CN101594117A

CN101594117A - High efficiency, superlinearity DFFA mobile digital TV and mobile broadband communication power amplifier

Info

Publication number: CN101594117A
Application number: CNA2008100313848A
Authority: CN
Inventors: 陈意辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-26
Filing date: 2008-05-26
Publication date: 2009-12-02

Abstract

The DFFA mobile digital TV and the mobile broadband communication power amplifier of a kind of high efficiency, superlinearity, high-speed adaptive and self-healing control, it adopts tricyclic and two kinds of feed forward architecture of predistortion type to realize the superlinearity amplification; It adopts temperature compensation decay, linear temperature compensation and constant power, unequal power and power synthesis type DOHERTY self-adapted high-efficient matching technique to realize the amplification of high stable high efficiency; It adopts microprocessor interpolation method and optimizing of look-up table wide region and self-locking high-speed adaptive control vector modulator, realizes precision, wide region, stable equilibrium and high-speed adaptive control to each signal and distortion ring and Doherty coupling; It can adopt double-tone IQ modulatedemodulate to heighten the pure extraction that suppresses to realize control signal and residual distortion signal; Its real-time testing state, but report to the police when unusual and self-healing regulate remove unusual.

Description

High efficiency, superlinearity DFFA mobile digital TV and mobile broadband communication power amplifier

Technical field:

The present invention relates to a kind of power amplifier technology, be specifically related to a kind of high efficiency superlinearity DFFA (Doherty ﹠amp; FeedForward Linear Power Amplifiers) mobile digital TV and mobile broadband communication power amplifier technology.

Background technology:

Mobile digital TV and mobile broadband communication adopt m QAM and OFDM modulation technique, and its core technology is to require to realize under high peak-to-average force ratio signal conditioning high efficiency, the high-power amplification of high linearity and high stable broadband.

Existing DPD digital pre-distortion power amplifier technology can improve the linearity, increase substantially efficient with Doherty technology binding energy, but there is the problem of narrow bandwidth in the digital pre-distortion power amplifier technology, is difficult to satisfy the needs of digital terrestrial television emission transmission; DPD digital pre-distortion power amplifier technology is generally 10-15dB to the improvement of the linearity, and high-order QAM (〉=16QAM) to require linearity improvement with OFDM modulation be 20-25dB; Digital terrestrial television emission transmission has multiple working form and pattern, and DPD digital pre-distortion power amplifier technology need be changed algorithm and matched curve, is difficult to satisfy the needs of multi-modulation scheme and multimode operation; DPD digital pre-distortion power amplifier technology input signal is a digital baseband signal, and the digital terrestrial television relay station adopts the RF radio frequency to amplify in order to reduce cost usually, and DPD digital pre-distortion power amplifier technology is difficult to satisfy the needs of above-mentioned relay station.

The linear improvement obviously of existing FFA feedforward adaptive power amplifying technique, and have adaptive stabilizing control, work zone wide, adapt to multi-modulation scheme and series of advantages such as multimode operation and the amplification of RF radio frequency, but have following problem: linearity improvement is limited in scope, general intermodulation suppresses to need to suppress 20-25dBC in the reality sometimes for 15-20dBC; Efficient is low, generally has only 8-18%, causes the cost height, and it is excessive to generate heat, and influences reliability; The adaptive control time is long, generally adopts single-chip microcomputer, ARM, FPGA or DSP mode to control, because program running has the regular hour to add the algorithm complexity, the time that reaches adaptive stabilizing is long; Be difficult to satisfy the needs that high peak-to-average force ratio signal high efficiency is amplified; The distortion delay line is big to power loss, has limited high-power amplification.

The Doherty amplifying technique can significantly improve amplification efficient, but there is following problem in existing technology: require carrier power amplifier and its peak work to be placed on phase place and gain coupling realization high efficiency amplification fully under different temperature and the input power condition; And phase place, gain, the linearity and the efficient of main power amplifier and peak value power amplifier are the function of temperature and input signal strength, are difficult to satisfy the desirable requirement of amplifying of Doherty; Existing Doherty amplifying technique is the two-stage structure for amplifying, in the time of in peak-to-average force ratio is 6dB, can realize high efficiency, but modern digital terrestrial television RF power amplification requires to realize high efficiency and high linear amplification at peak-to-average force ratio during for 6-12dB that existing technology is difficult to satisfy this requirement; Existing Doherty amplifying technique generally realizes the high efficiency amplification at device level, and when realizing that super high power amplifies, it will be very complicated that employing is carried out the synthetic structure of power to a plurality of Doherty modules.

Summary of the invention:

The objective of the invention is to propose new FFA feedforward amplifies, new Doherty amplifies, new self-adaptation control method, self-healing method and with its combination, obtain a kind of high efficiency, superlinearity, low-cost, the mobile digital TV and the mobile broadband communication power amplifier of high-speed adaptive control and self-healing, not only can be used for the mobile digital TV transmitter, also can be used for its relay station and wide-band mobile communication base station, base station and relay station, and can be used for GSM Multi-Carrier Power Amplifier and trunking mobile communication power amplifier, what the present invention was total is achieved in that

Total method is amplified in described new FFA feedforward: it adopts high cancellation techniques and the vector modulator mode of isolating, the realization high accuracy offsets, improve signal cancellation ring and distortion and offset the degree of offseting of ring, thereby reach the power that reduces the error power amplifier, the effect that improves the high linearity of the linearity and broadband; It when causing offseting mismatch because of input power, working temperature and device aging, can come from the lock control signal with the method self check of pure hardware when realizing that signal cancellation or distortion offset, realize the accurate control of high speed stable equilibrium that signal cancellation and distortion offset.It adopts pilot signal analog distortion signal, for better realize self-locking control signal and residual distortion signal extraction, it can be modulated at the mode of two audio signals with the IQ modulation on the pilot signal, thereby has increased the outer interference performance of anti-band when extracting self-locking control signal and residual distortion signal; When it offsets in distortion, adopt multiplication type or the distortion of IQ Demodulation Type coupling that pin is detected, solve the residual pilot detection difficult problem of existing feedforward adapter power amplifier; It has two types of tricyclic and predistortion type DFFA mobile digital TV and mobile broadband communication power amplifiers, can improve the linearity and improve the power of main power amplifier.

Described new Doherty amplifies total method: it amplifies existing two-stage Doherty, adopts temperature compensation decay and linear temperature compensation technology, and is constant with the gain that keeps main power amplifier and peak value power amplifier and linearity cardinal principle when the variations in temperature; Cause main power amplifier and peak value power amplification efficiency not simultaneously when input signal changes, it adopts bias voltage control, makes it keep high efficiency always; When working temperature and input signal strength change and the gain that causes main power amplifier and peak value power amplifier during with phase mismatch, its adopts gain and phase locking technology to make the two maintenance matched well.It is on the basis that two-stage Doherty amplifies, and employing unequal power method realizes the high efficiency amplification under the high peak-to-average force ratio condition of 6-12dB, adopts n Doherty power amplifier power to synthesize and realizes more powerful high efficiency amplification.

The described new total method of adaptive control: its signal cancellation ring and distortion offset ring can adopt manual coarse adjustment, search in tabular form single-chip microcomputer, ARM, FPGA or the DSP microprocessor optimizing control wide region and transfer, the accurate debugging of fast self-locking, with reach at a high speed, the purpose of wide region and fine adjustment, thereby shorten significantly by instability to the stable time; It is when adopting single-chip microcomputer, ARM, FPGA or DSP microprocessor control debugging, adopt mathematics to table look-up or formula is converted to comparatively simple one dimension optimizing algorithm with the two-dimentional optimizing algorithm of complexity in conjunction with the concrete characteristics of vector modulator, the one dimension optimizing algorithm can adopt circulating interpolation method and swing interpolation method.

Total method is controlled in described self-healing: it can be according to detected working temperature ratio, operating current ratio, the forward power intensity rate, the backward power intensity rate, signal cancellation residual signal intensity rate, distortion offsets residual distortion intensity rate and Doherty mismatch ratio, according to normal value excess temperature is set respectively, overcurrent, cross power output, cross backward power, the signal cancellation losing lock, distortion offsets losing lock and coupling offsets the losing lock warning function, when being in alarm condition, can be by microprocessor regulating and controlling parameter, removing reports to the police makes it be in normal operating conditions, thereby realizes the box-like control of self-healing.

Described tricyclic DFFA mobile digital TV and mobile broadband communication power amplifier, it locks amplification detection unit 11 mutually by the DOHERTY width of cloth, the distortion coupling is to pin 1 detecting unit 12, coupling sampling 13, time-delay 14, the distortion coupling is to pin 2 detecting units 15, import controlled amplifying unit 21, coupling shunt 22, close road 23, coupling shunt 24, distortion produces lock detection unit 25,1 detecting unit 26 is amplified in the distortion locking, decay 27, shunt 31, signal is to pin 1 self-locking detecting unit 32, decay 33, shunt 34, time-delay 35, the signal coupling is to pin 1 unit 36, coupling sampling 37, signal detects 38 to

1,2 detecting units 39 are amplified in the distortion locking, pilot tone audio producing modulating unit 41, temperature current detecting unit 42, power supply unit 43, microprocessor unit 51 and Operations Analysis 52 are formed.Its implementation is:

Radiofrequency signal is amplified through importing controlled amplifying unit 21, be input to coupling shunt 22 and be divided into two-way, branch road closes road 23 feed-in pilot signals on it, be divided into two-way through coupling shunt 24, branch road locks amplification detection unit 11 mutually by the DOHERTY width of cloth and amplifies on it, is input to the distortion coupling to pin 1 detecting unit 12; Branch road produces lock detection unit 25 by distortion and produces the 1st distorted signal under it, amplifies 26 amplifications of 1 detecting unit through the distortion locking, is input to the distortion coupling to pin 1 detecting unit 12; Under the control of control signal vector U3 and V3, regulate the width of cloth phase that 1 detecting unit 26 is amplified in the distortion locking, in signal is coupled to pin 1 unit 36, make the distortion coupling take place pin to the two paths of signals of pin 1 detecting unit 12 inputs, the 1st time pin is fallen the DOHERTY width of cloth and lock the distorted signal that amplification detection unit 11 main power amplifiers produce mutually, make the linearity obtain the 1st time and improve; Output distortion simultaneously offset 1 as a result detection signal NCD1 to microprocessor unit 51.The described DOHERTY width of cloth locks amplification detection unit 11 mutually under the control of control signal vector U5 and V5, realize that DOHERTY efficiently mates amplification, produce self-locking control signal U53 and V53 simultaneously, and be entered into Operations Analysis 52, produce matching result detection signal DCD simultaneously, and be entered into microprocessor unit 51; Described distortion produces lock detection unit 25 under the control of control signal vector U2 and V2, the pin signal is obtained the 2nd distorted signal, to microprocessor unit 51, output self-locking control signal U23 and V23 are to Operations Analysis 52 to the signal strength signal intensity SCD2 of pin testing result for output signal simultaneously; Described distortion locking is amplified 1 detecting unit 26 and is also produced self-locking control signal U33 and V33, and is entered into Operations Analysis 52.

Along separate routes the following tributary signals of 22 outputs are through 31 being divided into two-way along separate routes in coupling, and one the tunnel 35 is input to the signal coupling pin 1 unit 36, a tunnel is input to signal to pin 1 self-locking detecting unit 32 through delaying time; The DOHERTY width of cloth locks amplification detection unit 11 output signals mutually to coupling sampling 13, and a part of signal of sampling is input to shunt 34 through attenuator 27 decay; Shunt 34 is told one road signal and is coupled to pin 1 unit 36 to signal, under the control of control signal vector U1 and V1, the adjusting DOHERTY width of cloth locks the width of cloth phase of amplification detection unit 11 mutually, in signal is coupled to pin 1 unit 36, make main signal obtain distorted signal to pin, being input to coupling sampling 37, sample a part of signal to signal to pin 1 detection 38 carry out signal keying really detected, the strength S CD1 of output result signal is to microprocessor unit 51; Along separate routes 34 another road signals of telling 33 are input to signal to pin 1 self-locking detecting unit 32 through decaying, and the two-way input signal of pin 1 self-locking detecting unit 32 is produced self-locking control signal U13 to signal and V13 is input to Operations Analysis 52.

The main signals of coupling sampling 13 outputs 14 are input to the distortion coupling to pin 2 detecting units 15 through delaying time; The main signal of coupling sampling 37 outputs is carried out the distorted signal locking to distortion locking amplification 2 detecting units 39 and is amplified, and is input to the distortion coupling to pin 2 detecting units 15, exports self-locking control signal U43 and V43 simultaneously and is input to Operations Analysis 52; Under the control of control signal vector U4 and V4, regulate the width of cloth phase that 2 detecting units 39 are amplified in the distortion locking, make the distortion coupling two-way input signal be taken place pin to pin 2 detecting units 15, the 2nd time pin is fallen the DOHERTY width of cloth and lock the distorted signal that amplification detection unit 11 main power amplifiers produce mutually, making the linearity obtain the 2nd time improves, export forward power detection signal OPD simultaneously, backward power output signal RPD, distortion offsets 2 detection signal NCD2 as a result.

Pilot tone audio producing modulating unit 41 produces local oscillation signal L01, audio signal A1, audio signal A2, pilot signal DP1 and pilot signal DP2 under the control of little processing control signals CP; Real-time testing temperature of temperature current detecting unit and operating current, and detected working temperature ratio TD and operating current ratio I D be input to microprocessor unit 51.

Described microprocessing unit 51 is accepted actual measurement working temperature ratio TD, operating current ratio I D, input signal power intensity rate IPD, forward power intensity rate OPD, backward power intensity rate RPD, signal is to pin 1 residual signal intensity rate SCD1, signal is to pin 2 residual signal intensity rate SCD2, distortion is to pin 1 residual pilot signal width of cloth phase information ratio NCD1, distortion is amplified the residual ratio DCD of pin pin 2 residual pilot signal width of cloth phase information ratio NCD2 and Doherty coupling, it is with SCD1, SCD2, NCD1, NCD2 and DCD minimum or up to standard be basis for estimation, export the signal of one group of the best to pin 1 little processing vector control signal U12 and V12 by optimizing algorithm successively, signal is to pin 2 little processing vector control signal U22 and V22, distortion is to pin 1 little processing vector control signal U32 and V32, distortion is mated amplification to pin little processing vector control signal U52 and V52 to pin 2 little processing vector control signal U42 and V42 and Doherty, to Operations Analysis 6; It adopts mathematics to table look-up or formula is converted to comparatively simple one dimension optimizing algorithm with the two-dimentional optimizing algorithm of complexity according to the concrete characteristics of vector modulator when adaptive control; Its one dimension optimizing algorithm can adopt circulating interpolation method or swing interpolation method; It also can be provided with look-up table according to input signal power intensity rate IPD and observed temperature ratio TD, accesses U12, V12, U22, V22 U32, V32, U42, the little processing control signals of V42 U52, V52 of one group of the best rapidly; It can be according to detected TD, ID, IPD, OPD, RPD, SCD1, SCD2, NCD1, NCD2 and DCD, excess temperature, overcurrent are set respectively, cross power output, cross backward power and losing lock warning function, when being in these situations respectively, microprocessor unit 51 can be exported control signal IPC, strengthen the degree of decay of step attenuator 10, reduce input power, make it be in normal operating conditions, realize self-healing control to remove to report to the police.

Described Operations Analysis 52 difference acknowledge(ment) signals are to pin 1 manual control signal U11 and V11, little processing vector control signal U12 and V12 and self-locking control signal U13 and V13, signal is to pin 2 manual control signal U21 and V21, little processing vector control signal U22 and V22 and self-locking control signal U23 and V23, distortion is to pin 1 manual control signal U31 and V31, little processing vector control signal U32 and V32 and self-locking control signal U33 and V33, distortion is to pin 2 manual control signal U41 and V41, little processing vector control signal U42 and V42 and self-locking control signal U43 and V43, the Doherty coupling is amplified pin manual control signal U51 and V51, little processing vector control signal U52 and V52 and self-locking control signal U53 and V53, form total auto-adaptive controling signal U1 and V1 through linear computing, U2 and V2, U3 and V3, U4 and V4 and U5 and V5, its relational expression is:

(1), U1=K11U11+K12U12+K13U13+U10 (K11, K12, K13 and U10 are constant)

(2), V1=P11V11+P12V12+P13V13+V10 (P11, P12, P13 and V10 are constant)

(3), U2=K21U21+K22U22+K23U23+U20 (K21, K22, K23 and U20 are constant)

(4), V2=P21V11+P22V22+P23V23+V20 (P21, P22, P23 and V20 are constant)

(5), U3=K31U31+K32U32+K33U33+U30 (K31, K32, K33 and U30 are constant)

(6), V3=P31V31+P32V32+P33V33+V30 (P31, P32, P33 and V30 are constant)

(7), U4=K41U41+K42U42+K43U43+U40 (K41, K42, K43 and U40 are constant)

(8), V4=P41V41+P42V42+P43V43+V40 (P41, P42, P43 and V40 are constant)

(9), U5=K51U51+K52U52+K53U53+U50 (K51, K52, K53 and U50 are constant)

(10), V5=P51V51+P52V52+P53V53+V50 (P51, P52, P53 and V50 are constant)

Each manual control signal is realized the width of cloth phase coarse adjustment to pin control; When input signal strength, variations in temperature and device aging, certain variation will take place in each signal amplitude and phase place to the pin unit, each little processing vector control signal self adaptation conditioning signal amplitude and phase place anti-change, thus keep stable to pin; The control range of each little processing vector control is wide, but needs certain processing time with software processes; Each self-locking auto-adaptive controling signal passes through Operations Analysis 6, self-adapting high-speed conditioning signal amplitude and phase place anti-change, thus keep the stable of signal and distortion to pin; This process all realizes that by hardware control rate is very fast, but control range is little; Like this when input signal strength and variations in temperature are big by little processing adaptive control, change hour by pure hardware and realize at a high speed guaranteeing the high-speed adaptive control in the excursion of broad from lock control.

Described predistortion type DFFA mobile digital TV and mobile broadband communication power amplifier, it locks amplification detection unit 11 mutually by the DOHERTY width of cloth, the distortion coupling is to pin 1 detecting unit 12, coupling sampling 13, time-delay 14, the distortion coupling is to pin 2 detecting units 15, time-delay 16, Vector Modulation 17, close road 18, import controlled amplifying unit 21, coupling shunt 22, close road 23, coupling shunt 24, distortion produces lock detection unit 25, decay 27, shunt 31, signal is to pin 1 self-locking detecting unit 32, decay 33, shunt 34, time-delay 35, the signal coupling is to pin 1 unit 36, coupling sampling 37, signal detects 38 to

1,2 detecting units 39 are amplified in the distortion locking, pilot tone audio producing modulating unit 41, temperature current detecting unit 42, power supply unit 43, microprocessor unit 51 and Operations Analysis 52 are formed.The basically identical of its implementation and described tricyclic DFFA mobile digital TV and mobile broadband communication power amplifier: different just:

Coupling along separate routes one road signals of 24 outputs 16 is input to and closes road 18 through delaying time, the distorted signal that distortion produces lock detection unit 25 generations is input to Vector Modulation 17, the width of cloth of regulating distorted signal by U3 and V3 mutually, be input to and close road 18, close road 18 output pre-distorted signals and lock amplification detection unit 11 mutually to the DOHERTY width of cloth, obtain linearity improvement main power amplification signal.The operation relation formula of its adaptive control is:

(1), U1=K11U11+K12U12+K13U13+U10 (K11, K12, K13 and U10 are constant)

(2), V1=P11V11+P12V12+P13V13+V10 (P11, P12, P13 and V10 are constant)

(3), U2=K21U21+K22U22+K23U23+U20 (K21, K22, K23 and U20 are constant)

(4), V2=P21V11+P22V22+P23V23+V20 (P21, P22, P23 and V20 are constant)

(5), U3=K31U31+K32U32+U30 (K31, K32 and U30 are constant)

(6), V3=P31V31+P32V32+V30 (P31, P32 and V30 are constant)

(7), U4=K41U41+K42U42+K43U43+U40 (K41, K42, K43 and U40 are constant)

(8), V4=P41V41+P42V42+P43V43+V40 (P41, P42, P43 and V40 are constant)

(9), U5=K51U51+K52U52+K53U53+U50 (K51, K52, K53 and U50 are constant)

(10), V5=P51V51+P52V52+P53V53+V50 (P51, P52, P53 and V50 are constant)

It and described tricyclic DFFA mobile digital TV and mobile broadband communication power amplifier contrast its advantage and have been to save the higher distortion locking of cost and amplify 1 detecting unit 26, simple in structure, weak point is that its linearity improvement is slightly little, when predistortion is amplified, lack high speed self-locking control signal in addition.

The controlled amplifying unit of described input, it amplifies 1 unit 212, stepping decay 213, amplitude adjusted 214 and temperature compensation prime by radio-frequency filter 211, prime temperature compensation and amplifies 2 unit 215 and form.Its main effect is to realize the amplification of prime temperature compensation gain stabilization that under the stepping of ALC automatic electric-level control is controlled damply its implementation is as follows:

Radio-frequency input signals is by radio-frequency filter 211 elimination out of band signals, being input to the temperature compensation prime amplifies 1 unit 212 and carries out temperature compensation gain and amplify, under the control of the digital control signal IPC that microprocessor unit 51 produces, carry out numerical control stepping decay by stepping decay 213, with the control of the linear ground ALC signal of power output under, carry out ALC control by amplitude adjusted 214, to keep the stable of whole power amplifier, amplify 2 unit 215 by the temperature compensation prime again and amplify output signal to coupling shunt 22.

The described DOHERTY width of cloth locks the amplification detection unit mutually, it is by Vector Modulation 1111, coupling shunt 1112, time-delay 1113, input power detects 1114, input power detects handles 1115, time-delay decay 1121, temperature compensation

carrier power amplifier

1122,1/4 λ impedance conversion 1123, coupling sampling 1124,3dB bridge shunt 1131, the self-locking of Doherty coupling detects 1132, shunt 1133, the Doherty coupling detects 1134 to pin, shunt 1135, homophase power synthetic 1136, Vector Modulation 1141, temperature compensation peak value power amplifier 1142, coupling sampling 1143 is formed, it mainly realizes the high efficiency amplification of high peak-to-average force ratio signal in coupling Doherty mode, its implementation is as follows:

Carrier signal from coupling shunt 24 is input to Vector Modulation 1111 adjusting width of cloth phases, be divided into two-way through coupling shunt 1112, the input power that is input to auxilliary branch road detects 1114 and carries out the input power detection, export input power detection signal IPD to microprocessing unit 51 on the one hand, after arriving input power detection processing 1115 processing on the other hand, output bias control signal Vg is to temperature compensation carrier power amplifier 1142, because of the regular hour that is formed with of Vg, for realize bias voltage control synchronously, need 1113 to carry out delay process by delaying time.

The signal of time-delay 1113 outputs is through 1131 shunt along separate routes of 3dB bridge, wherein " 0 " degree signal is input to time-delay decay 1121 decay of delaying time, to realize that the width of cloth of branch road is complementary up and down, 1122 pairs of following signals of peak power of temperature compensation carrier power amplifier carry out temperature compensation gain and temperature compensation linear amplification, carry out impedance conversion through 1/4 λ impedance conversion 1123, coupling sampling 1124 output main path signals are to homophase power synthetic 1136; 3dB bridge 1131 " 90 " degree signals that go out along separate routes along separate routes is input to Vector Modulation 1141, under the control of signal U5 and V5, regulate the width of cloth mutually, to realize that the width of cloth of branch road is complementary up and down, 1142 pairs of peak power signals of temperature compensation peak value power amplifier carry out temperature compensation gain and temperature compensation linear amplification, and coupling sampling 1143 main signals are input to homophase power synthetic 1136; Homophase power synthetic 1136 carries out homophase power with two paths of signals and synthesizes; When the power ratio of described temperature compensation carrier power amplifier 1122 and temperature compensation peak value power amplifier 1142 is identical, for constant power Doherty amplifies, its power ratio is not simultaneously, for unequal power Doherty amplifies, when it is 1: 2, can realize that peak-to-average force ratio is the signal high efficiency amplification of 9dB, when it is 1: 3, can realize that peak-to-average force ratio is the signal high efficiency amplification of 12dB.

For the strict width of cloth of realizing temperature compensation carrier power amplifier link and temperature compensation carrier power amplifier link is complementary, guarantee to be input to homophase power synthetic 1136 with two paths of signals constant amplitude homophase, thereby realize the high efficiency amplification, must adopt high-speed adaptive control, its implementation is: two paths of signals respectively through the auxilliary branch road output sampled signal of coupling sampling 1124 and coupling sampling 1143 to along separate routes 1133 and along separate routes 1135, they are divided into two-way separately, be input to Doherty coupling self-locking detection 1132 respectively and pin detected 1134 with the Doherty coupling, the Doherty coupling detects 1134 outputs to pin and mates pin residual signal DCD to microprocessing unit 51, form little processing control signals U52 and V52 and be input to Operations Analysis 52, Doherty coupling self-locking detection 1132 output self-locking control signal U53 and V53 are to Operations Analysis 52, do computing with manual control signal U51 and V51, export total control signal vector U5 and V5 control width of cloth anti-change mutually, thereby realize that the strict width of cloth is complementary.

The described power synthesis type DOHERTY width of cloth locks the amplification detection unit mutually, it by the DOHERTY width of cloth lock mutually amplify prime unit 111, a n DOHERTY width of cloth lock mutually amplify main unit 112, power division 113 is synthesized 114 with power and is formed, its effect is to realize the high efficiency amplification of high peak-to-average force ratio signal under the high-power state, and its implementation is as follows:

Signal from coupling shunt 24 locks 111 amplifications of amplification prime unit mutually and carries out IPD and the Vg detection through the DOHERTY width of cloth; Be divided into the n road by power division 113, every road locks amplification main unit 112 mutually through the DOHERTY width of cloth and carries out the high efficiency amplification, and to carrying out DCDD and U53 and V53 detects in every road, the amplifying signal on every road is input to power synthetic 114, and to carry out power synthetic, the output high-power signal.Power is synthetic, and to require every road DOHERTY width of cloth to lock mutually to amplify main unit 112 to amplify consistent with distribution, and this can be by U5 and V5 realization of regulating every road.

Described distortion produces lock detection unit, it by coupling along separate routes 250, time-delay along separate routes 251, temperature compensation amplifies 252, Vector Modulation 253, along separate routes 254, distortion produces that self-locking detects 255, coupling is formed with lock-in detection 258 pin 256, coupling sampling 257, its main effect is to produce stable distorted signal, and its implementation is as follows:

From coupling along separate routes 24 signal 250 be divided into two-way along separate routes through coupling, it on branch road through time-delay shunt 251, be input to the end of coupling to pin 256; Branch road amplifies 252 through temperature compensation and carries out temperature compensation and amplify on it, is input to Vector Modulation 253, regulates the width of cloth mutually under the control of control signal U2 and V2, is input to the other end of coupling to pin 256 through shunt 254; Two paths of signals falls carrier signal to pin in being coupled to pin 256, stay distorted signal, be input in the coupling sampling 257, main road output distortion signal is to distortion locking amplification detection Unit 1, sampled signal is input to lock-in detection 258, detects the residual carrier signal SCD2 of pin to microprocessing unit 51; Another road signal of time-delay shunt 251 and shunt 254 is input to the distortion generation and detects in 256, detects self-locking control signal U23 and V23 and arrives operation processing unit 52.

1 detecting unit is amplified in described distortion locking, it by coupling along separate routes 261, Vector Modulation 262, temperature compensation distortion power amplify 263, coupling sampling 264, time-delay 265, distortion are amplified self-locking and detected 266 and decay and 267 form, its main effect is that distorted signal is stablized amplification, and its implementation is as follows:

The distorted signal that produces lock detection unit 25 from distortion is divided into two-way through coupling shunt 261, tributary signal is input to Vector Modulation 262 on it, under the control of control signal U3 and V3, regulate the width of cloth mutually, amplify 263 through the temperature compensation distortion power and carry out power amplification, through coupling sampling 264 output main signals to the distortion coupling to pin 1 detecting unit, sampled signal 267 is input to distortion and amplifies self-locking and detect 266 through decaying; Tributary signal 265 is input to distortion and amplifies self-locking and detect 266 through delaying time on it; Distortion is amplified self-locking detection 266 and is arrived operation processing unit 52 according to two-way input signal generation self-locking control signal U33 and V33.

For realizing high score all than the efficient amplification of signal, described distortion is amplified self-locking detection 266 and also can be adopted Doherty to amplify; The composition that 2 detecting units are amplified in described distortion locking amplifies the consistent of 1 detecting unit with implementation method and described distortion locking.

Described signal is to pin 1 self-locking detecting unit, and it is made up of IQ demodulation 321, the accurate amplifier 322 of two-way, low-pass filtering 323, low-pass filtering 325, amplitude-phase amplifier computing 324, and its main effect is to produce the self-locking control signal, and its implementation is as follows:

From along separate routes 31 with the signal that comes self damping 33, demodulate the width of cloth facial difference IQ vector signal UI and the UQ of two paths of signals by IQ demodulation 321, export through low-pass filtering respectively U13With V13When vector modulator is the IQ modulator, U13With V13Direct corresponding self-locking control signal U13 and V13; When vector modulator is width of cloth phase modulation, do computing, U13=by amplitude-phase amplifier computing 324 U13With V13Root mean square, V13 is the phase control amount, when phase change hour, V13= V13/U13;When vector modulator is reflection type modulator, must incite somebody to action by lookup table mode U13With V13Be converted into U13 and V13.

The composition of described other self-locking detecting unit and produce the method for self-locking control signal U23 and V23, U33 and V33, U43 and V43 and U53 and V53 and described signal consistent to pin 1 self-locking detecting unit.

Described pilot tone audio producing modulating unit, in order better to realize the extraction of self-locking control signal and the detection of residual distortion signal, the mode of two audio signals with the IQ modulation is modulated on the pilot signal, thereby increased the outer interference performance of the anti-band that extracts self-locking control signal and residual distortion signal.Described pilot tone take place frequently living modulation module its form with implementation method and be:

Its produces the pilot signal be used for the analog distortion signal, two audio signals and two audio signal IQ formulas is modulated at pilot signal, and it is made up of frequency synthesizer 411, IQ modulator 412, IQ modulator 413, biasing I414, single audio frequency generator 416, biasing Q415 and single audio frequency generator 417.Frequency synthesizer 411 produces a signal L01 approaching with the distorted signal frequency under the control of little processing control signals CP, be input to IQ modulator 412, also exports one tunnel mixed frequency signal the same with L01 simultaneously; IQ modulator 412 carries out the IQ modulation to L01 under the effect of biasing I 414 and biasing Q415, output signal DP1 is to IQ modulator 413; IQ modulator 4133 carries out the IQ modulation to L02 under the effect of 2 liang of signals of audio frequency that the audio frequency 1 and the single-tone generator 417 of 416 outputs of single-tone generator are exported, the pilot signal DP2 of double-tone IQ modulation has frequently been carried out in output.Little processing control signals CP is mainly used in the frequency that changes pilot tone.

Described distortion coupling is to pin 2 detecting units, and it is detected 157 to pin detection 156, forward power and formed by coupling canceller 151, bidirectional coupler 152, isolator 153, backward power detection 154, along separate routes 155, distortion.It realizes that mainly the 2nd distortion detects pin, residual distortion input, forward power and backward power detects, and its implementation is as follows:

Be input in the coupling canceller 151 from the main power amplifier signal of time-delay 14 outputs and from distortion locking amplification 2 detecting units 39, at this further to the pin distorted signal, the result is input to bidirectional coupler 152, the power signal that its main signal has been amplified by isolator 153 output high efficiency superlinearity; The reverse coupled branch road of bidirectional coupler outputs to backward power and detects 154, detects backward power signal RPD; Its forward coupling branch road outputs to shunt 155, tell one the road to forward power detection 157, detect forward power signal OPD, tell another road OP and pin is detected 156 to distortion, the residual distortion signal is detected, also can form the distortion coupling pin 2 self-locking auto-adaptive controling signals.Described distortion detects 156 to pin and is made up of and implementation method for two kinds multiplication type and IQ Demodulation Type.

Described multiplication type distortion coupling is to the pin detecting unit, and it is made up of filtering 1561, mixing and filtering 1562, multiplication filtering 1563, multiplication filtering 1564, computing 1565, arithmetic unit 1566 and root mean square 1567 is formed.It realizes that mainly residual distortion input and distortion are coupled to the formation of pin 2 self-locking auto-adaptive controling signals, and its implementation is as follows:

Forward power coupled signal OP is input to filtering 1561, and filtering obtains residual pilot signal, and the size of this signal is represented the size of residual distortion signal; The time-delay pilot tone be input to mixing and filtering 1562 through filtered OP signal, output intermediate-freuqncy signal; Be input to multiplication filtering 1563 and multiplication filtering 1564 along separate routes, be input to computing 1565 more respectively, reach arithmetic unit 1566, obtain U43With V43Signal, when U43With V43When very little, U43With V43Directly represent distortion coupling to pin 2 detecting units detect from lock signal U43 and V43, when big by the two is carried out the root mean square computing to residual distortion signal NCD2.

Because residual pilot signal and main power signal frequency difference are very near, conventional method is difficult to extract the intensity of residual pilot signal, and this method has been carried out the very near mixing low pass filtered of frequency difference and involved the very near multiplication filtering of frequency difference, is extracting U43With V43Time has very strong clutter and suppresses ability, well solved the difficult problem that conventional feed forward is amplified residual pilot detection by the root mean square computing.Described distortion coupling also can adopt composition and the implementation method of described multiplication type distortion coupling to the pin detecting unit to pin 1 detecting unit.

Described IQ Demodulation Type distortion coupling is to the pin detecting unit, it is made up of pilot filter 1560, mixing intermediate frequency filtering 1561, IQ demodulation 1562, the accurate arithmetic unit 1563 of two-way, low-pass filtering 1564, low-pass filtering 1565, root mean square computing 1566, local oscillator 1567, mixing intermediate frequency filtering 1568 and time-delay pilot tone local oscillator 1569, it realizes that mainly residual distortion input and distortion coupling form pin 2 self-locking auto-adaptive controling signals, and its implementation is as follows:

Residual pilot signal analogue residue distorted signal, forward power coupled signal OP is input to pilot filter 1560, extract residual pilot signal and deliver to mixing intermediate-frequency filter 1561, do mixing intermediate frequency falls into local oscillation signal 1567, be input to IQ demodulator 1562 and make input signal, adopt intermediate frequency filtering to strengthen the ability of elimination high frequency noise signal; Time-delay pilot tone local oscillator 1569 down-converts to intermediate frequency with local oscillation signal 1567 by mixing intermediate-frequency filter 1568, is input to IQ demodulator 1562 and makes local oscillator; IQ demodulator 1562 has demodulated the width of cloth phase signals UI and the UQ of residual pilot signal, and this signal is generally very little, carries out computing by the accurate arithmetic unit of two-way and amplifies, and each road is exported pure width of cloth phase signals respectively through low-pass filtering elimination high fdrequency component U43With V43, be sent to root mean square computing 1566 carry out the root mean square computing obtain residual pilot signal strength ratio column signal NCD2=√ [( U43) ²+ ( V43) ²], owing to adopted with the input intermediate-freuqncy signal and done the IQ demodulation with intermediate frequency local oscillator signal frequently, demodulated output signal UI and UQ are the signal of direct current character, they and high-frequency signal frequency difference are far, be easy to method elimination by low-pass filtering and be mixed in high fdrequency component among UI and the UQ, obtain pure width of cloth phase signals U43With V43Thereby, detect the intensity rate signal NCD2 of residual pilot signal, solved a difficult problem that detects the residual distortion signal in the existing feedforward linear power amplifier. U43With V43Also can be used as the distortion coupling to pin 2 self-locking auto-adaptive controling signals.Described distortion coupling also can adopt composition and the implementation method of described multiplication type distortion coupling to the pin detecting unit to pin 1 detecting unit.

Described software main-process stream and software look-up table is characterized in that: total software flow is regulated part 1, Doherty match and regulate part 2 and FFA self adaptation adjusting 3 by self-healing and is formed.

Part 1 is regulated in described self-healing, it sets up the workflow of a continuous cycle detection Control work state, it is provided with overcurrent, mistake power output, excess temperature respectively, crosses backward power and losing lock warning function, when high efficiency superlinearity DFFA power amplifier is in these situations respectively, microprocessor unit 51 can be exported control signal IPC, strengthen the degree of decay of step attenuator 213, reduce input power, make it be in normal operating conditions to remove to report to the police; When input power was reduced to a certain degree, described high efficiency superlinearity DFFA power amplifier can't satisfy instructions for use, and then underpower is reported to the police and stopped shutdown, and that be provided with here is decline 6dB, can be provided with flexibly as required in the reality.

The described Doherty match and regulate part 2 main width of cloth of regulating peak value power amplifier link and carrier power amplifier link are complementary, make it under different input powers and operational temperature conditions, to be in good matching status, as shown be the parallel Doherty self-adapted high-efficient of level Four displaced type or level Four rate mesh power amplifier software flow pattern, call U52 and V52 in the look-up table successively, when coupling difference DCD is up to standard, directly use the parameter in the look-up table, its program runtime is very short, so just can realize quick little processing adaptive control; The generation of look-up table is stored after by the optimizing algorithm optimizing and is obtained; In the reality, because device is aging, best U52 in the former look-up table and V52 can be different, at this moment still need optimizing algorithm to seek best U52 and the V52 and the look-up table that upgrades in time of this moment.Other various types of Doherty self-adapted high-efficient rate mesh power amplifier software flows can be derived according to this.

Described FFA self adaptation regulates that part 3 is main regulates each signal to pin amplifying unit and distortion amplification to the width of cloth of pin unit mutually, make it under different input powers and operational temperature conditions, to be in good to the pin state, as Fig. 1 is tricyclic high efficiency superlinearity DFFA power amplifier software flow pattern, call the U12 in the look-up table successively, V12, U22, V22, U32, V32, U42 and V42, when each to keying fruit detected value NCD2, NCD1, when SCD2 and SCD1 are up to standard, directly use the parameter in the look-up table, its program runtime is very short, so just can realize quick little processing adaptive control; The generation of look-up table is stored after by the optimizing algorithm optimizing and is obtained; In the reality, because device is aging, best U12, V12, U22, V22, U32, V32, U42 and V42 in the former look-up table can be different, at this moment still need optimizing algorithm to seek best U12, V12, U22, V22, U32, V32, U42 and V42 and the look-up table that upgrades in time of this moment.Described predistortion type high efficiency superlinearity DFFA power amplifier software flow can be derived according to this.

It is when adopting optimizing algorithm, characteristics according to vector modulator, utilize formula or mathematics to table look-up complicated two-dimentional optimizing is reduced to the optimizing of simple interpolation method one dimension, because although two-way is to its amplitude difference of pin signal, as long as when phase matched is good more, it is just good more to the pin degree, so during two one dimension optimizing, elder generation's optimizing optimum phase control signal [Vxy], optimizing optimum range control signal [Uxy] is utilized formula or mathematics to table look-up [Uxy] is converted into corresponding Uxy and Vxy with [Vxy] again.

Described software interpolation method flow process, its implementation is: adopt the fastest speed according to dependent variable minimum or the independent variable that searches out the best up to standard, it has two types of software cycles formula interpolation method and the swing interpolation methods of software, it is according to the difference of vector modulator, when the two-dimentional optimizing of complexity was converted into two simple one dimension interpolation method optimizing, its parameter will be carried out different conversions.

When vector modulator adopts width of cloth facies pattern to regulate, X represents amplitude control signal U12, U22, U32, U42 and phase control signal V12, V22, V32, among the V42 one, Z represents SCD1, SCD2, NCD1, NCD2, among the DCD one, because although two-way is to its amplitude difference of pin signal, but as long as phase matched is when good more, it is just good more to the pin degree, phase modulation position control signal V12 of elder generation when so interpolation method is regulated, V22, V32, among the V42 one, the U12 of modulation control signal again, U22, U32, among the U42 corresponding one, so just the two-dimentional optimizing of complexity is reduced to the optimizing of two simple interpolation method one dimensions, what this implementation method was listed is the step-length halving method, also can use step-length to add the en method; This implementation method has only been listed forward optimizing adjusting, in the time of realizing that forward and reverse optimizing is regulated, can realize that the 0-1 scope in this implementation method as subtract 1/2 by amplifier is-the 1/1--+1/2 variation by the subtraction amplifier; The optimizing scope also can be taken advantage of a coefficient to enlarge or dwindles by amplifier; When this implementation method had only been listed the optimizing scope and is 0-1, the optimizing precision was 1/16, and described software interpolation method flow chart also can extend downwards according to described rule, to 1/32 or 1/2 ⁿ(n 〉=6).

When vector modulator adopts the IQ type to regulate, adopt formula operation, the two-dimentional optimizing algorithm of complexity is converted into simple one dimension interpolation method, it slightly regulates complicated than described width of cloth facies pattern, it to pass through power little, but control range is wide and control precision is high; When vector modulator adopts reflection-type to regulate, adopt and table look-up, the two-dimentional optimizing algorithm of complexity is converted into simple one dimension interpolation method, it regulate than described width of cloth facies pattern and the IQ type regulate complicated, but it pass through that power is big, control range is wide and control precision is high.

Described software cycles formula interpolation method adopts the Do statement structure, and its required memory span is little but optimizing speed is slow.

The swing interpolation method of described software adopts the turnover sentence structure, and its required memory span is big but optimizing speed is fast.

Description of drawings:

Fig. 1 is tricyclic DFFA mobile digital TV of the present invention and mobile broadband communication power amplifier theory diagram

Fig. 2 is predistortion type DFFA mobile digital TV of the present invention and mobile broadband communication power amplifier theory diagram

Fig. 3 is the controlled amplifying unit theory diagram of input of the present invention

Fig. 4 locks amplification detection unit theory diagram mutually for the DOHERTY width of cloth of the present invention

Fig. 5 locks amplification detection unit theory diagram mutually for the power synthesis type DOHERTY width of cloth of the present invention

Fig. 6 is that distortion of the present invention produces the lock detection unit theory diagram

Fig. 7 is a distortion locking amplification detection of the present invention unit theory diagram

Fig. 8 is that signal of the present invention is to pin self-locking detecting unit theory diagram

Fig. 9 is a pilot tone audio producing modulation principle block diagram of the present invention

Figure 10 is that distortion coupling of the present invention is to pin detecting unit theory diagram

Figure 11 A is that multiplication type distortion coupling of the present invention is to pin detecting unit theory diagram

Figure 11 B is that IQ Demodulation Type distortion coupling of the present invention is to pin detecting unit theory diagram

Figure 12 is a software general flow chart of the present invention

Figure 13 is software look-up table figure of the present invention

Figure 14 is a software interpolation method flow chart of the present invention

Embodiment:

Be illustrated in figure 1 as tricyclic DFFA mobile digital TV of the present invention and mobile broadband communication power amplifier theory diagram

It locks amplification detection unit 11 mutually by the DOHERTY width of cloth, the distortion coupling is to pin 1 detecting unit 12, coupling sampling 13, time-delay 14, the distortion coupling is to pin 2 detecting units 15, import controlled amplifying unit 21, coupling shunt 22, close road 23, coupling shunt 24, distortion produces lock detection unit 25,1 detecting unit 26 is amplified in the distortion locking, decay 27, shunt 31, signal is to pin 1 self-locking detecting unit 32, decay 33, shunt 34, time-delay 35, the signal coupling is to pin 1 unit 36, coupling sampling 37, signal detects 38 to pin 1,2 detecting units 39 are amplified in the distortion locking, pilot tone audio producing modulating unit 41, temperature current detecting unit 42, power supply unit 43, microprocessor unit 51 and Operations Analysis 52 are formed.Its implementation is:

(1), U1=K11U11+K12U12+K13U13+U10 (K11, K12, K13 and U10 are constant)

(2), V1=P11V11+P12V12+P13V13+V10 (P11, P12, P13 and V10 are constant)

(3), U2=K21U21+K22U22+K23U23+U20 (K21, K22, K23 and U20 are constant)

(4), V2=P21V11+P22V22+P23V23+V20 (P21, P22, P23 and V20 are constant)

(5), U3=K31U31+K32U32+K33U33+U30 (K31, K32, K33 and U30 are constant)

(6), V3=P31V31+P32V32+P33V33+V30 (P31, P32, P33 and V30 are constant)

(7), U4=K41U41+K42U42+K43U43+U40 (K41, K42, K43 and U40 are constant)

(8), V4=P41V41+P42V42+P43V43+V40 (P41, P42, P43 and V40 are constant)

(9), U5=K51U51+K52U52+K53U53+U50 (K51, K52, K53 and U50 are constant)

(10), V5=P51V51+P52V52+P53V53+V50 (P51, P52, P53 and V50 are constant)

Be illustrated in figure 2 as predistortion type DFFA mobile digital TV of the present invention and mobile broadband communication power amplifier theory diagram

It locks amplification detection unit 11 mutually by the DOHERTY width of cloth, the distortion coupling is to pin 1 detecting unit 12, coupling sampling 13, time-delay 14, the distortion coupling is to pin 2 detecting units 15, time-delay 16, Vector Modulation 17, close road 18, import controlled amplifying unit 21, coupling shunt 22, close road 23, coupling shunt 24, distortion produces lock detection unit 25, decay 27, shunt 31, signal is to pin 1 self-locking detecting unit 32, decay 33, shunt 34, time-delay 35, the signal coupling is to pin 1 unit 36, coupling sampling 37, signal detects 38 to pin 1,2 detecting units 39 are amplified in the distortion locking, pilot tone audio producing modulating unit 41, temperature current detecting unit 42, power supply unit 43, microprocessor unit 51 and Operations Analysis 52 are formed.The basically identical of its implementation and described tricyclic DFFA mobile digital TV and mobile broadband communication power amplifier: different just:

(1), U1=K11U11+K12U12+K13U13+U10 (K11, K12, K13 and U10 are constant)

(2), V1=P11V11+P12V12+P13V13+V10 (P11, P12, P13 and V10 are constant)

(3), U2=K21U21+K22U22+K23U23+U20 (K21, K22, K23 and U20 are constant)

(4), V2=P21V11+P22V22+P23V23+V20 (P21, P22, P23 and V20 are constant)

(5), U3=K31U31+K32U32+U30 (K31, K32 and U30 are constant)

(6), V3=P31V31+P32V32+V30 (P31, P32 and V30 are constant)

(7), U4=K41U41+K42U42+K43U43+U40 (K41, K42, K43 and U40 are constant)

(8), V4=P41V41+P42V42+P43V43+V40 (P41, P42, P43 and V40 are constant)

(9), U5=K51U51+K52U52+K53U53+U50 (K51, K52, K53 and U50 are constant)

(10), V5=P51V51+P52V52+P53V53+V50 (P51, P52, P53 and V50 are constant)

Be illustrated in figure 3 as the controlled amplifying unit theory diagram of input of the present invention

It amplifies 1 unit 212, stepping decay 213, amplitude adjusted 214 and temperature compensation prime by radio-frequency filter 211, prime temperature compensation and amplifies 2 unit 215 and form.Its main effect is to realize the amplification of prime temperature compensation gain stabilization that under the stepping of ALC automatic electric-level control is controlled damply its implementation is as follows:

Be illustrated in figure 4 as the DOHERTY width of cloth of the present invention and lock amplification detection unit theory diagram mutually

It is by Vector Modulation 1111, coupling shunt 1112, time-delay 1113, input power detects 1114, input power detects handles 1115, time-delay decay 1121, temperature compensation

carrier power amplifier

Be illustrated in figure 5 as the power synthesis type DOHERTY width of cloth of the present invention and lock amplification detection unit theory diagram mutually

It by the DOHERTY width of cloth lock mutually amplify prime unit 111, a n DOHERTY width of cloth lock mutually amplify main unit 112, power division 113 is synthesized 114 with power and is formed, its effect is to realize the high efficiency amplification of high peak-to-average force ratio signal under the high-power state, and its implementation is as follows:

Be illustrated in figure 6 as distortion of the present invention and produce the lock detection unit theory diagram

It by coupling along separate routes 250, time-delay along separate routes 251, temperature compensation amplifies 252, Vector Modulation 253, along separate routes 254, distortion produces that self-locking detects 255, coupling is formed with lock-in detection 258 pin 256, coupling sampling 257, its main effect is to produce stable distorted signal, and its implementation is as follows:

Be illustrated in figure 7 as distortion locking of the present invention and amplify 1 detecting unit theory diagram

It by coupling along separate routes 261, Vector Modulation 262, temperature compensation distortion power amplify 263, coupling sampling 264, time-delay 265, distortion are amplified self-locking and detected 266 and decay and 267 form, its main effect is that distorted signal is stablized amplification, its implementation is as follows:

Be illustrated in figure 8 as signal of the present invention to pin 1 self-locking detecting unit theory diagram

It is made up of IQ demodulation 321, the accurate amplifier 322 of two-way, low-pass filtering 323, low-pass filtering 325, amplitude-phase amplifier computing 324, and its main effect is to produce the self-locking control signal, and its implementation is as follows:

Be illustrated in figure 9 as pilot tone audio producing modulating unit theory diagram of the present invention

In order better to realize the extraction of self-locking control signal and the detection of residual distortion signal, the mode of two audio signals with the IQ modulation is modulated on the pilot signal, thereby increased the outer interference performance of the anti-band that extracts self-locking control signal and residual distortion signal.Described pilot tone take place frequently living modulation module its form with implementation method and be:

Be that distortion coupling of the present invention is to pin 2 detecting unit theory diagrams as shown in figure 10

It is detected 157 to pin detection 156, forward power and is formed by coupling canceller 151, bidirectional coupler 152, isolator 153, backward power detection 154, along separate routes 155, distortion.It realizes that mainly the 2nd distortion detects pin, residual distortion input, forward power and backward power detects, and its implementation is as follows:

It is made up of filtering 1561, mixing and filtering 1562, multiplication filtering 1563, multiplication filtering 1564, computing 1565, arithmetic unit 1566 and root mean square 1567 is formed.It realizes that mainly residual distortion input and distortion are coupled to the formation of pin 2 self-locking auto-adaptive controling signals, and its implementation is as follows:

It is made up of pilot filter 1560, mixing intermediate frequency filtering 1561, IQ demodulation 1562, the accurate arithmetic unit 1563 of two-way, low-pass filtering 1564, low-pass filtering 1565, root mean square computing 1566, local oscillator 1567, mixing intermediate frequency filtering 1568 and time-delay pilot tone local oscillator 1569, it realizes that mainly residual distortion input and distortion coupling form pin 2 self-locking auto-adaptive controling signals, and its implementation is as follows:

As Figure 12 be respectively software general flow chart of the present invention and software look-up table figure as shown in figure 13

Total software flow is regulated part 1, Doherty match and regulate part 2 and FFA self adaptation adjusting 3 by self-healing and is formed.

Be software interpolation method flow chart of the present invention as shown in figure 14

Its implementation is: adopt the fastest speed according to dependent variable minimum or the independent variable that searches out the best up to standard, it has two types of software cycles formula interpolation method and the swing interpolation methods of software, it is according to the difference of vector modulator, when the two-dimentional optimizing of complexity was converted into two simple one dimension interpolation method optimizing, its parameter will be carried out different conversions.

Explanation at last: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention has been described in detail with reference to the foregoing description, but still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of spirit and scope of the invention, it all should be comprised in the claim scope of the present invention.

Claims

1, the mobile digital TV and the wide-band mobile communication power amplifier of a kind of high efficiency, superlinearity, high-speed adaptive and self-healing control, it is characterized in that adopting new FFA feedforward to amplify, new Doherty amplifies, new self adaptation and self-healing control method and with its combination, it is used for mobile digital TV transmitter and relay station and the various mobile broadband communications base station and the relay station of various patterns, also can be used for GSM multicarrier and trunking mobile communication base station, base station and directly puts relay station.

Total method is amplified in described new FFA feedforward: it adopts high the isolation pin technology and vector modulator mode, realize that high accuracy is to pin, improve signal to pin and distortion to pin to the pin degree, thereby reach the power that reduces the error power amplifier, the effect that improves the high linearity of the linearity and broadband; It is realizing that signal during to pin, when causing the pin mismatch because of input power, working temperature and device aging, can come from the lock control signal with the method self check of pure hardware to pin or distortion, realizes that signal controls the high speed stable equilibrium of pin is accurate pin and distortion.It adopts pilot signal analog distortion signal, for better realize self-locking control signal and residual distortion signal extraction, it can be modulated at the mode of two audio signals with the IQ modulation on the pilot signal, thereby has increased the outer interference performance of anti-band when extracting self-locking control signal and residual distortion signal; It during to pin, adopts multiplication type or the distortion of IQ Demodulation Type coupling that pin is detected in distortion, solves the residual pilot detection difficult problem of existing feedforward adapter power amplifier; It has two types of tricyclic and predistortion type DFFA mobile digital TV and mobile broadband communication power amplifiers, can improve the linearity and improve the power of main power amplifier.

The described new total method of adaptive control: its signal can adopt manual coarse adjustment to lock ring and distortion to lock ring, search in tabular form single-chip microcomputer, ARM, FPGA or the DSP microprocessor optimizing control wide region and transfer, the accurate debugging of fast self-locking, with reach at a high speed, the purpose of wide region and fine adjustment, thereby shorten significantly by instability to the stable time; It is when adopting single-chip microcomputer, ARM, FPGA or DSP microprocessor control debugging, adopt mathematics to table look-up or formula is converted to comparatively simple one dimension optimizing algorithm with the two-dimentional optimizing algorithm of complexity in conjunction with the concrete characteristics of vector modulator, the one dimension optimizing algorithm can adopt circulating interpolation method and swing interpolation method.

Total method is controlled in described self-healing: it can be according to detected working temperature ratio, operating current ratio, the forward power intensity rate, the backward power intensity rate, signal is to pin residual signal intensity rate, distortion is to pin residual distortion intensity rate and Doherty mismatch ratio, according to normal value excess temperature is set respectively, overcurrent, cross power output, cross backward power, signal is to the pin losing lock, distortion to the pin losing lock and the coupling to pin losing lock warning function, when being in alarm condition, can be by microprocessor regulating and controlling parameter, removing reports to the police makes it be in normal operating conditions, thereby realizes the box-like control of self-healing.

2, according to claim 1, described DFFA mobile digital TV and mobile broadband communication power amplifier is characterized in that:

It is made up of and implementation method for two kinds tricyclic and predistortion type DFFA mobile digital TV and mobile broadband communication power amplifier.

Described tricyclic DFFA mobile digital TV and mobile broadband communication power amplifier is characterized in that:

Radiofrequency signal is amplified through importing controlled amplifying unit 21, be input to coupling shunt 22 and be divided into two-way, branch road closes road 23 feed-in pilot signals on it, be divided into two-way through coupling shunt 24, branch road locks amplification detection unit 11 mutually by the DOHERTY width of cloth and amplifies on it, is input to the distortion coupling to pin 1 detecting unit 12; Branch road produces lock detection unit 25 by distortion and produces the 1st distorted signal under it, amplifies 26 amplifications of 1 detecting unit through the distortion locking, is input to the distortion coupling to pin 1 detecting unit 12; Under the control of control signal vector U3 and V3, regulate the width of cloth phase that 1 detecting unit 26 is amplified in the distortion locking, in signal is coupled to pin 1 unit 36, make the distortion coupling take place pin to the two paths of signals of pin 1 detecting unit 12 inputs, the 1st time pin is fallen the DOHERTY width of cloth and lock the distorted signal that amplification detection unit 11 main power amplifiers produce mutually, make the linearity obtain the 1st time and improve; Output distortion simultaneously to pin 1 as a result detection signal NCD1 to microprocessor unit 51.The described DOHERTY width of cloth locks amplification detection unit 11 mutually under the control of control signal vector U5 and V5, realize that DOHERTY efficiently mates amplification, produce self-locking control signal U53 and V53 simultaneously, and be entered into Operations Analysis 52, produce matching result detection signal DCD simultaneously, and be entered into microprocessor unit 51; Described distortion produces lock detection unit 25 under the control of control signal vector U2 and V2, the pin signal is obtained the 2nd distorted signal, to microprocessor unit 51, output self-locking control signal U23 and V23 are to Operations Analysis 52 to the signal strength signal intensity SCD2 of pin testing result for output signal simultaneously; Described distortion locking is amplified 1 detecting unit 26 and is also produced self-locking control signal U33 and V33, and is entered into Operations Analysis 52.

The main signals of coupling sampling 13 outputs 14 are input to the distortion coupling to pin 2 detecting units 15 through delaying time; The main signal of coupling sampling 37 outputs is carried out the distorted signal locking to distortion locking amplification 2 detecting units 39 and is amplified, and is input to the distortion coupling to pin 2 detecting units 15, exports self-locking control signal U43 and V43 simultaneously and is input to Operations Analysis 52; Under the control of control signal vector U4 and V4, regulate the width of cloth phase that 2 detecting units 39 are amplified in the distortion locking, make the distortion coupling two-way input signal be taken place pin to pin 2 detecting units 15, the 2nd time pin is fallen the DOHERTY width of cloth and lock the distorted signal that amplification detection unit 11 main power amplifiers produce mutually, making the linearity obtain the 2nd time improves, export forward power detection signal OPD simultaneously, backward power output signal RPD, distortion is to pin 2 detection signal NCD2 as a result.

Described microprocessing unit 51 is accepted actual measurement working temperature ratio TD, operating current ratio I D, input signal power intensity rate IPD, forward power intensity rate OPD, backward power intensity rate RPD, signal is to pin 1 residual signal intensity rate SCD1, signal is to pin 2 residual signal intensity rate SCD2, distortion is to pin 1 residual pilot signal width of cloth phase information ratio NCD1, distortion is amplified the residual ratio DCD of pin pin 2 residual pilot signal width of cloth phase information ratio NCD2 and Doherty coupling, it is with SCD1, SCD2, NCD1, NCD2 and DCD minimum or up to standard be basis for estimation, export the signal of one group of the best to pin 1 little processing vector control signal U12 and V12 by optimizing algorithm successively, signal is to pin 2 little processing vector control signal U22 and V22, distortion is to pin 1 little processing vector control signal U32 and V32, distortion is mated amplification to pin little processing vector control signal U52 and V52 to pin 2 little processing vector control signal U42 and V42 and Doherty, to Operations Analysis 6; It adopts mathematics to table look-up or formula is converted to comparatively simple one dimension optimizing algorithm with the two-dimentional optimizing algorithm of complexity according to the concrete characteristics of vector modulator when adaptive control; Its one dimension optimizing algorithm can adopt circulating interpolation method or swing interpolation method; It also can be provided with look-up table according to input signal power intensity rate IPD and observed temperature ratio TD, accesses the little processing control signals of U12, V12, U22, V22U32, V32, U42, V42U52, V52 of one group of the best rapidly; It can be according to detected TD, ID, IPD, OPD, RPD, SCD1, SCD2, NCD1, NCD2 and DCD, excess temperature, overcurrent are set respectively, cross power output, cross backward power and losing lock warning function, when being in these situations respectively, microprocessor unit 51 can be exported control signal IPC, strengthen the degree of decay of step attenuator 10, reduce input power, make it be in normal operating conditions, realize self-healing control to remove to report to the police.

(1), U1=K11U11+K12U12+K13U13+U10 (K11, K12, K13 and U10 are constant)

(2), V1=P11V11+P12V12+P13V13+V10 (P11, P12, P13 and V10 are constant)

(3), U2=K21U21+K22U22+K23U23+U20 (K21, K22, K23 and U20 are constant)

(4), V2=P21V11+P22V22+P23V23+V20 (P21, P22, P23 and V20 are constant)

(5), U3=K31U31+K32U32+K33U33+U30 (K31, K32, K33 and U30 are constant)

(6), V3=P31V31+P32V32+P33V33+V30 (P31, P32, P33 and V30 are constant)

(7), U4=K41U41+K42U42+K43U43+U40 (K41, K42, K43 and U40 are constant)

(8), V4=P41V41+P42V42P43V43+V40 (P41, P42, P43 and V40 are constant)

(9), U5=K51U51+K52U52+K53U53+U50 (K51, K52, K53 and U50 are constant)

(10), V5=P51V51+P52V52+P53V53+V50 (P51, P52, P53 and V50 are constant)

Described predistortion type DFFA mobile digital TV and mobile broadband communication power amplifier is characterized in that:

(1), U1=K11U11+K12U12+K13U13+U10 (K11, K12, K13 and U10 are constant)

(2), V1=P11V11+P12V12+P13V13+V10 (P11, P12, P13 and V10 are constant)

(3), U2=K21U21+K22U22+K23U23+U20 (K21, K22, K23 and U20 are constant)

(4), V2=P21V11+P22V22+P23V23+V20 (P21, P22, P23 and V20 are constant)

(5), U3=K31U31+K32U32+U30 (K31, K32 and U30 are constant)

(6), V3=P31V31+P32V32+V30 (P31, P32 and V30 are constant)

(7), U4=K41U41+K42U42+K43U43+U40 (K41, K42, K43 and U40 are constant)

(8), V4=P41V41+P42V42+P43V43+V40 (P41, P42, P43 and V40 are constant)

(9), U5=K51U51+K52U52+K53U53+U50 (K51, K52, K53 and U50 are constant)

(10), V5=P51V51+P52V52+P53V53+V50 (P51, P52, P53 and V50 are constant)

3, according to claim 2, the controlled amplifying unit of described input is characterized in that:

4, according to claim 2, the described DOHERTY width of cloth locks the amplification detection unit mutually, it is characterized in that:

It locks the amplification detection unit mutually by the basic model and the power synthesis type width of cloth and forms and implementation method for two kinds.

The described basic model DOHERTY width of cloth locks the amplification detection unit mutually, it is characterized in that:

It is by Vector Modulation 1111, coupling shunt 1112, time-delay 1113, input power detects 1114, input power detects handles 1115, time-delay decay 1121, temperature compensation carrier power amplifier 1122,1/4 λ impedance conversion 1123, coupling sampling 1124,3dB bridge shunt 1131, the self-locking of Doherty coupling detects 1132, shunt 1133, the Doherty coupling detects 1134 to pin, shunt 1135, homophase power synthetic 1136, Vector Modulation 1141, temperature compensation peak value power amplifier 1142, coupling sampling 1143 is formed, it mainly realizes the high efficiency amplification of high peak-to-average force ratio signal in coupling Doherty mode, its implementation is as follows:

The described power synthesis type DOHERTY width of cloth locks the amplification detection unit mutually, it is characterized in that:

5, according to claim 2, described distortion produces lock detection unit, it is characterized in that:

6, according to claim 2,1 detecting unit is amplified in described distortion locking, it is characterized in that:

7, according to claim 2, described signal is characterized in that pin 1 self-locking detecting unit:

8, according to claim 2, described pilot tone audio producing modulating unit is characterized in that:

Its produces the pilot signal be used for the analog distortion signal, two audio signals and two audio signal IQ formulas is modulated at pilot signal, and it is made up of frequency synthesizer 411, IQ modulator 412, IQ modulator 413, biasing I414, single audio frequency generator 416, biasing Q415 and single audio frequency generator 417.Frequency synthesizer 411 produces a signal LO1 approaching with the distorted signal frequency under the control of little processing control signals CP, be input to IQ modulator 412, also exports one tunnel mixed frequency signal the same with LO1 simultaneously; IQ modulator 412 carries out the IQ modulation to LO1 under the effect of biasing I 414 and biasing Q415, output signal DP1 is to IQ modulator 413; IQ modulator 4133 carries out the IQ modulation to LO2 under the effect of 2 liang of signals of audio frequency that the audio frequency 1 and the single-tone generator 417 of 416 outputs of single-tone generator are exported, the pilot signal DP2 of double-tone IQ modulation has frequently been carried out in output.Little processing control signals CP is mainly used in the frequency that changes pilot tone.

9, according to claim 2, described distortion coupling is characterized in that pin 2 detecting units:

Described multiplication type distortion coupling is characterized in that the pin detecting unit:

Described IQ Demodulation Type distortion coupling is characterized in that the pin detecting unit:

10, according to claim 2, described software main-process stream and software look-up table is characterized in that: