CN105391460A - Receiver, transceiver and method for receiving signal - Google Patents
Receiver, transceiver and method for receiving signal Download PDFInfo
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- CN105391460A CN105391460A CN201510288838.XA CN201510288838A CN105391460A CN 105391460 A CN105391460 A CN 105391460A CN 201510288838 A CN201510288838 A CN 201510288838A CN 105391460 A CN105391460 A CN 105391460A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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Abstract
A receiver (100; 200; 260; 300; 520) for receiving a signal includes: a separator (104; 240) which is configured to separate a leakage signal component (112) of the received signal (102); a mixer (106; 206 ) which is configured to mix the received signal (102) to a baseband signal (114) through a local oscillator signal (116); an auxiliary mixing circuit (108) is configured to mixing the leakage signal component (112) into a compensation signal (118) at a position of the leak signal component in the baseband signal; and a compensator (110; 250) is configured to reduce a contribution of the leakage signal component (112) in the baseband signal (114) through the compensation signal (118).
Description
Technical field
Example described by the disclosure relates to a kind of receiver, transceiver and the method for Received signal strength.
Background technology
Receiver for Received signal strength is widely used, such as, for mobile communication equipment.Receiver is for rebuilding a signal such as modulated on high frequency or radio-frequency carrier.By modulation signal demodulation or be mixed down to a baseband signal, the wherein information that sent by high frequency carrier of base band signals carry.Then demodulated base band signal provides information itself.For suitable Signal reception, Received signal strength can be successfully vital by down-conversion or lower mixing in the receiver.Error in lower optical mixing process may make the signal to noise ratio (SNR) of baseband signal reduce.In lower optical mixing process, noise source may have a lot, and such as, in Received signal strength, lower mixing enters or close to the unwanted signal component of base band.Other extra noise sources can be by the non-linear intermodulation distortion caused of frequency mixer, amplifier or miscellaneous part in signal transacting link.
Although there is certain methods to improve the signal to noise ratio of the baseband signal produced by receiver, this receiver is done the best the impact of the error signal in analog synthesis baseband signal, but still thirsts for improving further quality or the signal to noise ratio of the baseband signal being produced by receiver or provide.
Accompanying drawing explanation
Some embodiments of described device and/or method will only be described with reference to accompanying drawing below by way of example, wherein
Fig. 1 shows the block diagram of a receiver example;
Fig. 2 shows the schematic diagram of another receiver example;
Fig. 3 shows the schematic diagram of another receiver example;
Fig. 4 shows the schematic diagram of another receiver example;
Fig. 5 shows a kind of flow chart of Received signal strength method example; And
Fig. 6 shows the mobile communication equipment example comprising transceiver described according to the present embodiment.
Embodiment
To describe more all sidedly multiple embodiment referring now to the accompanying drawing shown in some embodiments, in the drawings, the thickness in line, layer and/or region can amplify in order to clear.
Therefore, although further embodiment can have various amendment and replacement form, some embodiments are be introduced by way of example in the drawings, and will be described in detail in this article.But should be appreciated that, being not intended restriction embodiment is particular forms disclosed, but on the contrary, further embodiment contains all modifications within the scope of the disclosure, equivalent and replacement.Identical numbering refers to the same or similar element described in institute's drawings attached.
Should be appreciated that it directly can connect or be coupled to another element, or there is intermediary element when an element relates to " connection " or " coupling " to another element.On the contrary, " when being directly connected " or " directly coupled " to another element, there is not intermediary element when an element relates to.Should explain in a similar manner for describing other word of relation between element.
Term used herein is only for describing specific embodiment, instead of the restriction disclosure.As used herein, singulative " ", " one " and " being somebody's turn to do " also comprise plural form, unless clearly indicated in addition in context.Be appreciated that further, when using the term such as " comprising ", " comprising ", " having " and/or " containing " in this manual, illustrate to there is this feature, integer, step, operation, element and/or assembly, and do not get rid of one or more further feature, integer, step, operation, element, assembly and/or its existence of combining or increase.
Unless otherwise defined, otherwise the implication of all terms used herein is identical with the implication that disclosure those of ordinary skill in the field understand.Can understand further, the implication that the term as defined in common dictionary has should be identical with the implication in association area context, and can not by idealized or too formalized understanding, unless be clearly defined here.
Fig. 1 shows receiver 100 example for Received signal strength 102, such as, by antenna assembly received RF signal.
Described receiver comprises separator 104, frequency mixer 106, auxiliary mixting circuit 108 and compensator 110.In this specific embodiment, this auxiliary mixting circuit 108 is realized by frequency mixer.Described separator 104 is configured to from Received signal strength 102, isolate the leakage signal component 112 be included in Received signal strength 102.That is, leaked by any mechanism or contribute to a signal component of Received signal strength 102, being separated from described Received signal strength 102 by the device of described separator 104.Such as, described leakage signal component 112 may be such as because the crosstalk of miscellaneous part in receiver 100 produces, or due near receiver 100 other electronic components crosstalk produce, described crosstalk be added to via antenna receive Received signal strength 102 on.Frequency mixer 106 is configured to use local oscillator signals 116 that described Received signal strength 102 is mixed down to baseband signal 114, and is configured to provide described baseband signal 114.Described auxiliary mixting circuit 108 is configured to described leakage signal component 112 to be mixed down to compensating signal 118, and the position of this compensating signal 118 leakage signal component in described baseband signal 114 provides.In baseband signal, compensating signal occupies the frequency band identical with leakage signal component.
Described compensator 110 is configured to use described compensating signal 118 to reduce the contribution of leakage signal component 112 in baseband signal 120, to provide the baseband signal 120 of enhancing, the baseband signal 114 of this enhancing can make the contribution of unwanted leakage signal component 112 reduce, and thus has better signal to noise ratio.
According to some embodiments, described auxiliary mixting circuit uses the frequency information of leakage signal component 112 and the frequency information not needing component of local oscillator signals 116, described leakage signal component 112 is mixed down to the compensating signal 118 of the position of leakage signal component in described baseband signal.
Example described in the disclosure can provide the possibility effectively compensating the undesirable leakage signal component 112 existed on Received signal strength 102, by being separated or isolating the leakage signal component 112 in parallel with the lower mixing of Received signal strength 102, this undesirable leakage signal component is presented in Received signal strength 102.The leakage signal component 112 be separated is mixed to leakage signal component 112 by independent underground and resides in frequency place in baseband signal 114.Subsequently, the compensating signal 118 from leakage signal component 112 is used to make compensation or the leakage signal component 112 reduced in baseband signal 114 become feasible.This method can reduce complexity compared with conventional method, and conventional method is the priori of frequency based on leakage signal component and possible further feature, attempts estimating the impact to received signal of leakage signal component.And embodiment described herein employs the leakage signal component 112 itself provided by separator 104.This can save the computation complexity of the possible non-linear or decay of multiple parts in estimating received signal chain, even if otherwise when the signal leaking into Received signal strength is known, this non-linear or decay also must simulate, wherein, in radio frequency transceiver, the situation that signal may leak into Received signal strength path is such as sent.Direct use compromising emanation signal or leakage signal component can save the complicated complexity estimating these impacts.In addition, because taken into full account the impact of non-linear factor together with issuable long-term or temperature correlation, leakage signal component itself has been used can to provide better result.
According to some embodiments in the receiver or transceiver of radio-frequency (RF) communication system, local oscillator signals 116 corresponds to the receive frequency of receiver, and leakage signal component 112 corresponds to the tranmitting frequency transmitted in radio-frequency (RF) communication system.Compared with conventional method, compromising emanation signal can be compensated more in high quality.
According to some examples, the frequency of component that do not need of local oscillator signals 116 corresponds to the receive frequency of receiver 100 further.Use the example that the disclosure describes, allow the extra leakage signal component 112 do not needed in frequency component existed in compensating local oscillator signal 116, wherein local oscillator signals 116 is for being mixed down baseband signal 114 by under described Received signal strength.Even if when undesired signal component and leakage signal component 112 mixing close to local oscillator frequency signal is to make leakage signal component be mixed to for 112 times or close to base band, it also can allow compensation leakage signal component 112.Specifically, in following situation, the frequency of component that do not need of local oscillator signals 116 is identical with the frequency of leakage signal component 112, and wherein leakage signal component 112 is exactly the compromising emanation signal of radio-frequency (RF) transceiver.Conversely, this situation may occur in the receiver supporting at present carrier aggregation, that is, two different carrier waves or receive frequency receives while information and needs to use at least two different local oscillator signals in this receiver.If a local oscillator signals is harassed or leaks into other local oscillator signals, the frequency of two local oscillator signals may be provided to the input of frequency mixer to be mixed down baseband signal by under Received signal strength.Therefore, this specific features of harassing signal shows as with continuous wave (CW) burr is feature.When the frequency of described multiple local oscillator signals is different and when depending on certain operational modes, the leakage signal component transmitted and the close situation of the undesired signal component of local oscillator signals may recur or occur once in a while.This may cause producing a signal component produced due to unwanted signal component mixing in modulate emission signal and local oscillator signals in baseband signal, so that described signal component may reduce the signal to noise ratio of baseband signal and the quality of Received signal strength.Example according to the present disclosure, also can reduce the contribution of leakage signal component 112 in baseband signal 114 under those scenes.
In some instances, separator 104 is arranged between frequency mixer 106 and compensator 110, so that leakage signal component 112 is separated after the frequency mixer 106 for the production of baseband signal like this.This can allow the non-linear factor automatically considering to be comprised by frequency mixer 106.Frequency (the T that emission signal frequency TX deducts local oscillator frequencies LO is mixed under leakage signal component that will be separated
x– LO), it is frequency D.In order to reside in the frequency place of baseband signal at leakage signal component, namely at D-SO place, receive leakage signal component 112, one is used to have the leakage signal component 112 of mixing at frequency D place under the mixed frequency signal that frequency is 2D-SO, consequently leakage signal component is positioned on required frequency D-SO, because 2D-SO-D=D-SO.Be mixed to the leakage signal component 112 of appropriate frequency for representing compensating signal 118.
According to some examples, auxiliary mixting circuit 108 for lower mixing leakage signal component 112 is configured to, use and there is leakage signal component 112 described in mixing under the mixed frequency signal that frequency is 2D-SO, wherein 2D-SO is that the duplex distance (D) of 2 times deducts a pseudo-skew (SO, spuriousoffset).Duplex distance (D) is defined as the difference between emission signal frequency TX and local oscillator frequencies LO, and wherein emission signal frequency TX equals the frequency of leakage signal component 112.Described puppet skew or pseudo-distance refer to the difference do not needed between the frequency of component and the standard frequency of local oscillator signals 116 of local oscillator signals 116.In the process of undesired signal component and the mixing of leakage signal component, be mixed to a frequency under the signal produced, this frequency corresponds to the difference between emission signal frequency TX and the frequency SP (frequency of continuous wave burr) not needing component of local oscillator signals.The lower mixing frequencies of the leakage signal component 112 produced becomes TX – SP=(LO+D)-(LO+SO), has namely been mixed to the frequency corresponding to D – SO under leakage signal.Therefore, when on leakage signal component is added to baseband signal 102, provides described leakage signal component 112 and compensating signal 118 at just in time identical frequency place, efficient and high-quality compensation can be carried out to unwanted leakage signal component 112 like this.
According to some examples, the compensation of leakage signal component 112 is realized in the digital domain.For this reason, some embodiments comprise the main analog to digital converter of digitalized baseband signal 114, and the submodule transducer of digitized compensation signal 118, so that this compensator operates on baseband signal and compensating signal digitlization performance.
According to some embodiments, described compensator 110 comprises equalizer, and to mate baseband signal 114 and compensating signal 118, and comprise adder, it is configured to the compensating signal deducting coupling from baseband signal, to compensate the leakage signal component in baseband signal.Equalizer is used for the phase place adjusted between baseband signal 114 and compensating signal 118 and do not mate and do not mate with amplitude, and described coupling is caused by indivedual transfer functions of the assembly for the treatment of baseband signal 114 and compensating signal 118.
According to some examples, carrier aggregation operator scheme supported by described receiver, namely receives the information of the first Received signal strength corresponding to the first local oscillator frequencies and the other Received signal strength corresponding to other local oscillator frequencies simultaneously.For this reason, receiver can also comprise another frequency mixer, is configured to use another local oscillator signals to be mixed down baseband signal by under Received signal strength.
According to some examples, the leakage signal component 112 of separation is also for compensating the second order inter-modulation error introduced at the leakage signal component 112 by frequency mixer.For this reason, some embodiments also selectively comprise envelope detector, are configured to the envelope detecting compensating signal, and envelope adjuster, are configured to the contribution reducing compensating signal envelope in baseband signal 114.
Fig. 2 illustrates the particular example of a receiver 200, and it may be used for the contribution reducing leakage signal component 112 in baseband signal.Below suppose that shown in Fig. 2, receiver is the part supporting transceiver in carrier mode paradigmatic system, so that leakage signal component 112 is relevant to the modulated transmission signal TX leaking into receiver.The component 218 that do not need of local oscillator signals 116 allows receiver to support the crosstalk of another local oscillator signals of carrier aggregation corresponding to using in the receiver.The component 218 that do not need of local oscillator signals 116 is also expressed as with continuous wave burr (CW burr).
In the figure 2 example, used before local oscillator signals 116 carries out process Received signal strength 102 by frequency mixer 206, low noise amplifier 230 is provided for having the Received signal strength 102 contributed from leakage signal component 112 and unwanted signal component 202, wherein leakage signal component 112 is due to transmit signal leakage generation, unwanted signal component 202 is produced by receiver apparatus 200, this local oscillator signals 116 has the signal component at local oscillator frequencies 216 place, with the unwanted signal component 218 that leakage or the crosstalk of the continuous wave burr due to another local oscillator signals produce.
For following consideration, duplex distance D represents the difference between emission signal frequency and local oscillator frequency (required reception carrier frequency).In addition, described burr skew SO represents the difference do not needed between the frequency of component (burr) 218 and local oscillator frequencies 216 of local oscillator signals 116.
When unwanted signal component 218 and leakage signal component 112 mixing, lower mixing results resides in frequency D – SO.After frequency mixer 206, leakage signal component 112 is also mixed to frequency D down, as shown in Figure 2.High pass filter 240a after frequency mixer 206 and low pass filter 240b can as separator 240, so that the leakage signal component of Received signal strength 102 is separated from baseband signal 114, baseband signal 114 has superposition leakage signal component 112 thereon, and it is owing to producing with unwanted signal component 218 mixing of local oscillator signal 116.In the example as shown in fig. 2, separator 240 also comprises a low pass filter 240b, and baseband signal is separated at duplex distance D by it from the lower mixing of leakage signal component 112.
After separator 240, baseband signal 114 has superposition undesirable leakage signal component thereon, and it can be separated by high pass filter 240a the leakage signal component 112 being for further processing to compensate in baseband signal 114.After high pass filter 240a, leakage signal component 112 resides in the frequency place corresponding to duplex distance D.
In the illustrated example shown in fig. 2, further process is carried out in the digital domain.This receiver 200 comprises the main analog to digital converter 242 of digitalized baseband signal 114, and the submodule transducer 244 of leakage signal component 112 that digitlization is provided by separator 240.
Auxiliary mixting circuit 108 uses the oscillator frequency equaling 2D – SO to carry out lower mixing leakage signal component 112, to afford redress signal 118 at the frequency D – SO place that described undesirable leakage signal component resides in baseband signal 114.
After performed suitable amplitude and phase place adjustment by equalizer 250a, from baseband signal 114, deduct compensating signal 118 by adder 250b thus provide the expression of baseband signal 220, this baseband signal has better characteristics of signals and better signal to noise ratio than the baseband signal 114 after frequency mixer 206.
Before baseband signal 114 and compensating signal 118 are subtracted each other, namely before the contribution reducing leakage signal component in baseband signal, equalizer 250a can regulate or correct phase place and the amplitude of baseband signal and compensating signal.When analog to digital converter 242 and 244 in the signal path of baseband signal 114 and compensating signal 118 and other possible signal processing units have different transfer functions or fellow, need adjustment or the coupling of the amplitude of carrying out and phase place.The characteristic of equalizer 250a can be the priori based on the transfer function of associated components in receiver 200, or can adjust according to the monitoring of receiver 200 associated components amplitude and phase place.
In other words, examples more of the present disclosure receive modulated compromising emanation signal after this Received signal strength frequency mixer, and convert this signal to numeric field.The compromising emanation signal of conversion is digitized underground mixing, and for eliminating the impact of modulation burr, namely reduces the contribution of leakage signal component in baseband signal.This can be used for the impact partly compensated because local oscillator side continuous wave burr causes, and modulated the transmitting of wherein continuous wave burr and being reduced the signal to noise ratio of Received signal strength carries out lower mixing.Such as, when to look genuine (spurious) or burr causes due to other local oscillator signals under Received signal strength carrier aggregation mode, there will be the problems referred to above.It is own that some examples use leakage to transmit, instead of it estimated signal.The advantage using leakage signal itself to have is that it is because power amplifier and all non-linear of duplexer cause.Such as, it can be saved and estimate these effects and the complexity in receiver modulation leakage signal.This modulated burr is eliminated and modulate emission signals leakiness can be avoided to receiver, and it may represent a subject matter of snr of received signal.The duplexer filter used at receiver input can significantly suppress to send signal itself.But, when using multiple clock support carrier aggregation mode, the frequency close to duplex frequency may be produced at the CW burr of LO side.This burr can mix mutually with leaking into transmitting of receiver, and its result receives in required base band frequency.The information sending signal properties about frequency and transmitter side can be had.But, the nonlinear impact of this isolation transfer function being subject to power amplifier and duplexer to a great extent that transmits.Therefore, when the compromising emanation signal of described reception is separated or when receiving at receiver-side, signal to noise ratio can be strengthened, then in order to eliminate the unwanted modulated burr effect in base band.In other words, the reception transmitted and elimination can be summarized as four steps.First step, transmit is separated from Received signal strength.Second step, transmitting is digitized by a transducer, and this gives enough signal to noise ratios at duplex frequency place.Third step, transmits and is digitized underground mixing.4th step, adjusts phase place and the amplitude of this signal, and then adjusted signal finally transmits for eliminate in main path unwanted.
Separator for separating of leakage signal component can use the combination of low pass filter and high pass filter, such as, as shown in Figure 2 and Figure 4.Another kind method is after the first integrator of the analog-to-digital conversion device for digitalized baseband signal, be separated transmitting and receiving signal.According to another embodiment, can use other implementations of separator, it can be separated leakage signal component from baseband signal.Digitlization uses the 2nd ADC, i.e. auxiliary ADC.This ADC can be the ADC of high bandwidth, has good signal to noise ratio to make to transmit at duplex distance place, and namely at higher frequency place, such as, a few megahertz is to tens megahertzes or higher.When there is when transmitting higher amplitude, high resolution A/D C for leakage signal component digitlization be a suitable selection.
Lower mixing can use digital clock frequencies to realize.Clock frequency should be adjusted to the difference between the burr skew of 2 times of duplex distance and receive frequency.
Use the priori of main and auxiliary path transmission function simultaneously, described amplitude and phase difference value can be adjusted by equalizer.Finally, transmitting of producing in bypass footpath can be used to eliminate the unwanted burr that transmits on main path.For this reason, main signal should be designated as the signal path of process baseband signal, and auxiliary signal path should be designated as the signal path of process compensating signal.
Fig. 3 shows about another example of receiver 260, and this example is owing to generating compensating signal 118, and different from the example of Fig. 2.Therefore, the following Short Description of Fig. 3 focuses on the difference of Fig. 1 to avoid too much description.As shown in Figure 3, compensating signal 118 is provided by auxiliary mixting circuit 108, and this auxiliary mixting circuit 108 comprises auxiliary mixer 122 and frequency shifter 126.This auxiliary mixer 122 is configured to use described tranmitting frequency that Received signal strength is mixed down M signal 124 102 times.This frequency shifter 126 is configured to the position of the leakage signal component by digitized M signal 124 being displaced to baseband signal 114, i.e. frequency D-SO, thus the signal 118 that affords redress.In the example of fig. 3, Received signal strength 102 can be split the main signal with frequency mixer 206 and the auxiliary signal path with auxiliary mixting circuit 108 as a node by separator 104.
Fig. 4 illustrates another example of receiver, and it is based on the basic structure of Fig. 2 example, and for compensating the second order inter-modulation effect from compromising emanation signal component.
The fundamental mode of described operation is similar to the operator scheme of Fig. 2 receiver, and therefore following Short Description focuses on the difference with Fig. 2.
Second order inter-modulation effect is caused by such as the non-linear of frequency mixer 206, the low frequency part of the directly proportional second order intermodulation distortion of envelope that the non-linear generation of this frequency mixer and leakage signal component 112 slowly change.When leakage signal component 112 or compromising emanation signal are known or separation, therefore, it also may be used for eliminating second order intermodulation distortion or effect.Meanwhile, recovery transmits or the basic handling of leakage signal component 112 is similar, and the envelope transmitted is processed to compensate the second order intermodulation distortion caused by compromising emanation signal.Therefore, the example described in Fig. 4 comprises envelope detector 310, is configured to the envelope detecting compensating signal 118, and comprises envelope adjuster 320, is configured to the contribution reducing compensating signal 118 envelope in baseband signal.In addition, notice to transmit down and be mixed to duplex distance D.Therefore, auxiliary mixting circuit 108 (auxiliary mixer 108) uses the signal with duplex frequency D to be mixed to base band by under leakage signal component.In other words, when intermodulation distortion compensates, auxiliary mixting circuit 108 is configured to leakage signal component to be mixed down to the component signal that resides in base band place, and this is because the position of the leakage signal component (envelope of compromising emanation signal) that will be corrected resides in base band place.
Similar to the example shown in Fig. 2, envelope adjuster 320 can comprise equalizer 320a, for compensating phase place between described main envelope and auxiliary envelope and amplitude is not mated, and comprise adder 320b, for deducting the envelope of secondary path from baseband signal 114.In other words, the envelope transmitted recovered in secondary path can be used to eliminate the unwanted envelope that transmits, and this unwanted envelope that transmits is produced by the second order intermodulation distortion of (namely in baseband signal) in main signal.
Although the baseband signal error compensation that the intermodulation distortion due to compromising emanation Tx signal and the mixing due to compromising emanation Tx signal and CW burr produce is illustrated as an independent example, but in another example, can executed in parallel two correction.
Fig. 5 shows the method for Received signal strength, and the method comprises the leakage signal component of separation 410 Received signal strength.It is baseband signal that the method also comprises use local oscillator signals by mixing under Received signal strength 412.Mixing under leakage signal component 414 is compensating signal by information on the unwanted component frequencies that the method also comprises information in the frequency using leakage signal component and local oscillator signals.
In addition, the method comprises the contribution that using compensation signal reduces leakage signal component in 416 baseband signals.
According to some embodiments, the method also optionally comprises determines that 420 for the mixed frequency signal frequency of lower mixing leakage signal component.The twice that this frequency is confirmed as duplex distance deduct the distance of positions from.
Fig. 6 shows the mobile communication equipment 500 or mobile phone that comprise transceiver 510 according to disclosure embodiment.Described transceiver 510 comprises the receiver 520 according to previously described any example, and comprise reflector 530, be configured to provide and leak into the modulated of receiver 520 potentially and transmit, this modulated transmitting causes the deterioration of the signal to noise ratio of rebuilding baseband signal.
Although embodiment above has mainly illustrated and explained them may be used for mobile communication system or subscriber equipment, other examples also can realize in other wireless transmission system any.The example of these systems can be the standardized mobile communications network of another 3GPP or mobile communication system.Mobile or wireless communication system may correspond in such as Long Term Evolution (LTE), senior LTE, high-speed packet accesses, universal mobile telecommunications system (UMTS), UMTS Terrestrial radio access network network (UTRAN), evolution UTRAN, Global Systems for Mobile communications, the enhancing data rate of GSM evolvement network, GSM EDGE Radio Access Network network or there is the mobile communications network of various criterion, such as, for the Worldwide Interoperability of inserting of microwave network IEEE802.16 or WLAN (wireless local area network) IEEE802.11, general orthogonal frequency-time multiple access network (OFDMA), Time Division Multiple Access Network, CDMA network (CDMA), wideband CDMA network, frequency division multiple access access network, space division multiple access network etc.In further embodiments, receiver system or tuning circuit also may be used for connecting other wireless communication standard or agreement, as bluetooth, ZigBee etc.
Some embodiments can also provide a kind of computer program with program code for performing said method, wherein perform described computer program on a computer or a processor.Those skilled in the art can easily recognize, the step of above-mentioned various method can be performed by process computer.At this, some embodiments are also intended to contain program storage device, such as digital data storage medium, it is that the machine of a kind of machine or computer-readable and coding can perform or the executable instruction repertorie of computer, and wherein said instruction performs the part or all of step of said method.Program storage device can be, as the magnetic storage medium of digital storage, such as Disk and tape, hard disk drive or optical readable digital data storage medium.Other embodiments are also intended to contain the computer, programmable logic array (PLA) or the programmable gate array (PGA) that perform said method by programming.
Example 1 is the receiver of a Received signal strength, comprising: separator, is configured to the leakage signal component be separated in described Received signal strength; Frequency mixer, is configured to use local oscillator signals to be mixed down baseband signal by under Received signal strength; Auxiliary mixting circuit, is configured to be mixed down the compensating signal residing in leakage signal component positions place in baseband signal under described leakage signal component; And compensator, be configured to the contribution using described compensating signal to reduce leakage signal component in baseband signal.
In example 2, as described in example 1, auxiliary mixting circuit uses the information do not needed in the frequency of component of information in the frequency of leakage signal component and local oscillator signals.
In example 3, the leakage signal component as example 1 and example 2 corresponds to transmitting at tranmitting frequency place in radio-frequency (RF) communication system.
In example 4, the local oscillator signals as example 2 or example 3 corresponds to a receive frequency of receiver; The frequency of component is not wherein needed to correspond to another receive frequency of receiver.
In example 5, the separator as any previous example is arranged between frequency mixer and compensator.
In example 6, auxiliary mixting circuit as example 5 is configured to use leakage signal component as described in mixing under mixed frequency signal, the twice that wherein said mixed frequency signal has a duplex distance deducts the frequency of a pseudo-distance, described duplex distance is the difference between emission signal frequency and local oscillator frequency signal, and described pseudo-distance is the difference do not needed between component frequencies and local oscillator frequency signal.
In example 7, the separator as example 5 and example 6 is also optional comprises high pass filter.
In example 8, the auxiliary mixting circuit as example 3 or example 4 is also optional comprises auxiliary mixer and frequency shifter, and described auxiliary mixer is configured to use described tranmitting frequency to be mixed down M signal by under Received signal strength; The described frequency shifter position be configured to by described M signal being displaced to leakage signal component in baseband signal affords redress signal.
In example 9, the receiver as any previous example is also optional comprises main analog-to-digital conversion device, is configured to digitalized baseband signal; And submodule transducer, be configured to digitized compensation signal.
In example 10, the receiver as any previous example is also optional comprises amplifier, is configured to provide Received signal strength.
In example 11, the compensator as any previous example is also optional comprises equalizer, is configured to coupling baseband signal and compensating signal; And adder, be configured to from baseband signal, deduct mated compensating signal.
In example 12, the receiver as any previous example is also optional comprises other frequency mixer, is configured to be mixed down other baseband signal by under other Received signal strength in carrier aggregation operator scheme.
In example 13, the receiver as example 12 is also optional comprises other local oscillator, and be configured to provide other local oscillator signals, it corresponds to the other receive frequency of other Received signal strength.
In example 14, the receiver as any previous example is also optional comprises envelope detector, is configured to the envelope detecting compensating signal; And envelope adjuster, be configured to the contribution reducing leakage signal component envelope in baseband signal.
Example 15 be one for the transceiver in radio-frequency (RF) communication system, comprise the receiver of any previous example 1-14; And reflector, be configured to provide modulated and transmit.
In example 16, the transceiver as example 15 is also optional comprises duplexer, is configured to provide modulated to the antenna port of transceiver and transmits, and receive described Received signal strength from antenna port.
In example 17, the transceiver configuration as example 15 or example 16 becomes to be mixed down baseband signal by under two Received signal strength in carrier aggregation operator scheme.
Example 18 is one and comprises any one mobile communication equipment as the transceiver of example 15 or example 16.
In example 19, the mobile communication equipment as example 18 is configured to receive via while a receive frequency and other receive frequency support to received signal.
Example 20 is a kind of methods for receiving a Received signal strength, comprises the leakage signal component being separated Received signal strength; Local oscillator signals is used to be mixed down baseband signal by under Received signal strength; The compensating signal of the position residing in leakage signal component in baseband signal will be mixed down under leakage signal component; Using compensation signal reduces the contribution of leakage signal component in baseband signal.
In example 21, method as example 20 is also optional comprises the mixed frequency signal frequency detected for lower mixing leakage signal component, this frequency is that the twice of duplex distance deducts pseudo-distance, duplex distance is the difference between tranmitting frequency and local oscillator frequency signal, and pseudo-distance is the difference do not needed between component frequencies and local oscillator frequency signal.
Example 22 is the devices for Received signal strength, comprising: the device being separated the leakage signal component of Received signal strength; Use local oscillator signals will to be mixed down the device of baseband signal under radiofrequency signal; Mixing under leakage signal component is resided in the device of the compensating signal of the position of leakage signal component in baseband signal; Using compensation signal reduces the device of the contribution of leakage signal component in baseband signal.
In example 23, the device for Received signal strength as example 22 is also optional comprises the device detected for the mixed frequency signal frequency of lower mixing leakage signal component, this frequency is that the twice of duplex distance deducts a pseudo-distance, duplex distance is the difference between tranmitting frequency and local oscillator frequency signal, and pseudo-distance is the difference do not needed between component frequencies and local oscillator frequency signal.
Specification and accompanying drawing are only for illustration of principle of the present disclosure.Therefore, be understandable that, those skilled in the art can design and can embody principle of the present disclosure and the various equipment be included in its spirit and scope, although this equipment does not describe clearly or illustrates.In addition, all embodiments described here are clearly mainly only for teaching purpose, with the concept helping reader understanding's principle of the present disclosure and contributed to prior art by inventor, and should be understood to be not limited to these specifically described embodiment and conditions.And, this describe principle, in all statements, example of the present disclosure and specific embodiment thereof, be intended to comprise it and be equal to.
Be expressed as " for ... device " functional module should be understood to include the independent function mould performing the circuit of specific function.Therefore, one " device for something or other " also can be understood to " form the device of something or other or be suitable for the device of something or other ".Therefore, be configured to the device of execution specific function and do not mean that this device is necessarily performing described function.
The function of various elements as shown in the figure can be provided by using specialized hardware, wherein said various element comprises any functional module being labeled as " device ", " for providing the device of sensor signal ", " device for generation of sending signal " etc., described specialized hardware can be " signal supplier ", " signal processing unit ", " processor ", " controller " etc., and can the hardware of executive software be associated with suitable software.In addition, any entity being described as " device " herein can correspond to or be embodied as " one or more module ", " one or more equipment ", " one or more unit " etc.When a function is provided by a processor, these functions can be provided by single application specific processor, single share processor or multiple independent processor, and some wherein in multiple independent processor can be shared.In addition, clearly the using of term " processor " or " controller " should not be construed as that be only limitted to can the hardware of executive software, but can impliedly include but not limited to, digital signal processor hardware, network processing unit, application-specific integrated circuit (ASIC), field programmable gate array, read-only memory, random access memory and nonvolatile memory for storing software.Also other hardware that is conventional and/or customization can be comprised.
Those skilled in the art should understand that each block diagram represents the concept map of the illustrative circuit that can embody disclosure principle herein.Similarly, be appreciated that the process that any flow table, flow chart, state transition graph, false code etc. represent different, it substantively on a computer-readable medium can represent and be performed by computer or processor, and no matter whether such computer or processor are explicitly shown.
In addition, following claim is attached in this detailed description, and wherein each claim can independently exist as an independent embodiment.When each claim independently exists as independent embodiment, although should notice that dependent claims can refer to the particular combination with other claims one or more in claims, other exemplary embodiments can also comprise the combination of dependent claims and other subordinates each or independent claims theme.Being combined in like this proposes herein, and this particular combination is not what expect unless otherwise indicated.In addition, the feature of a claim based on other independent claims any can also be comprised, even if this claim is not directly depend on described independent claims to realize.
It should also be noted that method can be realized by an equipment disclosed in specification or claim, this equipment has the device performing each behavior in said method.
In addition, be appreciated that multiple behavior or function should not be considered to be specific order disclosed in this specification or claim.Therefore, described disclosed multiple behavior or function can not be limited with a specific order, unless this behavior or function can not be exchanged due to technical reason.In addition, in some embodiments, a single behavior can comprise or can be divided into multiple sub-line and is.Described sub-line is in the disclosure that can be included in this single behavior and is the part of this single behavior disclosure, unless specifically excluded outside.
Claims (23)
1. the receiver (100 of a Received signal strength; 200; 260; 300; 520), comprising:
Separator (104; 240) the leakage signal component (112) be separated in described Received signal strength (102), is configured to;
Frequency mixer (106; 206), be configured to use local oscillator signals (116) to be mixed down baseband signal (114) by under Received signal strength (102);
Auxiliary mixting circuit (108), is configured to be mixed down the compensating signal (118) residing in leakage signal component positions place in baseband signal under described leakage signal component (112); And
Compensator (110; 250), be configured to use described compensating signal (118) to reduce the contribution of leakage signal component (112) in baseband signal (114).
2. receiver (100 as claimed in claim 1; 200; 260; 300; 520), wherein said auxiliary mixting circuit (108) uses the information in unwanted component (218) frequency of information in leakage signal component (112) frequency and local oscillator signals (116).
3. receiver (100 as claimed in claim 1 or 2; 200; 260; 300; 520), wherein said leakage signal component (112) transmitting corresponding to tranmitting frequency place in radio-frequency (RF) communication system.
4. receiver (100 as claimed in claim 2; 200; 260; 300; 520), wherein said local oscillator signals (116) is corresponding to described receiver (100; 200; 260; 300; 520) receive frequency; The frequency of described unwanted component (218) corresponds to receiver (100; 200; 260; 300; 520) another receive frequency.
5. receiver (100 as claimed in claim 1; 200; 260; 300; 520), wherein said separator (104; 240) frequency mixer (106 is arranged on; 206) and compensator (110; 250; 320) between.
6. receiver (100 as claimed in claim 5; 200; 260; 300; 520), wherein said auxiliary mixting circuit (108) is configured to use leakage signal component (112) described in mixing under mixed frequency signal, the twice that wherein said mixed frequency signal has a duplex distance deducts the frequency of pseudo-distance, described duplex distance is the difference between emission signal frequency and local oscillator signals (116) frequency, and described pseudo-distance is the difference between unwanted component (218) frequency and local oscillator signals (116) frequency.
7. the receiver (100 as described in claim 5 or 6; 200; 260; 300; 520), wherein said separator (104; 240) high pass filter is comprised.
8. receiver (100 as claimed in claim 3; 200; 260; 300; 520), wherein said auxiliary mixting circuit (108) comprises auxiliary mixer (122) and frequency shifter (126),
Described auxiliary mixer (122) is configured to use tranmitting frequency to be mixed down M signal (124) by under Received signal strength (102);
Described frequency shifter (126) is configured to afford redress signal (118) by M signal (124) being transferred to the position of leakage signal component in baseband signal (114).
9. receiver (100 as claimed in claim 1; 200; 260; 300; 520), also comprise main analog-to-digital conversion device (242), be configured to baseband signal described in digitlization (114); And submodule transducer (244), be configured to compensating signal described in digitlization (118).
10. receiver (100 as claimed in claim 1; 200; 260; 300; 520), also comprise amplifier, be configured to provide described Received signal strength (102).
11. receivers (100 as claimed in claim 1; 200; 260; 300; 520), wherein said compensator (250) comprising:
Equalizer (250a), is configured to coupling baseband signal (114) and compensating signal (118); And
Adder (250b), is configured to from baseband signal (114), deduct mated compensating signal (118).
12. receivers (100 as claimed in claim 1; 200; 260; 300; 520), also comprise other frequency mixer, be configured to be mixed down other baseband signal by under other Received signal strength in carrier aggregation operator scheme.
13. receivers (100 as claimed in claim 12; 200; 260; 300; 520), also comprise other local oscillator, be configured to provide the local oscillator signals that the other, its frequency corresponds to the other receive frequency of other Received signal strength.
14. receivers (100 as claimed in claim 1; 200; 260; 300; 520), also comprise:
Envelope detector (310), is configured to the envelope detecting described compensating signal (118); And
Envelope adjuster (320), is configured to the contribution reducing leakage signal component (112) envelope in baseband signal (114).
15., for the transceiver (510) in radio-frequency (RF) communication system, comprising:
Receiver (100 as claimed in claim 1; 200; 260; 300; 520); And
Reflector (510), is configured to provide modulated and transmits.
16. transceivers (510) as claimed in claim 15, also comprise duplexer, be configured to provide modulated to the antenna port of transceiver (510) transmit, and receive described Received signal strength (102) from antenna port.
17. transceivers as described in claim 15 or 16, are configured to be mixed down baseband signal by under two Received signal strength in carrier aggregation operator scheme.
18. mobile communication equipments (500), comprise transceiver as claimed in claim 15 (510).
19. mobile communication equipments as claimed in claim 18, are configured to receive via while a receive frequency and other receive frequency support to received signal (102).
20. 1 kinds, for receiving the method for Received signal strength (102), comprising:
Be separated the leakage signal component (112) of described Received signal strength (102);
Local oscillator signals (116) is used to be mixed down baseband signal (114) by under described Received signal strength (102);
The compensating signal (118) of the position residing in leakage signal component in baseband signal will be mixed down under described leakage signal component (112);
Described compensating signal (118) is used to reduce the contribution of leakage signal component (112) in baseband signal (114).
21. methods as claimed in claim 20, also comprise:
Determine the mixed frequency signal frequency of lower mixing leakage signal component (112), described frequency is that twice duplex distance deducts pseudo-distance, described duplex distance is the difference between tranmitting frequency and local oscillator signals (116) frequency, and described pseudo-distance does not need the difference between component (218) frequency and local oscillator signals (116) frequency.
22., for the device of Received signal strength, comprising:
Be separated the device of the leakage signal component (112) of described Received signal strength (102);
Use local oscillator signals (116) device of baseband signal (114) will to be mixed down under radiofrequency signal;
The device of the compensating signal (118) of the position residing in leakage signal component in baseband signal will be mixed down under described leakage signal component (112);
Described compensating signal (118) is used to reduce the device of the contribution of leakage signal component (112) in baseband signal (114).
The device of 23. Received signal strength as claimed in claim 22, also comprises:
Determine the device of the mixed frequency signal frequency of leakage signal component (112) described in lower mixing, described frequency is that the twice of duplex distance deducts pseudo-distance, described duplex distance is the difference between tranmitting frequency and local oscillator signals (116) frequency, and institute's pseudo-distance does not need the difference between component (218) frequency and local oscillator signals (116) frequency.
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| Application Number | Priority Date | Filing Date | Title |
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| DE102014109102.7 | 2014-06-30 | ||
| DE102014109102.7A DE102014109102B4 (en) | 2014-06-30 | 2014-06-30 | Receiver, transceiver and method for receiving a signal |
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| CN105391460B CN105391460B (en) | 2018-11-16 |
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Also Published As
| Publication number | Publication date |
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| DE102014109102A1 (en) | 2015-12-31 |
| CN105391460B (en) | 2018-11-16 |
| DE102014109102B4 (en) | 2021-09-16 |
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