CN101938293B - Multimode-supporting radio frequency transceiver, terminal and switching method of terminal - Google Patents
Multimode-supporting radio frequency transceiver, terminal and switching method of terminal Download PDFInfo
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- CN101938293B CN101938293B CN 201010256181 CN201010256181A CN101938293B CN 101938293 B CN101938293 B CN 101938293B CN 201010256181 CN201010256181 CN 201010256181 CN 201010256181 A CN201010256181 A CN 201010256181A CN 101938293 B CN101938293 B CN 101938293B
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Abstract
The invention provides a multimode-supporting radio frequency transceiver, a terminal and a switching method of the terminal. The radio frequency transceiver comprises a receiving module, a transmitting module and a phase-lock loop module, wherein the receiving module is used for receiving a radio frequency signal, carrying out down-conversion on the received signal, carrying out analog-to-digital conversion on the converted signal and then inputting the signal into a baseband control module; the transmitting module is used for carrying out analog-to-digital conversion on the signal input by the baseband control module, carrying out up-conversion on the signal and then transmitting the signal; and the phase-lock loop module is used for providing a local oscillator signal to the receiving module and/or the transmitting module and comprises at least two phase-lock loops, wherein only one of the phase-lock loops works to provide the local oscillator signal at the same time. In the technical scheme, two phase-lock loops are adopted to switch in a relatively short switching time, so that the requirement of application of multimode, such as dual modes and the like, on the switching time can be met and all application occasions in multimode, such dual modes and the like, can be supported.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to a kind of changing method of supporting RF signal receiving and s ending device, terminal and the terminal of multimode.
Background technology
At moving communicating field, the development of 3G is just like a raging fire, three mainstream standard of 3G industry, TD-SCDMA, WCDMA and CDMA2000, competition in China is pulled open, and wherein the TD-SCDMA standard is the 3G standard that China Mobile adopts, and is the 3G technology of the autonomous property right of China.
The TD-SCDMA standard has been brought new opportunity in the mobile phone terminal industry that develops into China of China.Yet in the development of current TD-SCDMA commercialization, the development of the development of network terminal and mobile phone terminal industry is obviously uneven, and the development of terminal technology has become a bottleneck of restriction TD-SCDMA development.The TD-SCDMA terminal technology is compared than the terminal technology of WCDMA and CDMA2000, and the renewal speed of technology is slow.One of them very important reason is relatively slow for the radio-frequency devices of TD-SCDMA terminal development, especially the R﹠D cycle of radio-frequency (RF) transceiver (Transceiver) is longer, drop into also larger, so at the initial stage of TD-SCDMA industrial chain development, the transceiver chip that can be used for the TD-SCDMA terminal is less, becomes an important restriction factor that improves terminal capabilities.
Because the network coverage, the initial stage terminal of exploitation must be supported GSM and two kinds of patterns of TD-SCDMA simultaneously.In most of terminal solution of current support GSM and TD-SCDMA bimodulus, TD-SCDMA radio frequency chip and GSM radio frequency chip separate.This can cause cost relatively high, and the BOM of PCB is larger.
The present inventor finds in realizing process of the present invention: the terminal of the support GSM/TD-SCDMA bimodulus of prior art is in the scheme of the GSM pattern RF signal receiving and s ending device identical with the TD-SCDMA mode common, such as the existing single chip solution of supporting GSM and TD-SCDMA bimodulus, owing to only using a phase-locked loop (PLL), when terminal handover, phase-locked loop changes operating state, for again phase-locked in another frequency, need frequency of experience to switch and stable process, cause the overlong time switched, demand switching time of several scenes under the bimodulus can't be satisfied, the several scenes under the bimodulus can not be supported.
Summary of the invention
Embodiments of the invention provide a kind of RF signal receiving and s ending device of supporting multimode, terminal, and the changing method of terminal, with the terminal of the support multimode that solves prior art under heterogeneous networks pattern such as GSM pattern and TD-SCDMA pattern during the shared radio frequency R-T unit, requirement switching time of the multiple switch mode under the multimode can't be satisfied, thereby the technical problem of plurality of application scenes under the multimode can't be supported.
To achieve these goals, the invention provides a kind of RF signal receiving and s ending device of supporting multimode, comprising:
Receiver module is used for received RF signal, and the signal of described reception is carried out down-conversion, and after the signal after the down-conversion carried out analog-to-digital conversion, input base band control module;
Transmitter module is used for the signal of base band control module input is carried out digital-to-analogue conversion, carries out launching after the up-conversion again;
Phase-locked loop module is used to described receiver module and/or transmitter module that local oscillation signal is provided, and comprises at least two phase-locked loops, and the same time only has a phase-locked loop to be in the operating state that local oscillation signal is provided.
Preferably, described phase-locked loop module also comprises:
Switch module is connected with described receiver module, sending module and described two phase-locked loops at least, is used for according to the instruction of base band control module input providing the phase-locked loop of local oscillation signal to switch for described receiver module or sending module.
Also the provide support terminal of multimode of the present invention comprises: RF signal receiving and s ending module and base band control module,
Described RF signal receiving and s ending module comprises:
Receiver module is used for received RF signal, and the signal of described reception is carried out down-conversion, and after the signal after the down-conversion carried out analog-to-digital conversion, inputs described base band control module;
Transmitter module is used for the signal of described base band control module input is carried out digital-to-analogue conversion, carries out launching after the up-conversion again;
Phase-locked loop module is used to described receiver module and/or transmitter module that local oscillation signal is provided, and comprises at least two phase-locked loops, and the same time only has a phase-locked loop to be in the operating state that local oscillation signal is provided;
Described base band control module comprises:
The first determination module is used for determining the current residing mode of operation of terminal and operating state;
The second determination module is used for determining the working frequency points of adjacent cell and the mode of operation of adjacent cell according to the adjacent cell measurement result who obtains;
PLL control module, be used for when the switching that terminal wants to carry out belongs to the predetermined signal strength signal intensity that need carry out switch mode that phase-locked loop switches and described adjacent cell greater than predetermined the first threshold value, open in the current not in running order phase-locked loop, and the frequency point setting that the described phase-locked loop of opening is phase-locked is the working frequency points of described adjacent cell; And during greater than predetermined the second threshold value, carry out the switching of phase-locked loop in the signal strength signal intensity of described adjacent cell, and the phase-locked loop that local oscillation signal is provided is switched to the described phase-locked loop of opening, described the second threshold value is greater than described the first threshold value.
Described terminal is supported GSM and TD-SCDMA bimodulus, and the switch mode that described predetermined need carry out the phase-locked loop switching comprises following at least a:
The GSM emission state switches to the TD-SCDMA accepting state;
The GSM accepting state is to the TD-SCDMA emission state;
The GSM accepting state is to the TD-SCDMA accepting state;
The TD-SCDMA emission state is to the GSM accepting state;
The TD-SCDMA accepting state is to the GSM accepting state;
Adjacent time-slots TD-SCDMA emission state switches to the alien frequencies of TD-SCDMA accepting state;
Adjacent time-slots TD-SCDMA accepting state is switched to the alien frequencies of TD-SCDMA emission state.
Preferably, described phase-locked loop module also comprises switch module, and described PLL control module realizes the switching of described phase-locked loop by controlling described switch module.
Preferably, described PLL control module, be further used for switching to another GSM residential quarter when terminal switching to from a GSM residential quarter of wanting to carry out, or in the TD-SCDMA residential quarter or the same frequency that carries out of minizone when switching, the state of the phase-locked loop by changing work at present is realized the switching of described terminal.
The present invention also provides a kind of changing method of supporting the terminal of multimode, described terminal comprises: RF signal receiving and s ending module and base band control module, described RF signal receiving and s ending module comprises: receiver module, transmitter module and phase-locked loop module, described phase-locked loop module, be used to described receiver module and/or transmitter module that local oscillation signal is provided, described phase-locked loop module comprises: at least two phase-locked loops, the same time only has a phase-locked loop to be in the operating state that local oscillation signal is provided, and described method comprises the steps:
Steps A, base band control module are determined the current residing mode of operation of terminal and operating state;
Step B, the base band control module obtains the measurement result of adjacent cell, and determines the working frequency points of adjacent cell and the mode of operation of adjacent cell according to the measurement result of described adjacent cell;
Step C, when the pattern of the switching of terminal belongs to the predetermined signal strength signal intensity that need carry out switch mode that phase-locked loop switches and described adjacent cell greater than predetermined the first threshold value, the base band control module is opened in the current not in running order phase-locked loop, and with the frequency point setting of the described phase-locked loop of the opening working frequency points in described adjacent cell;
Step D, when the signal strength signal intensity of described adjacent cell during greater than predetermined the second threshold value, the base band control module is carried out the switching of phase-locked loop, the phase-locked loop that local oscillation signal is provided is switched to the phase-locked loop of opening among the described step C, and described the second threshold value is greater than described the first threshold value.
Preferably, before the described step C, also comprise:
Corresponding relation between pre-set switch mode and the switching mode, described switching mode comprises: the state that changes the phase-locked loop of current activation; With, carry out phase-locked loop and switch.
Preferably, described terminal is supported GSM and TD-SCDMA bimodulus, and the switch mode that described predetermined need carry out the phase-locked loop switching comprises following at least a:
The GSM emission state switches to the TD-SCDMA accepting state;
The GSM accepting state is to the TD-SCDMA emission state;
The GSM accepting state is to the TD-SCDMA accepting state;
The TD-SCDMA emission state is to the GSM accepting state;
The TD-SCDMA accepting state is to the GSM accepting state;
Adjacent time-slots TD-SCDMA emission state switches to the alien frequencies of TD-SCDMA accepting state;
Adjacent time-slots TD-SCDMA accepting state is switched to the alien frequencies of TD-SCDMA emission state.
Preferably, after the described step B, when terminal switching to from a GSM residential quarter of wanting to carry out switches to another GSM residential quarter, or in the TD-SCDMA residential quarter or the same frequency that carries out of minizone when switching, the state of the phase-locked loop by changing work at present is realized the switching of described terminal.
Preferably, among the described step D, realize the switching of described phase-locked loop by the control switch module.
A technical scheme in the technique scheme has following technique effect:
The RF signal receiving and s ending device of the support multimode of the embodiment of the invention, by at least two phase-locked loops are set, utilize this at least two phase-locked loops, when terminal generation handover, undertaken frequently standby by opening first in the current untapped phase-locked loop one, and when the signal of adjacent cell satisfies predetermined condition, the phase-locked loop of work at present is switched to above-mentioned standby phase-locked loop frequently, can finish switching shorter switching time like this, thereby can satisfy requirement switching time that multimode such as bimodulus are used, can support the handoff scenario that a phase-locked loop can't be supported of passing through of prior art, switch to accepting state under the TD-SCDMA residential quarter such as the accepting state under from the GSM residential quarter, or the alien frequencies switching of the adjacent time-slots in the TD-SCDMA residential quarter etc., thereby realization is to the support of all application scenarioss under multimode such as the bimodulus.
Description of drawings
Fig. 1 is the structural representation of terminal of the support multimode of the embodiment of the invention;
Fig. 2 is the switch mode schematic diagram that the terminal of the support GSM/TD-SCDMA bimodulus of the embodiment of the invention is switched;
Fig. 3 is the structural representation of the RF signal receiving and s ending module of one embodiment of the invention;
Fig. 4 is the schematic flow sheet of changing method of the support multimode terminal of the embodiment of the invention;
Fig. 5 is in the handoff procedure of one embodiment of the invention, the course of work schematic diagram of phase-locked loop.
Embodiment
For technical problem, technical scheme and advantage that the embodiment of the invention will be solved is clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The invention provides a kind of RF signal receiving and s ending device of supporting multimode, comprising: receiver module, be used for received RF signal, the signal of described reception is carried out down-conversion, and after the signal after the down-conversion carried out analog-to-digital conversion, input base band control module; Transmitter module is used for the signal of base band control module input is carried out digital-to-analogue conversion, carries out launching after the up-conversion again; Phase-locked loop module is used to described receiver module and transmitter module that local oscillation signal is provided, and comprises at least two phase-locked loops, and the same time only has a phase-locked loop to be in the operating state that local oscillation signal is provided.
The embodiment of the invention provides a kind of RF receiving/transmission device of supporting multimode, exemplarily, provides a kind of RF receiving/transmission device of the GSM/TD-SCDMA of support bimodulus, and exemplarily, this RF receiving/transmission device is the single chip radio frequency R-T unit.
Preferably, in the RF signal receiving and s ending device of the embodiment of the invention, described phase-locked loop module also comprises: switch module, be connected with described receiver module, sending module and described at least two phase-locked loops, be used for according to the instruction of base band control module input providing the phase-locked loop of local oscillation signal to switch for described receiver module or sending module.
Fig. 1 is the structural representation of terminal of the support multimode of the embodiment of the invention.The terminal of the support multimode of the embodiment of the invention utilizes the RF signal receiving and s ending device of support multimode of the embodiment of the invention as the RF signal receiving and s ending module, realizes the radio-frequency receiving-transmitting telecommunication function.Such as Fig. 1, the terminal of the support multimode of this embodiment comprises: RF signal receiving and s ending module and base band control module,
Described RF signal receiving and s ending module comprises:
Receiver module is used for received RF signal, and the signal of described reception is carried out down-conversion, and after the signal after the down-conversion carried out analog-to-digital conversion, inputs described base band control module;
Transmitter module is used for the signal of described base band control module input is carried out digital-to-analogue conversion, carries out launching after the up-conversion again;
Phase-locked loop module is used to described receiver module and/or transmitter module that local oscillation signal is provided, and comprises at least two phase-locked loops, and the same time only has a phase-locked loop to be in the operating state that local oscillation signal is provided;
Described base band control module comprises:
The first determination module is used for determining the current residing mode of operation of terminal and operating state;
The second determination module is used for determining the working frequency points of adjacent cell and the mode of operation of adjacent cell according to the adjacent cell measurement result who obtains;
PLL control module, be used for when the switching that terminal wants to carry out belongs to the predetermined signal strength signal intensity that need carry out switch mode that phase-locked loop switches and described adjacent cell greater than predetermined the first threshold value, open in the current not in running order phase-locked loop, and the frequency point setting that the described phase-locked loop of opening is phase-locked is the working frequency points of described adjacent cell; And in the signal strength signal intensity of described adjacent cell during greater than predetermined the second threshold value, the base band control module is carried out the switching of phase-locked loop, the phase-locked loop that local oscillation signal is provided is switched to the described phase-locked loop of opening, and namely switching to phase-locked frequency point setting is the described phase-locked loop of the working frequency points of described adjacent cell.
In the specific implementation, after the mode of operation of the current residing mode of operation of terminal and adjacent cell was determined, switch mode can correspondingly be determined.
In the specific implementation, terminal periodic is measured adjacent cell, and the result of measurement comprises the signal strength signal intensity of adjacent cell, and exemplarily, the signal strength signal intensity of adjacent cell can recently represent by the performance number of adjacent cell signal or the measurement of noise.
The embodiment of the invention provides a kind of terminal of supporting multimode, exemplarily, provides a kind of terminal of the GSM/TD-SCDMA of support bimodulus, and terminal works shares a cover RF signal receiving and s ending device when GSM pattern and TD-SCDMA pattern.
The support bimodulus of the embodiment of the invention is such as the GSM of support and the terminal of TD-SCDMA bimodulus, in the RF signal receiving and s ending module, be provided with two phase-locked loops, utilize two phase-locked loops, when terminal generation handover, can be undertaken frequently standby by opening first current untapped phase-locked loop, and when the signal of adjacent cell satisfies predetermined condition, the phase-locked loop of work at present is switched to above-mentioned standby phase-locked loop frequently, this scheme is because frequently standby in advance, when need switch, be directly switch to another phase-locked loop, can finish switching shorter switching time, thereby can support the handoff scenario that to support by a phase-locked loop, exemplarily, switch to accepting state under the TD-SCDMA residential quarter such as the accepting state under from the GSM residential quarter, or the alien frequencies switching of the adjacent time-slots in the TD-SCDMA residential quarter etc., thereby utilize technical scheme of the present invention can support all handoff scenario under the GSM/TD-SCDMA bimodulus.
The technical scheme of the embodiment of the invention is on the basis that the required time of various different switch modes of multimode terminal such as GSM/TD-SCDMA dual-mode terminal is analyzed, by opening in advance another phase-locked loop, and make another phase-locked loop frequently standby, make two between the phase-locked loop switching time and the phase-locked sum of phase-locked loop can satisfy required requirement switching time of application scenarios, thereby the handoff scenario that the single chip solution that can support prior art can't be supported, switch to accepting state under the TD-SCDMA residential quarter such as the accepting state under the GSM residential quarter, or the alien frequencies switching of the adjacent time-slots in the TD-SCDMA residential quarter etc., thereby can support all application scenarioss under multimode such as the bimodulus.
Fig. 2 is the switch mode schematic diagram that the terminal of the support GSM/TD-SCDMA bimodulus of the embodiment of the invention is switched.Such as Fig. 2, show the kind of the switch mode of the terminal of supporting the GSM/TD-SCDMA bimodulus.Among Fig. 2,2G is second generation communication system, represents the GSM pattern; Tx represents reflective condition; Rx represents accepting state.The below describes the switching mode corresponding to multiple switch mode of the terminal of support GSM/TD-SCDMA bimodulus.
The present inventor passes through the analysis of required time of the various different switch modes of GSM/TD-SCDMA dual-mode terminal, determines following switch mode and only utilizes a phase-locked loop to realize, and need to utilize two phase-locked loops to realize:
GSM emission state (being 2G Tx state) switches to TD-SCDMA accepting state (being TD Rx state);
GSM accepting state (being 2G Rx state) is to TD-SCDMA emission state (being TD Tx state);
The GSM accepting state is to the TD-SCDMA accepting state;
The TD-SCDMA emission state is to the GSM accepting state;
The TD-SCDMA accepting state is to the GSM accepting state;
Adjacent time-slots TD-SCDMA emission state switches to the alien frequencies of TD-SCDMA accepting state;
Adjacent time-slots TD-SCDMA accepting state is switched to the alien frequencies of TD-SCDMA emission state.
The switching that the present inventor also determines following switch mode can realize by the operating state that changes a phase-locked loop:
Switch to another GSM residential quarter from a GSM residential quarter;
In the TD-SCDMA residential quarter or the minizone carry out with frequently switching.
All switch modes of GSM/TD-SCDMA dual-mode terminal can be divided into two class switching modes: a kind of is to need not to utilize two phase-locked loops, only the operating state of the phase-locked loop of work at present need to be changed, and the frequency that namely changes current phase-locked loop locking gets final product; Another kind is to utilize two phase-locked loops, and is frequently standby by opening in advance another phase-locked loop, switching to this another phase-locked loop.As a kind of concrete implementation, can in terminal as in RF signal receiving and s ending device, deposit in advance the corresponding relation between switch mode and the switching mode in, exemplarily, as storing in the mode of table, when concrete the switching, only need this corresponding relation of inquiry, can determine whether to open another phase-locked loop.
Preferably, in the terminal of the embodiment of the invention, PLL control module, be further used for switching to another GSM residential quarter when terminal switching to from a GSM residential quarter of wanting to carry out, or in the TD-SCDMA residential quarter or the same frequency that carries out of minizone when switching, the state of the phase-locked loop by changing work at present is realized the switching of described terminal.
Preferably, phase-locked loop module also comprises switch module, and PLL control module realizes the switching of described phase-locked loop by controlling described switch module.Exemplarily, switch module, be connected with described receiver module, sending module and described at least two phase-locked loops, be used for according to the instruction of base band control module input providing the phase-locked loop of local oscillation signal to switch for described receiver module and/or sending module.。
Fig. 3 is the structural representation of the RF signal receiving and s ending module of one embodiment of the invention.Such as Fig. 3, in this example, the receiver module of RF signal receiving and s ending module 301 comprises: a plurality of low noise amplifiers (LNA) 302 exemplarily can be 6; Frequency mixer 303; Channel model 304; Analog to digital converter (ADC) 305 etc.Receiver module can carry out the reception of four frequency ranges of GSM and all frequency ranges of TD-CDMA, receive signal and become base-band analog signal through down-conversion, amplification after processing, again through obtaining baseband digital signal after the ADC sampling, the baseband digital signal that obtains is by the first base band input/output interface 316 input base band control modules, and the base band control module realizes by baseband chip (BB) in this example.The baseband digital signal that receiver module is obtained is processed and can be judged the residing state of terminal.Embodiments of the invention are for the single mode receiver of TD-SCDMA, and it is much wide that the operating frequency range of frequency mixer and amplifier is wanted.Transmitter module comprises: digital to analog converter (DAC) 306, low pass filter 307, frequency mixer 308, amplifier 309 etc., transmitter module is being that the I/Q digital signal is converted to analog signal from the two-way orthogonal signalling of base band control module by the input of the second base band input/output interface 317, after through up-conversion, amplify and launch after processing.For TD-SCDMA single mode transmitter, it is much wide that the operating frequency range of frequency mixer and amplifier is wanted.Phase-locked loop module, comprise two phase-locked loops and a switches set, these two phase-locked loops are the first phase-locked loop pll 1 and the second phase-locked loop pll 2, the switching that will carry out when terminal belongs to and pre-determines when needing situation that two phase-locked loops finish, for example to switch to the TD-CDMA residential quarter and be in accepting state or terminal is carried out adjacent time-slots in the TD-SCDMA residential quarter alien frequencies when switching when terminal is in accepting state in the GSM residential quarter, suppose that switching front the first phase-locked loop is in the operating state that local oscillation signal is provided, and realizes by switching to the second phase-locked loop (PLL2) from the first phase-locked loop (PLL1) fast.Particularly, realize quick switching by opening first the second phase-locked loop.Carry out to another GSM residential quarter or in the TD-SCDMA residential quarter or between the residential quarter with frequently switching if only carry out the GSM residential quarter, just the state with current phase-locked loop changes, and makes it be phase-locked to another required frequency, and does not switch to another phase-locked loop.The change of above-mentioned phase-locked loop state or the switching of phase-locked loop are controlled realization by the base band control module, control realization by baseband chip BB in this example.
In this example, such as Fig. 3, switches set comprises two single-pole double-throw switch (SPDT)s, comprises altogether: four contacts, contact 310 to contact 313, contact cutter (the first contact cutter) 313 and contact cutter (the second contact cutter) 314.Wherein, contact 310 is connected with the frequency mixer 303 of receiver module, and contact 311 is connected with the frequency mixer 308 of transmitter module, and contact 312 is connected with the first phase-locked loop, and contact 313 is connected with the second phase-locked loop; One end of contact cutter 314 is by being connected with the first phase-locked loop with contact 312, and an end of contact cutter 315 is connected with the second phase-locked loop by contact 313.Contact with contact 310 or contact 311 by controlling the first contact cutter or the second contact cutter, control the first phase-locked loop or the second phase-locked loop and be connected with receiver module or transmitter module, think that the frequency mixer of receiver module or transmitter module provides local oscillation signal.
The embodiment of the invention also provides a kind of changing method of supporting the terminal of multimode, be applied to support the terminal of GSM/TD-SCDMA bimodulus, described terminal comprises: RF signal receiving and s ending module and base band control module, described RF signal receiving and s ending module comprises: receiver module, transmitter module and phase-locked loop module, described phase-locked loop module, be used to described receiver module and/or transmitter module that local oscillation signal is provided, described phase-locked loop module comprises: at least two phase-locked loops, the same time only has a phase-locked loop to be in the operating state that local oscillation signal is provided.Such as Fig. 4, the changing method of the terminal of the support multimode of the embodiment of the invention comprises the steps:
In the specific implementation, after in step 403, opening in the current not in running order phase-locked loop, signal strength signal intensity to adjacent cell is further measured, exemplarily, power or signal to noise ratio to adjacent cell are further measured, the signal strength signal intensity that shows adjacent cell when measured value is carried out the switching of phase-locked loop during greater than predetermined the second threshold value.
The terminal of the support GSM/TD-SCDMA bimodulus of the embodiment of the invention can utilize the terminal switching method of the embodiment of the invention to switch when carrying out the mode of operation switching.
Preferably, the changing method of the embodiment of the invention before the described step 303, also comprises:
Corresponding relation between pre-set switch mode and the switching mode, described switching mode comprises: the state that changes the phase-locked loop of current activation; With, carry out phase-locked loop and switch.
Preferably, the changing method of the embodiment of the invention is characterized in that, the switch mode that predetermined need carry out the phase-locked loop switching comprises following at least a:
The GSM emission state switches to the TD-SCDMA accepting state;
The GSM accepting state is to the TD-SCDMA emission state;
The GSM accepting state is to the TD-SCDMA accepting state;
The TD-SCDMA emission state is to the GSM accepting state;
The TD-SCDMA accepting state is to the GSM accepting state;
Adjacent time-slots TD-SCDMA emission state switches to the alien frequencies of TD-SCDMA accepting state;
Adjacent time-slots TD-SCDMA accepting state is switched to the alien frequencies of TD-SCDMA emission state.
Preferably, the changing method of the embodiment of the invention, after the described step 402, when terminal switching to from a GSM residential quarter of wanting to carry out switches to another GSM residential quarter, or in the TD-SCDMA residential quarter or the same frequency that carries out of minizone when switching, the state of the phase-locked loop by changing work at present is realized the switching of described terminal.
Preferably, the changing method of the embodiment of the invention in the described step 404, is realized the switching of described phase-locked loop by the control switch module.
In the specific implementation, can at first determine the working frequency points of terminal, and judge that being operated in the GSM pattern still is operated in the TD-SCDMA pattern.If be operated in the GSM pattern, accepting state works in different frequencies with emission state PLL, if be operated in the TD-SCDMA pattern, accepting state works in identical frequency with emission state PLL.Can select suitable switching mode according to switch mode, for example when terminal the GSM residential quarter be in accepting state switch to the TD-CDMA residential quarter and be in accepting state and the TD-SCDMA residential quarter in carry out adjacent time-slots alien frequencies when switching, realize such as the second phase-locked loop (PLL2) by switching to another phase-locked loop from a phase-locked loop such as the first phase-locked loop (PLL1) fast.Carry out to another GSM residential quarter or in the TD-SCDMA residential quarter or between the residential quarter with frequently switching if only carry out the GSM residential quarter, the state change that is the phase-locked loop of current activation does not switch to another phase-locked loop.Judge whether to open the second phase-locked loop by power measurement and switch mode to adjacent cell, the attitude of remaining stationary in the time of need not opening, exemplarily, can be that power to adjacent cell carries out periodic measurement, when the power that measures adjacent cell reaches predetermined the first threshold value, open the second phase-locked loop.In the time of need to opening the second phase-locked loop, further carry out the measurement of power or signal to noise ratio, according to the measurement result to power or signal to noise ratio, judge whether to switch to another phase-locked loop; After opening the second phase-locked loop, continue to measure adjacent cell power, continue to strengthen such as adjacent cell power, when reaching predetermined the second threshold value, just enable switches set and carry out the switching of phase-locked loop, the phase-locked loop that local oscillation signal is provided is switched to this open in advance and the second stable phase-locked loop, so just saved the locking time of phase-locked loop.Wherein, the second threshold value is greater than the first threshold value.After opening the second phase-locked loop, continue to measure adjacent cell power, if the power of adjacent cell does not continue to be enhanced to the second threshold value, then do not switch.
The below needs to switch to from the emission state of GSM residential quarter the accepting state of TD-SCDMA residential quarter with terminal, namely switch to TD Rx state from 2G Tx state and describe.Fig. 5 is in this routine handoff procedure, the course of work schematic diagram of phase-locked loop.In this embodiment, suppose that originally terminal is in the GSM residential quarter and is in emission state, i.e. 2G Tx state shown in Figure 5, the first phase-locked loop is in state of activation under this state, be that transmitting chain provides local oscillation signal by the first phase-locked loop for transmitter module, the second phase-locked loop is in closed condition.Terminal is determined to switch to the TD residential quarter and to begin from 2G Tx state to receive through power measurement periodically, i.e. TD Rx state, and terminal judges goes out to carry out the switching of two phase-locked loops.The base band control module is passed through the judgement to power measurement and the switch mode of adjacent cell, because switch mode is for to switch to TD Rx state from 2G Tx state, need to switch phase-locked loop and finish switching, and the power of adjacent cell reaches the first predetermined threshold value, then determine and to open the second phase-locked loop and receiver, open the second phase-locked loop, the frequency that its locking frequency is adjacent cell is set, then, further carry out again the measurement of power or signal to noise ratio, according to the measurement result of signal to noise ratio, if signal to noise ratio has dropped to certain thresholding, carry out the switching of phase-locked loop with regard to the starting switch group, switch to and open and the second stable phase-locked loop, saved like this time of switching, after the switching, be that receiver provides local oscillation signal by the second phase-locked loop to receiver module, the first phase-locked loop is in closed condition.At this moment just switch to the receiver of TD, finished switching.As shown in Figure 5, after opening the second phase-locked loop, switch to the second phase-locked loop before, the first phase-locked loop still is in the operating state that local oscillation signal is provided, namely open the second phase-locked loop after, switch to the second phase-locked loop before, first, second phase-locked loop all is in open mode.
Such as Fig. 5, also show when terminal switches to 2G Rx state from TD Rx state, need carry out the switching of phase-locked loop, switch to the first phase-locked loop by the second phase-locked loop, after the switching, the second phase-locked loop is closed, and the first phase-locked loop activates and provides local oscillation signal to receiver module.Concrete process and the above-mentioned 2G Tx state that switches is similar to the switching of TD Rx state, does not repeat them here.
Embodiments of the invention are take two phase-locked loops as example, but the present invention is not limited to two phase-locked loops, can also exist three or four phase-locked loops to realize supporting multimode to switch, during specific implementation, before switching, can open first one or more in the current a plurality of phase-locked loops that are in closed condition, and then switch, the process of switching does not repeat them here with the process that above-mentioned two phase-locked loops switch.
The above is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the described principle of the embodiment of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a terminal of supporting multimode is characterized in that, comprising: RF signal receiving and s ending module and base band control module,
Described RF signal receiving and s ending module comprises:
Receiver module is used for received RF signal, and the signal of described reception is carried out down-conversion, and after the signal after the down-conversion carried out analog-to-digital conversion, inputs described base band control module;
Transmitter module is used for the signal of described base band control module input is carried out digital-to-analogue conversion, carries out launching after the up-conversion again;
Phase-locked loop module is used to described receiver module and/or transmitter module that local oscillation signal is provided, and comprises at least two phase-locked loops, and the same time only has a phase-locked loop to be in the operating state that local oscillation signal is provided;
Described base band control module comprises:
The first determination module is used for determining the current residing mode of operation of terminal and operating state;
The second determination module is used for determining the working frequency points of adjacent cell and the mode of operation of adjacent cell according to the adjacent cell measurement result who obtains;
PLL control module, be used for when the switching that terminal wants to carry out belongs to the predetermined signal strength signal intensity that need carry out switch mode that phase-locked loop switches and described adjacent cell greater than predetermined the first threshold value, open in the current not in running order phase-locked loop, and the frequency point setting that the described phase-locked loop of opening is phase-locked is the working frequency points of described adjacent cell; And during greater than predetermined the second threshold value, carry out the switching of phase-locked loop in the signal strength signal intensity of described adjacent cell, and the phase-locked loop that local oscillation signal is provided is switched to the described phase-locked loop of opening, described the second threshold value is greater than described the first threshold value.
2. terminal according to claim 1 is characterized in that, described terminal is supported GSM and TD-SCDMA bimodulus, and the switch mode that described predetermined need carry out the phase-locked loop switching comprises following at least a:
The GSM emission state switches to the TD-SCDMA accepting state;
The GSM accepting state is to the TD-SCDMA emission state;
The GSM accepting state is to the TD-SCDMA accepting state;
The TD-SCDMA emission state is to the GSM accepting state;
The TD-SCDMA accepting state is to the GSM accepting state;
Adjacent time-slots TD-SCDMA emission state switches to the alien frequencies of TD-SCDMA accepting state;
Adjacent time-slots TD-SCDMA accepting state is switched to the alien frequencies of TD-SCDMA emission state.
3. terminal according to claim 1 and 2 is characterized in that, described phase-locked loop module also comprises switch module, and described PLL control module realizes the switching of described phase-locked loop by controlling described switch module.
4. terminal according to claim 1 and 2, it is characterized in that, described PLL control module, be further used for switching to another GSM residential quarter when terminal switching to from a GSM residential quarter of wanting to carry out, or in the TD-SCDMA residential quarter or the same frequency that carries out of minizone when switching, the state of the phase-locked loop by changing work at present is realized the switching of described terminal.
5. changing method of supporting the terminal of multimode, described terminal comprises: RF signal receiving and s ending module and base band control module, it is characterized in that, described RF signal receiving and s ending module comprises: receiver module, transmitter module and phase-locked loop module, described phase-locked loop module, be used to described receiver module and/or transmitter module that local oscillation signal is provided, described phase-locked loop module comprises: at least two phase-locked loops, the same time only has a phase-locked loop to be in the operating state that local oscillation signal is provided, and described method comprises the steps:
Steps A, base band control module are determined the current residing mode of operation of terminal and operating state;
Step B, the base band control module obtains the measurement result of adjacent cell, and determines the working frequency points of adjacent cell and the mode of operation of adjacent cell according to the measurement result of described adjacent cell;
Step C, when the pattern of the switching of terminal belongs to the predetermined signal strength signal intensity that need carry out switch mode that phase-locked loop switches and described adjacent cell greater than predetermined the first threshold value, the base band control module is opened in the current not in running order phase-locked loop, and with the frequency point setting of the described phase-locked loop of the opening working frequency points in described adjacent cell;
Step D, when the signal strength signal intensity of described adjacent cell during greater than predetermined the second threshold value, the base band control module is carried out the switching of phase-locked loop, the phase-locked loop that local oscillation signal is provided is switched to the phase-locked loop of opening among the described step C, and described the second threshold value is greater than described the first threshold value.
6. changing method according to claim 5 is characterized in that, before the described step C, also comprises:
Corresponding relation between pre-set switch mode and the switching mode, described switching mode comprises: the state that changes the phase-locked loop of current activation; With, carry out phase-locked loop and switch.
7. according to claim 5 or 6 described changing methods, it is characterized in that, described terminal is supported GSM and TD-SCDMA bimodulus, and described predetermined need carry out the switch mode that phase-locked loop switches and comprise following at least a:
The GSM emission state switches to the TD-SCDMA accepting state;
The GSM accepting state is to the TD-SCDMA emission state;
The GSM accepting state is to the TD-SCDMA accepting state;
The TD-SCDMA emission state is to the GSM accepting state;
The TD-SCDMA accepting state is to the GSM accepting state;
Adjacent time-slots TD-SCDMA emission state switches to the alien frequencies of TD-SCDMA accepting state;
Adjacent time-slots TD-SCDMA accepting state is switched to the alien frequencies of TD-SCDMA emission state.
8. changing method according to claim 5, it is characterized in that, after the described step B, when terminal switching to from a GSM residential quarter of wanting to carry out switches to another GSM residential quarter, or in the TD-SCDMA residential quarter or the same frequency that carries out of minizone when switching, the state of the phase-locked loop by changing work at present is realized the switching of described terminal.
9. changing method according to claim 5 is characterized in that, among the described step D, realizes the switching of described phase-locked loop by the control switch module.
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| CN102761858B (en) * | 2011-04-27 | 2015-06-03 | 中兴通讯股份有限公司 | Dual-mode single-antenna terminal and radio sharing control method thereof |
| CN103974465B (en) * | 2013-01-24 | 2018-04-03 | 联发科技股份有限公司 | communication device and its scheduling method |
| CN103260268B (en) * | 2013-04-15 | 2016-02-17 | 开曼群岛威睿电通股份有限公司 | Be applicable to mobile communications device and its integrated circuit of multi-mode communication |
| CN105763188B (en) * | 2014-12-19 | 2019-02-05 | 联芯科技有限公司 | Improve the method and apparatus of transmitter RF index |
| ES2761581T3 (en) * | 2015-08-20 | 2020-05-20 | Huawei Tech Co Ltd | Remote radio, receiver and base station unit |
| CN105223555B (en) * | 2015-09-22 | 2017-12-26 | 北京理工雷科电子信息技术有限公司 | A kind of wideband low noise frequency modulation signal source |
| CN106559737B (en) * | 2015-09-28 | 2019-11-05 | 展讯通信（上海）有限公司 | Bluetooth operating mode switching control method and device |
| CN106019327A (en) * | 2016-05-06 | 2016-10-12 | 中国民用航空总局第二研究所 | Same-channel signal digital separation system and method for navigation equipment online measurement |
| CN109640382B (en) * | 2019-01-11 | 2022-01-11 | 中信科移动通信技术股份有限公司 | Micro base station and power supply control method of micro base station |
| CN112242853B (en) * | 2019-07-18 | 2022-08-30 | 深圳市海能达通信有限公司 | Data communication method and device |
| CN114076962A (en) * | 2020-08-21 | 2022-02-22 | 北京合众思壮科技股份有限公司 | Signal processing device, method and system |
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| CN101438503A (en) * | 2004-11-03 | 2009-05-20 | 伟俄内克斯研究公司 | Ultrawideband CMOS transceiver |
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| AU2003201479A1 (en) * | 2002-02-20 | 2003-09-09 | Koninklijke Philips Electronics N.V. | Mobile multimode terminal with joint power amplifier |
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| CN101438503A (en) * | 2004-11-03 | 2009-05-20 | 伟俄内克斯研究公司 | Ultrawideband CMOS transceiver |
| CN201114027Y (en) * | 2007-09-18 | 2008-09-10 | 深圳市金溢科技有限公司 | Double channel radio frequency transmitting/receiving device for dedicated short distance communication |
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