Summary of the invention
The embodiment of the invention provides power amplification protecting method and the device in a kind of digital pre-distortion, to solve power amplifier because of the problem that causes damage unusually of numeric field.
The embodiment of the invention provides the power amplifier protection device in a kind of digital pre-distortion; this device comprises that system signal generation module, digital pre-distortion module, power amplifier protection module, D/A converter module, power amplifier analog link module and the analog-to-digital conversion module that connects successively and the power amplifier that links to each other with described power amplifier protection module protection recover module; this device comprises that also power amplifier guard mode acquisition module, power amplifier protect automatic detection module and power amplifier protection trigger module, wherein:
Described power amplifier guard mode acquisition module is used for obtaining digital pre-distortion front signal power and the corresponding relation that compensates energy and protection thresholding, and described corresponding relation and protection thresholding are deposited in the internal memory of described power amplifier guard mode acquisition module;
Described power amplifier is protected automatic detection module, be used for obtaining detection signal power, from described internal memory, extract described corresponding relation and protection thresholding, and judge according to described detection signal power, described corresponding relation and described protection thresholding whether the state of current digital pre-distortion satisfies the power amplifier protective condition, if satisfy, then transmit control signal to described power amplifier protection trigger module;
Described power amplifier protection trigger module is used for the described control signal triggering selection power amplifier protected mode of protecting automatic detection module to send according to described power amplifier.
Preferably, described power amplifier is protected automatic detection module, also is used for if the state of current digital pre-distortion does not satisfy the power amplifier protective condition, then starts described power amplifier protection and recovers module.
Preferably, the input of described power amplifier guard mode acquisition module links to each other with the output of the output of described system signal generation module, described digital pre-distortion module and the output of described analog-to-digital conversion module respectively;
Described power amplifier guard mode acquisition module; concrete being used for obtains the digital pre-distortion front signal, obtains signal behind the digital pre-distortion and obtain feedback signal from the output of described analog-to-digital conversion module from the output of described digital pre-distortion module from the output of described system signal generation module, obtains described corresponding relation and described protection thresholding according to signal power and feedback signal power behind digital pre-distortion front signal power, the digital pre-distortion.
Preferably; described power amplifier is protected automatic detection module; concrete arbitrary signal for the feedback signal of signal and the output of described analog-to-digital conversion module behind the digital pre-distortion of the digital pre-distortion front signal that obtains described system signal generation module output, the output of described digital pre-distortion module, the power of described signal is detection signal power.
Preferably, described power amplifier protected mode is any in the following protected mode:
The peak value threshold protected mode, identify power automatically and adjust protected mode, average power thresholding protected mode, bandwidth identification protecting pattern, digital pre-distortion coefficient identification protecting pattern and digital pre-distortion coefficient energy constraint thresholding protected mode.
The embodiment of the invention also provides the power amplification protecting method in a kind of digital pre-distortion, and this method comprises:
Obtain digital pre-distortion front signal power and the corresponding relation that compensates energy and protection thresholding, and described corresponding relation and protection thresholding are deposited in the internal memory;
Obtain detection signal power; from described internal memory, extract described corresponding relation and protection thresholding; and judge according to described detection signal power, described corresponding relation and described protection thresholding whether described current power amplifier satisfies the power amplifier protective condition; if satisfy; then triggering selection power amplifier protected mode is finished and this power amplifier protected mode corresponding parameters configuration.
Preferably, describedly judge whether described current power amplifier satisfies after the power amplifier protective condition, and described method also comprises:
If current power amplifier does not satisfy described power amplifier protective condition, then judge whether to satisfy the power amplifier protective condition that resets, if satisfy, then recover the raw parameter configuration of described power amplifier, if do not satisfy, then continue to judge whether current power amplifier satisfies the power amplifier protective condition.
Preferably, described corresponding relation and the protection thresholding that obtains current power amplifier power and compensation energy comprises:
Signal and feedback signal behind acquisition digital pre-distortion front signal, the digital pre-distortion are obtained described corresponding relation and described protection thresholding according to signal power and feedback signal power behind digital pre-distortion front signal power, the digital pre-distortion.
Preferably, described acquisition detection signal power comprises:
Obtain the arbitrary signal in the signal and feedback signal behind described digital pre-distortion front signal, the digital pre-distortion, the power of described signal is detection signal power.
Preferably; described acquisition detection signal power; from described internal memory, extract described corresponding relation and protection thresholding; and judge according to described detection signal power, described corresponding relation and described protection thresholding whether described current power amplifier satisfies the power amplifier protective condition; if satisfy; then triggering selection power amplifier protected mode is finished and this power amplifier protected mode corresponding parameters configuration, comprising:
Dispose the power output of current power amplifier less than rated power;
From described internal memory, extract described corresponding relation and protection thresholding;
Detect the power of digital pre-distortion front signal;
Judge that whether the offset of this power correspondence is greater than described protection thresholding, if greater than described protection thresholding, then reduce described power output, if smaller or equal to described protection thresholding, then judge whether to start automatic identification power adjustment protection, if do not start, judge then whether described power output reaches described rated power, if reach, then stop to adjust described power output, if do not reach, then increase described power output; Continue to detect the power of digital pre-distortion front signal.
Above-mentioned power amplification protecting method and device have adopted extraction power amplifier parameter and Automatic Measurement Technique, have not only improved the accuracy of power amplifier protection, and have improved the stability of power amplifier protection, have increased the real-time of power amplifier protection simultaneously.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, hereinafter will be elaborated to embodiments of the invention by reference to the accompanying drawings.Need to prove that under the situation of not conflicting, the embodiment among the application and the feature among the embodiment be combination in any mutually.
As shown in Figure 1; it is the structural representation of the power amplifier protection device embodiment in the digital pre-distortion of the present invention; this device comprises that system signal generation module 101, digital pre-distortion module 102, power amplifier protection module 103, D/A converter module 104, power amplifier analog link module 105, the analog-to-digital conversion module 106 that connects successively and the power amplifier that links to each other with described power amplifier protection module 103 protection recover module 107; this device comprises that also power amplifier guard mode acquisition module 108, power amplifier protect automatic detection module 109 and power amplifier protection trigger module 110, wherein:
Described power amplifier guard mode acquisition module is used for obtaining digital pre-distortion front signal power and the corresponding relation that compensates energy and protection thresholding, and described corresponding relation and protection thresholding are deposited in the internal memory of described power amplifier guard mode acquisition module;
Described power amplifier is protected automatic detection module, be used for obtaining detection signal power, from described internal memory, extract described corresponding relation and protection thresholding, and judge according to described detection signal power, described corresponding relation and described protection thresholding whether the state of current digital pre-distortion satisfies the power amplifier protective condition, if satisfy, then transmit control signal to described power amplifier protection trigger module;
Described power amplifier protection trigger module is used for the described control signal triggering selection power amplifier protected mode of protecting automatic detection module to send according to described power amplifier.
Wherein, the input of described power amplifier guard mode acquisition module links to each other with the output of the output of described system signal generation module, described digital pre-distortion module and the output of described analog-to-digital conversion module respectively; As shown in Figure 1.Described power amplifier guard mode acquisition module; concrete being used for obtains the digital pre-distortion front signal, obtains signal behind the digital pre-distortion and obtain feedback signal from the output of described analog-to-digital conversion module from the output of described digital pre-distortion module from the output of described system signal generation module, obtains described corresponding relation and described protection thresholding according to signal power and feedback signal power behind digital pre-distortion front signal power, the digital pre-distortion.
In addition; described power amplifier is protected automatic detection module; concrete arbitrary signal for the feedback signal of signal and the output of described analog-to-digital conversion module behind the digital pre-distortion of the digital pre-distortion front signal that obtains described system signal generation module output, the output of described digital pre-distortion module, the power of described signal is detection signal power.
Use process that above-mentioned power amplifier protection device carries out power amplifier protection as shown in Figure 2, this process may further comprise the steps:
Step 201, system start, and produce system signal;
Step 202, unlatching digital pre-distortion module;
Step 203, unlatching power amplifier guard mode acquisition module obtain digital pre-distortion front signal power and the corresponding relation that compensates energy and protection thresholding;
Step 204, with corresponding relation and the protection thresholding be stored in the internal memory of power amplifier guard mode acquisition module;
Step 205, unlatching power amplifier are protected automatic detection module;
Step 206, from the internal memory of power amplifier guard mode acquisition module, extract corresponding relation and protection thresholding;
Wherein, above-mentioned corresponding relation and protection thresholding can once extract, also can real-time update;
Step 207, the state of current digital pre-distortion is detected, judge whether to satisfy the power amplifier protective condition, if satisfy execution in step 208; Otherwise, execution in step 210;
Step 208, enter power amplifier protection trigger module, select corresponding power amplifier protected mode;
The power amplifier protected mode can comprise multiple mode, for example: the peak value threshold protection, identify the power adjustment automatically, the protection of average power thresholding, bandwidth identification protecting, digital pre-distortion coefficient identification protecting, digital pre-distortion coefficient energy constraint thresholding protection etc.
Step 209, startup power amplifier protection module are finished corresponding power amplifier protected mode, and carry out corresponding ALM and system parameters configuration adjustment; Finish;
Step 210, judge whether to satisfy the power amplifier protective condition that resets, if then start the power amplifier protection and recover module and carry out the recovery of system and resetting of power amplifier protection module; Otherwise, turn to step 207.
Adjusting protected mode with automatic identification power below is that embodiment describes the automatic identification power adjustment protection implementation procedure in the digital pre-distortion, and as shown in Figure 3, this implementation procedure is as follows:
Step 301, system environments start;
Step 302, at power amplifier guard mode acquisition module word predistortion front signal power and the compensation corresponding curve of energy and the thresholding of counting of falling into a trap, corresponding curve and thresholding stored and internal memory in;
The relative rated power of the power output of step 303, system configuration power amplifier is less than 3dB;
Step 304, read power amplifier protection thresholding;
The power detection that step 305, the protection of unlatching power amplifier detect automatically;
Step 306, judge the power correspondence offset whether greater than the protection thresholding, if greater than thresholding, execution in step 307, if less than thresholding, execution in step 308;
Step 307, the protection of startup power amplifier, the power output downward modulation 0.5dB of system turns to step 305;
Step 308, judge whether the power amplifier protection module starts, if start, then execution in step 309, if start, then execution in step 310;
Step 309, judge whether to reach rated power, if do not reach, then system's power output is transferred big 0.5dB, turns to step 305; If reach, then no longer adjust power output and continue power amplifier protection detection;
Step 310, judge whether to satisfy power amplifier protection recovery condition, if satisfy, the power amplifier protection module that then resets turns to step 305, if do not satisfy, then turns to step 305.
Said apparatus and method are not limited to only the GSM multi-carrier signal be carried out the power amplifier protection of predistortion, for TD_SCDMA signal, UMTS signal, LTE signal, WiMAX, LTE﹠amp; UMTS mixes broadband signals such as mould, and its power amplifier protection effect is better than traditional digital power amplifier resist technology equally; In addition, also be applicable to GSM, UMTS, LTE, WiMAX and broadband systems such as TD-SCDMA single mode or bimodulus.
Above-mentioned power amplifier protection device; adopt extraction power amplifier parameter and Automatic Measurement Technique, not only improved the accuracy of power amplifier protection, and improved the stability of power amplifier protection; increased the real-time of power amplifier protection simultaneously, made this device more be applicable to the digital pre-distortion treatment system of quick renewal.
The embodiment of the invention also provides the power amplification protecting method in a kind of digital pre-distortion, and this method is that main body is described with the power amplifier protection device in the digital pre-distortion, and this method comprises:
Step 1, obtain digital pre-distortion front signal power with the compensation energy corresponding relation and the protection thresholding, and with described corresponding relation and the protection thresholding deposit in the internal memory;
This step comprises: signal and feedback signal behind acquisition digital pre-distortion front signal, the digital pre-distortion, obtain described corresponding relation and described shutter according to signal power and feedback signal power behind digital pre-distortion front signal power, the digital pre-distortion.
Step 2, acquisition detection signal power; from described internal memory, extract described corresponding relation and protection thresholding; and judge according to described detection signal power, described corresponding relation and described protection thresholding whether described current power amplifier satisfies the power amplifier protective condition; if satisfy; then triggering selection power amplifier protected mode is finished and this power amplifier protected mode corresponding parameters configuration.
Wherein, described acquisition detection signal comprises: obtain the arbitrary signal in the signal and feedback signal behind described digital pre-distortion front signal, the digital pre-distortion, the power of described signal is detection signal power.Described power amplifier protected mode can be in the following protected mode any: the peak value threshold protected mode, identify power automatically and adjust protected mode, average power thresholding protected mode, bandwidth identification protecting pattern, digital pre-distortion coefficient identification protecting pattern and digital pre-distortion coefficient energy constraint thresholding protected mode.
In addition; describedly judge whether described current power amplifier satisfies after the power amplifier protective condition; described method also comprises: if current power amplifier does not satisfy described power amplifier protective condition; then judge whether to satisfy the power amplifier protective condition that resets; if satisfy; then recover the raw parameter configuration of described power amplifier, if do not satisfy, then continue to judge whether current power amplifier satisfies the power amplifier protective condition.
Further; described acquisition detection signal power; from described internal memory, extract described corresponding relation and protection thresholding; and judge according to described detection signal power, described corresponding relation and described protection thresholding whether described current power amplifier satisfies the power amplifier protective condition; if satisfy; then triggering selection power amplifier protected mode is finished and this power amplifier protected mode corresponding parameters configuration, comprising:
Dispose the power output of current power amplifier less than rated power;
From described internal memory, extract described corresponding relation and protection thresholding;
Detect the power of digital pre-distortion front signal;
Judge that whether the offset of this power correspondence is greater than described protection thresholding, if greater than described protection thresholding, then reduce described power output, if smaller or equal to described protection thresholding, then judge whether to start automatic identification power adjustment protection, if do not start, judge then whether described power output reaches described rated power, if reach, then stop to adjust described power output, if do not reach, then increase described power output; Continue to detect the power of digital pre-distortion front signal.
Above-mentioned power amplification protecting method has adopted extraction power amplifier parameter and Automatic Measurement Technique, has not only improved the accuracy of power amplifier protection, and has improved the stability of power amplifier protection, has increased the real-time of power amplifier protection simultaneously.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to finish by program, said procedure can be stored in the computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, only with reference to preferred embodiment the present invention is had been described in detail.Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of the claim scope of the present invention.