CN102281092B - Signal receiving and treating method in mobile communication and system thereof - Google Patents
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Abstract
The invention discloses a signal receiving and treating method in mobile communication and a system thereof. The signal receiving and treating method in mobile communication comprises the following steps of: receiving a signal; judging whether the received signal contains a valid signal activating region or not according to a preset judging conduction; if so, carrying out signal treatment of a receiving terminal on the signal in the signal activating region; or no-carrying out the signal treatment of the receiving terminal on the received signal. The signal receiving and treating method in mobile communication and the system thereof have the capabilities of improving the signal treating efficiency of the receiving terminal and reducing the waste of treating resources of the receiving terminal and the operation cost of a receiver.
Description
Technical field
The present invention relates to the technical field of mobile communication, relate in particular to method for receiving and processing signal in a kind of mobile communication, and signal receiving processing system in a kind of mobile communication.
Background technology
In mobile communication system, communication process is set up in terminal and base station roughly can be divided into two steps, first completes initial access and carries out data communication again.Current community covers application model and becomes more diverse, and comprising indoor distributing antenna system, covers, and outdoor macro base station covers, the covering of outdoor cell expansion etc.For above-mentioned various replace modes, receiver, all according to traditional processing mode, directly carries out the processing of receiving terminal base band algorithm to all signals that receive, and final settling signal is resolved.Yet this kind of processing mode failed in conjunction with channel circumstance, therefore can not well reduce the computing expense of receiver.And the today of constantly reforming in the communication technology, in face of the increasingly sophisticated reality of receiver algorithm, how effectively reducing receiver computing expense is a very important technical barrier.
First, as described above, in terminal and base station, set up in communication process, first must complete initial access, and in initial access process, because the distance between terminal and base station exists uncertain, that therefore often access slot is drawn is relatively long, to avoid accessing signal, drop on other time slots and impact, under cell extension pattern, access slot is longer by what draw.Yet in fact, in many cases, within the reception period being elongated, may only have certain a bit of signal that carries initial access, other parts in the described reception period being elongated are only being carried lower-powered interference signal, that is echo signal active region only accounts for a part that receives the period.
Secondly, after completing initial access, enter in service communication process, for cell extension pattern, due to the just data of a time slot that the reception period of a plurality of time slots carries, in other words, signal activation district equally only accounts for a part that receives the period.
Again, signal is in mobile communication process, many times, due to reasons such as building block, part time slot arrives after receiving terminal by transmission, and the information that receiving terminal receives is incomplete information, in other words, although receiving terminal receives signal, due to the order of severity of information dropout, part has not had the necessity of resolving.
Finally, for multiaerial system, especially indoor distributing antenna system replace mode, in a lot of situations, because different antennae is shared same baseband pool, but there is larger isolation in different antennae physically, they receive and dispatch the signal in target coverage district separately separately, in this case, for same time slot, how often to exist in several antennas and only have some antenna receptions to signal, other antennas are only carrying lower-powered interference signal, therefore, if other antennas are also carried out receiving terminal to the interference signal receiving and are processed, can cause receiving terminal to process the waste of resource.
As can be seen from the above analysis, for the receiving terminal in mobile communication, in a lot of situations, be not the signal that all reception periods all carries use, the traditional receiver to the received signal unified mode efficiency of processing is lower, causes receiving terminal to process the waste of resource.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of signal treatment effeciency that can improve receiving terminal, method for receiving and processing signal in the mobile communication of the waste of reduction receiving terminal processing resource.
A method for receiving and processing signal in mobile communication, comprises the following steps:
Receive signal;
Detect described reception signal swash ripple position and under climb ripple position, according to the original position in signal activation district described in the ripple location positioning that swashes of described reception signal, according to the final position of climbing signal activation district described in ripple location positioning under described reception signal, and according to described original position and described final position, calculate the length in described signal activation district;
Whether the length in more described signal activation district is greater than or equal to default reference length value;
If so the signal that, judgement receives comprises effective signal activation district; Otherwise the signal that judgement receives does not comprise effective signal activation district;
If the signal receiving comprises effective signal activation district, the signal in Ze Dui signal activation district is carried out the signal of receiving terminal and is processed; Otherwise, the signal receiving is not carried out to the signal of receiving terminal and processed, wherein, the signal of described receiving terminal is processed and is comprised that access is synchronous, channel estimating, equalizing demodulation and channel-decoding.
Compared with prior art, in mobile communication of the present invention, first method for receiving and processing signal utilizes default Rule of judgment to judge whether to comprise effective signal activation district to the signal receiving, if there is no effective signal activation district, illustrate that the signal receiving is not useful signal, therefore do not carry out and process to the received signal; If comprise effective signal activation district, the signal receiving comprises useful signal, but only having the signal in described effective signal activation district is to carry useful signal, and other parts may be to disturb, may be the data of having damaged loss, may be also redundancy reception area, carrying invalid signals, therefore, only the signal in described effective signal activation district is carried out the signal processing of receiving terminal.Due to the signal receiving has been carried out to screening, then carry out signal processing, greatly improve the signal treatment effeciency of receiving terminal, reduce the waste that receiving terminal is processed resource, reduce the computing expense of receiver.
The technical problem to be solved in the present invention is also to provide a kind of signal treatment effeciency that can improve receiving terminal, signal receiving processing system in the mobile communication of the waste of reduction receiving terminal processing resource.
A signal receiving processing system in mobile communication, comprising:
Receiver module, for receiving signal;
Active region computing module, detect described reception signal swash ripple position and under climb ripple position, according to the original position in signal activation district described in the ripple location positioning that swashes of described reception signal, according to the final position of climbing signal activation district described in ripple location positioning under described reception signal, and according to described original position and described final position, calculate the length in described signal activation district;
Whether validity judge module, be greater than or equal to default reference length value for the length in more described signal activation district; If so the signal that, judgement receives comprises effective signal activation district; Otherwise the signal that judgement receives does not comprise effective signal activation district;
Processing module, comprises effective signal activation district for the signal receiving, and the signal in described signal activation district is carried out the signal processing of receiving terminal; Otherwise, the signal receiving is not carried out to the signal of receiving terminal and processed, wherein, the signal of described receiving terminal is processed and is comprised that access is synchronous, channel estimating, equalizing demodulation and channel-decoding.
Compared with prior art, in mobile communication of the present invention in signal receiving processing system, first described anticipation module utilizes default Rule of judgment to judge whether to comprise effective signal activation district to the signal receiving, if there is no effective signal activation district, illustrate that the signal receiving is not useful signal, therefore described processing module is not carried out and is processed to the received signal; If comprise effective signal activation district, the signal receiving comprises useful signal, but only having the signal in described effective signal activation district is to carry useful signal, and other parts may be to disturb, may be the data of having damaged loss, may be also redundancy reception area, carrying invalid signals, therefore, described processing module is only carried out the signal processing of receiving terminal to the signal in described effective signal activation district.Owing to first the signal receiving having been carried out to screening, then carry out signal processing, greatly improve the signal treatment effeciency of receiving terminal, reduce the waste that receiving terminal is processed resource, reduce the computing expense of receiver.
Utilize method for receiving and processing signal and system thereof in mobile communication of the present invention, for terminal and base station, set up in the initial access process in communication process, can be by access signal be screened, with the Rule of judgment of presetting, define signal activation district, only for signal activation district, detect, with this, reduce the computing expense of receiver; In service communication process, can with the Rule of judgment of presetting, define signal activation district by screening to received signal equally, only for signal activation district, detect, with this, reduce the computing expense of receiver; For the signal of the loss receiving in communication process, incompleteness, can reject the signal of described loss, incompleteness by screening to received signal equally, do not resolve, with this, reduce the computing expense of receiver; For the interference signal of other antennas that receive in multiaerial system, the signal that can signal strength signal intensity be required lower than sensitivity by default Rule of judgment is rejected away, only processes the signal of the antenna activating, and with this, reduces the computing expense of receiver.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of method for receiving and processing signal in mobile communication of the present invention;
Fig. 2 is the flow chart of a kind of preferred implementation of the step S102 of method for receiving and processing signal in mobile communication of the present invention;
Fig. 3 be in mobile communication of the present invention method for receiving and processing signal at the schematic diagram of communication system applications;
Fig. 4 is the UpPCH search window schematic diagram in TD-SCDMA system;
Fig. 5 is the waveform schematic diagram of an input stimulus;
Fig. 6 is the structural representation of signal receiving processing system in mobile communication of the present invention;
The structural representation of a kind of preferred implementation of signal receiving processing system in Fig. 7 mobile communication of the present invention;
The structural representation of the another kind of preferred implementation of signal receiving processing system in Fig. 8 mobile communication of the present invention.
Embodiment
Below in conjunction with accompanying drawing, method for receiving and processing signal and treatment system thereof in mobile communication of the present invention are described further.
Refer to Fig. 1, Fig. 1 is the flow chart of steps of method for receiving and processing signal in mobile communication of the present invention.
Method for receiving and processing signal in described mobile communication, comprises the following steps:
Step S101, receives signal;
Step S102, receives signal according to default Rule of judgment judgement and whether comprises effective signal activation district; If so, perform step S103, otherwise execution step S104;
Step S103, carries out the signal of receiving terminal and processes to the signal in signal activation district;
Step S104, does not carry out the signal of receiving terminal and processes to the signal receiving.
Compared with prior art, in mobile communication of the present invention, first method for receiving and processing signal utilizes default Rule of judgment to judge whether to comprise effective signal activation district to the signal receiving, if there is no effective signal activation district, illustrate that the signal receiving is not useful signal, therefore do not carry out and process to the received signal; If comprise effective signal activation district, the signal receiving comprises useful signal, but only having the signal in described effective signal activation district is to carry useful signal, and other parts may be to disturb, may be the data of having damaged loss, therefore, only the signal in described effective signal activation district is carried out the signal processing of receiving terminal.Due to the signal receiving has been carried out to screening, then carry out signal processing, greatly improve the signal treatment effeciency of receiving terminal, reduce the waste that receiving terminal is processed resource, reduce the computing expense of receiver.
For step S101, described reception signal can be that terminal is set up the access signal in the initial access process of communicating by letter with base station, can be also the business datum in service communication process; Both comprise the reception signal in single antenna covering system, also comprised the reception signal in multiaerial system.
For step S102, described default Rule of judgment can be default power threshold, can be also the length value of default valid data, or the combination of a plurality of Rule of judgment etc.
See also Fig. 2, the flow chart of a kind of preferred implementation of the step S102 of method for receiving and processing signal in Fig. 2 mobile communication of the present invention.
In the present embodiment, in step S102 according to default activation threshold power value and effectively the preset reference length value of active region as anticipation condition, screen to received signal.In step S102, according to following step judgement, receive signal and whether comprise effective signal activation district:
S21, adds up the power of described reception signal;
S22, the power of more described reception signal and default activation threshold power value;
S23, if the power of described reception signal is less than described default activation threshold power value, the signal that judgement receives does not comprise signal activation district;
S24, if the power of described reception signal is greater than or equal to described default activation threshold power value, the signal that judgement receives comprises signal activation district, further performs step S25 to S27;
S25, detect described reception signal swash ripple position and under climb ripple position;
S26, according to the original position in signal activation district described in the ripple location positioning that swashes of described reception signal, according to the final position of climbing signal activation district described in ripple location positioning under described reception signal, and according to described original position and described final position, calculate the length in described signal activation district;
S27, whether the length in more described signal activation district is greater than or equal to default reference length value; If so, the signal that judgement receives comprises effective signal activation district, execution step S103; Otherwise the signal that judgement receives does not comprise effective signal activation district, execution step S104.
In the present embodiment, first by described activation threshold power value judgement, receive signal and whether have signal activation district, if power is lower than described activation threshold power value, illustrate that signal may be interference signal or the signal having lost, damaged, cannot therefrom obtain useful signal, therefore for the direct rejecting that there is no described signal activation district.Then, for existing the access signal in signal activation district further original position and the final position in described signal activation district to be subtracted each other, calculate the length in described signal activation district, recycle default reference length value and judge that whether described signal activation district is effective, if invalid, explanation receives the signal activation section length deficiency of signal, and it may be the signal of partial loss, damage, therefore these signals is rejected equally.And for the reception signal with effective signal activation district, by original position and the final position in described signal activation district, execution step S103, carries out the signal of receiving terminal and processes to the signal in signal activation district.Improve the signal treatment effeciency of receiving terminal, reduce the waste that receiving terminal is processed resource.
For step S21, can calculate in accordance with the following methods the power that receives signal:
According to formula statistics, receive the power of signal:
Wherein, described y (i) is for receiving signal, and L is for receiving the length of signal, P
receivefor receiving the power of signal.
For step S22, described activation threshold power value can be set according to concrete system requirements.For example, for business burst, it is that receiver reference sensitivity subtracts the received power that 3dB is corresponding that described activation threshold power value is preferably set.
For step S25, can by following step detect described reception signal swash ripple position and under climb ripple position:
First, to there is the power Chuan Wei unit segmentation of predetermined length, calculate the power of each segmentation of described reception signal;
Secondly, according to the order successively identical with signal reception time, calculate successively ratio or the difference of the signal power of every two adjacent described power windows, calculating corresponding signal location when obtaining described ratio or difference and reaching maximum is the ripple position of swashing of described reception signal;
And, according to the order successively contrary with signal reception time, calculate successively ratio or the difference of the signal power of every two adjacent described power windows, calculate corresponding signal location when obtaining described ratio or difference and reaching maximum and be described reception signal under climb ripple position.
The above-mentioned ripple position of swashing is the fastest signal location of signal strength signal intensity rising, is therefore to receive the starting point of carrying useful signal in signal, the starting point using it as described signal activation district; Under to climb ripple position be the intensity the fastest signal location that declines, be therefore to receive the terminating point that carries useful signal in signal, the terminating point using it as described signal activation district.Clear and definite by the way position and the scope in signal activation district, and then can carry out to received signal Screening Treatment, improve the treatment effeciency of signal receiving end.
Wherein, the signal power in described power window can be calculated according to following formula:
Wherein, described y (i) is reception signal, the original position that k is k power window, and win_len is power window length, P
kit is the performance number of k power window.
, ratio or the difference of the signal power of described two adjacent described power windows are expressed as successively:
Ratio:
Or difference: Pise_ α
k=P
k+D-P
k
Wherein, Rise_ α
kbe called and climb the ripple factor, when its value reaches maximum, if computing according to the identical order of signal reception time, the ripple position of swashing of corresponding described reception signal; If computing is according to the contrary order of signal reception time, corresponding described reception signal under climb ripple position.The typical value of described numerical value D is preferably GP length corresponding in various communication standards, and under single-time sampling rate, in GSM/EDGE, its value is in 8, TD-SCDMA, and its value is 16.
By the computing of described power window, can carry out segmentation calculating to the power of described reception signal, make result of calculation more accurate, be convenient to calculate exactly position and the length in described signal activation district.
For step S26, described in swash ripple position and described under climb ripple position and can represent with concrete Data Position or moment point.
The ripple moment point of supposing to swash is designated as T
rise_edge, under climb ripple moment point be designated as T
fall_edge, by T
rise_edgeto T
fall_edgereception signal be defined as signal activation district, in order to express conveniently, the original position by signal activation district (is designated as Position
active_start) and signal activation section length (be designated as Len
active) define the category of active region so Position
active_startvalue be T
rise_edge, Len
activevalue be (T
fall_edge-T
rise_edge+ 1).
As a kind of preferred implementation, for initial access signal, described reference length value is made as 80% of corresponding outburst type ideal length; For business burst, described reference length value is made as the length that training sequence length adds half accidental loads.
In step S103, the signal of the receiving terminal that the signal in signal activation district is carried out is processed and is comprised that access is synchronous, channel estimating, equalizing demodulation, channel-decoding etc.
Another kind of preferred implementation as the step S102 of method for receiving and processing signal in mobile communication of the present invention, can be only preset reference length value by effective signal activation district is set as anticipation condition, directly carry out to received signal the screening of signal activation district validity.That is in described step S102, directly carry out S25 to S27, and do not carry out S21 to S24:
S25, detect described reception signal swash ripple position and under climb ripple position, according to the original position in signal activation district described in the ripple location positioning that swashes of described reception signal, according to the final position of climbing signal activation district described in ripple location positioning under described reception signal, and according to described original position and described final position, calculate the length in described signal activation district;
S26, whether the length in more described signal activation district is greater than or equal to default reference length value;
S27, if so, the signal that judgement receives comprises effective signal activation district; Otherwise the signal that judgement receives does not comprise effective signal activation district.
Another kind of execution mode as method for receiving and processing signal in mobile communication of the present invention, directly carry out to received signal the screening of signal activation district validity, can reduce the calculation step of receiving terminal, further reduction takies the processing resource of receiving terminal, improves receiving terminal treatment effeciency to received signal.
Below in conjunction with instantiation, the present invention is further elaborated.Should be appreciated that instantiation described herein, only in order to explain the present invention, is not intended to limit the present invention.
It is synchronously background that this example be take the initial access of TD-SCDMA, sets forth the implementation process of the art of this patent.
In communication system, the roughly operation principles of transceiver as shown in Figure 3.Signal is first moved target frequency by up-conversion after coding, the mapping that interweaves, modulation, finally send, after transmission, receiving terminal carries out inverse operation, first complete down-conversion, then the data after down-conversion are carried out to synchronous or channel estimating, equalizing demodulation, deinterleaving, decoding, finally recover initial data.
After application receiving end signal treatment technology of the present invention, data after down-conversion are carried out to Screening Treatment, by the Rule of judgment of presetting, come clear and definite signal activation district, then the signal in described signal activation district is carried out to the processing of receiving terminal algorithm.Reject described signal activation district signal in addition and process, thereby finally reduce receiving terminal computing expense.
In TD-SCDMA system; mobile phone completes after down-going synchronous with base station; by realizing uplink synchronous to base station transmitting UpPCH; in mobile phone and base station down synchronizing process; may there is deviation in the estimation of synchronization timing and path loss; cause up delivery time point and have deviation with reference to moment point; in other words; the time of the UpPCH arrival network side of mobile phone may be than shifting to an earlier date with reference to moment point; also may lag behind, therefore, in TD-SCDMA frame structure; before and after UpPTS, all there is GP protection, prevent that UpPCH from dropping on other time slots system is caused to unnecessary interference.Network side, in order to cover expansion and to disturb controlledly online, increases UpPCH shifting pattern in part scene, and under this pattern, the protection of UpPCH is drawn longlyer, specifically as shown in Figure 4.
Fig. 5 is an input stimulus for the supposition of this example, and general introduction below utilizes the processing procedure of technology of the present invention to this input stimulus.
Step 1: the data that receive respectively two antennas bringing from front end;
Step 2: judge according to default Rule of judgment whether the reception signal of two antennas comprises effective signal activation district respectively; Concrete steps are as follows:
Step 2.1: initialization activates threshold power value P
thresholdfor reference sensitivity subtracts the corresponding received power value (threshold power in corresponding diagram 5, i.e. " horizontal line " identification division) of 3dB, the effective preset reference length value L en in signal activation district
referencebe 100;
Step 2.2: add up successively the power of two antennas, the received power of antenna 0, is designated as P
receive_ant0, the received power of antenna 1, is designated as P
receive_ant1.Obtain: the received power of antenna 0 is greater than described activation threshold power value, i.e. P
receive_ant0>P
threshold, and the received power of antenna 1 is less than described activation threshold power value, i.e. P
receive_ant1<P
threshold, as shown in Figure 5; Therefore judge that the reception signal of antenna 1 does not comprise signal activation district, without the data of processing antenna 1, therefore, follow-up needs the data of processing antenna 0 just passable;
Step 2.3: detect antenna 0 and receive swashing of signal and climb ripple moment point under involving, by the calculative determination ripple moment point T that swashes
rise_edge_ant0be 42, under climb ripple moment point T
fall_edge_ant0be 180, so the original position Position in described signal activation district
active_start_ant0be 42, the length L en in described signal activation district
active_ant0be 139, as shown in Figure 5;
Step 3: for antenna 0, its signal activation district is 42 to 180 reception period, therefore, now only need carry out related operation to the data of this period, determine the match peak of each synchronous code, finally, the peak value of each yard number and coupling, the timing that peak value is corresponding is exported in the lump, completes this receiving end signal and processes.
In this example, by determining quantitative analysis, can obtain: according to traditional way, complete this initial synchronisation, need the complex operation number of times of carrying out to be: (detection window number) * 128,2 (double antenna) * 8 (8 synchronous codes) * 992 (detection window is long)=2031616 times.And the method for employing this patent, complex operation number of times is that 1 (wherein an antenna does not have signal, without computing) * 8 (detection window number) * 128, (8 synchronous codes) * 139 (detection window is long)=142336 times, operand is only 7% of traditional method, it serves to show that the present invention can reduce the computing expense of receiver effectively.It should be noted that method of the present invention be applicable to any with time be divided in basic communication standard.
Refer to Fig. 6, Fig. 6 is the structural representation of signal receiving processing system in mobile communication of the present invention.
Signal receiving processing system in described mobile communication, comprising:
Receiver module 31, for receiving signal;
Whether anticipation module 32, comprise effective signal activation district for receiving signal according to default Rule of judgment judgement;
Processing module 33, while comprising effective signal activation district for receiving signal in described anticipation module 32 judgements, carries out the signal of receiving terminal and processes to the signal in described signal activation district; When described anticipation module 32 judgement reception signals do not comprise effective signal activation district, the signal receiving is not carried out to the signal of receiving terminal and processed.
Compared with prior art, in mobile communication of the present invention in signal receiving processing system, first described anticipation module utilizes default Rule of judgment to judge whether to comprise effective signal activation district to the signal receiving, if there is no effective signal activation district, illustrate that the signal receiving is not useful signal, therefore described processing module is not carried out and is processed to the received signal; If comprise effective signal activation district, the signal receiving comprises useful signal, but only having the signal in described effective signal activation district is to carry useful signal, and other parts may be to disturb, may be the data of having damaged loss, therefore, described processing module is only carried out the signal processing of receiving terminal to the signal in described effective signal activation district.Owing to first the signal receiving having been carried out to screening, then carry out signal processing, greatly improve the signal treatment effeciency of receiving terminal, reduce the waste that receiving terminal is processed resource, reduce the computing expense of receiver.
Wherein, the reception signal of described receiver module 31 can be that terminal is set up the access signal in the initial access process of communicating by letter with base station, can be also the business datum in service communication process; Both comprise the reception signal in single antenna covering system, also comprised the reception signal in multiaerial system.
Default Rule of judgment in described anticipation module 32 can be default power threshold, can be also the length value of default valid data, or the combination of a plurality of Rule of judgment etc.
See also Fig. 7, the structural representation of a kind of preferred implementation of signal receiving processing system in Fig. 7 mobile communication of the present invention.
In this preferred implementation, described anticipation module 32 comprises:
Power computation module 321, for adding up the power of described reception signal;
Whether active region judge module 322, be more than or equal to default activation threshold power value for the power of more described reception signal; If so the signal that, judgement receives comprises signal activation district; If not, the signal that judgement receives does not comprise signal activation district;
Active region computing module 323, while comprising signal activation district for the signal receiving in the judgement of described active region judge module, detect described reception signal swash ripple position and under climb ripple position, according to the original position in signal activation district described in the ripple location positioning that swashes of described reception signal, according to the final position of climbing signal activation district described in ripple location positioning under described reception signal, and according to described original position and described final position, calculate the length in described signal activation district;
Whether validity judge module 324, be greater than or equal to default reference length value for the length in more described signal activation district; If so the signal that, judgement receives comprises effective signal activation district; Otherwise the signal that judgement receives does not comprise effective signal activation district.
In the present embodiment, first by 322 judgements of described active region judge module, receive signal and whether have signal activation district, if power is lower than described activation threshold power value, illustrate that signal may be interference signal or the signal having lost, damaged, cannot therefrom obtain useful signal, therefore for the direct rejecting that there is no described signal activation district.Then, described active region computing module 323, for existing the access signal in signal activation district further original position and the final position in described signal activation district to be subtracted each other, calculates the length in described signal activation district.The default reference length value of described validity judge module 324 recycling judges that whether described signal activation district is effective, if invalid, explanation receives the signal activation section length deficiency of signal, and it may be the signal of partial loss, damage, therefore these signals is rejected equally.And for the reception signal with effective signal activation district, by original position and the final position in described signal activation district, make the signal of the signal execution receiving terminal in described processing module 33Dui signal activation district process.Improve the signal treatment effeciency of receiving terminal, reduce the waste that receiving terminal is processed resource.
Described power computation module 321 can receive according to following formula statistics the power of signal:
Wherein, described y (i) is for receiving signal, and L is for receiving the length of signal, P
receivefor receiving the power of signal.
Described activation threshold power value in described active region judge module 322 can be set according to concrete system requirements.For example, for business burst, it is that receiver reference sensitivity subtracts the received power that 3dB is corresponding that described activation threshold power value is preferably set.
Further, described active region computing module 323 preferably includes following computing module:
Power window computing module, for calculating the power of each segmentation of described reception signal to have the power Chuan Wei unit segmentation of predetermined length;
The ripple position computation module of swashing, for the order according to successively identical with signal reception time, calculate successively ratio or the difference of the signal power of every two adjacent described power windows, calculating corresponding signal location when obtaining described ratio or difference and reaching maximum is the ripple position of swashing of described reception signal;
Under climb ripple position computation module, for the order according to successively contrary with signal reception time, calculate successively ratio or the difference of the signal power of every two adjacent described power windows, calculate corresponding signal location when obtaining described ratio or difference and reaching maximum and be described reception signal under climb ripple position.
The above-mentioned ripple position of swashing is the fastest signal location of signal strength signal intensity rising, is therefore to receive the starting point of carrying useful signal in signal, the starting point using it as described signal activation district; Under to climb ripple position be the intensity the fastest signal location that declines, be therefore to receive the terminating point that carries useful signal in signal, the terminating point using it as described signal activation district.Clear and definite by the way position and the scope in signal activation district, and then can carry out to received signal Screening Treatment, improve the treatment effeciency of signal receiving end.
Wherein, described power window computing module can calculate according to following formula the signal power in described power window:
Wherein, described y (i) is reception signal, the original position that k is k power window, and win_len is power window length, P
kit is the performance number of k power window.
, described in swash ripple position computation module and described under climb in ripple position computation module, ratio or the difference of the signal power of two adjacent described power windows are expressed as successively:
Ratio:
Or difference: Rise_ α
k=P
k+D-P
k
Wherein, Rise_ α
kbe called and climb the ripple factor, when its value reaches maximum, if computing according to the identical order of signal reception time, the ripple position of swashing of corresponding described reception signal; If computing is according to the contrary order of signal reception time, corresponding described reception signal under climb ripple position.The typical value of described numerical value D is preferably GP length corresponding in various communication standards, and under single-time sampling rate, in GSM/EDGE, its value is in 8, TD-SCDMA, and its value is 16.
By the computing of described power window, can carry out segmentation calculating to the power of described reception signal, make result of calculation more accurate, be convenient to calculate exactly position and the length in described signal activation district.
Described swash ripple position and described under climb ripple position and can represent with concrete Data Position or moment point.The ripple moment point of supposing to swash is designated as T
rise_edge, under climb ripple moment point be designated as T
fall_edge, by T
rise_edgeto T
fall_edgereception signal be defined as signal activation district, in order to express conveniently, the original position by signal activation district (is designated as Position
active_start) and signal activation section length (be designated as Len
active) define the category of active region so Position
active_startvalue be T
rise_edge, Len
activevalue be (T
fall_edge-T
rise_edge+ 1).
As a kind of preferred implementation, for initial access signal, described reference length value is made as 80% of corresponding outburst type ideal length; For business burst, described reference length value is made as the length that training sequence length adds half accidental loads.
The signal of the receiving terminal that the signal in described processing module 33Dui signal activation district is carried out is processed and is comprised that access is synchronous, channel estimating, equalizing demodulation, channel-decoding etc.
See also Fig. 8, the structural representation of the another kind of preferred implementation of signal receiving processing system in Fig. 8 mobile communication of the present invention.
In the present embodiment, in described mobile communication, the described anticipation module 32 of signal receiving processing system can only include:
Active region computing module 323, for detection of described reception signal swash ripple position and under climb ripple position, according to the original position in signal activation district described in the ripple location positioning that swashes of described reception signal, according to the final position of climbing signal activation district described in ripple location positioning under described reception signal, and according to described original position and described final position, calculate the length in described signal activation district;
Whether validity judge module 324, be greater than or equal to default reference length value for the length in more described signal activation district; If so the signal that, judgement receives comprises effective signal activation district; Otherwise the signal that judgement receives does not comprise effective signal activation district.
That is, the preset reference length value in effective signal activation district is only set as anticipation condition, directly carry out to received signal the screening of signal activation district validity.
In present embodiment, directly carry out to received signal the screening of signal activation district validity, can reduce the computing of receiving terminal, further reduction takies the processing resource of receiving terminal, improves receiving terminal treatment effeciency to received signal.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection range of the present invention.
Claims (8)
1. a method for receiving and processing signal in mobile communication, is characterized in that comprising the following steps:
Receive signal;
Detect described reception signal swash ripple position and under climb ripple position, according to the original position in signal activation district described in the ripple location positioning that swashes of described reception signal, according to the final position of climbing signal activation district described in ripple location positioning under described reception signal, and according to described original position and described final position, calculate the length in described signal activation district;
Whether the length in more described signal activation district is greater than or equal to default reference length value;
If so the signal that, judgement receives comprises effective signal activation district; Otherwise the signal that judgement receives does not comprise effective signal activation district;
If the signal receiving comprises effective signal activation district, the signal in Ze Dui signal activation district is carried out the signal of receiving terminal and is processed; Otherwise, the signal receiving is not carried out to the signal of receiving terminal and processed, wherein, the signal of described receiving terminal is processed and is comprised that access is synchronous, channel estimating, equalizing demodulation and channel-decoding.
2. method for receiving and processing signal in mobile communication as claimed in claim 1, is characterized in that, after receiving signal, first carries out following steps:
Add up the power of described reception signal;
The power of more described reception signal and default activation threshold power value;
If the power of described reception signal is less than described default activation threshold power value, the signal that judgement receives does not comprise signal activation district;
If the power of described reception signal is greater than or equal to described default activation threshold power value, the signal that judgement receives comprises signal activation district.
3. method for receiving and processing signal in mobile communication as claimed in claim 2, is characterized in that, in the step of the power of described statistics reception signal, calculates the power that receives signal according to following formula:
Wherein, described y (i) is for receiving signal, and L is for receiving the length of signal, P
receivefor receiving the power of signal.
4. method for receiving and processing signal in the mobile communication as described in claim 1,2 or 3, is characterized in that, detect described reception signal swash ripple position and under climb ripple position step comprise:
To there is the power Chuan Wei unit segmentation of predetermined length, calculate the power of each segmentation of described reception signal;
According to the order successively identical with signal reception time, calculate successively ratio or the difference of the signal power of every two adjacent described power windows, calculating corresponding signal location when obtaining described ratio or difference and reaching maximum is the ripple position of swashing of described reception signal;
And, according to the order successively contrary with signal reception time, calculate successively ratio or the difference of the signal power of every two adjacent described power windows, calculate corresponding signal location when obtaining described ratio or difference and reaching maximum and be described reception signal under climb ripple position.
5. method for receiving and processing signal in mobile communication as claimed in claim 4, is characterized in that, according to following formula, calculates the signal power in described power window:
Wherein, described y (i) is reception signal, the original position that k is k power window, and win_len is power window length, P
kit is the performance number of k power window.
6. a signal receiving processing system in mobile communication, is characterized in that comprising:
Receiver module, for receiving signal;
Active region computing module, detect described reception signal swash ripple position and under climb ripple position, according to the original position in signal activation district described in the ripple location positioning that swashes of described reception signal, according to the final position of climbing signal activation district described in ripple location positioning under described reception signal, and according to described original position and described final position, calculate the length in described signal activation district;
Whether validity judge module, be greater than or equal to default reference length value for the length in more described signal activation district; If so the signal that, judgement receives comprises effective signal activation district; Otherwise the signal that judgement receives does not comprise effective signal activation district;
Processing module, while comprising effective signal activation district for the signal receiving, carries out the signal processing of receiving terminal to the signal in described signal activation district; Otherwise, the signal receiving is not carried out to the signal of receiving terminal and processed, wherein, the signal of described receiving terminal is processed and is comprised that access is synchronous, channel estimating, equalizing demodulation and channel-decoding.
7. signal receiving processing system in mobile communication as claimed in claim 6, is characterized in that, also comprises:
Power computation module, for adding up the power of described reception signal;
Whether active region judge module, be more than or equal to default activation threshold power value for the power of more described reception signal; If so the signal that, judgement receives comprises signal activation district; If not, the signal that judgement receives does not comprise signal activation district.
8. signal receiving processing system in the mobile communication as described in claim 6 or 7, is characterized in that, described active region computing module comprises:
Power window computing module, for calculating the power of each segmentation of described reception signal to have the power Chuan Wei unit segmentation of predetermined length;
The ripple position computation module of swashing, for the order according to successively identical with signal reception time, calculate successively ratio or the difference of the signal power of every two adjacent described power windows, calculating corresponding signal location when obtaining described ratio or difference and reaching maximum is the ripple position of swashing of described reception signal;
Under climb ripple position computation module, for the order according to successively contrary with signal reception time, calculate successively ratio or the difference of the signal power of every two adjacent described power windows, calculate corresponding signal location when obtaining described ratio or difference and reaching maximum and be described reception signal under climb ripple position.
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| CN101312368A (en) * | 2007-05-25 | 2008-11-26 | 鼎桥通信技术有限公司 | Method and apparatus detecting no signal sub-frame |
| CN101553023A (en) * | 2008-04-04 | 2009-10-07 | 日立通讯技术株式会社 | Base station equipment |
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| CN101026389A (en) * | 2007-01-24 | 2007-08-29 | 北京天碁科技有限公司 | Mobile termina and its processing method |
| CN101312368A (en) * | 2007-05-25 | 2008-11-26 | 鼎桥通信技术有限公司 | Method and apparatus detecting no signal sub-frame |
| CN101553023A (en) * | 2008-04-04 | 2009-10-07 | 日立通讯技术株式会社 | Base station equipment |
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