CN105897300B - Signal acceptance method, device and the user equipment for avoiding cochannel to interfere within the physical layer - Google Patents
Signal acceptance method, device and the user equipment for avoiding cochannel to interfere within the physical layer Download PDFInfo
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- CN105897300B CN105897300B CN201510208410.XA CN201510208410A CN105897300B CN 105897300 B CN105897300 B CN 105897300B CN 201510208410 A CN201510208410 A CN 201510208410A CN 105897300 B CN105897300 B CN 105897300B
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- predetermined threshold
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Abstract
Embodiment of the disclosure provides a kind of signal acceptance method and device for avoiding cochannel to interfere within the physical layer, to solve the problems, such as when receiving the signal of cochannel transmitting simultaneously since the Packet Error Ratio that cochannel interferes and generates is high.For this purpose, an aspect of this disclosure provides a kind of signal acceptance method and device for avoiding cochannel to interfere within the physical layer, this method comprises: judging whether the energy intensity of signal is greater than predetermined threshold；And it is greater than predetermined threshold in response to the energy intensity of signal, receiver reset and signal is received by receiver.
Description
Cross reference to related applications
This application claims the priority for the 61/990th, No. 909 U.S. Provisional Application submitted on May 9th, 2014, public
Content is opened to be incorporated by by reference in this.
Technical field
The disclosure relates generally to the communications fields, more particularly, to the signal for avoiding cochannel to interfere within the physical layer
Method of reseptance and device.
Background technique
ZigBee is the low-power consumption LAN protocol based on IEEE802.15.4 standard.It is provided according to international standard,
ZigBee technology is the wireless communication technique of a kind of short distance, low-power consumption.Its main feature is that short distance, low complex degree, self-organizing, low
Power consumption, low data rate.It is mainly suitable for that various equipment can be embedded in for automatic control and remote control field.In brief,
ZigBee is a kind of cheap, the near radio networking mechanics of communication of low-power consumption.
In such as wireless communication protocol of ZigBee 2.4G, cochannel interference in the case where, that is, synchronization,
It in the case that same channel emits two signal packets, is traditionally arranged to be at present in receiving end using the time as priority, that is, receive first
That packet arrived.
Summary of the invention
However, the scheme in above-mentioned background technique is it is possible that problem: if the packet of weaker signal is first sent out by receiver
Now and confirm and reached simultaneously in the process for receiving the packet compared with the packet of strong signal, then can make the packet of the two signals cannot be just
Really receive.That is, when after the packet energy that arrives it is stronger when, that packet that receiving end is arrived after not only ignoring, the packet arrived first can also
By it is rear to be responsible for a task until it is completed and disturb so that the packet that receiving end did not both receive the packet arrived first or arrived after not receiving.Thus, it results in
Higher Packet Error Ratio.Therefore, it is necessary to wrap (packet in packet, PIP) mechanism in a kind of packet to solve the problems, such as this.
Embodiment of the disclosure provides a kind of signal acceptance method and device for avoiding cochannel to interfere within the physical layer,
To solve the problems, such as when receiving the signal of cochannel transmitting simultaneously since the Packet Error Ratio that cochannel interferes and generates is high.
For this purpose, an aspect of this disclosure provides a kind of receiving side signal for avoiding cochannel to interfere within the physical layer
Method may include: to judge whether the energy intensity of signal is greater than predetermined threshold；And it is greater than in advance in response to the energy intensity of signal
Determine threshold value, receiver reset and signal is received by receiver.
It in one embodiment, can also include: to take absolute value before the judgement to the energy intensity of signal, as
The energy intensity of signal.
It in another embodiment, can also include: that low pass filtered is carried out to the energy intensity of signal before the judgement
Wave.
In a further embodiment, the judgement may include: judge the energy intensity of signal in predetermined time window whether
Greater than predetermined threshold.
In a further embodiment, can also comprise determining that automatic growth control state in predetermined time period whether
Stablize；And stablize in predetermined time period in response to automatic growth control state, and the energy intensity of signal is greater than predetermined
Threshold value reset to receiver and receives signal by receiver.
In a further embodiment, it may include: possible ongoing in stopping receiver for reset to receiver
The reception of other signals in cochannel operates.
In a further embodiment, this method, which can be, realizes in the physical layer of narrow radio frequency receiver.
In addition, another aspect of the disclosure provides a kind of signal reception dress for avoiding cochannel to interfere within the physical layer
It sets, may include: energy intensity judging unit, be configured as judging whether the energy intensity of signal is greater than predetermined threshold；And
Reset cell, the energy intensity for being configured to respond to signal are greater than predetermined threshold, are reset to receiver and pass through reception
Device receives signal.
In one embodiment, it can also include: the unit that takes absolute value, be configured as the energy before judgement to signal
Intensity takes absolute value, the energy intensity as signal.
In another embodiment, it can also include: low-pass filter, be configured as the energy before judgement to signal
Intensity carries out low-pass filtering.
In a further embodiment, energy intensity judging unit can be configured to judge the energy intensity of signal
Whether it is greater than predetermined threshold in predetermined time window.
In a further embodiment, it can also include: automatic growth control status determining unit, be configured to determine that automatic
Whether gain control state is stable in predetermined time period, and wherein reset cell is configured in response to automatic gain
State of a control is stablized in predetermined time period, and the energy intensity of signal is greater than predetermined threshold, is reset simultaneously to receiver
Signal is received by receiver.
In a further embodiment, the operation reset to receiver in reset cell may include: to stop receiving
The reception operation of other signals in device in possible ongoing cochannel.
In a further embodiment, which, which can be, realizes in the physical layer of narrow radio frequency receiver.
In addition, the another aspect of the disclosure provides a kind of user equipment, including received according to signal as described above
Device；And antenna, for receiving the signal from wirelessly or non-wirelessly channel.
By being received as priority to the signal of cochannel transmitting simultaneously using the energy intensity of signal, significantly reduce
Packet Error Ratio.
Detailed description of the invention
The disclosure includes attached drawing, is further understood for providing to exemplary embodiment, these attached drawings constitute explanation
A part of book, for describing exemplary embodiment.
In attached drawing:
Fig. 1 shows the stream of the signal acceptance method for avoiding cochannel to interfere within the physical layer according to the embodiment of the present disclosure
Cheng Tu；
Fig. 2 shows showing according to the signal receiving device within the physical layer avoiding cochannel from interfering of the embodiment of the present disclosure
Meaning property block diagram；
Fig. 3 shows the schematic diagram of the signal receiving device of the specific embodiment according to the disclosure；
Fig. 4, which schematically illustrates to be benefited from exemplary embodiment of the invention and can be used to implement the present invention, to be shown
The block diagram of the mobile terminal of example property embodiment；And
Fig. 5 shows the simulation result of the signal receiving device of the specific embodiment according to the disclosure.
Specific embodiment
The specific embodiment of the disclosure will be hereafter described in more detail.Although it should be understood that described in hereafter
Embodiment is mostly directed to ZigBee technology, but embodiment of the disclosure is not restricted to this, applies also for other communication technologys
And agreement.
Fig. 1 shows the stream of the signal acceptance method for avoiding cochannel to interfere within the physical layer according to the embodiment of the present disclosure
Cheng Tu.
As shown in Figure 1, judging whether the energy intensity of signal is greater than predetermined threshold in step S101.Here, the energy of signal
Amount intensity can be an opposite numerical value, unit dB, it is preferable that 6dB.For example, the energy intensity of weaker signal is set as base
Quasi- value " 1 ", the then energy intensity for the signal that will be judged are set as n times of " 1 ".3 it is when predetermined threshold takes, if such as n is 2,
Then the energy intensity of signal is not more than predetermined threshold, and if such as n is 4, the energy intensity of signal is greater than predetermined threshold.
Alternatively, the sum of the energy intensity of the energy intensity of a signal and the energy intensity of signal signal adjacent thereto can also be used
Ratio judge the energy intensity of the signal and the size relation of predetermined threshold.Certainly, energy intensity at this time is still phase
Pair numerical value.Alternatively, the energy intensity of signal can also be an absolute numerical value, for example, a certain voltage level.
Then, in step S103, it is greater than predetermined threshold in response to the energy intensity of signal, receiver is reset and is led to
It crosses receiver and receives signal.Here it is possible to judge whether the energy intensity of signal is greater than predetermined threshold in predetermined time window.Such as
The energy intensity of the fruit signal is greater than the predetermined threshold, then carries out receiver resetting and receive signal.And for being reset
Operation, in one example, is specifically as follows, and stops connecing for other signals in receiver in possible ongoing cochannel
It brings drill to an end work.
In one embodiment, signal acceptance method shown in FIG. 1 can also include: before step S101, to signal
Energy intensity take absolute value, the energy intensity as signal.
In another embodiment, signal acceptance method shown in FIG. 1 can also include: before step S101, to letter
Number energy intensity carry out low-pass filtering.It is of course also possible to first take absolute value to the energy intensity of signal, then carry out low pass filtered
Wave.
In a further embodiment, signal acceptance method shown in FIG. 1 can also comprise determining that automatic growth control
(AGC) whether state is stable in predetermined time period；And in response to automatic growth control state in predetermined time period
Stablize, and the energy intensity of signal is greater than predetermined threshold, receiver reset and signal is received by receiver.
That is, being greater than predetermined threshold (for example, 4-100 μ S) in a time window in the energy intensity for determining signal
Meanwhile automatic growth control state is also predefined and tends towards stability within a period of time (for example, 8-200 μ S).When the two condition is equal
When meeting, it can reset receiver and receive signal.
By determining that the energy intensity of signal is greater than predetermined threshold whithin a period of time, it is unlimited in receiver to reduce
The influence of the step pulse response of impulse response (IIR) filter or the influence of other kinds of interference (WiFi, bluetooth etc.)；
And by determining that AGC state is stable whithin a period of time, the false triggering of PIP mechanism can be will lead to avoid unstable AGC
Situation.
Optionally, carrying out resetting to receiver may include: to stop in receiver in possible ongoing cochannel
The reception of other signals operates.
Optionally, this method, which can be, realizes in the physical layer of narrow radio frequency receiver.
Fig. 2 shows the signal receiving devices 200 for avoiding cochannel to interfere within the physical layer according to the embodiment of the present disclosure
Schematic block diagram.As shown in Fig. 2, the signal receiving device 200, may include: energy intensity judging unit 201, is configured
To judge whether the energy intensity of signal is greater than predetermined threshold；And reset cell 203, it is configured to respond to the energy of signal
Intensity is greater than predetermined threshold, reset to receiver and receives signal by receiver.By energy intensity with signal (and
It is not the time) it is priority to be received to the signal of cochannel transmitting simultaneously, to reduce Packet Error Ratio.Certainly, in order to
The performance for further promoting reception device, can also implement as described below more specifically embodiment.
Fig. 3 shows the schematic diagram of the signal receiving device 300 according to the specific embodiment of the disclosure.As shown in figure 3, removing
Outside energy intensity judging unit 301, reset cell 303, signal receiving device 300 can also include: the unit 305 that takes absolute value,
It is configured as taking absolute value to the energy intensity of signal before judgement, the energy intensity as signal；Low-pass filter 307,
It is configured as carrying out low-pass filtering to the energy intensity of signal before judgement；Automatic growth control status determining unit 309, with
Energy intensity judging unit 301 parallel be arranged, be configured to determine that automatic growth control state in predetermined time period whether
Stablize.
In the example shown in fig, 3, low-pass filter 307 is by two multipliers, an adder and a time delay module
Composition, for removing the burr occurred once in a while in signal, to avoid the interference to the subsequent processing of signal.In other examples
In, low-pass filter can use other embodiments, not be construed as limiting the invention.
In addition, for the automatic growth control status determining unit 309 that signal receiving device 300 is added, reset cell 303
It can be additionally configured to stablize in predetermined time period (for example, 8-200 μ S) in response to automatic growth control state, and signal
Energy intensity be greater than predetermined threshold in the scheduled time window (for example, 4-100 μ S), receiver reset and by connecing
It receives device and receives signal.
By determining that the energy intensity of signal is greater than predetermined threshold whithin a period of time, it is unlimited in receiver to reduce
The influence of the step pulse response of impulse response (IIR) filter or the influence of other kinds of interference (WiFi, bluetooth etc.)；
And by determining that AGC state is stable whithin a period of time, the false triggering of PIP mechanism can be will lead to avoid unstable AGC
Situation.
Below with reference to Fig. 4, it illustrates the schematic frames for the mobile terminal 400 for being suitable for being used to practice embodiment of the present invention
Figure.In the example depicted in fig. 4, mobile terminal 400 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 400 includes one or antenna 418, is operationally led to transmitter 414 and receiver 416
Letter.Mobile terminal 400 further includes processor 412 or other processing elements, provide respectively the signal for going to transmitter 414 and
Receive the signal from receiver 416.Signal include according to the signaling information of the air-interface standard of appropriate cellular system, and
It further include the data that user speech, received data and/or user generate.In this regard, mobile terminal 400 can utilize one
Or multiple air interface standard, communication protocols, modulation type and access style are operated.As demonstration, mobile terminal
400 can be grasped according to any agreement in multiple first generation, the second generation, the third generation and/or forth generation communication protocol etc.
Make.For example, mobile terminal 400 can be according to the second generation (G) wireless communication protocol IS-136 (TDMA), GSM and IS-95
(CDMA) it is operated, or is wirelessly communicated according to the third generation (G) of such as UMTS, CDMA2000, WCDMA and TD-SCDMA
Agreement is operated to be operated, or according to forth generation (4G) wireless communication protocol and/or similar agreement.
It is appreciated that processor 412 includes circuit needed for realizing the function of mobile terminal 400.For example, processor 412
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 400 and signal processing function distribute therebetween according to the respective ability of these equipment.Processor 412
It thus can also include the function of carrying out convolutional encoding and intertexture to message and data before modulation and transmission.Processor 412
Internal voice coder can also be also comprised, and may include internal data modem.
Receiver 416 in mobile terminal 400 can also include: energy intensity judging unit, be configured as judging signal
Energy intensity whether be greater than predetermined threshold；And reset cell, the energy intensity for being configured to respond to signal, which is greater than, to be made a reservation for
Threshold value reset to receiver 416 and receives the signal by receiver 416.
Mobile terminal 400 can also include user interface, such as may include earphone or loudspeaker 424, ringer
422, microphone 426, display screen 428 and handwriting equipment 431, all these equipment are both coupled to processor 412.Mobile terminal
400 may include keypad 430.Keypad 430 may include traditional number key (0-9) and relative keys (#, *), and be used for
Operate other keys of mobile terminal 400.Alternatively, keypad 430 may include traditional QWERTY keypad arrangement.Keypad
430 can also include various soft keys associated with function.Mobile terminal 400 can also include acceleration induction module 436, use
In the movement (movement) that capture user makes.
Specifically, display screen 428 may include touch-screen and/or neighbouring formula screen, and user can be by directly grasping
Make screen and operates mobile terminal 400.At this point, display screen 428 functions simultaneously as both input equipment and output equipment.Such
In embodiment, handwriting equipment 431 may be configured to receive user for example, by common pen, dedicated stylus and/or finger
The input provided on display screen 428, including give directions input and gesture input.
In addition, mobile terminal 400 may include such as control stick interface equipment or other for input interface.It is mobile
Terminal 400 further includes battery 434, such as vibrating battery group, for powering for various circuits needed for operation mobile terminal 400,
And mechanical oscillation are optionally provided as detectable output.
Mobile terminal 400 may further include Subscriber Identity Module (UIM) 438.UIM 438 is usually to have built-in place
Manage the memory devices of device.UIM 438 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..UIM 438 is commonly stored and mobile subscriber phase
The cell of pass.
Mobile terminal 400 can also have memory.For example, mobile terminal 400 may include volatile memory 440,
Volatile random access memory (RAM) for example including the cache area for data temporary storage.Mobile terminal 400
It can also include other nonvolatile memories 442, can be Embedded and/or moveable.Nonvolatile memory
442 can additionally or alternatively include such as EEPROM and flash memory.Memory can store mobile terminal 400 and be used
Multiple pieces of information and data in Arbitrary Term, to realize the function of mobile terminal 400.
The mobile terminal 400 may be implemented above in association with Fig. 1 method described and be configured to retouch as in conjunction with Fig. 2
The equipment stated.
It should be appreciated that structural block diagram described in Fig. 4 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.
Fig. 5 shows the simulation result of the signal receiving device of the specific embodiment according to the disclosure.As shown in figure 5, imitative
Horizontal axis in true diagram indicates interfering energy grade, is previous signal and the latter in two signals for occur cochannel interference
The ratio of the energy of signal, unit dB, that is, the value is smaller, and the energy of latter signal is bigger.The longitudinal axis table of simulated views
Show Packet Error Ratio (or being frame error rate, FER), the Packet Error Ratio at the top of the longitudinal axis is 100, i.e., 100%.
In Fig. 5, the curve that empty box indicates is signal receiving device in the prior art (that is, without using the disclosure
PIP mechanism) Packet Error Ratio simulation curve, the curve that real box indicates is the signal receiving device of the specific embodiment of the disclosure
The Packet Error Ratio simulation curve of (that is, using the PIP mechanism of the disclosure).
From fig. 5, it is seen that interfering energy grade is at -12 to -8dB, that is, be much larger than in the energy of latter signal
When the energy of previous signal, the Packet Error Ratio of signal receiving device in the prior art is in always 100%, i.e., in this case
It is unlikely to receive any one of the two signals signal.And the Packet Error Ratio of the signal receiving device of the disclosure is minimum, drops
Down to 1% hereinafter, reducing Packet Error Ratio significantly, signal receiving quality is improved.
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 (11)
1. the signal acceptance method that one kind avoids cochannel from interfering within the physical layer, wherein during receiver receives the first signal
It was found that second signal reaches the receiver, which comprises
Judge whether the energy intensity of the second signal is greater than predetermined threshold；
Determine whether automatic growth control state is stable in predetermined time period；And
It is greater than the predetermined threshold in response to the energy intensity of the second signal, and the automatic growth control state is described
Stablize in predetermined time period, stops the receiver and operate the reception of first signal and pass through the receiver to receive
The second signal.
2. according to the method described in claim 1, further include:
It before the judgement, takes absolute value to the energy intensity of the second signal, the energy as the second signal is strong
Degree.
3. according to the method described in claim 1, further include:
Before the judgement, low-pass filtering is carried out to the energy intensity of the second signal.
4. according to the method described in claim 1, wherein the judgement includes:
Judge whether the energy intensity of the second signal is greater than the predetermined threshold in predetermined time window.
5. according to the method described in claim 1, wherein the method is realized in the physical layer of narrow radio frequency receiver.
6. the signal receiving device that one kind avoids cochannel from interfering within the physical layer, wherein receiving the in the signal receiving device
Find that second signal reaches the signal receiving device during one signal, the signal receiving device includes:
Energy intensity judging unit, is configured as judging whether the energy intensity of the second signal is greater than predetermined threshold；
Automatic growth control status determining unit, be configured to determine that automatic growth control state in predetermined time period whether
Stablize；And
Reset cell, the energy intensity for being configured to respond to the second signal are greater than the predetermined threshold, and described automatic
Gain control state is stablized in the predetermined time period, stops reception of the signal receiving device to first signal
It operates and the second signal is received by the signal receiving device.
7. device according to claim 6, further includes:
Take absolute value unit, is configured as taking absolute value to the energy intensity of the second signal before the judgement, as
The energy intensity of the second signal.
8. device according to claim 6, further includes:
Low-pass filter is configured as carrying out low-pass filtering to the energy intensity of the second signal before the judgement.
9. device according to claim 6, wherein the energy intensity judging unit is configured to described in judgement
Whether the energy intensity of second signal is greater than the predetermined threshold in predetermined time window.
10. device according to claim 6, wherein described device is realized in the physical layer of narrow radio frequency receiver
's.
11. a kind of user equipment, including
The signal receiving device according to any one of claim 6 to 10；And
Antenna, for receiving first signal and the second signal from wirelessly or non-wirelessly channel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201461990909P | 2014-05-09 | 2014-05-09 | |
| US61/990,909 | 2014-05-09 |
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| Publication Number | Publication Date |
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| CN105897300A CN105897300A (en) | 2016-08-24 |
| CN105897300B true CN105897300B (en) | 2019-05-07 |
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| CN201510208410.XA Expired - Fee Related CN105897300B (en) | 2014-05-09 | 2015-04-28 | Signal acceptance method, device and the user equipment for avoiding cochannel to interfere within the physical layer |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10177810B2 (en) * | 2016-09-02 | 2019-01-08 | Marvell World Trade Ltd. | Systems and methods for echo or interference cancellation power-saving management in a communication system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1175874A (en) * | 1996-07-17 | 1998-03-11 | 松下电器产业株式会社 | CDMA system mobile communication receiver |
| CN1695384A (en) * | 2002-04-29 | 2005-11-09 | 摩托罗拉公司 | Method and apparatus to reduce uplink compressed mode monitoring in a communication device |
| CN102415123A (en) * | 2009-04-21 | 2012-04-11 | 皇家飞利浦电子股份有限公司 | Device and method for detecting channel state |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140011616A (en) * | 2012-07-18 | 2014-01-29 | 삼성전자주식회사 | Apparatus and method for controlling a network connection of wireless terminal |
-
2015
- 2015-04-28 CN CN201510208410.XA patent/CN105897300B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1175874A (en) * | 1996-07-17 | 1998-03-11 | 松下电器产业株式会社 | CDMA system mobile communication receiver |
| CN1695384A (en) * | 2002-04-29 | 2005-11-09 | 摩托罗拉公司 | Method and apparatus to reduce uplink compressed mode monitoring in a communication device |
| CN102415123A (en) * | 2009-04-21 | 2012-04-11 | 皇家飞利浦电子股份有限公司 | Device and method for detecting channel state |
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