 1
Figure 16 is the structural representation that transmitting terminal is used to send the device of communication system parameter in the embodiment of the invention.
Shown in figure 16, this device comprises targeting signal selection module, framing module and sending module.
Wherein, the targeting signal selected cell be used for selecting with the corresponding autocorrelation signal of communication system parameter as targeting signal, and this targeting signal offered the framing module.The framing module is used for this targeting signal and deblocking are formed signal frame together, and signal frame is offered the sending module transmission.Sending module then sends the signal frame that comprises said targeting signal and Frame.
When said autocorrelation signal is frame synchronization sequence; Targeting signal is selected module can comprise judge module and is selected module; Wherein judge module be used for judging be the shared targeting signal of a plurality of Frames or each Frame with a targeting signal, and judged result offered the selection module; Select module to be used under the situation of the shared targeting signal of a plurality of Frames, selecting two frame synchronization sequences as a targeting signal, each Frame with the situation of a targeting signal under frame synchronization sequence of selection as a targeting signal.
Figure 17 is used for the device of received communication system parameters for receiving terminal in the embodiment of the invention.Memory module shown in figure 17, that this device comprises receiver module, identification module, searches module and preserve the above-mentioned parameter table.
Wherein, receiver module is used to receive the signal frame from transmitting terminal, and the signal frame that is received is offered identification module.Identification module is used for discerning the autocorrelation signal of said signal frame as targeting signal, relevant information is offered search module then.Searching module is used for reading corresponding communication system parameter according to the parameter list of preserving from memory module from the autocorrelation signal of identification module.
As previously mentioned, when said autocorrelation signal is frame synchronization sequence, can adopt correlator as identification module, this correlator can adopt sliding correlation method or other method to discern said frame synchronization preface.
When said autocorrelation signal was frame synchronization sequence, the device that receiving terminal is used for the received communication system parameters can have structure shown in figure 18.Wherein, identification module is a correlator, searches module and specifically comprises peak detector, peak memory, distance calculator and lookup unit.
Wherein, storage frame synchronizing sequence relevant peaks and position thereof in the peak memory.Peak detector is used for detecting the relevant peaks of said signal frame synchronizing sequence, with current detection to relevant peaks be saved in the peak memory and offer distance calculator.And distance calculator be used for according to said current detection to relevant peaks and the peak memory last relevant peaks of preserving, calculate the relevant peak-to-peak distance of said two frame synchronization sequences, and this distance offered lookup unit.Lookup unit is used for reading corresponding communication system parameter according to said distance from parameter list.
Specifically, under the situation of the shared targeting signal of a plurality of Frames, peak detector is used for detecting the relevant peaks of two frame synchronization sequences of said signal frame, is saved in said relevant peaks in the peak memory then and offers distance calculator.Two relevant peaks that distance calculator provides according to peak detector are calculated the relevant peak-to-peak distance of these two frame synchronization sequences, and this distance is offered lookup unit.Lookup unit is used for reading corresponding communication system parameter according to said distance from parameter list.
Under the situation of each Frame with a targeting signal, peak detector is used for detecting the relevant peaks of said signal frame frame synchronization sequence, and said relevant peaks is saved in the peak memory and offers distance calculator.The information of frame synchronization sequence relevant peaks in the last signal frame of preserving in relevant peaks that distance calculator provides according to peak detector and the peak memory; Calculate the relevant peak-to-peak distance of frame synchronization sequence in this relevant peaks and the last signal frame, and this distance is offered lookup unit.Lookup unit is used for reading corresponding communication system parameter according to said distance from parameter list.
Under both of these case, the corresponding relation in the parameter list is specially the corresponding relation between the distance and communication system parameter between two relevant peaks.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a method of sending the communication system parameter is characterized in that, this method comprises:
Selection and the corresponding autocorrelation signal of communication system parameter are as targeting signal;
Said targeting signal and Frame are formed signal frame together;
Send said signal frame;
Wherein, Said autocorrelation signal is a frame synchronization sequence; Select to comprise as targeting signal: under the situation of the shared targeting signal of a plurality of Frames with the corresponding frame synchronization sequence of communication system parameter; Select two frame synchronization sequences as a targeting signal, and the distance of said two frame synchronization sequence relevant peaks is corresponding to said communication system parameter; Perhaps, under the situation of each Frame, select a frame synchronization sequence as a targeting signal, and the distance of this frame synchronization sequence relevant peaks and last signal frame synchronizing sequence relevant peaks is corresponding to said communication system parameter with a targeting signal.
2. the method for a received communication system parameters is characterized in that, this method comprises:
Receive signal frame, and discern in the said signal frame autocorrelation signal as targeting signal;
From parameter list, read corresponding communication system parameter according to said autocorrelation signal;
Wherein, Said autocorrelation signal is a frame synchronization sequence; Under the situation of the shared targeting signal of a plurality of Frames, the step that from parameter list, reads corresponding communication system parameter according to frame synchronization sequence comprises: the relevant peaks that detects two frame synchronization sequences in the said signal frame; Calculate the relevant peak-to-peak distance of said two frame synchronization sequences; From parameter list, read corresponding communication system parameter according to said distance.
3. method according to claim 2 is characterized in that, under the situation of each Frame with a targeting signal, the step that from parameter list, reads corresponding communication system parameter according to frame synchronization sequence comprises:
Detect the relevant peaks of frame synchronization sequence in the said signal frame;
Calculate the relevant peak-to-peak distance of frame synchronization sequence in said relevant peaks and the last signal frame;
From parameter list, read corresponding communication system parameter according to said distance.
4. a device that sends the communication system parameter is characterized in that, this device comprises targeting signal selection module, framing module and sending module, wherein:
Said targeting signal select module be used for selecting with the corresponding autocorrelation signal of communication system parameter as targeting signal, and said targeting signal offered the framing module;
Said framing module is used for said targeting signal and Frame are formed signal frame together, and said signal frame is offered sending module;
Said sending module is used to send said signal frame;
Wherein, said autocorrelation signal is a frame synchronization sequence, and said targeting signal selects module to comprise:
Judge module, be used for judging be the shared targeting signal of a plurality of Frames or each Frame with a targeting signal, and judged result offered the selection module;
Select module; Be used under the situation of the shared targeting signal of a plurality of Frames, selecting two frame synchronization sequences as a targeting signal; And the distance of said two frame synchronization sequence relevant peaks is corresponding to said communication system parameter; Select a frame synchronization sequence as a targeting signal at each Frame under with the situation of a targeting signal, and the distance of this frame synchronization sequence relevant peaks and last signal frame synchronizing sequence relevant peaks is corresponding to said communication system parameter.
5. the device of a received communication system parameters is characterized in that, this device comprises receiver module, identification module, searches module and memory module, wherein:
Said memory module is used for the parameter list that storage package contains corresponding relation between autocorrelation signal and the communication system parameter;
Said receiver module is used to receive signal frame, and offers said identification module;
Said identification module is used for discerning the autocorrelation signal of said signal frame as targeting signal;
The said module of searching is used for reading corresponding communication system parameter according to the parameter list that said autocorrelation signal is preserved from said memory module;
Said autocorrelation signal is a frame synchronization sequence; The said module of searching comprises peak detector, peak memory, distance calculator and lookup unit, wherein:
Said peak memory is used to store said frame synchronization sequence relevant peaks and position thereof;
Said peak detector is used for detecting the relevant peaks of said signal frame synchronizing sequence, with current detection to relevant peaks be saved in said peak memory and offer said distance calculator;
Said distance calculator be used for according to said current detection to relevant peaks and the peak memory last relevant peaks of preserving, calculate the relevant peak-to-peak distance of said two frame synchronization sequences, and this distance offered said lookup unit;
Said lookup unit is used for reading corresponding communication system parameter according to said distance from parameter list.
6. the system of a transport communication system parameters; It is characterized in that this system comprises transmitting terminal and receiving terminal, transmitting terminal comprises targeting signal selection module, framing module and sending module; Receiving terminal comprises receiver module, identification module, searches module and memory module, wherein:
Said targeting signal select module be used for selecting with the corresponding autocorrelation signal of communication system parameter as targeting signal, and this targeting signal offered said framing module;
Said framing module is used for this targeting signal and Frame are formed signal frame together, and signal frame is offered said sending module;
Said sending module is used to send said signal frame;
Said memory module is used for the parameter list that storage package contains corresponding relation between autocorrelation signal and the communication system parameter;
Said receiver module is used to receive signal frame, and offers said identification module;
Said identification module is used for discerning the autocorrelation signal of said signal frame as targeting signal;
The said module of searching is used for reading corresponding communication system parameter according to the parameter list that said autocorrelation signal is preserved from said memory module;
Said autocorrelation signal is a frame synchronization sequence; Said targeting signal selects module to comprise:
Judge module, be used for judging be the shared targeting signal of a plurality of Frames or each Frame with a targeting signal, and judged result offered the selection module;
Select module; Be used under the situation of the shared targeting signal of a plurality of Frames, selecting two frame synchronization sequences as a targeting signal; And the distance of said two frame synchronization sequence relevant peaks is corresponding to said communication system parameter; Select a frame synchronization sequence as a targeting signal at each Frame under with the situation of a targeting signal, and the distance of this frame synchronization sequence relevant peaks and last signal frame synchronizing sequence relevant peaks is corresponding to said communication system parameter.
7. system according to claim 6 is characterized in that, the said module of searching comprises peak detector, peak memory, distance calculator and lookup unit, wherein:
Said peak memory is used for storage frame synchronizing sequence relevant peaks and position thereof;
Said peak detector is used for detecting the relevant peaks of said signal frame synchronizing sequence, with current detection to relevant peaks be saved in said peak memory and offer said distance calculator;
Said distance calculator be used for according to said current detection to relevant peaks and the said peak memory last relevant peaks of preserving, calculate the relevant peak-to-peak distance of said two frame synchronization sequences, and this distance offered said lookup unit;
Said lookup unit is used for reading corresponding communication system parameter according to said distance from parameter list.
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| CN102281248B (en) * | 2011-08-26 | 2017-02-01 | 中兴通讯股份有限公司 | Transmission method of basic frame information, base station and terminal |
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