WO2016172860A1 - 一种信号处理的方法及装置 - Google Patents

一种信号处理的方法及装置 Download PDF

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Publication number
WO2016172860A1
WO2016172860A1 PCT/CN2015/077706 CN2015077706W WO2016172860A1 WO 2016172860 A1 WO2016172860 A1 WO 2016172860A1 CN 2015077706 W CN2015077706 W CN 2015077706W WO 2016172860 A1 WO2016172860 A1 WO 2016172860A1
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Prior art keywords
signal
transmitted
pulse
amplitude
sampling
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PCT/CN2015/077706
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English (en)
French (fr)
Inventor
刘智涌
韩冬
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华为技术有限公司
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Priority to PCT/CN2015/077706 priority Critical patent/WO2016172860A1/zh
Publication of WO2016172860A1 publication Critical patent/WO2016172860A1/zh

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    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03FAMPLIFIERS
    • H03F1/00Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52Circuit arrangements for protecting such amplifiers

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a signal processing method and apparatus.
  • the power amplifier is a very important component in the downlink channel of the base station, and the signal to be transmitted needs to be amplified by the power amplifier before being transmitted by the antenna.
  • the base station generally has a multi-stage power amplifier, and the signal to be transmitted can be amplified step by step, wherein The final stage power amplifier is responsible for the final stage of amplification of the transmitted signal, so the final stage power amplifier often operates at high power, is easily damaged by over-piezoelectric breakdown, and, with the wide application of high-speed digital modulation signals, high speed
  • the overshoot pulse is easily formed.
  • the schematic diagram of the overshoot pulse is shown in FIG. The occurrence of overshoot pulses will have a certain impact on the final stage power amplifier. Repeated occurrence of overshoot pulses will cause sudden damage to the power amplifier, which will result in the entire base station not working properly, resulting in great economic loss.
  • the method for protecting the final stage power amplifier is generally to couple a part of the signal from the signal outputted by the final stage power amplifier, and to detect and determine the part of the signal.
  • the input is lowered.
  • the power of the signal to be transmitted before the final stage power amplifier is such that the signal to be transmitted does not exceed the safety threshold of the final stage power amplifier after being amplified by the final stage power amplifier.
  • Embodiments of the present invention provide a method and apparatus for signal processing, which can solve the problem that a high probability of damage to a final stage power amplifier due to an overshoot pulse generated by a final stage power amplifier for a high speed digital signal.
  • an embodiment of the present invention provides a method for signal processing, including:
  • the signal to be amplified is transmitted to an amplifying circuit.
  • the acquiring a cancellation pulse of the signal to be transmitted; and superposing the cancellation pulse with the signal to be transmitted to generate a signal to be amplified including:
  • the cancellation pulse is superimposed with the signal to be transmitted to generate the signal to be amplified.
  • the acquiring the cancellation pulse of the signal to be transmitted includes:
  • the method further includes: before the receiving the signal to be transmitted, the method further includes:
  • the determining the cancellation pulse corresponding to the to-be-transmitted signal of any one of the different modulation modes includes:
  • the time period during which the signal generates an overshoot pulse, and the current modulation mode is a modulation mode of the currently received signal to be transmitted;
  • a cancellation pulse of the signal to be transmitted of the current modulation mode is stored.
  • the sampling signal passing the sampling moments, the amplitude of the overshoot pulse corresponding to each sampling moment, and the safety margin Generating a cancellation pulse of the to-be-transmitted signal of the current modulation mode, including:
  • a proportional coefficient (B(t)-A)/B(t) is generated for each sampled signal by the safe amplitude and the amplitude of the overshoot pulse corresponding to each sampling instant, where t is the sampling instant, B(t) For the amplitude of the overshoot pulse corresponding to the sampling instant t, A is the safe amplitude;
  • Each sampled signal x(n, t) is multiplied by a respective proportional coefficient, and each sampled signal becomes x(n, t) ⁇ (B(t)-A)/B(t);
  • a cancellation pulse of the current modulation mode to be transmitted is obtained, and the cancellation pulse is -x(n, t) ⁇ (B(t)- A) / B (t).
  • an apparatus for signal processing including:
  • a receiving unit configured to receive a signal to be transmitted
  • An acquisition unit configured to acquire a cancellation pulse of the to-be-transmitted signal received by the receiving unit, where the cancellation pulse is used to cancel an overshoot pulse of the signal to be transmitted;
  • a superimposing unit superimposing the cancellation pulse acquired by the acquiring unit and the to-be-transmitted signal received by the receiving unit to generate a signal to be amplified
  • a sending unit configured to send the to-be-amplified signal to the amplifying circuit.
  • the acquiring unit is further configured to acquire a cancellation pulse of the signal to be transmitted before a preset time, where the preset time is a time when the signal to be transmitted starts to generate an overshoot pulse;
  • the superimposing unit is further configured to superimpose the cancellation pulse acquired by the acquiring unit and the signal to be transmitted at the preset time to generate the signal to be amplified.
  • the acquiring unit is further configured to determine a modulation mode of the to-be-transmitted signal; The cancellation mode corresponding to the modulation mode of the transmitted signal.
  • the device further includes: a determining unit;
  • the determining unit is configured to determine a time period in which an overshoot pulse is generated by a signal to be transmitted of different modulation modes and an amplitude of an overshoot pulse at each time in the time period of the overshoot pulse; and the signal to be transmitted generated by different modulation modes is generated
  • the time period of the pulse, the amplitude of the overshoot pulse at each time, and the safety amplitude determine the cancellation pulse corresponding to the signal to be transmitted of different modulation modes, and the safety amplitude is the output signal when the final power amplifier is not damaged. The most significant.
  • the determining unit includes: a receiving subunit, a sampling subunit, a generating subunit, and a storing subunit;
  • the receiving subunit is further configured to receive a signal to be transmitted in any modulation mode
  • the sampling subunit is configured to sample the to-be-transmitted signal of the current modulation mode at each sampling moment in the preset time period to obtain a sampling signal at each sampling moment, where the preset time period is the current modulation mode. a period of time during which the signal to be transmitted generates an overshoot pulse, and the current modulation mode is a modulation mode of the currently received signal to be transmitted;
  • the generating subunit is configured to generate, by the sampling signal at each sampling moment, an amplitude of an overshoot pulse corresponding to each sampling moment, and the safety amplitude, a cancellation pulse of the current modulation mode to be transmitted signal;
  • the storage subunit is configured to store a cancellation pulse of the signal to be transmitted in the current modulation mode.
  • the generating subunit is specifically configured to pass the security amplitude and an amplitude of an overshoot pulse corresponding to each sampling moment.
  • Each sampling signal generates a scaling factor (B(t)-A)/B(t), where t is the sampling instant, B(t) is the amplitude of the overshoot pulse corresponding to the sampling instant t, and A is the Safe amplitude; multiply each sampled signal x(n,t) by its own proportionality factor, then each sampled signal becomes x(n,t) ⁇ (B(t)-A)/B(t)
  • a cancellation pulse of the current modulation mode to be transmitted is generated, and the cancellation pulse is -x(n, t) ⁇ (B(t) -A)/B(t).
  • an apparatus for signal processing including:
  • a memory for storing information including program instructions
  • a receiver for receiving a signal to be transmitted
  • a processor coupled to the memory for controlling execution of the program instruction, specifically for acquiring a cancellation pulse of the signal to be transmitted, wherein the cancellation pulse is used to cancel an overshoot pulse of the signal to be transmitted And superposing the cancellation pulse with the signal to be transmitted to generate a signal to be amplified;
  • a transmitter configured to send the to-be-amplified signal to the amplifying circuit.
  • the processor is further configured to acquire a cancellation pulse of the to-be-transmitted signal before a preset time, where the preset time is the to-be-transmitted a moment at which the signal begins to generate an overshoot pulse; at the preset time, the cancellation pulse is superimposed with the signal to be transmitted to generate the signal to be amplified.
  • the processor is further configured to determine a modulation mode of the signal to be transmitted, and acquire the to-be-transmitted The modulation mode of the signal corresponds to the cancellation pulse.
  • the processor is further configured to determine a time period in which an overshoot pulse is generated by a signal to be transmitted of different modulation modes and an amplitude of an overshoot pulse at each time in a period of the overshoot pulse; according to a time period of the overshoot pulse
  • the amplitude of the overshoot pulse and the safety margin at each moment are set to corresponding cancellation pulses for the signals to be transmitted of different modulation modes, and the safety amplitude is the maximum amplitude of the output signal when the final power amplifier is not damaged.
  • the receiver is further configured to receive a signal to be transmitted in any modulation mode
  • the processor is further configured to sample the to-be-transmitted signal of the current modulation mode at each sampling moment in a preset time period to obtain a sampling signal at each sampling moment, where the preset time period is the current modulation.
  • the mode in which the signal to be transmitted generates an overshoot pulse
  • the current modulation mode is a modulation mode of the currently received signal to be transmitted; the amplitude of the overshoot pulse corresponding to the sampling signal at each sampling time and each sampling time And the security amplitude, generating a cancellation pulse of the to-be-transmitted signal of the current modulation mode;
  • the memory is further configured to store a cancellation pulse of the signal to be transmitted in the current modulation mode.
  • the processor is further configured to generate a scaling factor (B(t)-A)/B(t) for each sampled signal by using the safe amplitude and the amplitude of the overshoot pulse corresponding to each sampling moment, where t is a sampling At time, B(t) is the amplitude of the overshoot pulse corresponding to the sampling instant t, and A is the safe amplitude; each of the sampled signals x(n, t) is multiplied by a respective proportional coefficient, and each The sampling signal becomes x(n, t) ⁇ (B(t)-A)/B(t); the processed sampling signal is combined and then inverted to obtain the signal to be transmitted of the current modulation mode.
  • the cancellation pulse is -x(n,t) ⁇ (B(t)-A)/B(t).
  • the method and device for signal processing according to the embodiment of the present invention superimpose the received signal to be transmitted and the cancellation pulse of the signal to be transmitted to generate a signal to be amplified, and then send the signal to be amplified to the amplifying circuit.
  • the probability of damage to the final stage power amplifier is high due to the inability to take protective measures for the final stage power amplifier in time.
  • the cancellation pulse is to be transmitted before the signal to be transmitted enters the power amplifier.
  • the overshoot pulse of the signal is eliminated, so that the signal to be amplified does not generate an overshoot pulse after being amplified by the power amplifier in the amplifying circuit, which effectively protects the final stage power amplifier and reduces the probability of damage of the final stage power amplifier.
  • FIG. 1 is an exemplary schematic diagram of a final stage power amplifier output signal provided by the background art
  • FIG. 2 is a schematic diagram of a logical structure of a system for signal processing according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for signal processing according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of another method for signal processing according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of another method for signal processing according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a logical structure of a digital signal processing module in a signal processing system according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a logical structure of a device for signal processing according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a logical structure of another apparatus for signal processing according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a logical structure of another apparatus for signal processing according to an embodiment of the present invention.
  • the embodiment of the present invention is mainly applied to a system for signal processing of a base station.
  • the system includes: a digital signal processing module 201, an amplifying circuit 202, a coupler 203, and an antenna 204.
  • the amplifying circuit 202 includes a digital analog/ The analog to digital converter 2021, the first to Nth stage power amplifiers 2022, and the final stage power amplifier 2023, wherein the digital signal processing module 201 is a module for performing the method of signal processing provided by the embodiment of the present invention.
  • the digital signal processing module 201 is configured to receive a signal to be transmitted, acquire a cancellation pulse of the signal to be transmitted, and superimpose the cancellation pulse and the signal to be transmitted within a preset time period to generate a signal to be amplified.
  • the signal to be transmitted and the signal to be amplified are both digital signals
  • the cancellation pulse is a cancellation pulse for canceling the overshoot pulse of the transmission signal.
  • the amplifying circuit 202 is configured to amplify the signal to be amplified, and send the amplified signal to the antenna 204 for transmission.
  • the digital-to-analog/analog-to-digital converter 2021 in the amplifying circuit 202 is configured to convert the signal to be amplified generated by the digital signal processing module 201 into an analog signal.
  • the first to Nth stage power amplifiers 2022 are configured to perform stepwise amplification of the signals to be amplified that have been converted into analog signals.
  • the final stage power amplifier 2023 is configured to perform final stage amplification on the signal to be amplified that has been converted into an analog signal, and transmit the amplified output signal to the antenna 204 for transmission.
  • system for signal processing provided by the embodiment of the present invention can also generate a cancellation pulse for signals to be transmitted of different modulation modes.
  • the final stage power amplifier 2023 is also used to perform the final stage amplification on the signals to be transmitted of different modulation modes.
  • the coupler 203 is configured to couple a portion of the output analog signal from the output portion of the final stage power amplifier 2023.
  • the digital-to-analog/analog-to-digital converter 2021 is further configured to convert the output analog signal coupled out by the coupler 203 into an output digital signal.
  • the digital signal processing module 201 is further configured to determine, by outputting the digital signal, a time period during which the signal to be transmitted generates an overshoot pulse, and sample the output digital signal during the time period to determine the amplitude of the output digital signal at each sampling time.
  • the output analog signal coupled by the coupler 203 is not exactly the same as the signal output by the final stage power amplifier 2023, but has a certain proportional relationship, the output analog signal coupled by the coupler 203 is compared with the output of the final stage power amplifier 2023.
  • the signal is reduced by M times, and M is a natural number greater than 1, so the digital signal processing module 201 determines the amplitude of the output digital signal at each sampling time, and then multiplies the amplitudes of the output digital signals at each sampling time by M to obtain each time. The amplitude of the overshoot pulse.
  • the digital signal processing module 201 is further configured to sample the signal to be transmitted in any modulation mode to obtain a sampling signal, and then generate a current by using the sampling signal at each sampling moment, the amplitude of the overshoot pulse corresponding to each sampling moment, and the safety amplitude.
  • the cancellation mode of the signal to be transmitted in the modulation mode, and the cancellation pulse of the signal to be transmitted in the current modulation mode is stored.
  • a base station can transmit signals to be transmitted in different modulation modes in different time periods. Therefore, before the base station works normally, the digital signal processing module needs to store pairs of signals to be transmitted of all modulation modes that the base station can transmit. Eliminate the pulse.
  • the embodiment of the present invention provides a signal processing method, and the execution subject of the embodiment of the present invention is the above signal processing.
  • a digital signal processing module in the system, as shown in FIG. 3, the method includes:
  • the cancellation pulse is stored in the digital signal processing module in advance, and after receiving the digital signal to be transmitted, the digital signal processing module can retrieve the cancellation pulse of the digital signal to be transmitted.
  • the cancellation pulse of the signal to be transmitted and the signal to be transmitted is input to an adder of the digital signal processing module, and in the adder, the cancellation pulse is superimposed with a portion of the signal to be transmitted that generates an overshoot pulse, thereby generating a signal to be amplified.
  • the signal to be amplified is generated by superimposing the signal to be transmitted and the cancellation pulse, the signal to be amplified does not generate an overshoot pulse after passing through the final stage power amplifier of the amplifying circuit.
  • the signal to be amplified is subjected to a digital-to-analog/analog-to-digital converter to convert the signal to be amplified into an analog signal.
  • the signal is then amplified by the first to Nth stage power amplifiers, and then amplified by the final stage power amplifier. Since the overshoot pulse is already cancelled in the digital domain of the signal to be transmitted, the final stage power amplifier The output signal does not generate an overshoot pulse, and then the output signal of the final stage power amplifier is transmitted by the antenna.
  • the signal processing method provided by the embodiment of the present invention superimposes the received signal to be transmitted and the cancellation pulse of the signal to be transmitted to generate a signal to be amplified, and then sends the signal to be amplified to the amplifying circuit.
  • the probability of damage to the final stage power amplifier is high due to the inability to take protective measures for the final stage power amplifier in time.
  • the cancellation pulse is to be transmitted before the signal to be transmitted enters the power amplifier.
  • the overshoot pulse of the signal is eliminated, so that the signal to be amplified does not generate an overshoot pulse after being amplified by the power amplifier in the amplifying circuit, which effectively protects the final stage power amplifier and reduces the probability of damage of the final stage power amplifier.
  • steps 302-303 may specifically be used in the method flow shown in FIG. 3, in order to make the cancellation pulse cancel the overshoot pulse of the signal to be transmitted.
  • the execution is as follows in steps 401-402.
  • the cancellation pulse is superimposed with the signal to be transmitted to generate a signal to be amplified.
  • the overshoot pulse of the signal to be transmitted can be eliminated by superimposing the cancellation pulse and the overshoot pulse of the signal to be transmitted at the time when the signal to be transmitted generates an overshoot pulse.
  • the signal processing method provided by the embodiment of the present invention acquires a cancellation pulse of a signal to be transmitted before the signal to be transmitted begins to generate an overshoot, and superimposes the cancellation pulse and the signal to be transmitted at a time when the signal to be transmitted generates an overshoot pulse.
  • the overshoot pulse can be accurately superimposed with the overshoot pulse of the signal to be transmitted, thereby eliminating the overshoot pulse and reducing the probability of damage of the final power amplifier.
  • the foregoing step 302 may be specifically implemented as the following step 3021. 3022.
  • the modulation method of the signal to be transmitted includes: ASK (Amplitude Shift Keying), PSK (Phase-Shift Keying), FSK (Frequency-Shift Keying), QAM (Quadrature) Amplitude Modulation, MSK (Minimum Shift Keying), GMSK (Gaussian Filtered Minimum Shift Keying), OFDM (Orthogonal Frequency Division Multiplexing) Use technology).
  • ASK Amplitude Shift Keying
  • PSK Phase-Shift Keying
  • FSK Frequency-Shift Keying
  • QAM Quadrature Amplitude Modulation
  • MSK Minimum Shift Keying
  • GMSK Gausian Filtered Minimum Shift Keying
  • OFDM Orthogonal Frequency Division Multiplexing
  • the power amplifier has different responses to signals to be transmitted of different modulation modes. Therefore, after the signals to be transmitted of different modulation modes are amplified by the final power amplifier, the overshoot pulses generated are also different, in order to eliminate the overshoot pulse, The modulation of the signal to be transmitted is determined to determine a cancellation pulse corresponding to the modulation of the signal to be transmitted.
  • the method for obtaining the cancellation pulse of the signal to be transmitted in the above step 401 can also be implemented as steps 3021-3022.
  • the method for signal processing determines a modulation mode of a signal to be transmitted, acquires a cancellation pulse corresponding to a modulation mode of a signal to be transmitted, and further superimposes the acquired cancellation pulse and the signal to be transmitted to generate a signal to be amplified. .
  • the cancellation of the cancellation pulses corresponding to the respective modulation modes can more accurately eliminate the overshoot pulses of the signals to be transmitted, and the output power of the final stage power amplifier is determined to be exceeded compared with the prior art.
  • the protection is performed after the security margin, and the embodiment of the present invention sends the signal to be transmitted and the cancellation before the signal to be transmitted enters the power amplifier.
  • the pulse is superimposed so that the signal to be transmitted does not generate an overshoot pulse after passing through the final stage power amplifier, so that the output power of the final stage power amplifier does not exceed the safe range, which reduces the probability of damage of the final stage power amplifier.
  • the period of the overshoot pulse generated by the signal to be transmitted of different modulation modes and the amplitude of the overshoot pulse at each moment of the overshoot pulse period are determined by measuring the response of the final stage power amplifier to the signals to be transmitted of different modulation modes, so The signals to be transmitted of different modulation modes are respectively subjected to analog-to-digital conversion, and then amplified by a multi-stage power amplifier in the base station, and the output signal of the final stage power amplifier is detected to determine the time of the overshoot pulse generated by the signal to be transmitted of different modulation modes. The amplitude of the segment and the overshoot pulse at each moment.
  • the specific method for determining the amplitude of the overshoot pulse of the signal to be transmitted for each modulation mode is: after the amplification of the signal to be transmitted via the first to Nth stage power amplifiers in the base station and the final stage power amplifier, the coupler is powered from the final stage.
  • the output portion of the amplifier couples a part of the output analog signal, and after the digital-analog/analog-to-digital converter converts the output analog signal into an output digital signal, the digital signal processing module determines the time period during which the signal to be transmitted generates an overshoot pulse by outputting the digital signal. During the time period, the output digital signal is sampled to determine the amplitude of the output digital signal at each sampling time.
  • the digital signal processing module can detect the time period during which the output digital signal generates an overshoot pulse. For example, when the period of the overshoot pulse is 0 ns to 10 ns of the output digital signal, it is determined that the period during which the signal to be transmitted generates an overshoot pulse is the 0 ns to 10 ns of the signal to be transmitted.
  • the digital signal processing module After determining the time period of the overshoot pulse generated by the signal to be transmitted of each modulation mode and the amplitude of the overshoot pulse at each time, the digital signal processing module
  • the cancellation pulse corresponding to the signal to be transmitted of different modulation modes may be determined according to the time period of the overshoot pulse, the amplitude of the overshoot pulse at each time, and the safety amplitude, wherein the safety amplitude is such that the final power amplifier is not damaged.
  • the maximum amplitude of the output signal may be determined according to the time period of the overshoot pulse, the amplitude of the overshoot pulse at each time, and the safety amplitude, wherein the safety amplitude is such that the final power amplifier is not damaged. The maximum amplitude of the output signal.
  • the method of determining the cancellation pulse corresponding to the signal to be transmitted in any of the different modulation modes may be implemented as the following steps 602 to 604.
  • the time period in which the preset time period is the overshoot pulse generated by the to-be-transmitted signal of the current modulation mode is described in the embodiment in which the time period during which the overshoot pulse is generated by the signal to be transmitted is t 1 -t 2 .
  • the current modulation mode is the modulation mode of the currently received signal to be transmitted.
  • the specific method for generating the cancellation pulse of the signal to be transmitted in the current modulation mode is:
  • a proportional coefficient (B(t)-A)/B(t) is generated for each sampled signal by the safe amplitude and the amplitude of the overshoot pulse corresponding to each sampling instant, where t is the sampling time and B(t) is the sampling.
  • the amplitude of the overshoot pulse corresponding to time t, A is the safe amplitude.
  • Each sampled signal is multiplied by a respective proportional coefficient, and each sampled signal becomes x(n, t) ⁇ (B(t)-A)/B(t);
  • the processed sampling signal is combined and then inverted to obtain a cancellation pulse of the current modulation mode to be transmitted, and the cancellation pulse is -x(n,t) ⁇ (B(t)-A)/B (t).
  • the logical structure diagram of the digital signal processing module in FIG. 2 is as shown in FIG. 7.
  • the digital signal processing module includes a time judging module, an allocation module, at least two CPGs (Cancellation Pulse Generators), and at least two Multiplier and combiner module.
  • the time judging module is connected to the distribution module and the plurality of multipliers for sampling the digital signal to be transmitted to obtain a sampling signal, and transmitting the sampling signal to the distribution module and the multiplier, respectively.
  • the allocation module is connected to a plurality of CPGs for allocating sampling signals at different sampling times to different CPGs.
  • Each CPG is connected to a multiplier for generating the sampled signal according to the received sampling signal
  • the scale factor of the number and the scale factor is sent to the corresponding multiplier.
  • the number of CPGs is the same as the number of multipliers.
  • a multiplier for multiplying a sampled signal received from the time determination module by a scale factor of the sampled signal received from the CPG.
  • the combining module is connected to all the multipliers for combining the signals output by all the multipliers and then inverting the signals, thereby outputting the cancellation pulses of the signals to be transmitted.
  • the time judging module receives t from x(n, t). 1 ns starts x (n, t) is sampled until receiving nanoseconds after t 2 x (n, t) end of the sampling, the sampling time determining module will send signals to the distribution module and a multiplier.
  • the allocation module allocates sampling signals at different times in the time period t 1 -t 2 to different CPGs for processing, and each CPG determines the sampling time t by the received sampling signals, thereby searching for the overshoot pulse corresponding to the sampling time t.
  • the amplitude B(t) is used to generate a proportional coefficient (B(t)-A)/B(t) for the received sampled signal by the safe amplitude and the amplitude of the overshoot pulse corresponding to the sampling time.
  • Each CPG outputs a proportional coefficient of the sampled signal, and each sampled signal is multiplied by a corresponding multiplication factor by a multiplier, and finally the combined circuit combines the processed sampled signals and then inverts the processed signal.
  • the cancellation pulse is -x(n,t) ⁇ (B(t)-A)/B(t), and the cancellation is performed during the time period of t 1 -t 2
  • the amplitude of the pulse is the same as the amplitude of the digital signal to be transmitted, and the phase is opposite.
  • a cancellation pulse of a modulation mode to be transmitted may be stored, and finally, a cancellation pulse of a signal to be transmitted of each modulation mode that the base station can transmit is stored.
  • steps 301 to 304 may be performed to superimpose the received signal to be transmitted and its corresponding cancellation pulse to cancel the signal to be transmitted. Punch pulse.
  • the signal after the power amplifier is mathematically multiplied by the signal to be transmitted.
  • the output signal has an overshoot pulse in t 1 -t 2 , and in the embodiment of the present invention, after the signal to be transmitted is superimposed with the cancellation pulse, the amplitude of the output signal in t 1 -t 2 is A, which does not cause a power amplifier. damage.
  • the method for signal processing determines the time period of the overshoot pulse generated by the signal to be transmitted of different modulation modes and the amplitude of the overshoot pulse at each time in the time period of the overshoot pulse, and then in the preset time period
  • the signal to be transmitted of the current modulation mode is sampled, so that the canceled pulse of the signal to be transmitted in the current modulation mode is determined by the sampling signal at each sampling time, the amplitude of the overshoot pulse corresponding to each sampling time, and the safety amplitude.
  • the cancellation pulse is obtained according to the response of the final stage power amplifier to the signal to be transmitted and the characteristics of the signal to be transmitted, the superimposition of the signal to be transmitted and the corresponding cancellation pulse can more accurately eliminate the overshoot pulse of the signal to be transmitted.
  • the cancellation pulse of the signal to be transmitted of different modulation modes is stored in advance, and the cancellation pulse of the signal to be transmitted can be quickly retrieved when the base station is actually working, thereby quickly canceling the overshoot pulse of the signal to be transmitted, and reducing the end. The probability of damage to the stage power amplifier.
  • an embodiment of the present invention further provides a signal processing apparatus.
  • the apparatus includes: a receiving unit 801, an obtaining unit 802, a superimposing unit 803, and a sending unit 804.
  • the receiving unit 801 is configured to receive a signal to be transmitted.
  • the obtaining unit 802 is configured to acquire a cancellation pulse of the signal to be transmitted received by the receiving unit 801, and the cancellation pulse is used to cancel the overshoot pulse of the signal to be transmitted.
  • the superimposing unit 803 is configured to superimpose the cancellation pulse acquired by the obtaining unit 802 with the to-be-transmitted signal received by the receiving unit 801 to generate a signal to be amplified.
  • the sending unit 804 is configured to send the signal to be amplified to the amplifying circuit.
  • the embodiment of the present invention further provides a signal processing apparatus.
  • the apparatus further includes: a determining unit 805.
  • the determining unit 805 includes a receiving subunit 8051, a sampling subunit 8052, and a generating subunit 8053.
  • the storage subunit 8054 includes a signal processing apparatus.
  • the obtaining unit 802 is further configured to acquire a cancellation pulse of the signal to be transmitted before the preset time, Let the moment be the moment when the signal to be transmitted begins to generate an overshoot pulse.
  • the superimposing unit 803 is further configured to superimpose the cancellation pulse acquired by the acquiring unit 802 and the signal to be transmitted at a preset time to generate a signal to be amplified.
  • the obtaining unit 802 is further configured to determine a modulation mode of the signal to be transmitted, and acquire a cancellation pulse corresponding to a modulation mode of the signal to be transmitted.
  • the determining unit 805 is configured to determine a period of the overshoot pulse generated by the signal to be transmitted of different modulation modes and an amplitude of the overshoot pulse at each time in the period of the overshoot pulse;
  • the mode of the signal to be transmitted generates a period of the overshoot pulse, the amplitude of the overshoot pulse at each moment, and the safety amplitude, and determines the cancellation pulse corresponding to the signal to be transmitted of different modulation modes.
  • the safe range is the maximum amplitude of the output signal when the final stage power amplifier is not damaged.
  • the receiving subunit 8051 is configured to receive a signal to be transmitted in any modulation mode.
  • the sampling sub-unit 8052 is configured to sample the to-be-transmitted signal of the current modulation mode at each sampling time in the preset time period to obtain a sampling signal at each sampling time, and the preset time period is generated by the current modulation mode to be transmitted.
  • the current modulation mode is the modulation mode of the currently received signal to be transmitted.
  • the generating sub-unit 8053 is configured to generate a cancellation pulse of the to-be-transmitted signal of the current modulation mode by using the sampling signal at each sampling moment, the amplitude of the overshoot pulse corresponding to each sampling moment, and the safety amplitude, and the safety amplitude is not the final power.
  • the storage subunit 8054 is configured to store a cancellation pulse of a signal to be transmitted in a current modulation mode.
  • the storage sub-unit 8054 can store cancellation pulses of signals to be transmitted of different modulation schemes.
  • the generating sub-unit 8053 is specifically configured to generate a scaling factor (B(t)-A)/B(t) for each sampling signal by using a safe amplitude and an amplitude of an overshoot pulse corresponding to each sampling moment, where t is a sampling At the moment, B(t) is the amplitude of the overshoot pulse corresponding to the sampling time t, and A is the safe amplitude; each sampling signal x(n, t) is multiplied by the respective proportional coefficient, and each sampling signal becomes x(n,t) ⁇ (B(t)-A)/B(t); combining the processed sampled signals and then performing inverse processing to obtain a cancellation pulse of the signal to be transmitted in the current modulation mode, The cancellation pulse is -x(n,t) ⁇ (B(t)-A)/B(t).
  • the superimposing unit receives the to-be received by the receiving unit
  • the transmitting signal is superimposed with the cancellation pulse of the signal to be transmitted acquired by the acquiring unit to generate a signal to be amplified, and then the signal to be amplified is sent to the amplifying circuit.
  • the probability of damage to the final stage power amplifier is high due to the inability to take protective measures for the final stage power amplifier in time.
  • the cancellation pulse is to be transmitted before the signal to be transmitted enters the power amplifier.
  • the overshoot pulse of the signal is eliminated, so that the signal to be transmitted does not generate an overshoot pulse after being amplified by the power amplifier, effectively protecting the final stage power amplifier and reducing the probability of damage of the final stage power amplifier.
  • the embodiment of the invention further provides a device for signal processing.
  • the device is a hardware structure diagram of the digital signal processing module described in FIG.
  • the digital signal processing module may include a memory 1001, a processor 1002, a receiver 1003, a transmitter 1004, and a bus 1005.
  • the memory 1001 may be a ROM (Read Only Memory), a static storage device, a dynamic storage device, or a RAM (Random Access Memory).
  • the memory 1001 can store an operating system and other applications.
  • the program code for implementing the technical solution provided by the embodiment of the present invention is saved in the memory 1001 and executed by the processor 1002.
  • the receiver 1003 is used for communication between the device and other devices or communication networks (such as, but not limited to, Ethernet, RAN Radio Access Network, WLAN (Wireless Local Area Network), etc.).
  • devices or communication networks such as, but not limited to, Ethernet, RAN Radio Access Network, WLAN (Wireless Local Area Network), etc.
  • the processor 1002 may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for executing related programs.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • Bus 1005 can include a path for communicating information between various components of the device (e.g., memory 1001, receiver 1003, transmitter 1004, and processor 1002).
  • FIG. 10 only shows the memory 1001, the receiver 1003, the transmitter 1004, and the processor 1002, and the bus 1004, in the specific implementation process, those skilled in the art should understand that the terminal also Contains other devices necessary to achieve proper operation. At the same time, those skilled in the art will appreciate that hardware devices that implement other functions may also be included, depending on the particular needs.
  • the digital signal processing module shown in FIG. 10 is used to implement the embodiment shown in FIG. 8-9.
  • the receiver 1003 in the device is configured to receive a signal to be transmitted.
  • the processor 1002 is coupled to the memory 1001, the receiver 1003, and the transmitter 1004 for controlling execution of program instructions, specifically for acquiring a cancellation pulse of a signal to be transmitted, and the cancellation pulse is used for canceling an overshoot pulse of the signal to be transmitted.
  • the superimposed pulse is superimposed with the signal to be transmitted to generate a signal to be amplified.
  • the transmitter 1004 is configured to send a signal to be amplified to the amplifying circuit.
  • the processor 1002 is further configured to: before the preset time, acquire a cancellation pulse of the signal to be transmitted, where the preset time is a time when the signal to be transmitted starts to generate an overshoot pulse; and at a preset time, the cancellation pulse and the signal to be transmitted are to be transmitted. Superimpose to generate a signal to be amplified.
  • the processor 1002 is further configured to determine a modulation mode of the signal to be transmitted, and acquire a cancellation pulse corresponding to a modulation mode of the signal to be transmitted.
  • the processor 1002 is further configured to determine a period of the overshoot pulse generated by the signal to be transmitted of different modulation modes and an amplitude of the overshoot pulse at each time in the period of the overshoot pulse; and overshoot according to the time period of the overshoot pulse and each time
  • the amplitude and the safe amplitude of the pulse are set to corresponding cancellation pulses for the signals to be transmitted of different modulation modes, and the safety amplitude is the maximum amplitude of the output signal when the final power amplifier is not damaged.
  • the receiver 1003 is further configured to receive a signal to be transmitted in any modulation mode.
  • the processor 1002 is further configured to sample the to-be-transmitted signal of the current modulation mode at each sampling moment in the preset time period to obtain a sampling signal at each sampling moment, where the preset time period is generated by the current modulation mode to be transmitted.
  • the current modulation mode is the modulation mode of the currently received signal to be transmitted; the sampling signal at each sampling time, the amplitude of the overshoot pulse corresponding to each sampling time, and the safety amplitude are generated to generate the current modulation mode to be transmitted.
  • the cancellation pulse of the signal is the frequency of the current modulation mode at each sampling moment in the preset time period to obtain a sampling signal at each sampling moment, where the preset time period is generated by the current modulation mode to be transmitted.
  • the memory 1001 is further configured to store a cancellation pulse of a signal to be transmitted in a current modulation mode.
  • the processor 1002 is further configured to generate a proportional coefficient (B(t)-A)/B(t) for each sampled signal by using a safe amplitude and an amplitude of an overshoot pulse corresponding to each sampling moment, where t is a sampling moment , B(t) is the amplitude of the overshoot pulse corresponding to the sampling instant t, and A is the safe amplitude; each sampled signal x(n, t) is multiplied by the respective proportional coefficient, and each sampled signal becomes x.
  • the processor superimposes the received signal to be transmitted and the cancellation pulse of the signal to be transmitted to generate a signal to be amplified, and the transmitter sends the signal to be amplified to the amplifying circuit.
  • the probability of damage to the final stage power amplifier is high due to the inability to take protective measures for the final stage power amplifier in time.
  • the cancellation pulse is to be transmitted before the signal to be transmitted enters the power amplifier. The overshoot pulse of the signal is eliminated, so that the signal to be transmitted does not generate an overshoot pulse after being amplified by the final stage power amplifier, effectively protecting the final stage power amplifier and reducing the probability of damage of the final stage power amplifier.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on this understanding, this The technical solution of the invention, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions. One or all of the steps of a method described in various embodiments of the present invention are performed by a computer device (which may be a personal computer, server, or network device, etc.) or a processor.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

Abstract

本发明公开一种信号处理的方法及装置,涉及无线通信技术领域,可以解决因末级功率放大器对高速数字信号响应产生过冲脉冲,而导致末级功率放大器出现损坏的概率高的问题。本发明实施例通过接收待发射信号,获取待发射信号的对消脉冲,对消脉冲用于抵消待发射信号的过冲脉冲,进而将对消脉冲与待发射信号叠加,生成待放大信号,向放大电路发送待放大信号。本发明实施例提供的方案适于对信号进行处理时采用。

Description

一种信号处理的方法及装置 技术领域
本发明涉及无线通信技术领域,尤其涉及一种信号处理的方法及装置。
背景技术
目前,功率放大器是基站的下行通道中非常重要的部件,待发射信号需要经过功率放大器的放大之后才能由天线进行发送,基站中一般有多级功率放大器,可以对待发射信号进行逐级放大,其中,末级功率放大器负责对待发射信号进行最后一级放大,所以末级功率放大器经常工作在高功率下,容易因为过压电击穿而损坏,并且,随着高速数字调制信号的广泛应用,高速数字信号作为待发射信号不能被基站中的末级功率放大器响应处理时,容易形成过冲脉冲,过冲脉冲的示意图如图1所示。过冲脉冲的出现会对末级功率放大器造成一定的影响,多次出现过冲脉冲会导致功率放大器突发性损坏,进而导致整个基站无法正常工作,造成极大的经济损失。
目前保护末级功率放大器的方法一般为从末级功率放大器输出的信号中耦合出一部分信号,并对这部分信号进行检波判断,当判断出末级功率放大器的输出功率高于安全门限时,降低进入末级功率放大器前的待发射信号的功率,使待发射信号经过末级功率放大器的放大后不超过末级功率放大器的安全门限。
然而从发现末级功率放大器的输出功率高于安全值,到降低进入末级功率放大器前的待发射信号的功率,需要一定的反应时间,由于高速数字信号的高速传输特性,往往是在末级功率放大器已经损坏的情况下才开始保护动作,不能对末级功率放大器起到有效的保护作用,导致末级功率放大器出现损坏的概率高。
发明内容
本发明的实施例提供一种信号处理的方法及装置,可以解决因末级功率放大器对高速数字信号响应会产生过冲脉冲,而导致末级功率放大器出现损坏的概率高的问题。
为达到上述目的,本发明的实施例采用如下技术方案:
第一方面,本发明的实施例提供一种信号处理的方法,包括:
接收待发射信号;
获取所述待发射信号的对消脉冲,所述对消脉冲用于抵消所述待发射信号的过冲脉冲;
将所述对消脉冲与所述待发射信号叠加,生成待放大信号;
向放大电路发送所述待放大信号。
在第一种可能的实施例中,结合第一方面,所述获取所述待发射信号的对消脉冲;将所述对消脉冲与所述待发射信号叠加,生成待放大信号,包括:
在预设时刻之前,获取所述待发射信号的对消脉冲,所述预设时刻为所述待发射信号开始产生过冲脉冲的时刻;
在所述预设时刻,将所述对消脉冲与所述待发射信号叠加,生成所述待放大信号。
在第二种可能的实施例中,结合第一方面或第一方面中第一种可能的实施例,所述获取所述待发射信号的对消脉冲,包括:
确定所述待发射信号的调制方式;
获取所述待发射信号的调制方式对应的对消脉冲。
在第三种可能的实施例中,结合第一方面或第一方面中上述任一种可能的实施例,在所述接收待发射信号之前,所述方法还包括:
确定不同调制方式的待发射信号产生过冲脉冲的时间段以及所述过冲脉冲的时间段内各个时刻过冲脉冲的幅度;
根据所述过冲脉冲的时间段、各个时刻过冲脉冲的幅度以及安全幅度,确定不同调制方式的待发射信号对应的对消脉冲,所述安全幅度为不使所述末级功率放大器产生损坏时输出信号的最大幅度。
在第四种可能的实施例中,结合第一方面中第三种可能的实施例,所述确定不同调制方式中任一调制方式的待发射信号对应的对消脉冲,包括:
接收所述任一调制方式的待发射信号;
在预设时间段内的各采样时刻对当前调制方式的待发射信号进行采样,得到各采样时刻的采样信号,所述预设时间段为所述当前调制方式的待发射 信号产生过冲脉冲的时间段,所述当前调制方式为当前接收到的待发射信号的调制方式;
通过所述各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及所述安全幅度,生成所述当前调制方式的待发射信号的对消脉冲;
存储所述当前调制方式的待发射信号的对消脉冲。
在第五种可能的实施例中,结合第一方面中第四种可能的实施例,所述通过所述各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及所述安全幅度,生成所述当前调制方式的待发射信号的对消脉冲,包括:
通过所述安全幅度以及各采样时刻对应的过冲脉冲的幅度,为每个采样信号生成比例系数(B(t)-A)/B(t),其中,t为采样时刻,B(t)为所述采样时刻t对应的过冲脉冲的幅度,A为所述安全幅度;
将每个采样信号x(n,t)分别与各自的比例系数相乘,则每个采样信号变为x(n,t)·(B(t)-A)/B(t);
将经过处理的采样信号进行合路之后再反相处理,得到所述当前调制方式的待发射信号的对消脉冲,所述对消脉冲为-x(n,t)·(B(t)-A)/B(t)。
第二方面,本发明的实施例提供一种信号处理的装置,包括:
接收单元,用于接收待发射信号;
获取单元,用于获取所述接收单元接收到的所述待发射信号的对消脉冲,所述对消脉冲用于抵消所述待发射信号的过冲脉冲;
叠加单元,将获取单元获取到的所述对消脉冲与所述接收单元接收到的所述待发射信号叠加,生成待放大信号;
发送单元,用于向放大电路发送所述待放大信号。
在第一种可能的实施例中,结合第二方面,
所述获取单元,还用于在预设时刻之前,获取所述待发射信号的对消脉冲,所述预设时刻为所述待发射信号开始产生过冲脉冲的时刻;
所述叠加单元,还用于在所述预设时刻,将所述获取单元获取的对消脉冲与所述待发射信号叠加,生成所述待放大信号。
在第二种可能的实施例中,结合第二方面或第二方面中第一种可能的实施例,所述获取单元,还用于确定所述待发射信号的调制方式;获取所述待 发射信号的调制方式对应的对消脉冲。
在第三种可能的实施例中,结合第二方面或第二方面中上述任一种可能的实施例,所述装置还包括:确定单元;
所述确定单元,用于确定不同调制方式的待发射信号产生过冲脉冲的时间段以及所述过冲脉冲的时间段内各个时刻过冲脉冲的幅度;通过不同调制方式的待发射信号产生过冲脉冲的时间段、各个时刻过冲脉冲的幅度以及安全幅度,确定不同调制方式的待发射信号对应的对消脉冲,所述安全幅度为不使所述末级功率放大器产生损坏时输出信号的最大幅度。
在第四种可能的实施例中,结合第二方面中第三种可能的实施例,所述确定单元包括:接收子单元,采样子单元,生成子单元,存储子单元;
所述接收子单元,还用于接收任一调制方式的待发射信号;
所述采样子单元,用于在预设时间段内的各采样时刻对当前调制方式的待发射信号进行采样,得到各采样时刻的采样信号,所述预设时间段为所述当前调制方式的待发射信号产生过冲脉冲的时间段,所述当前调制方式为当前接收到的待发射信号的调制方式;
所述生成子单元,用于通过所述各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及所述安全幅度,生成所述当前调制方式的待发射信号的对消脉冲;
所述存储子单元,用于存储所述当前调制方式的待发射信号的对消脉冲。
在第五种可能的实施例中,结合第二方面中第四种可能的实施例,所述生成子单元,具体用于通过所述安全幅度以及各采样时刻对应的过冲脉冲的幅度,为每个采样信号生成比例系数(B(t)-A)/B(t),其中,t为采样时刻,B(t)为所述采样时刻t对应的过冲脉冲的幅度,A为所述安全幅度;将每个采样信号x(n,t)分别与各自的比例系数相乘,则每个采样信号变为x(n,t)·(B(t)-A)/B(t);将经过处理的采样信号进行合路之后再反相处理,生成所述当前调制方式的待发射信号的对消脉冲,所述对消脉冲为-x(n,t)·(B(t)-A)/B(t)。
第三方面,本发明的实施例提供一种信号处理的装置,包括:
存储器,用于存储包括程序指令的信息;
接收器,用于接收待发射信号;
处理器,与所述存储器耦合,用于控制所述程序指令的执行,具体用于获取所述待发射信号的对消脉冲,所述对消脉冲用于抵消所述待发射信号的过冲脉冲;将所述对消脉冲与所述待发射信号叠加,生成待放大信号;
发送器,用于向放大电路发送所述待放大信号。
在第一种可能的实施例中,结合第三方面,所述处理器,还用于在预设时刻之前,获取所述待发射信号的对消脉冲,所述预设时刻为所述待发射信号开始产生过冲脉冲的时刻;在所述预设时刻,将所述对消脉冲与所述待发射信号叠加,生成所述待放大信号。
在第二种可能的实施例中,结合第三方面或第三方面中第一种可能的实施例,所述处理器,还用于确定所述待发射信号的调制方式;获取所述待发射信号的调制方式对应的对消脉冲。
在第三种可能的实施例中,结合第三方面或第三方面中上述任一种可能的实施例,
所述处理器,还用于确定不同调制方式的待发射信号产生过冲脉冲的时间段以及所述过冲脉冲的时间段内各个时刻过冲脉冲的幅度;根据所述过冲脉冲的时间段、各个时刻过冲脉冲的幅度以及安全幅度,为不同调制方式的待发射信号设置相应的对消脉冲,所述安全幅度为不使所述末级功率放大器产生损坏时输出信号的最大幅度。
在第四种可能的实施例中,结合第三方面中第三种可能的实施例,
所述接收器,还用于接收任一调制方式的待发射信号;
所述处理器,还用于在预设时间段内的各个采样时刻对所述当前调制方式的待发射信号进行采样,得到各采样时刻的采样信号,所述预设时间段为所述当前调制方式的待发射信号产生过冲脉冲的时间段,所述当前调制方式为当前接收到的待发射信号的调制方式;通过所述各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及所述安全幅度,生成所述当前调制方式的待发射信号的对消脉冲;
所述存储器,还用于存储所述当前调制方式的待发射信号的对消脉冲。
在第五种可能的实施例中,结合第三方面中第四种可能的实施例,所述 处理器,还用于通过所述安全幅度以及各采样时刻对应的过冲脉冲的幅度,为每个采样信号生成比例系数(B(t)-A)/B(t),其中,t为采样时刻,B(t)为所述采样时刻t对应的过冲脉冲的幅度,A为所述安全幅度;将每个采样信号x(n,t)分别与各自的比例系数相乘,则每个采样信号变为x(n,t)·(B(t)-A)/B(t);将经过处理的采样信号进行合路之后再反相处理,得到所述当前调制方式的待发射信号的对消脉冲,所述对消脉冲为-x(n,t)·(B(t)-A)/B(t)。
本发明实施例提供的信号处理的方法及装置,将接收到的待发射信号与待发射信号的对消脉冲叠加,生成待放大信号,之后向放大电路发送待放大信号。与现有技术中由于不能及时对末级功率放大器采取保护措施,而导致末级功率放大器出现损坏的概率高相比,本发明在待发射信号进入功率放大器前,就使用对消脉冲将待发射信号的过冲脉冲消除,从而使得待放大信号在经过放大电路中的功率放大器放大后不会产生过冲脉冲,有效的保护了末级功率放大器,降低了末级功率放大器出现损坏的概率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为背景技术提供的末级功率放大器输出信号的示例性示意图;
图2为本发明实施例提供的一种信号处理的系统的逻辑结构示意图;
图3为本发明实施例提供的一种信号处理的方法的流程图;
图4为本发明实施例提供的另一种信号处理的方法的流程图;
图5为本发明实施例提供的另一种信号处理的方法的流程图;
图6为本发明实施例提供的另一种信号处理的方法的流程图;
图7为本发明实施例提供的信号处理系统中数字信号处理模块的逻辑结构示意图;
图8为本发明实施例提供的一种信号处理的装置的逻辑结构示意图;
图9为本发明实施例提供的另一种信号处理的装置的逻辑结构示意图;
图10为本发明实施例提供的另一种信号处理的装置的逻辑结构示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明实施例主要应用于基站的信号处理的系统中,如图2所示,该系统包括:数字信号处理模块201、放大电路202、耦合器203、天线204,其中放大电路202包括数模/模数转换器2021、第一至第N级功率放大器2022、末级功率放大器2023,其中,数字信号处理模块201为用于执行本发明实施例提供的信号处理的方法的模块。
数字信号处理模块201,用于接收待发射信号,调取待发射信号的对消脉冲,并在预设时间段内,将对消脉冲与待发射信号叠加,生成待放大信号。
其中,待发射信号与待放大信号均为数字信号,对消脉冲为用于抵消发射信号的过冲脉冲的对消脉冲。
放大电路202,用于对待放大信号进行放大,将经过放大的信号发送给天线204发射。
其中,放大电路202中的数模/模数转换器2021,用于将数字信号处理模块201生成的待放大信号转换为模拟信号。
第一至第N级功率放大器2022,用于将已转换为模拟信号的待放大信号进行逐级放大。
末级功率放大器2023,用于对已转换为模拟信号的待放大信号进行最后一级放大,并将经放大后输出的信号交由天线204进行发射。
值得说明的是,利用本发明实施例提供的信号处理的系统还可以为不同调制方式的待发射信号生成对消脉冲。
末级功率放大器2023,还用于对不同调制方式的待发射信号进行最后一级放大。
耦合器203,用于从末级功率放大器2023的输出部分耦合出一部分输出模拟信号。
数模/模数转换器2021,还用于将耦合器203耦合出的输出模拟信号转换为输出数字信号。
数字信号处理模块201,还用于通过输出数字信号确定待发射信号产生过冲脉冲的时间段,在该时间段内对输出数字信号进行采样,确定各采样时刻输出数字信号的幅度。
由于耦合器203耦合出的输出模拟信号与末级功率放大器2023输出的信号不是完全相同,而是有一定的比例关系,耦合器203耦合出的输出模拟信号相比于末级功率放大器2023输出的信号缩小了M倍,M为大于1的自然数,所以数字信号处理模块201确定各采样时刻的输出数字信号的幅度后,再将各采样时刻的输出数字信号的幅度分别乘以M即得到各个时刻过冲脉冲的幅度。
数字信号处理模块201,还用于对任一调制方式的待发射信号进行采样,得到采样信号,进而通过各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及安全幅度,生成当前调制方式的待发射信号的对消脉冲,并存储当前调制方式的待发射信号的对消脉冲。
可以理解的是,一个基站在不同的时间段内可以发射不同调制方式的待发射信号,所以在基站正常工作之前,数字信号处理模块需存储该基站能够发送的所有调制方式的待发射信号的对消脉冲。
结合图2所示的信号处理的系统,为了降低上述系统中的末级功率放大器出现损坏的概率,本发明实施例提供一种信号处理的方法,本发明实施例的执行主体为上述信号处理的系统中的数字信号处理模块,如图3所示,该方法包括:
301、接收待发射信号。
302、获取待发射信号的对消脉冲,对消脉冲用于抵消待发射信号的过冲脉冲。
其中,对消脉冲是事先存储在数字信号处理模块中的,在接收到待发射数字信号之后,数字信号处理模块即可调取到待发射数字信号的对消脉冲。
303、将对消脉冲与待发射信号叠加,生成待放大信号。
值得说明的是,数字信号处理模块获取到待发射信号的对消脉冲之后, 使待发射信号和待发射信号的对消脉冲进入数字信号处理模块的加法器,在加法器中对消脉冲与待发射信号会产生过冲脉冲的部分叠加,从而产生待放大信号。
304、向放大电路发送待放大信号。
可以理解的是,由于待放大信号是由待发射信号与对消脉冲叠加后生成的,所以待放大信号在通过放大电路的末级功率放大器之后不会产生过冲脉冲
结合图2所示的系统,在数字信号处理模块将对消脉冲与待发射信号叠加生成待放大信号之后,需将待放大信号交由数模/模数转换器,将待放大信号转换为模拟信号,再将该模拟信号经过第一至第N级功率放大器放大,之后再经过末级功率放大器的放大,由于过冲脉冲在待发射信号的数字域部分就已经被抵消,所以末级功率放大器的输出信号不会产生过冲脉冲,然后由天线发射末级功率放大器的输出信号。
本发明实施例提供的信号处理的方法,将接收到的待发射信号与待发射信号的对消脉冲叠加,生成待放大信号,之后向放大电路发送待放大信号。与现有技术中由于不能及时对末级功率放大器采取保护措施,而导致末级功率放大器出现损坏的概率高相比,本发明在待发射信号进入功率放大器前,就使用对消脉冲将待发射信号的过冲脉冲消除,从而使得待放大信号在经过放大电路中的功率放大器放大后不会产生过冲脉冲,有效的保护了末级功率放大器,降低了末级功率放大器出现损坏的概率。
结合图3所示的方法流程,为了使对消脉冲抵消待发射信号的过冲脉冲,在本发明实施例提供的另一种实现方式中,如图4所示,上述步骤302-303具体可以执行为下述步骤401-402。
401、在预设时刻之前,获取待发射信号的对消脉冲,预设时刻为待发射信号开始产生过冲脉冲的时刻。
需要说明的是,获取待发射信号的对消脉冲需要一定的时间,必须在待发射信号开始产生过冲脉冲之前获取到待发射信号的对消脉冲,才能使得对消脉冲与待发射信号的过冲脉冲抵消。
402、在预设时刻,将对消脉冲与待发射信号叠加,生成待放大信号。
可以理解的是,在待发射信号产生过冲脉冲的时刻将对消脉冲与待发射信号的过冲脉冲叠加,即可消除待发射信号的过冲脉冲。
本发明实施例提供的信号处理的方法,在待发射信号开始产生过冲之前,获取待发射信号的对消脉冲,在待发射信号产生过冲脉冲的时刻,将对消脉冲与待发射信号叠加,可以使得对消脉冲与待发射信号的过冲脉冲准确的叠加,从而消除过冲脉冲,减小了末级功率放大器出现损坏的概率。
结合上述实施例的描述,为了准确获取到待发射信号的对消脉冲,在本发明实施例的另一种实现方式中,如图5所示,上述步骤302具体可以实现为下述步骤3021-3022。
3021、确定待发射信号的调制方式。
其中,待发射信号的调制方式包括:ASK(Amplitude Shift Keying,振幅键控)、PSK(Phase-Shift Keying,相移键控)、FSK(Frequency-Shift Keying,频移键控)、QAM(Quadrature Amplitude Modulation,正交振幅调制)、MSK(Minimum Shift Keying,最小频移键控)、GMSK(Gaussian Filtered Minimum Shift Keying,高斯最小频移键控)、OFDM(Orthogonal Frequency Division Multiplexing,正交频分复用技术)。
需要说明的是,功率放大器对不同调制方式的待发射信号的响应不同,所以不同调制方式的待发射信号经末级功率放大器放大之后,产生的过冲脉冲也不同,为了消除过冲脉冲,需确定待发射信号的调制方式,以确定与待发射信号的调制方式对应的对消脉冲。
3022、获取待发射信号的调制方式对应的对消脉冲。
值得说明的是,上述步骤401中获取待发射信号的对消脉冲的方法具体也可以实现为步骤3021-3022。
本发明实施例提供的信号处理的方法,确定待发射信号的调制方式,获取待发射信号的调制方式对应的对消脉冲,进而将获取到的对消脉冲与待发射信号叠加,生成待放大信号。对于不同调制方式的待发射信号,与各自调制方式对应的对消脉冲叠加,可以更加准确的消除待发射信号过冲脉冲,且相比于现有技术中判断出末级功率放大器的输出功率超出安全幅度后才进行保护,本发明实施例在待发射信号进入功率放大器前就将待发射信号与对消 脉冲叠加,使得待发射信号经过末级功率放大器之后不会产生过冲脉冲,从而使得末级功率放大器的输出功率不会超出安全幅度,降低了末级功率放大器出现损坏的概率。
为了保证数字信号处理模块可以成功获取待发射信号调制方式对应的对消脉冲,需事先为每种调制方式的待发射信号生成对消脉冲,所以在本发明实施例提供的另一种实现方式中,如图6所示,在执行上述步骤301、接收待发射数字信号之前,还包括以下步骤601-605:
601、确定不同调制方式的待发射信号产生过冲脉冲的时间段以及过冲脉冲时间段内各个时刻过冲脉冲的幅度。
不同调制方式的待发射信号产生过冲脉冲的时间段以及过冲脉冲时间段内各个时刻过冲脉冲的幅度是通过测量末级功率放大器对不同调制方式的待发射信号的响应确定的,所以需将不同调制方式的待发射信号分别经过模数转换后,再经由基站中的多级功率放大器放大,通过检测末级功率放大器的输出信号,确定不同调制方式的待发射信号产生过冲脉冲的时间段以及各个时刻过冲脉冲的幅度。
确定每种调制方式的待发射信号过冲脉冲的幅度的具体方法为:在待发射信号经由基站中的第1至第N级功率放大器以及末级功率放大器的放大之后,耦合器从末级功率放大器的输出部分耦合出一部分输出模拟信号,在数模/模数转换器将输出模拟信号转换为输出数字信号之后,数字信号处理模块通过输出数字信号确定待发射信号产生过冲脉冲的时间段,在该时间段内对输出数字信号进行采样,确定各采样时刻输出数字信号的幅度,由于耦合器耦合出的输出模拟信号相比于末级功率放大器输出的信号缩小了M倍,所以将确定的各采样时刻的输出数字信号的幅度分别乘以M得到的结果即为各个时刻过冲脉冲的幅度。
其中,数字信号处理模块可以检测出输出数字信号产生过冲脉冲的时间段。例如产生过冲脉冲的时间段为输出数字信号的第0ns至第10ns,则确定待发射信号产生过冲脉冲的时间段为待发射信号的第0ns至第10ns。
值得说明的是,在上述步骤601中,确定每种调制方式的待发射信号产生过冲脉冲的时间段以及各个时刻过冲脉冲的幅度之后,数字信号处理模块 可以根据过冲脉冲的时间段、各个时刻过冲脉冲的幅度以及安全幅度,确定不同调制方式的待发射信号对应的对消脉冲,其中,安全幅度为不使所述末级功率放大器产生损坏时输出信号的最大幅度。
确定不同调制方式中任一调制方式的待发射信号对应的对消脉冲的方法可以实现为下述步骤602至604。
602、接收任一调制方式的待发射信号。
603、在预设时间段内的各采样时刻对当前调制方式的待发射信号进行采样,得到各采样时刻的采样信号。
其中,预设时间段为当前调制方式的待发射信号产生过冲脉冲的时间段,在本实施例中以待发射信号产生过冲脉冲的时间段为t1-t2进行说明。
当前调制方式为当前接收到的待发射信号的调制方式。
604、通过各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及安全幅度,生成当前调制方式的待发射信号的对消脉冲。
生成当前调制方式的待发射信号的对消脉冲的具体方法为:
通过安全幅度以及各采样时刻对应的过冲脉冲的幅度,为每个采样信号生成比例系数(B(t)-A)/B(t),其中,t为采样时刻,B(t)为采样时刻t对应的过冲脉冲的幅度,A为安全幅度。
将每个采样信号分别与各自的比例系数相乘,则每个采样信号变为x(n,t)·(B(t)-A)/B(t);
将经过处理的采样信号进行合路之后再反相处理,得到当前调制方式的待发射信号的对消脉冲,对消脉冲为-x(n,t)·(B(t)-A)/B(t)。
图2中的数字信号处理模块的逻辑结构示意图如图7所示,数字信号处理模块中包括时间判断模块、分配模块、至少两个CPG(Cancellation Pulse Generators,对消脉冲产生模块)、至少两个乘法器以及合路模块。
其中,时间判断模块连接于分配模块和多个乘法器,用于对待发射数字信号采样得到采样信号,并将采样信号分别发送给分配模块和乘法器。
分配模块与多个CPG相连,用于将不同采样时刻的采样信号分配给不同的CPG。
每个CPG连接于一个乘法器,用于根据接收到的采样信号生成该采样信 号的比例系数,并将比例系数发送给相应的乘法器。其中,CPG的数量与乘法器的数量相同。
乘法器,用于将从时间判断模块接收到的采样信号和从CPG接收到的该采样信号的比例系数相乘。
合路模块,与所有的乘法器相连,用于将所有乘法器输出的信号进行合路之后再反相处理,从而输出待发射信号的对消脉冲。
结合图6所示的生成对消脉冲的方法,在数字信号处理模块接收到当前调制方式的待发射信号x(n,t)之后,时间判断模块从接收到x(n,t)后的t1纳秒开始对x(n,t)进行采样,直至接收到x(n,t)后的t2纳秒结束采样,时间判断模块会将采样信号分别发送给分配模块以及乘法器。
之后,分配模块将t1-t2时间段内不同时刻的采样信号分配给不同的CPG进行处理,每个CPG通过接收到的采样信号确定采样时刻t,进而查找采样时刻t对应的过冲脉冲的幅度B(t),再通过安全幅度以及采样时刻对应的过冲脉冲的幅度,为接收到的采样信号生成比例系数(B(t)-A)/B(t)。
每个CPG会分别输出一个采样信号的比例系数,进而每个采样信号分别经过乘法器与各自对应的比例系数相乘,最后合路模块将经过处理的采样信号进行合路之后再反相处理,得到当前调制方式的待发射信号的对消脉冲,该对消脉冲为-x(n,t)·(B(t)-A)/B(t),t1-t2时间段内对消脉冲的幅度与待发射数字信号的幅度相同,相位相反。
605、存储当前调制方式的待发射信号的对消脉冲。
值得说明的是,每执行一次上述步骤602至605都可存储一种调制方式的待发射信号的对消脉冲,最终需存储基站可发射的每种调制方式的待发射信号的对消脉冲。
进一步的,在将每种调制方式的待发射信号的对消脉冲都存储之后,即可执行步骤301至304,将接收到的待发射信号与其对应的对消脉冲叠加,抵消待发射信号的过冲脉冲。
具体的,待发射数字信号x(n,t)在产生过冲脉冲的时间段t1-t2内与其对应的对消脉冲叠加得到y(n,t)=x(n,t)-x(n,t)·(B(t)-A)/B(t),然后将y(n,t)通过功率放大器进行放大,一般通过功率放大器之后的信号在数学上就是将 待发射信号乘以功率放大器的传递函数h(t),所以y(n,t)经过功率放大器之后输出的信号为y(n,t)·h(t)=x(n,t)·h(t)-x(n,t)·h(t)·(B(t)-A)/B(t),另外,x(n,t)通过功率放大器之后,功率放大器的输出信号为B(t)=x(n,t)·h(t),所以y(n,t)·h(t)=B(t)-(B(t)-A)=A,在现有技术中,功率放大器的输出信号在t1-t2内存在过冲脉冲,而本发明实施例将待发射信号与对消脉冲叠加后,输出信号在t1-t2内的幅度为A,不会对功率放大器造成损坏。
本发明实施例提供的信号处理的方法,确定不同调制方式的待发射信号产生过冲脉冲的时间段以及过冲脉冲的时间段内各个时刻过冲脉冲的幅度,然后在预设时间段内对当前调制方式的待发射信号进行采样,从而通过各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及安全幅度,确定当前调制方式的待发射信号的对消脉冲。由于对消脉冲是根据末级功率放大器对待发射信号的响应以及待发射信号自身的特性得到的,所以将待发射信号与对应的对消脉冲叠加可以较为准确的消除待发射信号的过冲脉冲,且事先存储不同调制方式的待发射信号的对消脉冲,在基站实际工作时可以较为快捷的调取待发射信号的对消脉冲,进而可以快捷的抵消待发射信号的过冲脉冲,降低了末级功率放大器出现损坏的概率。
结合上述图3至图6的说明,本发明实施例还提供一种信号处理的装置,如图8所示,该装置包括:接收单元801,获取单元802,叠加单元803,发送单元804。
接收单元801,用于接收待发射信号。
获取单元802,用于获取接收单元801接收到的待发射信号的对消脉冲,对消脉冲用于抵消待发射信号的过冲脉冲。
叠加单元803,用于将获取单元802获取到的对消脉冲与接收单元801接收到的待发射信号叠加,生成待放大信号。
发送单元804,用于向放大电路发送待放大信号。
进一步的,本发明实施例还提供一种信号处理的装置,如图9所示,该装置还包括:确定单元805;确定单元805包括接收子单元8051,采样子单元8052,生成子单元8053,存储子单元8054。
获取单元802,还用于在预设时刻之前,获取待发射信号的对消脉冲,预 设时刻为待发射信号开始产生过冲脉冲的时刻。
叠加单元803,还用于在预设时刻,将获取单元802获取的对消脉冲与待发射信号叠加,生成待放大信号。
获取单元802,还用于确定待发射信号的调制方式;获取待发射信号的调制方式对应的对消脉冲。
在接收单元801接收待发射信号之前,确定单元805,用于确定不同调制方式的待发射信号产生过冲脉冲的时间段以及过冲脉冲的时间段内各个时刻过冲脉冲的幅度;通过不同调制方式的待发射信号产生过冲脉冲的时间段、各个时刻过冲脉冲的幅度以及安全幅度,确定不同调制方式的待发射信号对应的对消脉冲。
其中,安全幅度为不使末级功率放大器产生损坏时输出信号的最大幅度。
接收子单元8051,用于接收任一调制方式的待发射信号。
采样子单元8052,用于在预设时间段内的各采样时刻对当前调制方式的待发射信号进行采样,得到各采样时刻的采样信号,预设时间段为当前调制方式的待发射信号产生过冲脉冲的时间段,当前调制方式为当前接收到的待发射信号的调制方式。
生成子单元8053,用于通过各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及安全幅度,生成当前调制方式的待发射信号的对消脉冲,安全幅度为不使末级功率放大器产生损坏时输出信号的最大幅度。
存储子单元8054,用于存储当前调制方式的待发射信号的对消脉冲。
最终,存储子单元8054可以存储不同调制方式的待发射信号的对消脉冲。
生成子单元8053,具体用于通过安全幅度以及各采样时刻对应的过冲脉冲的幅度,为每个采样信号生成比例系数(B(t)-A)/B(t),其中,t为采样时刻,B(t)为采样时刻t对应的过冲脉冲的幅度,A为安全幅度;将每个采样信号x(n,t)分别与各自的比例系数相乘,则每个采样信号变为x(n,t)·(B(t)-A)/B(t);将经过处理的采样信号进行合路之后再反相处理,得到当前调制方式的待发射信号的对消脉冲,对消脉冲为-x(n,t)·(B(t)-A)/B(t)。
本发明实施例提供的信号处理的装置,叠加单元将接收单元接收到的待 发射信号与获取单元获取的待发射信号的对消脉冲叠加,生成待放大信号,再向放大电路发送待放大信号。与现有技术中由于不能及时对末级功率放大器采取保护措施,而导致末级功率放大器出现损坏的概率高相比,本发明在待发射信号进入功率放大器前,就使用对消脉冲将待发射信号的过冲脉冲消除,从而使得待发射信号在经过功率放大器放大后不会产生过冲脉冲,有效的保护了末级功率放大器,降低了末级功率放大器出现损坏的概率。
本发明实施例还提供一种信号处理的装置,如图10所示,该装置为图3描述的数字信号处理模块的硬件结构示意图。其中,数字信号处理模块可包括存储器1001,处理器1002,接收器1003,发送器1004,总线1005。
存储器1001可以是ROM(Read Only Memory,只读存储器),静态存储设备,动态存储设备或者RAM(Random Access Memory,随机存取存储器)。存储器1001可以存储操作系统和其他应用程序。在通过软件或者固件来实现本发明实施例提供的技术方案时,用于实现本发明实施例提供的技术方案的程序代码保存在存储器1001中,并由处理器1002来执行。
接收器1003用于装置与其他设备或通信网络(例如但不限于以太网,RAN Radio Access Network,无线接入网),WLAN(Wireless Local Area Network,无线局域网)等)之间的通信。
处理器1002可以采用通用的中央处理器(Central Processing Unit,CPU),微处理器,应用专用集成电路(Application Specific Integrated Circuit,ASIC),或者一个或多个集成电路,用于执行相关程序,以实现本发明实施例所提供的技术方案。
总线1005可包括一通路,在装置各个部件(例如存储器1001、接收器1003、发送器1004和处理器1002)之间传送信息。
应注意,尽管图10所示的硬件仅仅示出了存储器1001、接收器1003、发送器1004和处理器1002以及总线1004,但是在具体实现过程中,本领域的技术人员应当明白,该终端还包含实现正常运行所必须的其他器件。同时,根据具体需要,本领域的技术人员应当明白,还可包含实现其他功能的硬件器件。
具体的,图10所示的数字信号处理模块用于实现图8-图9实施例所示的 装置时,该装置中的接收器1003,用于接收待发射信号。
处理器1002,与存储器1001、接收器1003和发送器1004耦合,用于控制程序指令的执行,具体用于获取待发射信号的对消脉冲,对消脉冲用于抵消待发射信号的过冲脉冲;将对消脉冲与待发射信号叠加,生成待放大信号。
发送器1004,用于向放大电路发送待放大信号。
处理器1002,还用于在预设时刻之前,获取待发射信号的对消脉冲,预设时刻为待发射信号开始产生过冲脉冲的时刻;在预设时刻,将对消脉冲与待发射信号叠加,生成待放大信号。
处理器1002,还用于确定待发射信号的调制方式;获取待发射信号的调制方式对应的对消脉冲。
处理器1002,还用于确定不同调制方式的待发射信号产生过冲脉冲的时间段以及过冲脉冲的时间段内各个时刻过冲脉冲的幅度;根据过冲脉冲的时间段、各个时刻过冲脉冲的幅度以及安全幅度,为不同调制方式的待发射信号设置相应的对消脉冲,安全幅度为不使末级功率放大器产生损坏时输出信号的最大幅度。
接收器1003,还用于接收任一调制方式的待发射信号。
处理器1002,还用于在预设时间段内的各个采样时刻对当前调制方式的待发射信号进行采样,得到各采样时刻的采样信号,预设时间段为当前调制方式的待发射信号产生过冲脉冲的时间段,当前调制方式为当前接收到的待发射信号的调制方式;通过各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及安全幅度,生成当前调制方式的待发射信号的对消脉冲。
存储器1001,还用于存储当前调制方式的待发射信号的对消脉冲。
处理器1002,还用于通过安全幅度以及各采样时刻对应的过冲脉冲的幅度,为每个采样信号生成比例系数(B(t)-A)/B(t),其中,t为采样时刻,B(t)为采样时刻t对应的过冲脉冲的幅度,A为安全幅度;将每个采样信号x(n,t)分别与各自的比例系数相乘,则每个采样信号变为x(n,t)·(B(t)-A)/B(t);将经过处理的采样信号进行合路之后再反相处理,得到当前调制方式的待发射信号的对消脉冲,对消脉冲为-x(n,t)·(B(t)-A)/B(t)。
本发明实施例提供的信号处理的装置,处理器将接收到的待发射信号与待发射信号的对消脉冲叠加,生成待放大信号,发送器向放大电路发送待放大信号。与现有技术中由于不能及时对末级功率放大器采取保护措施,而导致末级功率放大器出现损坏的概率高相比,本发明在待发射信号进入功率放大器前,就使用对消脉冲将待发射信号的过冲脉冲消除,从而使得待发射信号在经过末级功率放大器放大后不会产生过冲脉冲,有效的保护了末级功率放大器,降低了末级功率放大器出现损坏的概率。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,仅以上述各功能模块的划分进行举例说明,实际应用中,可以根据需要而将上述功能分配由不同的功能模块完成,即将装置的内部结构划分成不同的功能模块,以完成以上描述的全部或者部分功能。上述描述的系统,装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统,装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述模块或单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本 发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或处理器(processor)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。

Claims (18)

  1. 一种信号处理的方法,其特征在于,包括:
    接收待发射信号;
    获取所述待发射信号的对消脉冲,所述对消脉冲用于抵消所述待发射信号的过冲脉冲;
    将所述对消脉冲与所述待发射信号叠加,生成待放大信号;
    向放大电路发送所述待放大信号。
  2. 根据权利要求1所述的信号处理的方法,其特征在于,所述获取所述待发射信号的对消脉冲;将所述对消脉冲与所述待发射信号叠加,生成待放大信号,包括:
    在预设时刻之前,获取所述待发射信号的对消脉冲,所述预设时刻为所述待发射信号开始产生过冲脉冲的时刻;
    在所述预设时刻,将所述对消脉冲与所述待发射信号叠加,生成所述待放大信号。
  3. 根据权利要求1或2所述的信号处理的方法,其特征在于,所述获取所述待发射信号的对消脉冲,包括:
    确定所述待发射信号的调制方式;
    获取所述待发射信号的调制方式对应的对消脉冲。
  4. 根据权利要求1至3中任一项所述的信号处理的方法,其特征在于,在所述接收待发射信号之前,所述方法还包括:
    确定不同调制方式的待发射信号产生过冲脉冲的时间段以及所述过冲脉冲的时间段内各个时刻过冲脉冲的幅度;
    根据所述过冲脉冲的时间段、各个时刻过冲脉冲的幅度以及安全幅度,确定不同调制方式的待发射信号对应的对消脉冲,所述安全幅度为不使所述末级功率放大器产生损坏时输出信号的最大幅度。
  5. 根据权利要求4所述的信号处理的方法,其特征在于,所述确定不同调制方式中任一调制方式的待发射信号对应的对消脉冲,包括:
    接收所述任一调制方式的待发射信号;
    在预设时间段内的各采样时刻对当前调制方式的待发射信号进行采样,得 到各采样时刻的采样信号,所述预设时间段为所述当前调制方式的待发射信号产生过冲脉冲的时间段,所述当前调制方式为当前接收到的待发射信号的调制方式;
    通过所述各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及所述安全幅度,生成所述当前调制方式的待发射信号的对消脉冲;
    存储所述当前调制方式的待发射信号的对消脉冲。
  6. 根据权利要求5所述的信号处理的方法,其特征在于,所述通过所述各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及所述安全幅度,生成所述当前调制方式的待发射信号的对消脉冲,包括:
    通过所述安全幅度以及各采样时刻对应的过冲脉冲的幅度,为每个采样信号生成比例系数(B(t)-A)/B(t),其中,t为采样时刻,B(t)为所述采样时刻t对应的过冲脉冲的幅度,A为所述安全幅度;
    将每个采样信号x(n,t)分别与各自的比例系数相乘,则每个采样信号变为x(n,t)·(B(t)-A)/B(t);
    将经过处理的采样信号进行合路之后再反相处理,得到所述当前调制方式的待发射信号的对消脉冲,所述对消脉冲为-x(n,t)·(B(t)-A)/B(t)。
  7. 一种信号处理的装置,其特征在于,包括:
    接收单元,用于接收待发射信号;
    获取单元,用于获取所述接收单元接收到的所述待发射信号的对消脉冲,所述对消脉冲用于抵消所述待发射信号的过冲脉冲;
    叠加单元,将获取单元获取到的所述对消脉冲与所述接收单元接收到的所述待发射信号叠加,生成待放大信号;
    发送单元,用于向放大电路发送所述待放大信号。
  8. 根据权利要求7所述的信号处理的装置,其特征在于,
    所述获取单元,还用于在预设时刻之前,获取所述待发射信号的对消脉冲,所述预设时刻为所述待发射信号开始产生过冲脉冲的时刻;
    所述叠加单元,还用于在所述预设时刻,将所述获取单元获取的对消脉冲与所述待发射信号叠加,生成所述待放大信号。
  9. 根据权利要求7或8所述的信号处理的装置,其特征在于,
    所述获取单元,还用于确定所述待发射信号的调制方式;获取所述待发射信号的调制方式对应的对消脉冲。
  10. 根据权利要求7至9中任一项所述的信号处理的装置,其特征在于,所述装置还包括:确定单元;
    所述确定单元,用于确定不同调制方式的待发射信号产生过冲脉冲的时间段以及所述过冲脉冲的时间段内各个时刻过冲脉冲的幅度;通过不同调制方式的待发射信号产生过冲脉冲的时间段、各个时刻过冲脉冲的幅度以及安全幅度,确定不同调制方式的待发射信号对应的对消脉冲,所述安全幅度为不使所述末级功率放大器产生损坏时输出信号的最大幅度。
  11. 根据权利要求10所述的信号处理的装置,其特征在于,所述确定单元包括:接收子单元,采样子单元,生成子单元,存储子单元;
    所述接收子单元,还用于接收任一调制方式的待发射信号;
    所述采样子单元,用于在预设时间段内的各采样时刻对当前调制方式的待发射信号进行采样,得到各采样时刻的采样信号,所述预设时间段为所述当前调制方式的待发射信号产生过冲脉冲的时间段,所述当前调制方式为当前接收到的待发射信号的调制方式;
    所述生成子单元,用于通过所述各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及所述安全幅度,生成所述当前调制方式的待发射信号的对消脉冲;
    所述存储子单元,用于存储所述当前调制方式的待发射信号的对消脉冲。
  12. 根据权利要求11所述的信号处理的装置,其特征在于,
    所述生成子单元,具体用于通过所述安全幅度以及各采样时刻对应的过冲脉冲的幅度,为每个采样信号生成比例系数(B(t)-A)/B(t),其中,t为采样时刻,B(t)为所述采样时刻t对应的过冲脉冲的幅度,A为所述安全幅度;将每个采样信号x(n,t)分别与各自的比例系数相乘,则每个采样信号变为x(n,t)·(B(t)-A)/B(t);将经过处理的采样信号进行合路之后再反相处理,生成所述当前调制方式的待发射信号的对消脉冲,所述对消脉冲为-x(n,t)·(B(t)-A)/B(t)。
  13. 一种信号处理的装置,其特征在于,包括:
    存储器,用于存储包括程序指令的信息;
    接收器,用于接收待发射信号;
    处理器,与所述存储器耦合,用于控制所述程序指令的执行,具体用于获取所述待发射信号的对消脉冲,所述对消脉冲用于抵消所述待发射信号的过冲脉冲;将所述对消脉冲与所述待发射信号叠加,生成待放大信号;
    发送器,用于向放大电路发送所述待放大信号。
  14. 根据权利要求13所述的信号处理的装置,其特征在于,
    所述处理器,还用于在预设时刻之前,获取所述待发射信号的对消脉冲,所述预设时刻为所述待发射信号开始产生过冲脉冲的时刻;在所述预设时刻,将所述对消脉冲与所述待发射信号叠加,生成所述待放大信号。
  15. 根据权利要求13或14所述的信号处理的装置,其特征在于,
    所述处理器,还用于确定所述待发射信号的调制方式;获取所述待发射信号的调制方式对应的对消脉冲。
  16. 根据权利要求13至15中任一项所述的信号处理的装置,其特征在于,
    所述处理器,还用于确定不同调制方式的待发射信号产生过冲脉冲的时间段以及所述过冲脉冲的时间段内各个时刻过冲脉冲的幅度;根据所述过冲脉冲的时间段、各个时刻过冲脉冲的幅度以及安全幅度,为不同调制方式的待发射信号设置相应的对消脉冲,所述安全幅度为不使所述末级功率放大器产生损坏时输出信号的最大幅度。
  17. 根据权利要求16所述的信号处理的装置,其特征在于,
    所述接收器,还用于接收任一调制方式的待发射信号;
    所述处理器,还用于在预设时间段内的各个采样时刻对所述当前调制方式的待发射信号进行采样,得到各采样时刻的采样信号,所述预设时间段为所述当前调制方式的待发射信号产生过冲脉冲的时间段,所述当前调制方式为当前接收到的待发射信号的调制方式;通过所述各采样时刻的采样信号、各采样时刻对应的过冲脉冲的幅度以及所述安全幅度,生成所述当前调制方式的待发射信号的对消脉冲;
    所述存储器,还用于存储所述当前调制方式的待发射信号的对消脉冲。
  18. 根据权利要求17所述的信号处理的装置,其特征在于,
    所述处理器,还用于通过所述安全幅度以及各采样时刻对应的过冲脉冲的幅度,为每个采样信号生成比例系数(B(t)-A)/B(t),其中,t为采样时刻,B(t)为所述采样时刻t对应的过冲脉冲的幅度,A为所述安全幅度;将每个采样信号x(n,t)分别与各自的比例系数相乘,则每个采样信号变为x(n,t)·(B(t)-A)/B(t);将经过处理的采样信号进行合路之后再反相处理,得到所述当前调制方式的待发射信号的对消脉冲,所述对消脉冲为-x(n,t)·(B(t)-A)/B(t)。
PCT/CN2015/077706 2015-04-28 2015-04-28 一种信号处理的方法及装置 WO2016172860A1 (zh)

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WO2008004923A1 (en) * 2006-07-03 2008-01-10 Telefonaktiebolaget Lm Ericsson (Publ) Apparatuses and a method for reducing peak power in telecommunications systems
CN102223338A (zh) * 2010-04-15 2011-10-19 电信科学技术研究院 多载波系统的自适应削峰方法及装置
CN103457548A (zh) * 2012-06-01 2013-12-18 京信通信系统(中国)有限公司 射频电路功率放大器保护装置及发射机
CN103685097A (zh) * 2012-09-05 2014-03-26 京信通信系统(中国)有限公司 一种信号处理方法、装置及系统
CN203733021U (zh) * 2012-09-25 2014-07-23 英特尔公司 稳压器及包括稳压器的系统

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WO2008004923A1 (en) * 2006-07-03 2008-01-10 Telefonaktiebolaget Lm Ericsson (Publ) Apparatuses and a method for reducing peak power in telecommunications systems
CN102223338A (zh) * 2010-04-15 2011-10-19 电信科学技术研究院 多载波系统的自适应削峰方法及装置
CN103457548A (zh) * 2012-06-01 2013-12-18 京信通信系统(中国)有限公司 射频电路功率放大器保护装置及发射机
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