CN102098717A - Method and device for detecting rotation angle and SCPIR by VAMOS user equipment - Google Patents
Method and device for detecting rotation angle and SCPIR by VAMOS user equipment Download PDFInfo
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- CN102098717A CN102098717A CN200910252184XA CN200910252184A CN102098717A CN 102098717 A CN102098717 A CN 102098717A CN 200910252184X A CN200910252184X A CN 200910252184XA CN 200910252184 A CN200910252184 A CN 200910252184A CN 102098717 A CN102098717 A CN 102098717A
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Abstract
The invention discloses a method and device for detecting a rotation angle and an SCPIR (Sub Channel Power Imbalance Ratio) by VAMOS (Voice services over Adaptive Multi-user channels on One Slot) user equipment. In the invention, the rotation angle is detected and verified by the user equipment by utilizing the rotation angle of a GSM (Global System for Mobile Communications) downlink signal and the limit that whether two user Alpha-QPSK downlink modulation signals satisfy the minimum peak-to-average power ratio or not. In the invention, a burst rotation angle and an SCPIR value can be detected by the user equipment without notifying the user equipment by the base station via a signaling so that the signaling overhead is saved; at the same time, the accuracy of the detection is further ensured by verifying whether the SCPIR and an alpha value satisfy the minimum peak-to-average power ratio or not.
Description
Technical field
The present invention relates to the detection technique in the gsm wireless communications field, relate in particular to a kind of VAMOS (Voice services over Adaptive Multi-user Channels on One Slot, the voice service of the adaptive a plurality of subscriber channels of carrying on time slot) the subscriber equipment burst anglec of rotation detect and sub-channel power than (Sub Channel Power Imbalance Ratio, the SCPIR) method of Jian Ceing.
Background technology
Along with the cost of wireless telecommunications is more and more lower, the user is more and more, causes the demand of wireless telecommunications increasing, and corresponding wireless telecommunications frequency spectrum resource becomes bottleneck gradually.Be faced with the pressure of very severe raising user capacity for the whole world most widely used radio communication standard GSM.In order to alleviate the frequency spectrum pressure of GSM, improve the availability of frequency spectrum, the VAMOS technology has been proposed, also once be called MUROS (Multi-UserReusing One Slot) technology.Two users of VAMOS technical support are time slot of shared same frequency simultaneously.Under the situation that does not increase frequency spectrum and time slot, the availability of frequency spectrum can be promoted one times.The VAMOS technology both can be applied to full rate (FULL RATE) voice also can be applied to half rate (HALF RATE) voice, the number of users of supporting can be doubled on both bases.Descending α-QPSK the technology that adopted of VAMOS technology, last behavior MU-MIMO (Multi-User Multiple Input Multiple Output, multi-user's multiple-input and multiple-output) technology.Fig. 1 is the shared time slot schematic diagrames of VAMOS two users.The VAMOS technology is just becoming the emphasis of GSM technical research at present.
Adopt the subscriber equipment of VAMOS technology can compatible old GSM user, also can adopt more senior receiver to improve the performance of input.Two users of a shared time slot are called the pairing user.Each user among two users of pairing has an independent user receiver.Receiver user can be received two users' of pairing signal, but the signal that only comprises this user for each receiver user is only the signal of final needs, another one pairing user's signal may be done demodulation at receiver, but makes discard processing in follow-up decoding part branch.In order to make full use of the ability that VAMOS promotes capacity, at least one user supports SAIC senior receivers such as (Single AntennaInterference Cancellation, single antenna interference eliminated) among two users that needs are multiplexing or title matches.The channel that VAMOS takies two CUs of identical time slot is called two subchannels.For restituted signal accurately, senior joint detection receiver need detect the power ratio SCPIR of two subchannels that take identical time slot.In order to reduce signaling consumption, 3GPP TR45.914 suggestion detects SCPIR voluntarily by subscriber equipment.In order to reduce the requirement of down transmitting power, TR45.914 proposes to select according to user's power ratio tolerance α (Alpha) value the anglec of rotation of downstream signal simultaneously, and α is the arctan function value of two user power ratios of pairing.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method that a kind of VAMOS subscriber equipment burst anglec of rotation detects and SCPIR detects.Be used for subscriber equipment and realize that the anglec of rotation detects and the detection of SCPIR, and then provide realization possible for advanced person's joint detection receiver.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of VAMOS subscriber equipment detects the method for the anglec of rotation, and this method comprises:
Subscriber equipment utilizes VAMOS two pairing user's downstream signal anglecs of rotation and sub-channel power to detect and the checking anglec of rotation and sub-channel power ratio than the restrictive condition that (SCPIR) satisfies the minimum peak average specific, and described detection and checking are specially:
A, the anglec of rotation that two pairing users are carried out training sequence respectively detect, and obtain two pairing users' the anglecs of rotation;
B, calculate two pairing users' SCPIR according to obtained two pairing users' rotation angle value;
Whether C, the described SCPIR of checking and the described anglec of rotation satisfy the requirement of minimum peak average specific, then are proved to be successful if satisfy.
Further, comprise also before the described steps A that two pairing users' transmitter module detects step, be specially:
Judge that respectively whether two pairing users enter discontinuous emission (DTX) pattern, all do not enter the DTX pattern as if two pairing users, then execution in step A.
Further, the method for the acquisition user anglec of rotation is specially in the steps A:
A1, in the received signal window, extract training sequence part;
A2, adopt the mode of least mean-square error to calculate the signal to noise ratio (SIR) of described training sequence, and result of calculation is sorted at each angle value in the anglec of rotation detection list;
A3, choose in the described result of calculation testing result value of the maximum pairing angle value of sir value as this user's rotation angle value.
Further, the SCPIR method of calculating two pairing users described in the step B by: calculate two power ratios of training sequence of matching users according to the acquisitions two pairing users' of institute rotation angle value, and with the power ratio of training sequence as two SCPIR that match users.
Further, the SCPIR method of calculating two pairing users described in the step B is: calculate the multipath sum energy ratio of two pairing users' channel estimating, and with the SCPIR of this ratio as two pairing users.
Further, among the step C, if the described SCPIR and the described anglec of rotation do not satisfy the requirement of minimum peak average specific, then the described rotation angle value of deletion from described anglec of rotation detection list is carried out once more and is detected and verification step.
Further, the described anglec of rotation of empirical tests and the SCPIR processing or the signal demodulation that are used for received signal.
Based on said method, the present invention also proposes the device that a kind of VAMOS subscriber equipment detects the anglec of rotation, comprising:
Anglec of rotation detecting unit is used for two pairing users are carried out the anglec of rotation detection of training sequence, obtains two pairing users' the anglecs of rotation;
The SCPIR computing unit is used for the SCPIR according to rotation angle value calculating two users of two pairing users that obtained;
Minimum peak average specific authentication unit is used to verify whether the described SCPIR and the described anglec of rotation satisfy the requirement of minimum peak average specific, if satisfy, then exports the described SCPIR and the described anglec of rotation, is used for the processing or the signal demodulation of received signal.
Further, described device also comprises: the emission mode judging unit, be used for the judgement of two pairing users' emission mode, and if determining two pairing users, this module all do not enter the DTX pattern, then notify anglec of rotation detecting unit to carry out corresponding function.
Further, described anglec of rotation detecting unit comprises:
Extraction module is used for extracting training sequence part in the received signal window;
The snr computation module is used for adopting the mode of least mean-square error to calculate the signal to noise ratio (SIR) of described training sequence at each angle value of anglec of rotation detection list, and result of calculation is sorted;
Anglec of rotation determination module is used for choosing the testing result value of the maximum pairing angle value of sir value of described result of calculation as this user's rotation angle value.
Further, if described minimum peak average specific authentication unit verifies that the described SCPIR and the described anglec of rotation do not satisfy the requirement of minimum peak average specific, then from described anglec of rotation detection list, delete described rotation angle value, and notify described anglec of rotation detecting unit to carry out once more.
Further, described SCPIR computing unit calculates the power ratio of two pairing users' training sequence according to obtain two pairing users' rotation angle value, and with its SCPIR as two pairing users; Or described SCPIR computing unit calculates described two pairing users' the multipath sum energy ratio of channel estimating, and with its SCPIR as two pairing users.
Adopt the method for the invention and device, realized the detection to the anglec of rotation and SCPIR, under the situation that does not need base station signaling subscriber equipment, subscriber equipment can detect the burst anglec of rotation and SCPIR value voluntarily, has saved signaling consumption; (PeakAverage Ratio, checking PAR) can further guarantee the accuracy that detects whether to meet the minimum peak average specific by SCPIR and α value simultaneously.
Description of drawings
Fig. 1 is the VAMOS scheme schematic diagram of a time slot of two shared carrier frequency of user;
The method flow diagram that Fig. 2 VAMOS subscriber equipment of the present invention anglec of rotation detects and SCPIR detects;
Whether Fig. 3 meets the proof diagram of minimum PAR for the checking anglec of rotation and SCPIR in one embodiment of the invention;
Fig. 4 detects and SCPIR checkout gear structure chart for the VAMOS subscriber equipment anglec of rotation of the present invention.
Embodiment
Basic thought of the present invention is: the restrictive condition that subscriber equipment utilizes VAMOS two pairing user's downstream signal anglecs of rotation and the descending modulation signal of Alpha-QPSK to satisfy the minimum peak average specific detects and verifies that the anglec of rotation and sub-channel power are than (SCPIR).
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 1 is the VAMOS scheme schematic diagram of a time slot of two shared carrier frequency of user, two user MS1 take identical carrier frequency with MS2 among the figure, carrier frequency number (Absolute Radio Frequency ChannelNumber, ARFCN) be 160, take identical time slot (Time Slot, TS) be the 3rd time slot, two users distribute different training sequences, and (Time Slot Counter TSC) is respectively 0 and 5.
Scene based on Fig. 1, subscriber equipment is when the demodulated channel data, the final information that only needs the corresponding subchannel of this user of demodulation, but for the interference of the subchannel of eliminating the another one user to this user, need demodulation or know another one user's information such as power, training sequence, need detect and detect the SCPIR of two subchannels another one user's the anglec of rotation.
Fig. 2 is the method flow diagram that the VAMOS subscriber equipment burst anglec of rotation of the present invention detects and SCPIR detects, and concrete steps are as follows:
Step 201: judge this user of base station correspondence descending whether enter discontinuous emission (DiscontinuousTransmission, DTX) pattern is if then flow process finishes; Otherwise execution in step 202;
Whether the user enters the DTX pattern can effectively be detected by other modes by signaling subscriber equipment or subscriber equipment, so DTX information is as known initial conditions of this method.
Under this user, be advanced into the DTX pattern, the calculating that this user no longer needs to detect the anglec of rotation and do not need to carry out SCPIR.
Step 202: judge whether another pairing user enters the DTX pattern, if execution in step 203 then; Otherwise execution in step 204;
When this user does not enter DTX and the another one user enters DTX, then only need to detect this user's the anglec of rotation, the corresponding subsequent demodulation is with single subscriber signal demodulation of the prior art.
Step 203: the anglec of rotation of this user being carried out training sequence detects, and makes that SCPIR is infinitely great, and execution in step 208 then;
Step 204: the anglec of rotation of two pairing users being carried out training sequence detects, and obtains two pairing users' the anglec of rotation respectively;
When this user and another one user's subchannel does not all enter the DTX state, the SCPIR that then needs to detect two users' the anglec of rotation and calculate the two uses for the demodulate reception machine.
The purpose that detects another one user's the anglec of rotation is to have only the detection another one user's that the correct anglec of rotation of having determined another one user could be correct signal power, has had another one user's signal power could calculate two users' SCPIR.
Each user's possible rotation angle value is the several discrete angle value of finite state, the several discrete angle values of finite state are configured for detecting the anglec of rotation detection list of user's anglec of rotation, and each burst is needing anglec of rotation detection list is carried out initialization when step 202 enters this step.
The present invention comprises following step to the detection method of user's the anglec of rotation:
Step1: in the received signal window, extract training sequence part;
Step2: be as the criterion with the rotation value in the anglec of rotation detection list, (Signal Interference Ratio SIR), and sorts to result of calculation to adopt the signal to noise ratio of the mode calculation training sequence of least mean-square error at each angle value in the tabulation;
Step3: choose the testing result value of the pairing angle value of sir value maximum among the result as this user's rotation angle value.
The detailed step that detects user's anglec of rotation in one embodiment of the present invention is: suppose that receiving data is c, training sequence is respectively 0 and 5, then each user carries out a Minimum Mean Square Error estimation at the possible rotation angle value of each agreement regulation, obtains each user's channel impulse response; Then according to the energy (S) of the signal calculated as a result of channel impulse response and training sequence convolution; Received signal e deducts above-mentioned convolution results and obtains disturbing (I), and the power ratio of S and I is the SIR of respective angles.At each user among two users, choose the rotation angle value of the corresponding rotation angle value of SIR maximum as subsequent detection.
Step 205: calculate according to obtained two pairing users' rotation angle value two users training sequence power ratio so that obtain two users' SCPIR, and calculate corresponding α value;
Calculate the power ratio of two users' training sequence according to the rotation angle value that is obtained, and with its power ratio (SCPIR) as two subchannels, the training sequence power ratio can directly utilize the multipath sum energy ratio of two users' channel estimating to replace, so the computational methods of the power ratio of two subchannels are among the present invention: calculate the multipath sum energy ratio of two pairing users' channel estimating, and with the SCPIR of this ratio as two pairing users.
Step 206: the checking SCPIR and the anglec of rotation (are stipulated by the GSM physical layer protocol, as limited several centrifugal pumps such as the PI/2 among Fig. 3, PI/4, if it is other values that the VAMOS user perspective rotation of agreement regulation is worth optional scope, then Fig. 3 need increase the test or the simulation curve of the peak average ratio of other angle rotation values, but do not influence the validity of patent) relation whether meet 3GPP TR45.914 minimum peak average specific (Peak Average Ratio, PAR) requirement then enters step 208 if meet; Otherwise execution in step 207;
Whether Fig. 3 meets the proof diagram of minimum PAR for the checking anglec of rotation and SCPIR in one embodiment of the invention, wherein abscissa is with relevant α (Alpha) value of the power ratio (SCPIR) of two users' subchannel, ordinate is PAR, and the function curve in this proof diagram is α under the different rotary angle that simulator simulation obtains and the function relation curve of PAR.Among the figure dotted line be the anglec of rotation when being PI/4 α and the function relation curve of PAR, the solid line among the figure be the anglec of rotation when being PI/2 α and the function relation curve of PAR.
With Fig. 3 is example, and according to the agreement regulation, the step of carrying out minimum PAR checking is:
α value according to the SCPIR correspondence that detects obtains two PAR values that rotation angle value is PI/4 and PI/2 respectively, find out minimum in these two a PAR values value, if the rotation angle value that the pairing anglec of rotation of value that should minimum is determined with step 203 equates, then detect correctly, otherwise need to attempt other rotation angle value.
Step 207: if the relation of the SCPIR and the anglec of rotation does not meet the PAR requirement, then delete current rotation angle value from anglec of rotation detection list, execution in step 204 then;
The purpose of deleting current rotation angle value from anglec of rotation detection list is to select the anglec of rotation of sir value maximum to carry out the checking of step 206 once more in the remaining possible anglec of rotation.
Step 208: processing or signal demodulation that the anglec of rotation and the SCPIR of empirical tests is used for received signal.
Fig. 4 is the apparatus structure schematic diagram of the VAMOS subscriber equipment detection anglec of rotation of the present invention, and described device comprises: emission mode judging unit, anglec of rotation detecting unit, SCPIR computing unit, minimum peak average specific authentication unit.
The emission mode judging unit is used for the judgement of two pairing users' emission mode, does not all enter the DTX pattern if this module determines two pairing users, then notifies anglec of rotation detecting unit to carry out corresponding function; If determining this user enters the DTX pattern, then be not rotated the verification step of angle and SCPIR; Another pairing user enters if determine that this user does not enter the DTX pattern, then only need call the anglec of rotation that anglec of rotation detecting unit carries out training sequence to this user and detect and get final product, and testing result can be directly used in the processing or the signal demodulation of received signal.
Anglec of rotation detecting unit is connected in the emission mode judging unit, is used for two pairing users are carried out the anglec of rotation detection of training sequence, obtains two pairing users' the anglecs of rotation; This unit further comprises: sequence extraction module, snr computation module, anglec of rotation determination module.
The sequence extraction module is used for extracting training sequence part in channel estimation window;
The snr computation module is used for adopting the mode of least mean-square error to calculate the signal to noise ratio (SIR) of described training sequence at each angle value of anglec of rotation detection list, and result of calculation is sorted;
Anglec of rotation determination module is used for choosing the testing result value of the maximum pairing angle value of sir value of described result of calculation as this user's rotation angle value.
The SCPIR computing unit is connected in anglec of rotation detecting unit, and two pairing users' that are used for being obtained according to anglec of rotation detecting unit rotation angle value is calculated two users' SCPIR;
Minimum peak average specific authentication unit, be connected in the SCPIR computing unit, be used to verify whether the SCPIR of SCPIR computing unit acquisition and the anglec of rotation that anglec of rotation detecting unit obtains satisfy the requirement of minimum peak average specific, if satisfy, then export the described SCPIR and the described anglec of rotation, be used for the processing or the signal demodulation of received signal.
If described minimum peak average specific authentication unit verifies that the described SCPIR and the described anglec of rotation do not satisfy the requirement of minimum peak average specific, then from described anglec of rotation detection list, delete described rotation angle value, and notify described anglec of rotation detecting unit to be rotated the detection that angle detects once more, and carry out the follow-up SCPIR and the verification operation of the anglec of rotation once more.
The above is preferred embodiment of the present invention only, is not to be used to limit protection range of the present invention.
Claims (12)
1. the method for a VAMOS subscriber equipment detection anglec of rotation is characterized in that,
Subscriber equipment utilizes VAMOS two pairing user's downstream signal anglecs of rotation and sub-channel power to detect and the checking anglec of rotation and sub-channel power ratio than the restrictive condition that (SCPIR) satisfies the minimum peak average specific, and described detection and checking are specially:
A, the anglec of rotation that two pairing users are carried out training sequence respectively detect, and obtain two pairing users' the anglecs of rotation;
B, calculate two pairing users' SCPIR according to obtained two pairing users' rotation angle value;
Whether C, the described SCPIR of checking and the described anglec of rotation satisfy the requirement of minimum peak average specific, then are proved to be successful if satisfy.
2. method according to claim 1 is characterized in that, comprises also before the described steps A that two pairing users' transmitter module detects step, is specially:
Judge that respectively whether two pairing users enter discontinuous emission (DTX) pattern, all do not enter the DTX pattern as if two pairing users, then execution in step A.
3. method according to claim 1 is characterized in that, the method that obtains user's anglec of rotation in the steps A is specially:
A1, in the received signal window, extract training sequence part;
A2, adopt the mode of least mean-square error to calculate the signal to noise ratio (SIR) of described training sequence, and result of calculation is sorted at each angle value in the anglec of rotation detection list;
A3, choose in the described result of calculation testing result value of the maximum pairing angle value of sir value as this user's rotation angle value.
4. method according to claim 1, it is characterized in that, the SCPIR method of calculating two pairing users described in the step B by: calculate two power ratios of training sequence of matching users according to the acquisitions two pairing users' of institute rotation angle value, and with the power ratio of training sequence as two SCPIR that match users.
5. method according to claim 1 is characterized in that, the SCPIR method of calculating two pairing users described in the step B is: calculate the multipath sum energy ratio of two pairing users' channel estimating, and with the SCPIR of this ratio as two pairing users.
6. method according to claim 3, it is characterized in that, among the step C, if the described SCPIR and the described anglec of rotation do not satisfy the requirement of minimum peak average specific, then the described rotation angle value of deletion from described anglec of rotation detection list is carried out once more and is detected and verification step.
7. according to any described method of claim in the claim 1 to 6, it is characterized in that processing that the described anglec of rotation of empirical tests and SCPIR are used for received signal or signal demodulation.
8. the device of a VAMOS subscriber equipment detection anglec of rotation is characterized in that, comprising:
Anglec of rotation detecting unit is used for two pairing users are carried out the anglec of rotation detection of training sequence, obtains two pairing users' the anglecs of rotation;
The SCPIR computing unit is used for the SCPIR according to two pairing users' that obtained rotation angle value calculating two pairing users;
Minimum peak average specific authentication unit is used to verify whether the described SCPIR and the described anglec of rotation satisfy the requirement of minimum peak average specific, if satisfy, then exports the described SCPIR and the described anglec of rotation, is used for the processing or the signal demodulation of received signal.
9. device according to claim 8 is characterized in that, described device also comprises:
The emission mode judging unit is used for the judgement of two pairing users' emission mode, does not all enter the DTX pattern if this module determines two pairing users, then notifies anglec of rotation detecting unit to carry out corresponding function.
10. device according to claim 8 is characterized in that, described anglec of rotation detecting unit comprises:
Extraction module is used for extracting training sequence part in the received signal window;
The snr computation module is used for adopting the mode of least mean-square error to calculate the signal to noise ratio (SIR) of described training sequence at each angle value of anglec of rotation detection list, and result of calculation is sorted;
Anglec of rotation determination module is used for choosing the testing result value of the maximum pairing angle value of sir value of described result of calculation as this user's rotation angle value.
11. device according to claim 10, it is characterized in that, if described minimum peak average specific authentication unit verifies that the described SCPIR and the described anglec of rotation do not satisfy the requirement of minimum peak average specific, then from described anglec of rotation detection list, delete described rotation angle value, and notify described anglec of rotation detecting unit to carry out once more.
12. device according to claim 8 is characterized in that, described SCPIR computing unit calculates the power ratio of two pairing users' training sequence according to obtain two pairing users' rotation angle value, and with its SCPIR as two pairing users; Or described SCPIR computing unit calculates described two pairing users' the multipath sum energy ratio of channel estimating, and with its SCPIR as two pairing users.
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| CN104025672A (en) * | 2012-12-31 | 2014-09-03 | 英特尔移动通信有限责任公司 | Device, method, mobile station, and digital storage medium |
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| CN101483460A (en) * | 2008-01-11 | 2009-07-15 | 三星电子株式会社 | Method for constructing gradable PMI signaling used for MU-MIMO system |
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| CN104025672B (en) * | 2012-12-31 | 2018-12-25 | 英特尔德国有限责任公司 | Device, method, mobile station and digital storage media |
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