CN1984414A - Multimode communication device and method of receiving multiple radio frequency signal therein - Google Patents
Multimode communication device and method of receiving multiple radio frequency signal therein Download PDFInfo
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- CN1984414A CN1984414A CNA2006101604428A CN200610160442A CN1984414A CN 1984414 A CN1984414 A CN 1984414A CN A2006101604428 A CNA2006101604428 A CN A2006101604428A CN 200610160442 A CN200610160442 A CN 200610160442A CN 1984414 A CN1984414 A CN 1984414A
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Abstract
The invention relates to a system and method providing variable-frequency IF conversion in a multimode communication device. Various aspects of the present invention provide a multimode communication device comprising at least one RF signal receiver adapted to receive at least a first RF signal corresponding to a first communication protocol and a second RF signal corresponding to a second communication protocol. A controllable frequency source may, for example, be adapted to output a mixing signal characterized by one of a plurality of selectable frequencies. Such selectable frequencies may, for example, comprise a first frequency corresponding to the first communication protocol and a second frequency corresponding to the second communication protocol. A mixer may, for example, receive a received RF signal from the RF signal receiver, receive a mixing signal from the controllable frequency source, and convert the received RF signal to an IF signal utilizing the received mixing signal.
Description
Technical field
The present invention relates to mobile communication, more particularly, relate to a kind of multimode communication device and in multimode communication device, receive method corresponding to a plurality of radiofrequency signals of a plurality of communication protocols.
Background technology
Mobile communication equipment is constantly popularized, and is more and more welcome.These mobile communication equipments include but not limited to cell phone, paging equipment, portable email equipment and personal digital assistant.Mobile communication equipment provides in varying environment the ability that also can communicate when moving for the user.
Mobile communication equipment can be operated according to plurality of communication schemes.For example, mobile communication equipment can move under cellular communication pattern and radio computer network communication pattern.These multi-mode mobile communication equipment can adopt corresponding radio configuration at each communication pattern.Various communication patterns can be corresponding to different separately radio devices.
Along with the increase of the radio device quantity in the multimode communication device, telecommunication circuit (as, frequency mixer, frequency synthesizer, filter etc.) will become bigger, more complicated and/or cost higher.The present invention will obtain explanation at the application's remainder with reference to the accompanying drawings, by with comparison of the present invention, those skilled in the art can further understand the restriction and the shortcoming of existing and traditional solution.
Summary of the invention
The invention provides a kind of method and system that the conversion of frequency conversion intermediate frequency is provided in multimode communication device, will be fully described and/or describe in conjunction with following at least one secondary accompanying drawing hereinafter, and carry out more complete illustrating in the claims.
According to an aspect of the present invention, provide a kind of multimode communication device, described multimode communication device comprises:
At least one radio frequency (being designated hereinafter simply as RF) signal receiver is used to receive corresponding to a RF signal of first communication protocol with corresponding to the 2nd RF signal of second communication agreement;
Frequency source, be used to receive at least one frequency control signal, and described at least one frequency control signal responded, export mixed signal on the frequency in a plurality of optional frequencies, wherein said a plurality of optional frequencies comprise corresponding to first hybrid frequency of described first communication protocol with corresponding to second hybrid frequency of described second communication agreement;
Frequency mixer communicates to connect with described at least one RF signal receiver and described frequency source;
With at least one module that described frequency source communicates to connect, be used for controlling described frequency source and on the frequency that described a plurality of optional frequencies are chosen, export described mixed signal.
Preferably, described frequency source comprises decimal N frequency synthesizer.
Preferably, described frequency source is programmable.
Preferably, described first communication protocol is GSM, and described second communication agreement is EDGE.
Preferably, described first hybrid frequency is the intermediate frequency less than 150KHz, and described second hybrid frequency is the intermediate frequency greater than 150KHz.
Preferably, described first communication protocol is WCDMA.
Preferably, described first hybrid frequency is the RF frequency, is used to control the conversion of a described RF signal to base band frequency by described frequency mixer.
Preferably, described multimode communication device further comprises the filter that communicates to connect with described frequency mixer, is used for according to one group of filter characteristic choosing from many groups of selectable filter characteristics signal being carried out filtering.
Preferably, the selectable filter characteristic of described many groups comprises:
Corresponding to first group of filter characteristic of described first communication protocol, comprising first bandwidth;
Corresponding to second group of filter characteristic of described second communication agreement, comprising second bandwidth.
Preferably, the selectable filter characteristic of described many groups comprises:
Corresponding to first group of filter characteristic of described first communication protocol, comprising first centre frequency;
Corresponding to second group of filter characteristic of described second communication agreement, comprising second centre frequency.
Preferably, described filter is programmable.
Preferably, described at least one module and described filter communicate to connect, and are used for controlling described filter and with one group of filter characteristic choosing from described many group filter characteristics the signal that receives are carried out filtering.
Preferably, described multimode communication device further comprises the AGC module that communicates to connect with described frequency mixer and filter, is used to amplify the signal of the corresponding a plurality of communication protocols that received, comprising described first communication protocol and described second communication agreement.
Preferably:
Described at least one RF signal receiver receives a described RF signal and the 2nd RF signal in the time division multiplexing mode;
The described frequency source of described at least one module controls is exported mixed signal on first hybrid frequency during corresponding to the time window of first communication protocol, and export mixed signal during corresponding to the time window of second communication agreement on second hybrid frequency.
Preferably, described at least one the RF signal receiver of the further control of described at least one module receives the specific RF signal in a plurality of RF signals, and wherein said a plurality of RF signals comprise a described RF signal and the 2nd RF signal.
According to an aspect of the present invention, provide a kind of method that receives corresponding to a plurality of RF signals of a plurality of communication protocols in multimode communication device, described method comprises:
Reception is corresponding to a RF signal of first communication protocol;
The control frequency source generates first mixed signal that has corresponding to the first frequency of described first communication protocol;
In frequency mixer, a described RF signal and first mixed signal are mixed;
Reception is corresponding to the 2nd RF signal of second communication agreement;
The control frequency source generates second mixed signal that has corresponding to the second frequency of described second communication agreement;
In frequency mixer, described the 2nd RF signal and second mixed signal are mixed.
Preferably, described method further comprises by decimal N frequency synthesizer and generates described first and second mixed signals.
Preferably:
First mixed signal that the generation of described control frequency source has corresponding to the first frequency of first communication protocol comprises described frequency source programming to generate described first mixed signal;
Second mixed signal that the generation of described control frequency source has corresponding to the second frequency of second communication agreement comprises described frequency source programming to generate described second mixed signal.
Preferably, described first communication protocol is GSM, and described second communication agreement is EDGE.
Preferably, described first hybrid frequency is the intermediate frequency less than 150KHz, and described second hybrid frequency is the intermediate frequency greater than 150KHz.
Preferably, described first communication protocol is WCDMA.
Preferably, described first hybrid frequency is the RF frequency, is used to control the conversion of RF signal to base band frequency by described frequency mixer.
Preferably, described method further comprises according to one group of filter characteristic choosing from many groups of selectable filter characteristics the signal that has mixed is carried out filtering.
Preferably, the selectable filter characteristic of described many groups comprises:
Corresponding to first group of filter characteristic of described first communication protocol, comprising first bandwidth;
Corresponding to second group of filter characteristic of described second communication agreement, comprising second bandwidth.
Preferably, the selectable filter characteristic of described many groups comprises:
Corresponding to first group of filter characteristic of described first communication protocol, comprising first centre frequency;
Corresponding to second group of filter characteristic of described second communication agreement, comprising second centre frequency.
Preferably, one group of filter characteristic that described basis is chosen from many groups of selectable filter characteristics is carried out filtering to the signal that has mixed and is comprised: programmable filter is programmed, make it carry out filtering according to one group of filter characteristic choosing to described mixed signal from many groups of selectable filter characteristics.
Preferably, described method further is included in before the filtering of described mixed signal, and described mixed signal is carried out automatic gain control.
Preferably:
Described reception the one RF signal and receive the 2nd RF signal with the time-division the more the multiplexing mode in road carry out;
First mixed signal that the generation of described control frequency source has corresponding to the first frequency of first communication protocol comprises that the described frequency source of control generates described first mixed signal during corresponding to the time window of first communication protocol;
Second mixed signal that the generation of described control frequency source has corresponding to the second frequency of second communication agreement comprises that the described frequency source of control generates described second mixed signal during corresponding to the time window of second communication agreement.
Preferably, described method comprises that further control RF signal receiver receives a signal of selecting from a described at least RF signal and the 2nd RF signal.
According to an aspect of the present invention, provide a kind of multimode communication device, having comprised:
Be used for the RF conversion of signals is the frequency mixer of IF signal;
Be used for providing to described frequency mixer the frequency source of mixed signal, wherein when described RF signal during corresponding to first communication protocol, the frequency of described mixed signal is first hybrid frequency; When described RF signal during corresponding to the second communication agreement, the frequency of described mixed signal is second hybrid frequency.
Each advantage of the present invention, feature and innovative point, and embodiment can be proved absolutely by hereinafter reaching accompanying drawing.
Description of drawings
Fig. 1 is the block diagram according to a part in the typical multi-mode communication system of the embodiment of the invention;
Fig. 2 is the block diagram according to a part in the typical multi-mode communication system of the embodiment of the invention;
Fig. 3 is the flow chart according to the multi-mode communication system of the embodiment of the invention;
Fig. 4 is the flow chart according to the multi-mode communication system of the embodiment of the invention.
Embodiment
Fig. 1 is the block diagram according to a part in the typical multi-mode communication system 100 of the embodiment of the invention.Multi-mode communication system 100 can comprise in the various communication systems any characteristic.Such as but not limited to, this multi-mode communication system can comprise various mobile communication equipments (as, cell phone, paging equipment, portable email equipment, personal digital assistant etc.) in any characteristic.In addition, multi-mode communication system 100 can comprise fixed communications or equipment (as, Network Access Point, base station, satellite, wireless router, set-top box etc.) characteristic.Further, multi-mode communication system 100 can comprise the various electronic equipments that have a radio communication function (as, TV, music player, camera, remote controllers etc.) characteristic.Therefore, the scope of each side of the present invention should not be limited to the characteristic of particular communications system or equipment.
Following discussion will be referred to various communication patterns.In the following discussion, communication pattern generally is considered to corresponding with the communication that utilizes special communication protocol or standard.The non-limiting tabulation of representative communication agreement comprise various cellular communication protocols (as, GSM, GPRS, EDGE, CDMA, WCDMA, TDMA, PDC etc.), comprise WLAN, WMAN, WPAN and WWAN (as, IEEE802.11, bluetooth, IEEE802.15, UWB, IEEE802.16, IEEE802.20, arbitrary WiFi agreement etc.) in interior various wireless network protocols or standard, various TV and communication standards etc.Therefore, the scope of each side of the present invention should not be limited to the characteristic of certain criteria or proprietary communication protocol.
Exemplary communications systems 100 includes RF antenna 105.As shown in Figure 1, in various Typical Disposition, system 100 comprise a plurality of RF antennas (as, adopt the configuration of specific antenna etc. with MIMO configuration, MISO configuration, beam shaping configuration, particular communication mode).Although what introduce in the following discussion is to handle by an antenna reception RF signal and by a signal processing path, each side of the present invention is interpreted as, and can expand to the system configuration of utilizing a plurality of antennas and/or signal processing path at an easy rate.
Canonical system 100 comprises at least one RF signal receiver, is used to receive the RF signal corresponding to a plurality of communication protocols.In non-limiting typical situation, RF signal receiver 110 can be used for receiving corresponding to a RF signal of first communication protocol with corresponding to the 2nd RF signal of second communication agreement.
RF signal receiver 110 comprises in the various RF receiving circuits any characteristic.This circuit comprises filter circuit, low noise amplifier (" LNA ") circuit, noise suicide circuit etc.
Canonical system 100 includes frequency mixer 120.Frequency mixer 120 can by the RF signal that will receive and have specific in the middle of the mixed signal of hybrid frequency mix, thereby be the IF signal with the RF conversion of signals that receives.Frequency mixer 120 also can be used for mixing by RF signal that will receive and mixed signal with the frequency that receives the RF signal, thereby is baseband frequency signal with the RF conversion of signals that receives.
In non-limiting typical situation, frequency mixer 120 can receive a RF signal (as, from RF receiver 110) and have first mixed signal of first intermediate frequency, mix a RF signal and first mixed signal, and output has an IF signal of first intermediate frequency.Then, frequency mixer 120 also receive the 2nd RF signal (as, from RF receiver 110) and have second mixed signal of second intermediate frequency, mix the 2nd RF signal and second mixed signal, and output has the 2nd IF signal of second intermediate frequency.For example, it is right to receive the first and second RF/ mixed signals continuously.Ensuing non-limiting typical situation is, frequency mixer 120 also can receive the 3rd RF signal (as, from RF receiver 110) and have the 3rd hybrid frequency (as, the frequency of the 3rd RF signal) the 3rd mixed signal, mix the 3rd RF signal and the 3rd mixed signal, and export the 3rd signal with base band frequency.
System 100 also includes frequency source 160, be used to export mixed signal (as, export frequency mixer 120 to).Exportable as, frequency source 160 with mixed signal that frequency is characteristics in a plurality of optional frequencies (as, the zero frequency under IF frequency, RF frequency and the various situation).For example, but frequency source 160 receive frequency control signals are determined the frequency of mixed signal at least in part based on this frequency control signal that receives, and export the mixed signal with definite frequency.
Frequency source 160 can comprise any the characteristics in the various frequency generation/combiner circuits.For example, frequency source 160 can comprise the characteristics of local oscillator.Similarly, frequency source 160 can comprise the characteristics of decimal N frequency synthesizer.Frequency source 160 can comprise various any characteristics that are used at the circuit of controlled, able to programme or optional frequency place output signal.
Under non-limiting typical situation, as response to the first frequency control signal, frequency source 160 can generate (or output) have corresponding to first communication protocol first in the middle of the mixed signal of hybrid frequency.Then, response second frequency control signal, frequency source 160 can generate the mixed signal that has corresponding to the second middle hybrid frequency of second communication agreement.Further, respond the 3rd frequency control signal, frequency source 160 can generate the mixed signal that has corresponding to the RF frequency of third communication agreement (as, the direct conversion from RF to the base band).
Under another non-limiting typical situation, response first frequency control signal, frequency source 160 generations (or output) have the mixed signal corresponding to the first middle hybrid frequency of gsm communication agreement.For example, this intermediate frequency is about 100KHz or smaller or equal to 150KHz.Subsequently, response second frequency control signal, frequency source 160 generations (or output) have the mixed signal corresponding to the second middle hybrid frequency of EDGE communication protocol.For example, this intermediate frequency is about 300KHz, about 200KHz or more than or equal to 150KHz.Then, respond the 3rd frequency control signal, frequency source 160 generates (or output) and has the mixed signal corresponding to the RF frequency of WCDMA agreement.Frequency mixer (as, frequency mixer 120 or other frequency mixer) can utilize this mixed signal to realize the direct conversion of WCDMA signal from RF to the base band.
Canonical system 100 also can include various amplifiers and/or gain control circuit.For example, canonical system 100 as shown in the figure includes AGC module 130, is used to control the amplitude of the signal of being handled by AGC module 130.AGC module 130 can be used for keeping the amplitude corresponding to the signal of various communication protocols.The frequency of this signal can be intermediate frequency or base band frequency.
As shown in Figure 1, canonical system 100 also can include any in the various additional signal treatment circuits.For illustrated simple and clear, be not included in the various circuit that often use in the various communication plans among Fig. 1.
Canonical system 100 can further include filter 140 (as, communicate to connect with frequency mixer 120).Filter can be used for according to the selectable filter characteristic trap signal of many groups.Name is called the multimode communication device (MULTIMODE COMMUNICATION DEVICE WITHSHARED SIGNAL PATH PROGRAMMABLE FILTER) of signalling channel programmable filter " have share ", act on behalf of case number is the U.S. Patent application 11/298 of 16887US02, introduced the non-limiting feature of typical controllable filter in 371, this complete quoting to carry out reference.
One group of filter characteristic can be corresponding to particular communication mode (or agreement).Corresponding to first communication protocol, and comprise first filter bandwidht and/or the first filter center frequency such as but not limited to, first group of filter characteristic.Second group of filter characteristic be corresponding to the second communication agreement, and comprise second filter bandwidht and/or the second filter center frequency.N organizes filter characteristic corresponding to N communication protocol, and comprises N filter bandwidht and/or N filter center frequency.
Under non-limiting typical situation, first group of filter characteristic can and comprise the filter bandwidht of relative narrower corresponding to gsm protocol; Second group of filter characteristic is corresponding to the WCDMA agreement and comprise the filter bandwidht of relative broad.
Although exemplary filter shown in Figure 1 140 is analog filters, the present invention can expand to digital filter or analog/digital hybrid filter at an easy rate.In addition, although have only a filter that has the optional filter characteristic among Fig. 1, can use filter such more than in the reality.As non-limiting example, first filter 140 as mentioned above, and second filter (as, digital filter) can communicate to connect with the output of A/D converter 150.
Canonical system 100 also can include control module 170, is used for the mixed signal that control frequency source 160 generates the characteristic frequency place.For example, control module 170 can be sent to frequency control signal frequency source 160.This control signal can be continuous signal, discrete signal, the triggering signal that is used for continuous control frequency source 160, or allows frequency source 160 generate the programming signal of mixed signal at the characteristic frequency place.
Control module 170 also can be used for control filters (as, filter 140 and/or other filter), make it according to one group of specific filter characteristic trap signal.Control module 170 can be further used for controlling RF receiver (as, RF receiver 110), makes it receive specific RF signal.
Under non-limiting typical situation, control module 170 (or other and control module 170 communicate to connect module) can determine to receive the signal corresponding to first communication protocol.Then, in control module 170 may command RF receivers 111, frequency source 160 and the filter 140 or all operate according to first communication protocol.For example, control module 170 can transmit control signal to RF receiver 110, makes the RF signal of its reception corresponding to first communication protocol; Transmit control signal to frequency source 160, make its generation have mixed signal corresponding to the intermediate frequency of first communication protocol; Transmit control signal to filter 140, make it according to carrying out signal filtering corresponding to first group of filter characteristic of first communication protocol.
Next, control module 170 (or other module that is connected with control module 170) can determine to receive the signal corresponding to the second communication agreement.Then, in control module 170 may command RF receivers 111, frequency source 160 and the filter 140 or all operate according to the second communication agreement.For example, control module 170 can transmit control signal to RF receiver 110, makes the RF signal of its reception corresponding to the second communication agreement; Transmit control signal to frequency source 160, make its generation have mixed signal corresponding to the intermediate frequency of second communication agreement; Transmit control signal to filter 140, make it according to carrying out signal filtering corresponding to second group of filter characteristic of second communication agreement.
Under another non-limiting typical situation, exemplary communications systems 100 can receive the time division multiplexing information corresponding to a plurality of communication protocols.For example, the mode that RF signal receiver 110 can time division multiplexing receives a RF signal and the 2nd RF signal.In this case, during time window corresponding to first communication protocol, control module 170 may command RF signal receivers 110 receive a RF signal, control frequency source 160 is in the first hybrid frequency place output mixed signal corresponding to first communication protocol, and control filters 140 is according to first group of filter characteristic trap signal corresponding to first communication protocol.During time window corresponding to the second communication agreement, control module 170 may command RF signal receivers 110 receive the 2nd RF signal, control frequency source 160 is in the second hybrid frequency place output mixed signal corresponding to the second communication agreement, and control filters 140 is according to second group of filter characteristic trap signal corresponding to the second communication agreement.
Shown canonical system 100 is non-limiting examples of the part of each side of the present invention.Therefore, the scope of each side of the present invention should not be limited to the special characteristic of canonical system 100.
Fig. 2 is the block diagram according to a part in the typical multi-mode communication system 200 of the embodiment of the invention.Such as but not limited to, canonical system 200 with shown in Figure 1 and share arbitrarily or all features at the canonical system 100 of above discussing.
Exemplary communications systems 200 can include RF antenna 205.Canonical system 200 also can include at least one RF signal receiver 210, is used to receive the RF signal corresponding to a plurality of communication protocols.Such as but not limited to, RF antenna 205 and RF signal receiver 210 can be shared arbitrarily or all features with antenna 105 and RF signal receiver 110 in shown in Figure 1 and the system 100 that above discussing.RF signal receiver 210 can include RF filter 212 (as, band is logical, low pass and/or high pass) and low noise amplifier 214 and other circuit.
Under non-limiting typical situation, RF signal receiver 210 can be used for receiving corresponding to a RF signal of first communication protocol with corresponding to the 2nd RF signal of second communication agreement.
Canonical system 200 also can include frequency mixer 220 and frequency source 260, such as but not limited to, they can be shared arbitrarily or all features with frequency mixer 120 and frequency source 160 in shown in Figure 1 and the system 100 that above discussing.
Frequency source 260 can be used for output with a plurality of optional frequencies (as, IF and/or RF frequency) in a mixed signal that frequency is a feature.For example, frequency source 260 can be used for the receive frequency control signal, determine the frequency of mixed signal according to the frequency control signal that received to small part, and output has the mixed signal of fixed frequency.
Although the frequency source shown in the figure 260 comprises decimal N frequency synthesizer 262, this frequency source 260 can comprise in the various frequency generation/combiner circuits any characteristics (as, be used for circuit in controlled, able to programme or optional frequency place output signal).
Under non-limiting typical situation, response first frequency control signal, decimal N frequency synthesizer 262 can generate (or output) have corresponding to first communication protocol first in the middle of the mixed signal of hybrid frequency.Then, response second frequency control signal, decimal N frequency synthesizer 262 can generate the mixed signal that has corresponding to the second middle hybrid frequency of second communication agreement.Further, respond the 3rd frequency control signal, decimal N frequency synthesizer 262 can have corresponding to the mixed signal of the RF frequency of third communication agreement (as, the direct conversion from RF to the base band).
Under another non-limiting typical situation, response first frequency control signal, decimal N frequency synthesizer 262 can generate (or output) have corresponding to the gsm communication agreement first in the middle of the mixed signal of hybrid frequency.For example, this intermediate frequency is about 100KHz or smaller or equal to 150KHz.Subsequently, response second frequency control signal, decimal N frequency synthesizer 262 can generate (or output) have corresponding to EDGE communication protocol second in the middle of the mixed signal of hybrid frequency.For example, this intermediate frequency is about 300KHz, about 200KHz or more than or equal to 150KHz.Then, respond the 3rd frequency control signal, decimal N frequency synthesizer 262 can generate (or output) and have the mixed signal corresponding to the RF frequency of WCDMA agreement.Frequency mixer (as, frequency mixer 220 or other frequency mixer) can utilize this mixed signal to realize the direct conversion of WCDMA signal from RF to the base band.
Canonical system 200 also can include various amplifiers and/or gain circuitry (as, AGC module 230).For example, AGC module 230 is used to keep the amplitude corresponding to the signal of various communication protocols.The frequency of this signal can be intermediate frequency or base band frequency.
Canonical system 200 can further include filter 240 (as, communicate to connect with frequency mixer 120).Can share arbitrarily or all features with the filter 240 in shown in Figure 1 and the system 100 that above discussing such as but not limited to, this filter.Filter 240 can be used for coming trap signal according to the selectable filter characteristic of many groups.Such filter characteristic group comprises that bandwidth characteristic, centre frequency characteristic, fading characteristic, analog/digital filter characteristic, branch (tap) quantity, IIR (infinite impulse response) are to FIR (finite impulse response) configuration etc.As previously mentioned, one group of filter characteristic can be corresponding to particular communication mode (or agreement).Equally as previously mentioned, although the exemplary filter shown in Fig. 2 240 is analog filters, each side of the present invention can expand to digital filter or analog/digital hybrid filter at an easy rate.In addition, although have only a filter that has the optional filter characteristic among Fig. 2, can use filter such more than in the reality.As non-limiting example, aforesaidly can be first filter 240, and second filter (as, digital filter) can communicate to connect with the output of A/D converter 250.
Canonical system 200 also can include control module 270, be used for control frequency source 260 (as, decimal N frequency synthesizer 262) mixed signal at generation characteristic frequency place, control filters 240 is carried out filtering signals according to one group of specific filter characteristic, and/or control RF receiver 210 receives specific RF signal.Such as but not limited to, control module 270 can be shared arbitrarily or all features with control module 170 shown in Figure 1.
Shown canonical system 200 is non-limiting examples of the part of each side of the present invention.Therefore, the scope of each side of the present invention should not be limited to the special characteristic of canonical system 200.
Fig. 3 is the flow chart according to the method for operation 300 of the multi-mode communication system of the embodiment of the invention.Such as but not limited to, share various functional characters shown in typical method 300 and Fig. 1-2 and at the canonical system of above being discussed 100,200.
As previously mentioned, the multi-mode communication system of manner of execution 300 (or other is in method of this discussion) comprises in the various communication systems any feature.Such as but not limited to, this multi-mode communication system can comprise mobile communication equipment (as, cell phone, paging equipment, portable email equipment, personal digital assistant etc.) characteristic.In addition, this multi-mode communication system can comprise fixed communications or equipment (as, Network Access Point, base station, satellite, wireless router, set-top box etc.) characteristic.Further, this multi-mode communication system can comprise the various electronic equipments that have a radio communication function (as, TV, music player, camera, remote controllers etc.) characteristic.Therefore, the scope of each side of the present invention should not be limited to the characteristic of particular communications system or equipment.
Typical method 300 starts from step 305.Method 300 can begin to carry out because of various reasons.For example, in case receive (detecting) RF signal, can begin to carry out typical method 300.In addition, wake or respond user or system command up, also can begin typical method 300 in order to respond from park mode.Therefore, the scope of each side of the present invention should not be limited to the feature that is caused by specific startup reason or condition.
In step 310, typical method 300 comprises the RF signal of reception corresponding to first communication pattern (or agreement).As example and unrestricted, step 310 with shown in Fig. 1-2 and the RF receiver of above being discussed 110,210 share arbitrarily or all functions features.
Step 310 can comprise according in the multiple mode any and receives a RF signal.For example, step 310 can comprise and utilizes one or more RF antennas (as, MIMO configuration, MISO configuration, beam shaping configuration etc.) to receive a RF signal.In addition, step 310 can comprise utilizes filtering and/or amplifying circuit to receive a RF signal, and this filtering and/or amplifying circuit are used for receiving/handle the RF signal corresponding to any agreement of a plurality of communication protocols.
Step 310 comprises utilizes the RF signal receiver to receive a RF signal, and this RF signal receiver is used to receive the RF signal corresponding to a plurality of communication protocols.For example, this RF signal receiver can be used for receiving corresponding to a RF signal of first communication protocol with corresponding to the 2nd RF signal of second communication agreement.
In step 320, typical method 300 can comprise that it is first mixed signal of feature that the control frequency source generates with the first frequency corresponding to first communication protocol.As example and unrestricted, step 320 with shown in Fig. 1-2 and the frequency source of above being discussed 160,260 and control module 170,270 share any or various functional characters.
This frequency source can comprise various features.This frequency source can be used for output with a plurality of optional frequencies (as, IF and/or RF frequency) in a mixed signal that frequency is characteristics.This frequency source can be used for the receive frequency control signal, determine the frequency of mixed signal based on the frequency control signal that has received to small part, and output has the mixed signal of fixed frequency.In this Typical Disposition, step 320 can comprise the generation control signal, and this control signal offers frequency source and is used for the control frequency source and generates and to have the mixed signal of first frequency.
Under non-limiting typical situation, step 320 comprises the generated frequency control signal, and this signal is offered decimal N frequency synthesizer to generate first mixed signal.Perhaps, step 320 comprises that also control local oscillator and other frequency synthesizer generate first mixed signal.
According to the configuration of frequency source, can be in the step 320 by continuous control signal, discrete control signal, triggering control signal being provided or coming frequency source is controlled by transmission be used to the to programme data of this frequency source.
Under non-limiting typical situation, be the first frequency control signal that response generates in step 320, this frequency source can generate (or output) have corresponding to first communication protocol first in the middle of the mixed signal of hybrid frequency.
Under another non-limiting typical situation, be the first frequency control signal that response generates in step 320, this frequency source can generate (or output) have corresponding to the gsm communication agreement first in the middle of the mixed signal of hybrid frequency.For example, this intermediate frequency is about 100KHz or smaller or equal to 150KHz.Under another non-limiting typical situation, be the first frequency control signal that response generates in step 320, this frequency source can generate the mixed signal that has corresponding to the second middle hybrid frequency of EDGE communication protocol.For example, this intermediate frequency is about 300KHz, about 200KHz or more than or equal to 150KHz.Under a non-limiting typical situation again, be the first frequency control signal that response generates in step 320, this frequency source can generate the mixed signal that has corresponding to the RF frequency of WCDMA agreement.Frequency mixer (as, in step 330) can utilize this mixed signal to realize the direct conversion of WCDMA signal from RF to the base band.
In step 330, method 300 be included in the frequency mixer with a RF signal (as, in step 310, receive obtain) and first mixed signal (as, in step 320, obtain from frequency source) mix.As example and unrestricted, step 330 with shown in Fig. 1-2 and the frequency mixer of above being discussed 120,220 share various functional characters.
For example, step 330 comprise utilize the RF signal of frequency mixer (or similar devices) by will having received (as, in step 310, receive and obtain) and have specific in the middle of hybrid frequency mixed signal (as, in step 320, obtain) mix, thus a RF conversion of signals that will receive is the IF signal.In addition, step 330 also utilize frequency mixer by the RF signal that will receive and have the frequency characteristics that receive the RF signal mixed signal (as, in step 320, obtain) mix, thus a RF conversion of signals that will receive is a baseband frequency signal.
In step 340, typical method 300 comprises the two RF signal of reception corresponding to second communication pattern (or agreement).And unrestricted, step 340 is shared arbitrarily or all functions feature with the step of above being discussed 310 as example.
For example, step 340 can comprise according in the multiple mode any and receives the 2nd RF signal.For example, step 310 can comprise and utilizes one or more RF antennas (as, MIMO configuration, MISO configuration, beam shaping configuration etc.) to receive the 2nd RF signal.This or these antenna can be identical with the antenna of use in the step 310, also can be different.In addition, step 340 can utilize filtering and/or amplifying circuit to receive the 2nd RF signal, and this filtering and/or amplifying circuit are used for receiving/handle the RF signal corresponding to any agreement of a plurality of communication protocols.This circuit can with step 310 in use identical, also can be different.
Step 340 comprises utilizes the RF signal receiver to receive the 2nd RF signal, and this RF signal receiver is used to receive the RF signal corresponding to a plurality of communication protocols.For example, this RF signal receiver can be used for receiving corresponding to a RF signal of first communication protocol with corresponding to the 2nd RF signal of second communication agreement.This RF signal receiver can with step 310 in use identical, also can be different.
Under non-limiting typical situation, step 310 and 340 can be utilized at least a portion common circuit, and the use of this common circuit can be controlled by the control signal that is sent to this common circuit in the step 310 and 340.
In step 350, typical method 300 comprise the control frequency source (as, the same frequency source of control in step 320, or frequency source of the same type) generate second mixed signal, this mixed signal has the second frequency corresponding to the second communication agreement.And unrestricted, step 350 is shared arbitrarily or all functions feature with the step of above being discussed 320 as example.
This frequency source can be identical with the frequency source in the step 320, perhaps with step 320 in frequency source share all features.For example, this frequency source can be used for output with a plurality of optional frequencies (as, IF and/or RF frequency) in a mixed signal that frequency is characteristics.This frequency source can be used for the receive frequency control signal, determine the frequency of mixed signal based on the frequency control signal that has received to small part, and output has the mixed signal of fixed frequency.In this Typical Disposition, step 350 can comprise the generation control signal, offers frequency source, is used to control this frequency source generation and has the mixed signal of second frequency.
Under non-limiting typical situation, step 350 comprises the generated frequency control signal, and this signal is offered decimal N frequency synthesizer to generate second mixed signal.In addition, step 350 comprises that also control local oscillator and other frequency synthesizer generate second mixed signal.
According to the configuration of frequency source, in the step 350 by continuous control signal, discrete control signal, triggering control signal being provided or this frequency source being controlled by transmission be used to the to programme data of frequency source.
Under non-limiting typical situation, be the second frequency control signal that response generates in step 350, this frequency source can generate (or output) have corresponding to the second communication agreement second in the middle of the mixed signal of hybrid frequency.
Under another non-limiting typical situation, be the second frequency control signal that response generates in step 350, this frequency source can generate (or output) have corresponding to the gsm communication agreement second in the middle of the mixed signal of hybrid frequency.For example, this intermediate frequency is about 100KHz or smaller or equal to 150KHz.Under another non-limiting typical situation, be the second frequency control signal that response generates in step 350, this frequency source can generate the mixed signal that has corresponding to the second middle hybrid frequency of EDGE communication protocol.For example, this intermediate frequency is about 300KHz, about 200KHz or more than or equal to 150KHz.Under a non-limiting typical situation again, be the second frequency control signal that response generates in step 350, this frequency source can generate the mixed signal that has corresponding to the RF frequency of WCDMA agreement.Frequency mixer (as, in step 360) can utilize this mixed signal to realize the direct conversion of WCDMA signal from RF to the base band.
In step 360, typical method 300 be included in frequency mixer (as, the frequency mixer all with step 330 is identical) in the 2nd RF signal and second mixed signal are mixed.And unrestricted, step 360 is shared arbitrarily or all functions feature with the step of above being discussed 330 as example.
For example, step 360 comprise the 2nd RF signal that utilizes frequency mixer to pass through to have received (as, in step 340, receive and obtain) and have specific in the middle of hybrid frequency mixed signal (as, in step 350, obtain) mix, thereby the 2nd RF conversion of signals that will receive is the IF signal.Step 360 also comprise utilize frequency mixer by the 2nd RF signal that will receive and have the frequency that receives the RF signal mixed signal (as, in step 350, obtain) mix, thereby the 2nd RF conversion of signals that will receive is a baseband frequency signal.
In step 395, typical method 300 carries out various subsequent treatment.And unrestricted, step 395 can be utilized the various signals of automatic gain control and treatment as example.Step 395 also comprises to be changed signal between analog-and digital-.Further, step 395 comprises various signals is added filtering.
Under non-limiting typical situation, mode that can time division multiplexing receives and handles the first and second RF signals.In this case, in the RF signal process that receives corresponding to first communication protocol, but execution in step 310-330; And in the RF signal process that receives corresponding to the second communication agreement, but execution in step 340-360.In this case, step 395 can comprise the execution flow process according to the current RF signal type control method 300 that is receiving.
Fig. 4 is the flow chart according to the method for operation 400 of the multi-mode communication system of the embodiment of the invention.As example and unrestricted, typical method 400 can be with shown in Figure 3 and share arbitrarily or all features in the method for above being discussed 300.
At step 410-430, the RF signal that typical method 400 receives corresponding to first communication protocol (or pattern), the control frequency source generates first mixed signal that has corresponding to the first frequency of first communication protocol, and in frequency mixer (or similar module) a RF signal is mixed with first mixed signal.And unrestricted, step 410-430 can share arbitrarily or all features with step 310-330 shown in Figure 3 and in the method for above being discussed 300 as example.
In step 432, typical method 400 comprises that according to choosing in the selectable filter characteristic of many groups one group carries out filtering to mixed signal.For example, step 432 comprises that control filters (as, controllable filter) carries out filtering according to the filter characteristic of a group selection to this mixed signal.And unrestricted, step 432 can be with shown in Fig. 1-2 and in the control module of above being discussed 170,270 and filter 140,240 arbitrarily shared or all features as example.
The front has provided the various characteristic features of controllable filter and optional filter characteristic group.For example, step 432 can be carried out various filtering or FILTER TO CONTROL operation, this is called in name " having the multimode communication device of sharing the signalling channel programmable filter ", act on behalf of case number is the U.S. Patent application 11/298 of 16887US02, provided introduction in 371, this complete quoting to carry out reference.
Again for example, one group of filter characteristic can be corresponding to particular communication mode (or agreement).As example and unrestricted, first group of filter characteristic be corresponding to first communication protocol, and comprise first filter bandwidht and/or the first filter center frequency.Second group of filter characteristic be corresponding to the second communication agreement, and comprise second filter bandwidht and/or the second filter center frequency.N organizes filter characteristic corresponding to N communication protocol, and comprises N filter bandwidht and/or N filter center frequency.
Under a non-limiting typical situation, first group of filter characteristic can and comprise the filter bandwidht of relative narrower corresponding to gsm protocol; And second group of filter characteristic is corresponding to the WCDMA agreement and comprise the filter bandwidht of relative broad.
Note that step 432 comprises control and/or carries out simulation and/or digital filtering.Simultaneously, should also be noted that step 432 comprises control one or more filter functions that come carry out desired in a plurality of filters.This analog/digital filtering can be correspondingly and the Change-over knot between any desired simulation and the numeric field lump together.
Under a non-limiting typical situation, the communication system (or module of this system) of execution typical method 400 can determine to receive the signal corresponding to first communication protocol.Then step 410 comprises the RF signal of reception corresponding to first communication protocol.Step 420 comprises that the control frequency source generates first mixed signal that has corresponding to the frequency of first communication protocol.Step 430 comprises that a RF signal and first mixed signal that will receive mix, and generates first mixed signal.And step 432 comprises according to first group of filter characteristic corresponding to first communication protocol of selecting, control filters to first mixed signal (or signal indication wherein) carry out filtering.
In step 434, typical method 400 comprises signal of communication (as, the signal of filtering in the signal that receives in the step 420, the signal of the mixing among the step 420-430 and the step 432) is carried out various types of additional treatments.As example and unrestricted, this is further handled and comprises and carry out various amplifications (as, AGC control), analog/digital conversion, filtering, Digital Signal Processing and other operation.
At step 440-460, typical method 400 comprises the two RF signal of reception corresponding to the second communication pattern, the control frequency source generates second mixed signal that has corresponding to the second frequency of second communication agreement, and in frequency mixer (or similar module) the 2nd RF signal is mixed with second mixed signal.And unrestricted, step 410-430 can share arbitrarily or all features with step 340-360 shown in Figure 3 and in the method for above being discussed 300 as example.
In step 462, typical method 400 comprises that according to the selection in many group filter characteristics one group carries out filtering to the signal that has mixed.For example, step 462 comprises that control filters (as, controllable filter) carries out filtering according to one group of filter characteristic selecting to the signal that has mixed.And unrestricted, step 462 can be shared arbitrarily or all functions feature with the step of above being discussed 432 as example.The front has provided the various non-limiting characteristic feature of filter and filter characteristic group.
Under a non-limiting typical situation, receive in step 410-434 and handle after the signal of communication corresponding to first communication protocol, the communication system (or module of this system) of execution typical method 400 can determine to receive the signal corresponding to the second communication agreement.For example, step 440 then comprises the two RF signal of reception corresponding to the second communication agreement.Step 450 can comprise that the control frequency source generates second mixed signal that has corresponding to the frequency of second communication agreement.Step 460 comprises that the 2nd RF signal that will receive and second mixed signal mix, and generates second mixed signal.And step 462 comprises according to second group of filter characteristic corresponding to the second communication agreement of selecting, control filters to second mixed signal (or signal indication wherein) carry out filtering.
In step 464, typical method 400 comprises signal of communication (as, the signal of filtering in signal that mixes among the signal that receives in the step 440, the step 450-460 and the step 462) is carried out various types of additional treatments.As example and unrestricted, this is further handled and comprises and carry out various amplifications (as, AGC control), analog/digital conversion, filtering, Digital Signal Processing and other operation.
In step 495, typical method 400 is carried out various subsequent treatment, and this has provided various examples when the step 395 of Fig. 3 is discussed before.
Under a non-limiting typical situation, mode that can time division multiplexing receives and handles the first and second RF signals.In this case, in the RF signal process that receives corresponding to first communication protocol, but execution in step 410-434; And in the RF signal process that receives corresponding to the second communication agreement, but execution in step 440-464.In this case, step 495 can comprise the execution flow process according to the current RF signal type control method 400 that is receiving.
A typical method of being given 300 and 400 parts for each side of the present invention provide nonrestrictive explanation.Therefore, the scope of each side of the present invention should not be limited to the special characteristic of typical method 300 and 400.
For the clearness of example, canonical system 100-200 provides in the mode of various functional modules.Various module available hardware, software or way of hardware and software combination realize.Various modules can single integrated circuit or the combination of a plurality of integrated circuits realize.In addition, various modules also can have identical submodule and/or sub-element.And unrestricted, various hardware modules can be shared various electronic components as example, and various software module can be shared various software routines.Therefore, the scope of each side of the present invention should not be limited to the feature that any specific hardware and/or software are realized, should not be limited to any independent boundary between various functional modules yet.
Embodiments of the invention provide a kind of frequency conversion IF are provided in multimode communication device the system and method for conversion.Below invention has been described in conjunction with specific embodiments, but it will be understood by those skilled in the art that without departing from the present invention, also can carry out various variations and be equal to replacement the present invention.In addition, for adapting to the specific occasion or the material of the technology of the present invention, can carry out many modifications and not break away from its protection range the present invention.Therefore, the present invention is not limited to specific embodiment disclosed herein, and comprises that all drop into the embodiment of claim protection range.
Claims (10)
1, a kind of multimode communication device is characterized in that, described multimode communication device comprises:
At least one video receiver is used to receive corresponding to first radiofrequency signal of first communication protocol with corresponding to second radiofrequency signal of second communication agreement;
Frequency source, be used to receive at least one frequency control signal, and described at least one frequency control signal responded, export mixed signal on the frequency in a plurality of optional frequencies, wherein said a plurality of optional frequencies comprise corresponding to first hybrid frequency of described first communication protocol with corresponding to second hybrid frequency of described second communication agreement;
Frequency mixer communicates to connect with described at least one video receiver and described frequency source;
With at least one module that described frequency source communicates to connect, be used for controlling described frequency source and on the frequency that described a plurality of optional frequencies are chosen, export described mixed signal.
2, multimode communication device according to claim 1 is characterized in that, described frequency source comprises decimal N frequency synthesizer.
3, multimode communication device according to claim 1 is characterized in that, described frequency source is programmable.
4, multimode communication device according to claim 1 is characterized in that, described first communication protocol is GSM, and described second communication agreement is EDGE.
5, multimode communication device according to claim 4 is characterized in that, described first hybrid frequency is the intermediate frequency less than 150KHz, and described second hybrid frequency is the intermediate frequency greater than 150KHz.
6, a kind of method that receives in multimode communication device corresponding to a plurality of radiofrequency signals of a plurality of communication protocols is characterized in that described method comprises:
Reception is corresponding to first radiofrequency signal of first communication protocol;
The control frequency source generates first mixed signal that has corresponding to the first frequency of described first communication protocol;
In frequency mixer, described first radiofrequency signal and first mixed signal are mixed;
Reception is corresponding to second radiofrequency signal of second communication agreement;
The control frequency source generates second mixed signal that has corresponding to the second frequency of described second communication agreement;
In frequency mixer, described second radiofrequency signal and second mixed signal are mixed.
7, method according to claim 6 is characterized in that, described method further comprises by decimal N frequency synthesizer and generates described first and second mixed signals.
8, method according to claim 6 is characterized in that,
First mixed signal that the generation of described control frequency source has corresponding to the first frequency of first communication protocol comprises described frequency source programming to generate described first mixed signal;
Second mixed signal that the generation of described control frequency source has corresponding to the second frequency of second communication agreement comprises described frequency source programming to generate described second mixed signal.
9, method according to claim 6 is characterized in that, described first communication protocol is GSM, and described second communication agreement is EDGE.
10, a kind of multimode communication device is characterized in that, described multimode communication device comprises:
Be used for radiofrequency signal is converted to the frequency mixer of intermediate-freuqncy signal;
Be used for providing to described frequency mixer the frequency source of mixed signal, wherein when described radiofrequency signal during corresponding to first communication protocol, the frequency of described mixed signal is first hybrid frequency; When described radiofrequency signal during corresponding to the second communication agreement, the frequency of described mixed signal is second hybrid frequency.
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| Application Number | Priority Date | Filing Date | Title |
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| US73725805P | 2005-11-16 | 2005-11-16 | |
| US60/737,258 | 2005-11-16 | ||
| US11/376,531 | 2006-03-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101453223B (en) * | 2007-11-28 | 2013-09-04 | 瑞昱半导体股份有限公司 | Signal receiving method and related receiving apparatus |
| CN101778141B (en) * | 2009-01-12 | 2013-11-06 | 瑞昱半导体股份有限公司 | Frequency conversion network device and frequency conversion network wiring method |
| WO2016141506A1 (en) * | 2015-03-06 | 2016-09-15 | 华为技术有限公司 | Wireless signal processing system, method and apparatus, wireless conversion module, router, and user equipment |
| CN114584164A (en) * | 2022-01-25 | 2022-06-03 | 北京邮电大学 | Frequency band reconfigurable radio frequency receiver front end facing multi-standard communication |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101453223B (en) * | 2007-11-28 | 2013-09-04 | 瑞昱半导体股份有限公司 | Signal receiving method and related receiving apparatus |
| CN101778141B (en) * | 2009-01-12 | 2013-11-06 | 瑞昱半导体股份有限公司 | Frequency conversion network device and frequency conversion network wiring method |
| WO2016141506A1 (en) * | 2015-03-06 | 2016-09-15 | 华为技术有限公司 | Wireless signal processing system, method and apparatus, wireless conversion module, router, and user equipment |
| CN107005511A (en) * | 2015-03-06 | 2017-08-01 | 华为技术有限公司 | Handle system, method and device, wireless conversion module, router and the user equipment of wireless signal |
| US10333562B2 (en) | 2015-03-06 | 2019-06-25 | Huawei Technologies, Co., Ltd. | Radio signal processing system, method, and apparatus, radio transformation module, router, and user equipment |
| CN107005511B (en) * | 2015-03-06 | 2020-01-10 | 华为技术有限公司 | System, method and device for processing wireless signal, wireless transformation module, router and user equipment |
| CN114584164A (en) * | 2022-01-25 | 2022-06-03 | 北京邮电大学 | Frequency band reconfigurable radio frequency receiver front end facing multi-standard communication |
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Application publication date: 20070620 |