CN103379610B - For the method and apparatus using double antenna estimation signal-to-noise ratio - Google Patents
For the method and apparatus using double antenna estimation signal-to-noise ratio Download PDFInfo
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Abstract
Each embodiment of the invention generally relates to a kind of methods and apparatus for using double antenna estimation signal-to-noise ratio.Specifically, this method may include: using double antenna Receiving signal；It determines the need for carrying out joint-detection for every signal all the way；If it is determined that signal needs to carry out joint-detection all the way, then the signal-to-noise ratio of the road signal is calculated after the joint-detection；And the signal-to-noise ratio per signal all the way being computed is incorporated as final signal-to-noise ratio.Accordingly, it additionally provides for the equipment using double antenna estimation signal-to-noise ratio.SNR can be accurately estimated by using the embodiments of the present invention and promotes SNR to carry out power control and then improve TD-SCDMA system.
Description
Cross reference to related applications
This application claims the priority for the 61/640th, No. 185 U.S. Provisional Application submitted on April 30th, 2012,
Disclosure is fully incorporated in this by reference.
Technical field
Each embodiment of the invention generally relates to fields of communication technology, and more particularly, to one kind for benefit
With the method and apparatus of double antenna estimation signal-to-noise ratio (SNR).
Background technique
With flourishing for 3G (Third Generation) Moblie (3G) technology and systems, TD SDMA (TD-SCDMA)
Core standard one of of the technology as 3G technology is widely used.Existing TD-SCDMA terminal mostly uses single antenna to connect greatly
Receipts technology.However, due to the presence of multipath reflection, will appear difference at the receiving end of terminal in actual mobile communication
Multiple Signal averagings of phase seriously affect the demodulation performance of terminal to cause the dramatic variation of reception signal amplitude.Especially
In cell edge, terminal has no ability to confrontation deep fade or with frequency, this causes network throughput to become very poor.
Since TD-SCDMA system is self-interference system, reducing transmission power can be improved power system capacity, while by
The performance of power control is directly affected in the superiority and inferiority of SNR, therefore the traditional demodulation method in TD-SCDMA system passes through to SNR's
Detection is to carry out power control.In turn, power control is carried out for improving TD- by accurately estimating SNR and promoting SNR
SCDMA system is particularly important.
Summary of the invention
The first purpose of each illustrative embodiments of the invention is to provide a kind of for estimating noise using double antenna
The method and apparatus of ratio.
The certain embodiments of one aspect according to the present invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Method, such as may include: using double antenna Receiving signal；It determines the need for carrying out joint inspection for per signal all the way
It surveys；If it is determined that signal needs to carry out joint-detection all the way, then the noise of the road signal is calculated after the joint-detection
Than；And the signal-to-noise ratio per signal all the way being computed is incorporated as final signal-to-noise ratio.
The certain embodiments of one aspect according to the present invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Method, wherein for determining the need for carrying out joint-detection per signal all the way may include described per signal all the way by detecting
In demodulated signal come determine the need for carry out joint-detection.
The certain embodiments of one aspect according to the present invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Method, wherein then calculating the road signal after the joint-detection if it is determined that signal needs to carry out joint-detection all the way
Signal-to-noise ratio may include then calculating the signal-to-noise ratio of the road A signal simultaneously if it is determined that be required to carry out joint-detection per signal all the way
It is denoted as SNR_A, and calculates the signal-to-noise ratio of the road B signal and is denoted as SNR_B.
The certain embodiments of one aspect according to the present invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Method, wherein then calculating the road signal after the joint-detection if it is determined that signal needs to carry out joint-detection all the way
Signal-to-noise ratio may include if it is determined that only all the way signal need to carry out joint-detection, then calculate the signal-to-noise ratio of the road signal
And as the final signal-to-noise ratio.
The certain embodiments of one aspect according to the present invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Method, wherein by the signal-to-noise ratio merging for being computed per signal all the way may include: judge whether the SNR_A be greater than described in
SNR_B calculates SNR_A/SNR_B and is denoted as SNR_RAB if the SNR_A is greater than the SNR_B；And it is if described
SNR_A is not more than the SNR_B, then calculates SNR_B/SNR_A and be denoted as SNR_RBA；Judging the SNR_RAB/SNR_RBA is
It is no to be greater than predetermined threshold M, if the SNR_RAB is greater than the predetermined threshold M, using the SNR_A as the final letter
It makes an uproar ratio；If the SNR_RBA is greater than the predetermined threshold M, using the SNR_B as the final signal-to-noise ratio；And such as
SNR_RAB/SNR_RBA described in fruit is not more than the predetermined threshold M, then by the SNR_A and SNR_B summation as final
Signal-to-noise ratio.
The certain embodiments of one aspect according to the present invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Method, wherein the predetermined threshold M can be greater than 1.
The certain embodiments of one aspect according to the present invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Method, wherein the signal can be same down link signal.
Certain embodiments according to a further aspect of the invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Equipment, such as may include: reception device, it is configured with double antenna Receiving signal；Determining device is configured as needle
Every signal all the way is determined the need for carrying out joint-detection；Computing device, be configured as if it is determined that all the way signal need into
Row joint-detection then calculates the signal-to-noise ratio of the road signal after the joint-detection；And merge device, be configured as by
The signal-to-noise ratio per signal all the way being computed is incorporated as final signal-to-noise ratio.
Certain embodiments according to a further aspect of the invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Equipment, wherein for determining the need for carrying out joint-detection per signal all the way may include described per signal all the way by detecting
In demodulated signal come determine the need for carry out joint-detection.
Certain embodiments according to a further aspect of the invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Equipment, wherein then calculating the road signal after the joint-detection if it is determined that signal needs to carry out joint-detection all the way
Signal-to-noise ratio may include then calculating the signal-to-noise ratio of the road A signal simultaneously if it is determined that be required to carry out joint-detection per signal all the way
It is denoted as SNR_A, and calculates the signal-to-noise ratio of the road B signal and is denoted as SNR_B.
Certain embodiments according to a further aspect of the invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Equipment, wherein then calculating the road signal after the joint-detection if it is determined that signal needs to carry out joint-detection all the way
Signal-to-noise ratio may include if it is determined that only all the way signal need to carry out joint-detection, then calculate the signal-to-noise ratio of the road signal
And as the final signal-to-noise ratio.
Certain embodiments according to a further aspect of the invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Equipment, wherein include: to judge whether the SNR_A is greater than the SNR_B by the signal-to-noise ratio merging per signal all the way being computed,
If the SNR_A is greater than the SNR_B, calculates SNR_A/SNR_B and be denoted as SNR_RAB；If the SNR_A is not more than
The SNR_B then calculates SNR_B/SNR_A and is denoted as SNR_RBA；It is predetermined to judge whether the SNR_RAB/SNR_RBA is greater than
Threshold value M, if the SNR_RAB is greater than the predetermined threshold M, using the SNR_A as the final signal-to-noise ratio；If institute
SNR_RBA is stated greater than the predetermined threshold M, then using the SNR_B as the final signal-to-noise ratio；And the if SNR_
RAB/SNR_RBA is not more than the predetermined threshold M, then regard the SNR_A and SNR_B summation as final signal-to-noise ratio.
Certain embodiments according to a further aspect of the invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Equipment, wherein the predetermined threshold M can be greater than 1.
Certain embodiments according to a further aspect of the invention provide a kind of for utilizing double antenna estimation signal-to-noise ratio
Equipment, wherein the signal can be same down link signal.
The embodiments of the present invention accurately estimate SNR by double antenna Receiving mechanism and promote SNR to carry out
Power control, it is advantageous that: (1) terminal is received using two antennas, can efficiently use the space between different antennae
Diversity gain fights multipath effect, to improve the receptivity of terminal, improves the user experience of cell edge；(2) can
The stability of SNR estimation is significantly improved, to improve the performance of power control, and is realized simple；And (3) can significantly increase
Network performance, and without carrying out any transformation to network.
Detailed description of the invention
It refers to the following detailed description in conjunction with the accompanying drawings, the feature, advantage and other aspects of each embodiment of the present invention will become
It obtains more obvious, in which:
Fig. 1 shows conventional single-antenna and receives structural block diagram；
Fig. 2 shows the processes that illustrative embodiments according to the present invention are used for the method using double antenna estimation signal-to-noise ratio
Figure；
Fig. 3 shows the frame for the equipment that illustrative embodiments according to the present invention are used for using double antenna estimation signal-to-noise ratio
Figure；
Fig. 4 shows the dual-antenna reception structural block diagram of illustrative embodiments according to the present invention；
The two paths of data that Fig. 5 shows illustrative embodiments according to the present invention is double antenna SNR when joint-detection
Estimation and power control procedures figure；
Double antenna when the only circuit-switched data that Fig. 6 shows illustrative embodiments according to the present invention needs to do joint-detection
SNR estimation and power control procedures figure；And
Fig. 7, which is schematically illustrated, will be benefited from exemplary embodiment of the invention and can be the exemplary reality of the present invention
Apply the block diagram of the mobile terminal of mode exemplary device.
Specific embodiment
The principle and spirit of the invention are described below with reference to several illustrative embodiments.It should be appreciated that providing this
A little embodiments are used for the purpose of making those skilled in the art can better understand that realizing the present invention in turn, and be not with any
Mode limits the scope of the invention.
Fig. 1 shows conventional single-antenna and receives structural block diagram.Wherein, the biography for TD-SCDMA system is illustrated
System demodulation method.This method calculates the data of the multiple code channels mixed by joint-detection, obtains each code
Then transmission symbol on road will need decoded symbol to be converted to soft bit and be transmitted to decoder module and be decoded, thus
To information bit.SNR estimation is carried out after joint-detection, and the SNR of estimation is sent to power control (APC) module for power
Control.But in the serious region of multipath reflection or cell edge, single antenna terminal demodulation performance is poor, this serious limitation
The data throughout of user.Since multipath reflection causes the big ups and downs of SNR also to make the reduced performance of power control, and it is single
Antenna terminal equipment limit network coverage, and requirements at the higher level are proposed to output power in base station, to increase base station
Construction cost.
Fig. 2 shows illustrative embodiments according to the present invention to be used to estimate using double antenna the method 200 of signal-to-noise ratio
Flow chart.As shown in Fig. 2, using double antenna Receiving signal in frame S201.
In an exemplary embodiment, the same downlink letter of double antenna Receiving can be used in mobile terminal
Number.It should be readily apparent to one skilled in the art that mobile communication can be overcome well by carrying out received terminal using dual-antenna diversity
Complicated transmission environment, make full use of transmission in multipath signal energy, and then improve terminal demodulation performance.
According to an illustrative embodiment of the invention, it in frame S202, determines the need for carrying out for per signal all the way
Joint-detection.
It in an exemplary embodiment, wherein can be with for determining the need for carrying out joint-detection per signal all the way
Including determining the need for carrying out joint-detection by detecting the demodulated signal per in signal all the way.Specifically, by base
The signal issued of standing may include data-signal and demodulated signal.For per signal, mobile terminal can be estimated by channel all the way
It counts to detect demodulated signal therein (for example, training sequence) to determine the need for carrying out joint-detection to the road signal.Such as
Fruit does not need to carry out the road signal joint-detection, and the road Ze Jianggai signal abandons.
According to an illustrative embodiment of the invention, in frame S203, if it is determined that signal needs to carry out joint inspection all the way
It surveys, then calculates the signal-to-noise ratio of the road signal after the joint-detection.
In an exemplary embodiment, wherein if it is determined that signal needs to carry out joint-detection all the way, then described
The signal-to-noise ratio that the road signal is calculated after joint-detection may include if it is determined that being required to carry out joint inspection per signal all the way
It surveys, then calculates the signal-to-noise ratio of the road A signal and be denoted as SNR_A, and calculate the signal-to-noise ratio of the road B signal and be denoted as SNR_B.
In an exemplary embodiment, wherein if it is determined that signal needs to carry out joint-detection all the way, then described
The signal-to-noise ratio that the road signal is calculated after joint-detection may include if it is determined that only signal needs to carry out joint inspection all the way
It surveys, then calculates the signal-to-noise ratio of the road signal and as final signal-to-noise ratio.
According to an illustrative embodiment of the invention, in frame S204, the signal-to-noise ratio per signal all the way being computed is closed
And as final signal-to-noise ratio.
In an exemplary embodiment, wherein may include: by the signal-to-noise ratio merging per signal all the way being computed
Judge whether the SNR_A is greater than the SNR_B, if the SNR_A is greater than the SNR_B, calculates SNR_A/SNR_B simultaneously
It is denoted as SNR_RAB；And it if the SNR_A is not more than the SNR_B, calculates SNR_B/SNR_A and is denoted as SNR_RBA；
Judge whether the SNR_RAB/SNR_RBA is greater than predetermined threshold M, if the SNR_RAB is greater than the predetermined threshold M,
Using the SNR_A as the final signal-to-noise ratio；If the SNR_RBA is greater than the predetermined threshold M, by the SNR_B
As the final signal-to-noise ratio；It, will be described and if the SNR_RAB/SNR_RBA is not more than the predetermined threshold M
SNR_A and SNR_B summation is used as final signal-to-noise ratio.
In an exemplary embodiment, wherein the predetermined threshold M can be greater than 1.Those skilled in the art are easy
Understand, the predetermined threshold M can for example be preset based on statistics by system, or by user and/or system manager's hand
Dynamic setting.
Fig. 3 schematically illustrates the equipment 300 that each embodiment according to the present invention is used to estimate using double antenna signal-to-noise ratio
Block diagram.Equipment 300 for example may include reception device 301, be configured with double antenna Receiving signal；Determining device
302, it is configured as determining the need for carrying out joint-detection for every signal all the way；Computing device 303, if be configured as really
Fixed signal all the way needs to carry out joint-detection, then the signal-to-noise ratio of the road signal is calculated after the joint-detection；And it closes
And device 304, the signal-to-noise ratio per signal all the way for being configured as to be computed are incorporated as final signal-to-noise ratio.
For clarity, the sub-device that each device is included is not shown in Figure 3.It will be appreciated, however, that equipment
The device recorded in 300 is corresponding with the step in the method 200 for referring to Fig. 2 description respectively.As a result, above with respect to the side of Fig. 2
The operation and feature that method 200 describes are equally applicable to equipment 300 and device wherein included and sub-device, and details are not described herein.
It should be appreciated that equipment 300 can use various modes to realize.For example, in some embodiments, equipment 300
Software and/or firmware module be can use to realize.In addition, equipment 300 can use hardware module also to realize.For example, setting
Standby 300 can be implemented as integrated circuit (IC) chip or specific integrated circuit (ASIC).Equipment 300 also can be implemented as on piece system
It unites (SOC).In addition, equipment 300 can use the combination of hardware module and software and/or firmware module also to realize.Now
Know or in the future exploitation other modes be also it is feasible, the scope of the present invention is not limited in this respect.
Fig. 4 shows the dual-antenna reception structural block diagram of illustrative embodiments according to the present invention.Specifically, in Fig. 4 institute
In the dual-antenna terminal shown, diversity reception is carried out to down link signal using two-way.Wherein per the single channel received all the way with Fig. 1
Similar, respective progress channel estimation and joint-detection are received, scales (scaling) parameter (401) used in reselection two-way,
Demapping processing (402,405) are carried out later, then carry out the merging of two-way soft bit (403) and then terminal solution tonality can be improved
Can, finally it is decoded processing (404).
After two-way respectively carries out joint-detection, first respectively carry out SNR estimation (406,407), then calculate larger SNR and
The ratio (408) of smaller SNR, judges whether this ratio is greater than threshold value M.If it is greater than threshold value M, it may be considered that wherein all the way
The influence of deep fade or heavy multipath reflection may be received and lead to lower SNR, and another way SNR is relatively good.At this moment
The SNR all the way for selecting the quality of reception good as the time slot final SNR and transmitted to power control module (APC), then APC
Downlink signal power control (409) are carried out using the SNR, soft bit later does not need to merge yet, and only chooses the number
According to being decoded.If two-way SNR ratio is less than threshold value M, then it is assumed that two paths of data can merge processing, by two-way SNR
It is added and is used as the final SNR of the time slot, and be transferred to power control module for power control.If only needing to do all the way
Joint-detection, then SNR is directly using the result in the channel for doing joint-detection.This method can greatly improve the steady of SNR estimation
Qualitative and accuracy improves the performance of power control, and realizes that simply complexity is small.
SNR estimation when the two paths of data that Fig. 5 shows illustrative embodiments according to the present invention does joint-detection and
The flow chart of Poewr control method.
As shown in fig. 5, it is assumed that two paths of data is known respectively as the road A and the road B.Firstly, whether needing to do to join to two paths of data
It closes detection to be judged, if necessary to carry out joint-detection, then calculates separately the SNR on the road A and the road B after detection terminates, and
It is denoted as SNR_A and SNR_B respectively；If you do not need to carrying out joint-detection, then abandoned；Later, by SNR_A and SNR_
B is compared.
If SNR_A is greater than SNR_B, calculates the value of SNR_A/SNR_B and be denoted as SNR_RAB；Later, by this
SNR_RAB is compared with threshold value M；If SNR_RAB is greater than threshold value M, using SNR_A as the final SNR of the time slot；If
SNR_RAB is less than threshold value M, then the final SNR by the sum of SNR_A and SNR_B as the time slot；Then the SNR value is sent to
Power control module is controlled for downlink signal power.
If obtaining SNR_A in the step of being compared to SNR_A and SNR_B no more than SNR_B, SNR_B/ is calculated
The value of SNR_A is simultaneously denoted as SNR_RBA；Later, SNR_RBA is compared with threshold value M；If SNR_RBA is greater than threshold value
M, then using SNR_B as the final SNR of the time slot；If SNR_RBA is less than threshold value M, by the sum of SNR_A and SNR_B conduct
The final SNR of the time slot；Then it sends the SNR value to power control module and is used for downlink signal power control.
SNR when the only circuit-switched data that Fig. 6 shows illustrative embodiments according to the present invention needs to do joint-detection estimates
The flow chart of meter and Poewr control method.
As shown in Figure 6, it is assumed that two paths of data is known respectively as the road A and the road B, and wherein the road B needs to carry out joint-detection and the road A
It does not need to carry out joint-detection.Determine that the road A does not need to do joint-detection first；Determine that the road B is to need to do joint-detection；To B
After road carries out joint-detection, calculates the SNR on the road B and be denoted as SNR_B；Then using SNR_B as the final SNR of the time slot
Power control module is sent to control for downlink signal power.
By described above, it will be appreciated by those skilled in the art that the major advantage of each embodiment of the present invention is: (1)
Terminal is received using two antennas, can efficiently use the space diversity gain between different antennae to fight multipath effect,
To improve the receptivity of terminal, improve the user experience of cell edge；(2) stability of SNR estimation can be significantly improved,
To improve the performance of power control, and realize simple；(3) network performance can be significantly increased, and without appointing to network
What is transformed.
Below with reference to Fig. 7, it illustrates the schematic frames for the mobile terminal 700 for being suitable for being used to practice embodiment of the present invention
Figure.In the example depicted in fig. 7, mobile terminal 700 is the mobile device with wireless communication ability.However, it is possible to manage
Solution, this is merely exemplary and not limiting.Other kinds of mobile terminal can also easily use implementation of the invention
Mode, such as portable digital-assistant (PDA), pager, mobile computer, mobile TV, game station, calculating on knee
Machine, camera, video recorder, GPS device and other kinds of voice and text communication system.Fixed mobile terminal equally may be used
Easily to use embodiments of the present invention.
Mobile terminal 700 may include two or more antennas 718, operationally with transmitter 714 and receiver 716
It is communicated.Mobile terminal 700 further includes processor 712 or other processing elements, provides go to transmitter 714 respectively
The signal of signal and reception from receiver 716.Signal includes believing according to the signaling of the air-interface standard of appropriate cellular system
Breath, and further include the data that user speech, received data and/or user generate.In this regard, mobile terminal 700 can
It is operated using one or more air interface standard, communication protocols, modulation type and access style.As demonstration,
Mobile terminal 700 can be according to any agreement in multiple first generation, the second generation, the third generation and/or forth generation communication protocol etc.
To be operated.For example, mobile terminal 700 can be according to the second generation (G) wireless communication protocol IS-136 (TDMA), GSM
It is operated with IS-95 (CDMA), or according to the third generation (G) of such as UMTS, CDMA2000, WCDMA and TD-SCDMA
Wireless communication protocol is operated to be operated, or according to forth generation (4G) wireless communication protocol and/or similar agreement.
It is appreciated that processor 712 includes circuit needed for realizing the function of mobile terminal 700.For example, processor 712
It may include digital signal processor device, microprocessor device, various analog-digital converters, digital analog converter and other support electricity
Road.The control of mobile terminal 700 and signal processing function distribute therebetween according to the respective ability of these equipment.Processor 712
It thus can also include the function of carrying out convolutional encoding and intertexture to message and data before modulation and transmission.Processor 712
Internal voice coder can also be also comprised, and may include internal data modem.In addition, processor 712 can
To include the function of being operated to the one or more software programs that can store in memory.For example, processor 712 can
Linker, such as traditional Web browser can be operated.Linker then can permit mobile terminal 700 for example by
Emit according to Wireless Application Protocol (WAP), hypertext transfer protocol (HTTP) etc. and receive web content and is (such as location-based
Content and/or other web page contents).
Mobile terminal 700 can also include user interface, such as may include earphone or loudspeaker 724, ringer
722, microphone 726, display screen 728 and handwriting equipment 731, all these equipment are both coupled to processor 712.Mobile terminal
700 may include keypad 730.Keypad 730 may include traditional number key (0-9) and relative keys (#, *), and be used for
Operate other keys of mobile terminal 700.Alternatively, keypad 730 may include traditional QWERTY keypad arrangement.Keypad
730 can also include various soft keys associated with function.Mobile terminal 700 can also include acceleration induction module 736, use
In the movement (movement) that capture user makes.
Specifically, display screen 728 may include touch-screen and/or neighbouring formula screen, and user can be by directly grasping
Make screen and operates mobile terminal 700.At this point, display screen 728 functions simultaneously as both input equipment and output equipment.Such
In embodiment, handwriting equipment 731 may be configured to receive user for example, by common pen, dedicated stylus and/or finger
The input provided on display screen 728, including give directions input and gesture input.
In addition, mobile terminal 700 may include such as control stick interface equipment or other for input interface.It is mobile
Terminal 700 further includes battery 734, such as vibrating battery group, for powering for various circuits needed for operation mobile terminal 700,
And mechanical oscillation are optionally provided as detectable output.
Mobile terminal 700 may further include Subscriber Identity Module (UIM) 738.UIM738 is usually to have built-in place
Manage the memory devices of device.UIM738 for example may include subscriber identity module (SIM), Universal Integrated Circuit Card (UICC), lead to
With subscriber identity module (USIM), removable Subscriber Identity Module (R-UIM) etc..UIM738 is commonly stored related to mobile subscriber
Cell.
Mobile terminal 700 can also have memory.For example, mobile terminal 700 may include volatile memory 740,
Volatile random access memory (RAM) for example including the cache area for data temporary storage.Mobile terminal 700
It can also include other nonvolatile memories 742, can be Embedded and/or moveable.Nonvolatile memory
742 can additionally or alternatively include such as EEPROM and flash memory.Memory can store mobile terminal 700 and be used
Multiple pieces of information and data in Arbitrary Term, to realize the function of mobile terminal 700.
It should be appreciated that structural block diagram described in Fig. 7 is shown for illustrative purposes only, rather than to model of the present invention
The limitation enclosed.In some cases, it can increase or reduce certain equipment as the case may be.
It should be noted that embodiments of the present invention can be realized by the combination of hardware, software or software and hardware.
Hardware components can use special logic to realize；Software section can store in memory, by instruction execution system appropriate
System, such as microprocessor or special designs hardware execute.It will be understood by those skilled in the art that above-mentioned equipment
Computer executable instructions can be used and/or be included in the processor control code with method and realize, such as in such as magnetic
Disk, the mounting medium of CD or DVD-ROM, such as read-only memory (firmware) programmable memory or such as optics or electricity
Such code is provided in the data medium of subsignal carrier.Equipment and its module of the invention can be by such as ultra-large
The semiconductor or such as field programmable gate array of integrated circuit or gate array, logic chip, transistor etc. can be compiled
The hardware circuit realization of the programmable hardware device of journey logical device etc., can also be soft with being executed by various types of processors
Part is realized, can also be realized by the combination such as firmware of above-mentioned hardware circuit and software.
It should be noted that although being referred to the several devices or sub-devices of equipment in the above detailed description, this stroke
Divide only not enforceable.In fact, embodiment according to the present invention, the feature of two or more above-described devices
It can be embodied in one apparatus with function.Conversely, the feature and function of an above-described device can further be drawn
It is divided by multiple devices and embodies.
In addition, although describing the operation of the method for the present invention in the accompanying drawings with particular order, this do not require that or
Hint must execute these operations in this particular order, or have to carry out shown in whole operation be just able to achieve it is desired
As a result.On the contrary, the step of describing in flow chart can change and execute sequence.Additionally or alternatively, it is convenient to omit certain steps,
Multiple steps are merged into a step to execute, and/or a step is decomposed into execution of multiple steps.
Although detailed description of the preferred embodimentsthe present invention has been described by reference to several, it should be appreciated that, the present invention is not limited to
Disclosed specific embodiment.The present invention is directed to cover various modifications included in spirit and scope of the appended claims
And equivalent arrangements.Scope of the following claims is to be accorded the broadest interpretation, to include all such modifications and equivalent knot
Structure and function.
Claims (10)
1. one kind is for the method using double antenna estimation signal-to-noise ratio (SNR), comprising:
Use double antenna Receiving signal；
It determines the need for carrying out joint-detection for every signal all the way；
If it is determined that signal needs to carry out joint-detection all the way, then the noise of the road signal is calculated after the joint-detection
Than；And
The signal-to-noise ratio per signal all the way being computed is incorporated as final signal-to-noise ratio,
Wherein if it is determined that signal needs to carry out joint-detection all the way, then the road signal is calculated after the joint-detection
Signal-to-noise ratio includes then calculating the signal-to-noise ratio of the road A signal and being denoted as if it is determined that be required to carry out joint-detection per signal all the way
SNR_A, and calculate the signal-to-noise ratio of the road B signal and be denoted as SNR_B, and
Wherein include: by the signal-to-noise ratio merging per signal all the way being computed
Judge whether the SNR_A is greater than the SNR_B,
If the SNR_A is greater than the SNR_B, calculates SNR_A/SNR_B and be denoted as SNR_RAB；And
If the SNR_A is not more than the SNR_B, calculates SNR_B/SNR_A and be denoted as SNR_RBA；
Judge whether the SNR_RAB or SNR_RBA is greater than predetermined threshold M,
If the SNR_RAB is greater than the predetermined threshold M, using the SNR_A as the final signal-to-noise ratio；
If the SNR_RBA is greater than the predetermined threshold M, using the SNR_B as the final signal-to-noise ratio；And
If the SNR_RAB or SNR_RBA is not more than the predetermined threshold M,
Then it regard the SNR_A and SNR_B summation as final signal-to-noise ratio.
2. according to the method described in claim 1, wherein for determining the need for carrying out joint-detection per signal all the way including
It determines the need for carrying out joint-detection by detecting the demodulated signal per in signal all the way.
3. according to the method described in claim 1, wherein if it is determined that signal needs to carry out joint-detection all the way, then described
Close detection after calculate the road signal signal-to-noise ratio include if it is determined that only all the way signal need to carry out joint-detection, then count
Calculate the signal-to-noise ratio of the road signal and as the final signal-to-noise ratio.
4. according to the method described in claim 1, wherein the predetermined threshold M is greater than 1.
5. method as claimed in any of claims 1 to 4, wherein the signal is same down link signal.
6. one kind is for the equipment using double antenna estimation signal-to-noise ratio (SNR), comprising:
Reception device is configured with double antenna Receiving signal；
Determining device is configured as determining the need for carrying out joint-detection for every signal all the way；
Computing device is configured as then counting after the joint-detection if it is determined that signal needs to carry out joint-detection all the way
Calculate the signal-to-noise ratio of the road signal；And
Merging device, the signal-to-noise ratio per signal all the way for being configured as to be computed is incorporated as final signal-to-noise ratio,
Wherein if it is determined that signal needs to carry out joint-detection all the way, then the road signal is calculated after the joint-detection
Signal-to-noise ratio includes then calculating the signal-to-noise ratio of the road A signal and being denoted as if it is determined that be required to carry out joint-detection per signal all the way
SNR_A, and calculate the signal-to-noise ratio of the road B signal and be denoted as SNR_B,
Wherein include: by the signal-to-noise ratio merging per signal all the way being computed
Judge whether the SNR_A is greater than the SNR_B,
If the SNR_A is greater than the SNR_B, calculates SNR_A/SNR_B and be denoted as SNR_RAB；
If the SNR_A is not more than the SNR_B, calculates SNR_B/SNR_A and be denoted as SNR_RBA；
Judge whether the SNR_RAB or SNR_RBA is greater than predetermined threshold M,
If the SNR_RAB is greater than the predetermined threshold M, using the SNR_A as the final signal-to-noise ratio；
If the SNR_RBA is greater than the predetermined threshold M, using the SNR_B as the final signal-to-noise ratio；And
If the SNR_RAB or SNR_RBA is not more than the predetermined threshold M,
Then it regard the SNR_A and SNR_B summation as final signal-to-noise ratio.
7. equipment according to claim 6, wherein for determining the need for carrying out joint-detection per signal all the way including
It determines the need for carrying out joint-detection by detecting the demodulated signal per in signal all the way.
8. equipment according to claim 6, wherein if it is determined that signal needs to carry out joint-detection all the way, then described
Close detection after calculate the road signal signal-to-noise ratio include if it is determined that only all the way signal need to carry out joint-detection, then count
Calculate the signal-to-noise ratio of the road signal and as the final signal-to-noise ratio.
9. equipment according to claim 6, wherein the predetermined threshold M is greater than 1.
10. equipment according to any one of claims 6 to 9, wherein the signal is same down link signal.
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