WO2017054528A1 - Procédé et appareil pour la détermination d'un signal de correction - Google Patents

Procédé et appareil pour la détermination d'un signal de correction Download PDF

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Publication number
WO2017054528A1
WO2017054528A1 PCT/CN2016/086580 CN2016086580W WO2017054528A1 WO 2017054528 A1 WO2017054528 A1 WO 2017054528A1 CN 2016086580 W CN2016086580 W CN 2016086580W WO 2017054528 A1 WO2017054528 A1 WO 2017054528A1
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Prior art keywords
signal
power
received power
rru
threshold
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PCT/CN2016/086580
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English (en)
Chinese (zh)
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易雄书
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华为技术有限公司
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Priority to JP2018516456A priority Critical patent/JP2018530254A/ja
Publication of WO2017054528A1 publication Critical patent/WO2017054528A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for determining a correction signal.
  • BF Beam Forming
  • SINR Signal to Interference plus Noise Ratio
  • the BF technology needs to ensure that the delay and phase of the transmitted signal arrive at each antenna port are the same, but the jitter of the first in first out (FIFO) memory in the IF part of the transceiver channel, the inconsistency of the response of the RF analog device, when not in progress
  • FIFO first in first out
  • the transceiver channel needs to be corrected to compensate the channel response difference of each transmit channel in the time domain and the frequency domain to obtain the BF array gain.
  • the prior art can implement the correction of the transceiver channel of a single radio remote unit (RRU), but there are still some problems in the joint correction process between the RRUs.
  • RRU radio remote unit
  • AGC Automatic Gain Control
  • ADC Analog-to-Digital Converter
  • AGC start control will cause a channel response change, which in turn affects the joint correction process of the transceiver channel. Therefore, how to realize the joint correction of the transmission and reception channels between the RRUs in the case that the AGC does not start the control is essential for realizing the joint correction of the transmission and reception channels between the RRUs.
  • the present invention provides a method and apparatus for determining a correction signal for obtaining a correction signal for joint correction of a transmission and reception channel between RRUs.
  • a method for determining a correction signal includes:
  • the baseband unit BBU obtains the first received power, and the first received power is the power when the first radio remote unit RRU receives the first signal transmitted by the second RRU;
  • the BBU adjusts the first signal to obtain the second signal, and determines the second received power according to the second signal;
  • the second received power is the second RRU receives the second The power of the signal, the comparison result of the second received power and the power threshold meets a preset condition;
  • the BBU uses the second signal as a correction signal, and the correction signal is used for joint correction of the first RRU and the second RRU for transmitting and receiving channels.
  • the BBU adjusts the first signal to obtain the second signal, including:
  • the BBU multiplies the first signal S(k) by the frequency domain.
  • the BBU multiplies the first signal S(n) by the time domain.
  • Delta represents the digital power control coefficient
  • Delta satisfies Delta f(y-x)+A
  • f() represents the up-rounding function
  • y represents the first received power
  • x represents the first power threshold
  • A is a constant.
  • the BBU adjusts the first signal to obtain the second signal, including:
  • the BBU shifts the first signal to the right in the time domain or the frequency domain to obtain a second signal, and the second received power corresponding to the second signal is smaller than the first The power threshold, the first signal is shifted by one bit to the right, and the second received power is reduced by 6 dB with respect to the first received power.
  • the first power threshold is set according to the input antenna power of the first RRU.
  • the BBU adjusts the first signal to obtain the second signal, including:
  • the BBU When the first received power is less than or equal to the second power threshold, the BBU intermittently places the subcarriers of the first signal to obtain a second signal, where the second received power corresponding to the second signal is greater than the third power threshold, and the second received power is The power when the first RRU receives the subcarrier of the second signal.
  • the BBU adjusts the first signal to obtain the second signal, including:
  • the BBU shifts the first signal to the left in the time domain or the frequency domain to obtain a second signal, and the second received power corresponding to the second signal is greater than the second power threshold.
  • the first signal is shifted by one bit to the left, and the second received power is increased by 6 dB with respect to the first received power.
  • the second power threshold is set according to signal noise power.
  • a second aspect of the present invention provides a calibration signal determining apparatus, including:
  • a transceiver unit configured to acquire a first received power, where the first received power is a power when the first radio remote unit RRU receives the first signal sent by the second RRU;
  • a processing unit configured to: when the comparison result of the first received power and the power threshold determined by the transceiver unit does not satisfy the preset condition, adjust the first signal to obtain the second signal, and determine the second received power according to the second signal;
  • the power is the power when the first RRU receives the second signal, the comparison result of the second received power and the power threshold meets the preset condition; the second signal is used as the correction signal, and the correction signal is used for the first RRU and the second RRU to transmit and receive channels Joint correction.
  • Multiplying the first signal S(k) in the frequency domain when the first received power is greater than or equal to the first power threshold Obtaining a second signal, where a second received power corresponding to the second signal is smaller than a first power threshold, and k represents a frequency domain subcarrier sequence number of the first signal; or
  • Multiplying the first signal S(n) in the time domain when the first received power is greater than or equal to the first power threshold Obtaining a second signal, where a second received power corresponding to the second signal is less than a first power threshold, and n represents a time domain sample sequence number of the first signal;
  • Delta represents the digital power control coefficient
  • Delta satisfies Delta f(y-x)+A
  • f() represents the up-rounding function
  • y represents the first received power
  • x represents the first power threshold
  • A is a constant.
  • the processing unit when the comparison result of the first received power and the power threshold does not satisfy the preset condition, when the processing unit adjusts the first signal to obtain the second signal, the processing unit is specifically configured to:
  • the first signal When the first received power is greater than or equal to the first power threshold, the first signal is shifted to the right in the time domain or the frequency domain to obtain a second signal, and the second received power corresponding to the second signal is smaller than the first power threshold.
  • the first signal is shifted by one bit to the right, and the second received power is reduced by 6 dB with respect to the first received power.
  • the first power threshold is set according to the input antenna power of the first RRU.
  • the subcarriers of the first signal are intermittently placed to obtain a second signal, and the second received power corresponding to the second signal is greater than a third power threshold, and the second received power is The power at which an RRU receives the subcarriers of the second signal.
  • the first signal When the first received power is less than or equal to the second power threshold, the first signal is shifted to the left in the time domain or the frequency domain to obtain a second signal, and the second received power corresponding to the second signal is greater than the second power threshold.
  • the first signal is shifted by one bit to the left, and the second received power is increased by 6 dB with respect to the first received power.
  • the second power threshold is set according to signal noise power.
  • the BBU obtains the first received power from the first RRU, and the first received power is the power when the first RRU receives the first signal sent by the second RRU; when the comparison between the first received power and the power threshold is not When the preset condition is met, the BBU adjusts the first signal to obtain the second signal, and determines the second received power according to the second signal; the second received power is the power when the first RRU receives the second signal, and the second received power and power threshold The comparison result satisfies the preset condition; the BBU uses the second signal as a correction signal, and the correction signal is used for joint correction of the first RRU and the second RRU for transmitting and receiving channels.
  • the correction signal obtained by adjusting the transmission signal of the BBU satisfies the preset condition, the channel response change caused by the AGC start control triggered by the excessive correction signal can be avoided, and the correction signal can be used to jointly correct the transmission and reception channels between the RRUs. Therefore, according to the technical solution provided by the embodiment of the present invention, the joint correction of the transceiver channel between the RRUs can still be implemented without the AGC starting control.
  • FIG. 1 is a schematic diagram of a double-split RRU scenario according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a method for determining a correction signal according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for jointly adjusting a transceiver channel between RRUs according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a calibration signal determining apparatus according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a calibration signal determining apparatus according to an embodiment of the present invention.
  • the embodiment of the invention provides a method and a device for determining a correction signal, which are used to obtain a correction signal for joint correction of a transmission and reception channel between RRUs, and further use the correction signal to perform joint correction of the transmission and reception channels between RRUs.
  • the method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.
  • the technical solution provided by the embodiment of the present invention relates to a joint-correction technology for receiving and transmitting channels between RRUs, and the channel-response difference of each transceiver channel of the RRU can be compensated in the time domain and the frequency domain by the joint-correction technology of the transceiver channels between the RRUs.
  • the distributed base station equipment is mainly divided into two parts: a baseband unit (BBU) and an RRU.
  • the technical feature of the BBU+RRU is to divide the base station into a near-end machine, that is, a wireless baseband control (Radio Server) and a remote unit, that is, a radio remote. (RRU) two parts, one BBU can support multiple RRUs, and the BBU and RRU are generally connected by optical fiber, and the interface is open.
  • the RRU0 and RRU1 transceiver channels include TX0, RX0, TX1, and RX1, where TX is a Transmitter and RX is a Receiver.
  • RRU0 can implement its own transceiver channel correction
  • RRU1 can also implement its own transceiver channel correction.
  • RRU0 and RRU1 have independent correction reference channels, the channel responses of the two calibration reference channels are not equal.
  • the four transceiver channels of RRU0 and RRU1 cannot achieve the delay and phase consistency on the air interface, and thus the joint correction between the RRU0 and RRU1 cannot be achieved.
  • the technical solution provided by the embodiment of the present invention can obtain a correction signal, and further perform joint correction of the transmission and reception channels between the RRUs through the obtained correction signal.
  • an embodiment of the present invention provides a method for determining a correction signal, including:
  • the BBU obtains a first received power from the first RRU, where the first received power is a power when the first RRU receives the first signal sent by the second RRU.
  • the BBU adjusts the first signal to obtain the second signal, and determines the second received power according to the second signal.
  • the second received power is the first RRU. The power when receiving the second signal, the comparison result of the second received power and the power threshold satisfies a preset condition;
  • the BBU uses the second signal as a correction signal, and the correction signal is used for joint correction of the transceiver channel between the first RRU and the second RRU.
  • the method for the BBU to determine the channel estimation hc1 of the first RRU includes:
  • the BBU controls the reference price reference channel of the first RRU to be in the received signal state, and the second RRU transmits a signal to the first RRU (the signal corresponds to the first signal in FIG. 2), and the second RRU corresponding correction is obtained by the method shown in FIG.
  • the signal determines a channel estimate hc1, hc1 of the first RRU, which is a channel estimate when the first RRU receives the correction signal transmitted by the second RRU through the reference channel.
  • the method for the BBU to determine the channel estimate hc2 of the second RRU is the same as the method for the BBU to determine the channel estimate hc1 of the first RRU, except that the first RRU is exchanged with the second RRU in the method for determining the channel estimate hc1 of the first RRU by the BBU.
  • the first RRU is exchanged with the second RRU in the method for determining the channel estimate hc1 of the first RRU by the BBU.
  • the BBU controls the reference price reference channel of the second RRU to be in a received signal state, the first RRU transmits a signal to the second RRU (the signal corresponds to the first signal in FIG. 2), and the signal transmitted by the first RRU may be transmitted with the second RRU.
  • the signals are the same or different, and the correction signal corresponding to the first RRU is obtained by the method shown in FIG. 2, and then the channel estimation hc2 of the second RRU is determined, and hc2 is when the second RRU receives the correction signal of the first RRU transmission through the reference channel.
  • Channel estimation is the method for the base station.
  • the method for the BBU to adjust the first signal to obtain the second signal may include the following:
  • the BBU needs to adjust the first signal to adjust the first received power, so that the adjustment is obtained.
  • the second received power is smaller than the first power threshold, and the first power threshold may be set according to the input antenna power of the first RRU, and the AGC start control may be caused when the received power is greater than or equal to the first power threshold.
  • the method for the BBU to adjust the first signal to obtain the second signal may include the following:
  • Method 1 The BBU multiplies the first signal S(k) by the frequency domain. Obtaining a second signal, where the second received power corresponding to the second signal is less than the first power threshold.
  • k represents the frequency domain subcarrier number of the first signal
  • Delta represents the digital power control coefficient
  • f() represents the up-rounding function
  • y represents the first received power
  • x represents The first power threshold
  • A is a constant.
  • A can be flexibly set. Since the first receiving power is relatively large, the AGC start control is triggered to avoid signal distortion caused by ADC saturation, but the AGC start control causes a channel response change. In this embodiment, the value of A is set to avoid triggering the AGC start control.
  • the first power threshold corresponding to the first signal is -30 dBm
  • the first received power is -20 dBm
  • the value of A is 6 dB
  • the first received power is attenuated by 16 dB.
  • Method 2 The BBU multiplies the first signal S(n) by the time domain. Obtaining a second signal, where the second received power corresponding to the second signal is less than the first power threshold.
  • n represents the time domain sample number of the first signal
  • Delta represents the digital power control coefficient
  • f() represents the up-rounding function
  • y represents the first received power
  • x Indicates the first power threshold
  • A is a constant, and the value of A can be set according to the condition to avoid triggering the AGC start control.
  • Method 3 The purpose of adjusting the first received power is achieved by performing frequency domain shift on the first signal by time domain shift. Specifically, the BBU shifts the first signal to the right in the time domain or the frequency domain to obtain a second signal, where the second received power corresponding to the second signal is smaller than the first power threshold, and the first signal is shifted by one bit to the right. The second received power is reduced by 6 dB with respect to the first received power.
  • the time domain shift can better guarantee the accuracy of the phase with respect to the frequency domain shift.
  • the first signal is shifted by one bit to the right, and the second received power is reduced by 6 dB with respect to the first received power.
  • the first signal is shifted by two bits to the right, and the second received power is relative to the first.
  • Receive power is reduced by 12dB, and so on.
  • the first power threshold is -30 dBm
  • the first received power is -20 dBm
  • the difference between the first received power and the first power threshold is equal to 10 dBm, and is rounded up to an integer multiple of 6 dBm, that is, the difference needs to be adjusted to 12 dBm. Therefore, the second received power needs to be reduced by 12 dBm with respect to the first received power, that is, the first signal is shifted to the right by two bits in the time domain or the frequency domain.
  • the BBU needs to adjust the first received power to adjust the first received power, so that the adjusted second received power is greater than The second power threshold, the second power threshold can be set according to the signal noise power.
  • the method for the BBU to adjust the first signal to obtain the second signal is as follows:
  • the BBU shifts the first signal to the left in the time domain or the frequency domain to obtain a second signal, where the second received power corresponding to the second signal is greater than the second power threshold, and the first signal is shifted to the left by one bit, and the second signal
  • the received power is increased by 6 dB with respect to the first received power.
  • the first signal is shifted by one bit to the left, and the second received power is increased by 6 dB with respect to the first received power.
  • the first signal is shifted by two bits to the left, and the second received power is relative to the first.
  • a receive power is increased by 12 dB, and so on.
  • the first power threshold is -30 dBm
  • the first received power is -35 dBm
  • the difference between the first power threshold and the first received power is equal to 5 dBm, and is rounded up to an integer multiple of 6 dBm, that is, the difference needs to be adjusted to 6 dBm. Therefore, the second received power needs to be increased by 6 dBm with respect to the first received power, that is, the first signal is shifted to the right by one bit in the time domain or the frequency domain.
  • the BBU needs to adjust the first received power to adjust the first received power, so that the adjusted second received power is greater than The third power threshold, where the second received power is the power when the first RRU receives the subcarrier of the second signal.
  • the method for the BBU to adjust the first signal to obtain the second signal is as follows:
  • the signal strength of each subcarrier of the first signal is increased by frequency division.
  • the BBU interleaves the subcarriers of the first signal to obtain a second signal, where the second received power corresponding to the second signal is greater than the third power threshold, and the second received power is the power when the first RRU receives the subcarrier of the second signal.
  • the first signal when the first signal is equivalent to the noise power, such as -97dBm@20MHz bandwidth (the noise figure is calculated by 4dB), if the first received power is less than or equal to the second power threshold, the first signal needs to be amplified, in order to avoid If the power amplifier is burned, it is still necessary to ensure that the total power does not change in an Orthogonal Frequency Division Multiple Access (OFDMA) symbol. Therefore, the method of spacing the subcarriers of the first signal can be used only to improve the The power of each subcarrier of a signal.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • the subcarrier label k of the first signal is continuous, and the subcarrier of the first signal is placed at a position of 2k to obtain a second signal, and the second received power is increased by 3 dBm with respect to the first received power; similarly, The subcarrier of the first signal is placed at a position of 4k to obtain a second signal, the second received power is increased by 6 dBm with respect to the first received power, and so on.
  • k denotes a time domain sample label within one OFDM symbol
  • k in the frequency domain denotes a subcarrier label within one OFDM symbol.
  • the power A of the first RR transmitting the first signal for the first time satisfies the following conditions:
  • x represents the antenna gain and T represents the power threshold of the RRU's receive channel corruption, ie When the received power of the RRU receiving the first signal is greater than T, the receiving channel of the first RRU is damaged;
  • the second RRU may be used to reduce the rated transmit power by using the second RRU to adjust the first signal to obtain the second signal, so as to avoid excessive power transmission of the first signal by the second RRU.
  • the receiving channel of the first RRU is damaged.
  • Adjusting the received power by adjusting the transmit signal so that the received power meets the preset condition, and avoids the AGC start control.
  • the adjusted signal can be used as a correction signal for joint correction of the transceiver channel between the RRUs.
  • the joint correction process of the transceiver channel between RRUs is as follows:
  • the first RRU and the second RRU respectively perform respective transceiver channel corrections, and respectively obtain respective correction coefficients.
  • the correction factor of the first RRU includes with a correction factor indicating the ith transmission channel of the first RRU, a correction coefficient indicating an ith receiving channel of the first RRU; a correction coefficient of the second RRU includes with a correction factor indicating the ith transmission channel of the second RRU, A correction coefficient indicating the ith receiving channel of the second RRU.
  • the RCU's respective transceiver channel correction process is prior art and will not be described here.
  • the BBU controls the reference price reference channel of the first RRU to be in a received signal state, and the BBU controls the second RRU to use the reference reference channel to transmit the first signal to the first RRU at a rated power.
  • the BBU obtains a first received power from the first RRU, where the first received power is a power when the first RRU receives the first signal sent by the second RRU.
  • the BBU determines whether the comparison result of the first received power and the power threshold meets a preset condition.
  • S305 is performed. Specifically, when the first received power is greater than or equal to the first power threshold, S305 is performed; or when the first received power is less than or equal to the second power threshold, S305 is performed.
  • S306 is performed. Specifically, when the first received power is less than the first power threshold and the first received power is greater than the second power threshold, S306 is performed.
  • the BBU adjusts the first signal to obtain a second signal, and determines a second received power according to the second signal, and uses the second signal as a correction signal that is sent by the second RRU.
  • the second received power is the power when the first RRU receives the second signal, and the comparison result of the second received power and the power threshold satisfies a preset condition.
  • the method for the BBU to adjust the first signal to obtain the second signal and determine the second received power according to the second signal is as described above in the embodiment, and details are not described herein again.
  • the BBU uses the first signal as a correction signal that is sent by the second RRU.
  • the BBU controls the first RRU to receive the correction signal of the second RRU transmission by referring to the reference channel, and calculates the channel estimation hc1 of the first RRU at this time;
  • the channel estimate hc1 of the first RRU is equal to versus Product of Indicates the channel response of the receiving channel of the first RRU, Indicates the channel response of the transmit channel of the first RRU.
  • the BBU controls the reference price reference channel of the second RRU to be in a received signal state, and the BBU controls the first RRU to use the reference reference channel to transmit the first signal to the second RRU by using the rated power.
  • the BBU acquires a first received power from a second RRU, where the first received power is a power when the second RRU receives the first signal sent by the first RRU.
  • the BBU determines whether the comparison result of the first received power (corresponding to the second RRU) and the power threshold meets a preset condition.
  • S311 is performed. Specifically, when the first received power is greater than or equal to the first power threshold, S311 is performed; or when the first received power is less than or equal to the second power threshold, S311 is performed.
  • S312 is performed. Specifically, when the first received power is less than the first power threshold and the first received power is greater than the second power threshold, S312 is performed.
  • the BBU adjusts the first signal to obtain a second signal, and determines a second received power according to the second signal, and uses the second signal as a correction signal that is sent by the first RRU;
  • the second received power is the power when the second RRU receives the second signal, and the comparison result of the second received power and the power threshold satisfies a preset condition.
  • the method for the BBU to adjust the first signal to obtain the second signal and determine the second received power according to the second signal is as described above in the embodiment, and details are not described herein again.
  • the BBU uses the first signal as a correction signal that is sent by the first RRU.
  • the BBU controls the second RRU to receive the correction signal of the first RRU transmission by using the reference reference channel, and calculates the channel estimation hc2 of the second RRU at this time;
  • the channel estimate hc2 of the second RRU is equal to versus Product of Indicates the channel response of the receiving channel of the second RRU, Indicates the channel response of the transmit channel of the second RRU.
  • the BBU updates the correction coefficient of the first RRU by using the mutual correction coefficient rc, and the correction coefficient of the second RRU remains unchanged; or the BBU updates the correction coefficient of the second RRU by using the mutual correction coefficient rc, and the correction coefficient of the first RRU remains unchanged. change.
  • the correction coefficient of the second RRU remains unchanged, and the correction coefficient of the updated ith transmission channel of the first RRU Meet the following formula:
  • the BBU obtains the first received power from the first RRU, and the first received power is the power when the first RRU receives the first signal sent by the second RRU; when the comparison between the first received power and the power threshold is not When the preset condition is met, the BBU adjusts the first signal to obtain the second signal, and determines the second received power according to the second signal; the second received power is the power when the first RRU receives the second signal, and the second received power and power threshold The comparison result satisfies the preset condition; the BBU uses the second signal as a correction signal, and the correction signal is used for joint correction of the first RRU and the second RRU for transmitting and receiving channels.
  • the correction signal obtained by adjusting the transmission signal of the BBU satisfies the preset condition, the channel response change caused by the AGC start control triggered by the excessive correction signal can be avoided, and the correction signal can be used to jointly correct the transmission and reception channels between the RRUs. Therefore, according to the technical solution provided by the embodiment of the present invention, the joint correction of the transceiver channel between the RRUs can still be implemented without the AGC starting control.
  • the present invention further provides a correction signal determining apparatus, which may adopt the method provided by the embodiment corresponding to FIG. 2, as shown in FIG. 4, the apparatus 400 includes a transceiver unit 401 and a processing unit 402.
  • the transceiver unit 401 is configured to acquire a first received power, where the first received power is a power when the first remote radio unit RRU receives the first signal sent by the second RRU;
  • the processing unit 402 is configured to: when the comparison result of the first received power and the power threshold determined by the transceiver unit 401 does not satisfy the preset condition, adjust the first signal to obtain the second signal, and determine the second received power according to the second signal;
  • the received power is the power when the first RRU receives the second signal, and the second connection
  • the comparison result between the received power and the power threshold satisfies a preset condition;
  • the second signal is used as a correction signal, and the correction signal is used for joint correction of the first RRU and the second RRU for transmitting and receiving channels.
  • the processing unit 402 when the comparison result of the first received power and the power threshold does not satisfy the preset condition, when the first signal is obtained by the processing unit 402, the processing unit 402 is specifically configured to:
  • Multiplying the first signal S(k) in the frequency domain when the first received power is greater than or equal to the first power threshold Obtaining a second signal, where a second received power corresponding to the second signal is smaller than a first power threshold, and k represents a frequency domain subcarrier sequence number of the first signal; or
  • Multiplying the first signal S(n) in the time domain when the first received power is greater than or equal to the first power threshold Obtaining a second signal, where a second received power corresponding to the second signal is less than a first power threshold, and n represents a time domain sample sequence number of the first signal;
  • Delta represents the digital power control coefficient
  • Delta satisfies Delta f(y-x)+A
  • f() represents the up-rounding function
  • y represents the first received power
  • x represents the first power threshold
  • A is a constant.
  • the processing unit 402 when the comparison result of the first received power and the power threshold does not satisfy the preset condition, when the first signal is obtained by the processing unit 402, the processing unit 402 is specifically configured to:
  • the first signal When the first received power is greater than or equal to the first power threshold, the first signal is shifted to the right in the time domain or the frequency domain to obtain a second signal, and the second received power corresponding to the second signal is smaller than the first power threshold.
  • the first signal is shifted by one bit to the right, and the second received power is reduced by 6 dB with respect to the first received power.
  • the first power threshold is set according to the input antenna power of the first RRU.
  • the processing unit 402 adjusts the first signal to obtain the second signal, specifically:
  • the subcarriers of the first signal are intermittently placed to obtain a second signal, and the second received power corresponding to the second signal is greater than a third power threshold, and the second received power is The power when an RRU receives the subcarriers of the second signal.
  • the processing unit 402 adjusts the first signal to obtain the second signal, specifically:
  • the first signal When the first received power is less than or equal to the second power threshold, the first signal is shifted to the left in the time domain or the frequency domain to obtain a second signal, and the second received power corresponding to the second signal is greater than the second power threshold.
  • the first signal is shifted by one bit to the left, and the second received power is increased by 6 dB with respect to the first received power.
  • the second power threshold is set according to signal noise power.
  • each functional unit in each embodiment of the present application 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.
  • An integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, can be stored in a computer readable storage medium.
  • the technical solution of the present application in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the various embodiments of the present application.
  • 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. .
  • the present invention also provides a correction signal determining apparatus, which may employ the method provided by the embodiment corresponding to FIG. 2, and may be the same device as the apparatus shown in FIG.
  • the apparatus 500 includes a transceiver 501, a processor 502, a bus 503, and a memory 504, wherein:
  • the transceiver 501, the processor 502, and the memory 504 are connected to each other through a bus 503.
  • the bus 503 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. Wait.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, Figure 5 Only one thick line is used, but it does not mean that there is only one bus or one type of bus.
  • the transceiver 501 is configured to acquire a first received power, where the first received power is a power when the first remote radio unit RRU receives the first signal sent by the second RRU;
  • the processor 502 is configured to: when the comparison result of the first received power and the power threshold determined by the transceiver 501 does not satisfy the preset condition, adjust the first signal to obtain the second signal, and determine the second received power according to the second signal;
  • the received power is the power when the first RRU receives the second signal, and the comparison result of the second received power and the power threshold satisfies a preset condition;
  • the second signal is used as a correction signal, and the correction signal is used for the first RRU and the second RRU.
  • the transceiver channel is jointly corrected.
  • the processor 502 when the comparison result of the first received power and the power threshold does not satisfy the preset condition, when the processor 502 adjusts the first signal to obtain the second signal, the processor 502 is specifically configured to:
  • Multiplying the first signal S(k) in the frequency domain when the first received power is greater than or equal to the first power threshold Obtaining a second signal, where a second received power corresponding to the second signal is smaller than a first power threshold, and k represents a frequency domain subcarrier sequence number of the first signal; or
  • Multiplying the first signal S(n) in the time domain when the first received power is greater than or equal to the first power threshold Obtaining a second signal, where a second received power corresponding to the second signal is less than a first power threshold, and n represents a time domain sample sequence number of the first signal;
  • Delta represents the digital power control coefficient
  • Delta satisfies Delta f(y-x)+A
  • f() represents the up-rounding function
  • y represents the first received power
  • x represents the first power threshold
  • A is a constant.
  • the processor 502 when the comparison result of the first received power and the power threshold does not satisfy the preset condition, when the processor 502 adjusts the first signal to obtain the second signal, the processor 502 is specifically configured to:
  • the first signal When the first received power is greater than or equal to the first power threshold, the first signal is shifted to the right in the time domain or the frequency domain to obtain a second signal, and the second received power corresponding to the second signal is smaller than the first power threshold.
  • the first signal is shifted by one bit to the right, and the second received power is reduced by 6 dB with respect to the first received power.
  • the first power threshold is set according to the input antenna power of the first RRU.
  • the processor when the comparison result between the first received power and the power threshold does not satisfy the condition, the processor When the 502 adjusts the first signal to obtain the second signal, it is specifically used to:
  • the subcarriers of the first signal are intermittently placed to obtain a second signal, and the second received power corresponding to the second signal is greater than a third power threshold, and the second received power is The power when an RRU receives the subcarriers of the second signal.
  • the processor 502 adjusts the first signal to obtain the second signal, specifically:
  • the first signal When the first received power is less than or equal to the second power threshold, the first signal is shifted to the left in the time domain or the frequency domain to obtain a second signal, and the second received power corresponding to the second signal is greater than the second power threshold.
  • the first signal is shifted by one bit to the left, and the second received power is increased by 6 dB with respect to the first received power.
  • the second power threshold is set according to signal noise power.
  • the apparatus 500 also includes a memory 504 for storing programs and the like.
  • the program can include program code, the program code including computer operating instructions.
  • the memory 504 may include a random access memory (RAM), and may also include a non-volatile memory such as at least one disk storage.
  • the processor 502 executes an application stored in the memory 504 to implement the above-described correction signal determining method.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the instruction device implements the functions specified in one or more blocks of the flowchart or in a flow or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil permettant de déterminer un signal de correction, et servant à obtenir un signal de correction pour la correction conjointe de canaux d'émission et de réception entre unités radio distantes (RRU). Le procédé comprend les étapes suivantes : une unité de bande de base (BBU) obtient d'une première RRU une première puissance de réception, la première puissance de réception étant la puissance existant au moment où la première RRU reçoit un premier signal émis par une deuxième RRU ; lorsque le résultat d'une comparaison entre la première puissance de réception et un seuil de puissance ne satisfait pas à une condition prédéfinie, la BBU règle le premier signal pour obtenir un deuxième signal, puis détermine, à partir du deuxième signal, une deuxième puissance de réception ; la deuxième puissance de réception est la puissance existant au moment où la première RRU reçoit le deuxième signal, et où le résultat d'une comparaison entre la deuxième puissance de réception et le seuil de puissance satisfait à la condition prédéfinie ; la BBU prend le deuxième signal comme signal de correction, lequel est utilisé pour la correction conjointe de canaux d'émission et de réception entre la première RRU et la deuxième RRU.
PCT/CN2016/086580 2015-09-30 2016-06-21 Procédé et appareil pour la détermination d'un signal de correction WO2017054528A1 (fr)

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CN201510641645.8A CN106559150A (zh) 2015-09-30 2015-09-30 一种校正信号确定方法及装置

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CN103595665A (zh) * 2012-08-14 2014-02-19 华为技术有限公司 通道校正方法、装置及无线接入系统
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CN103595665A (zh) * 2012-08-14 2014-02-19 华为技术有限公司 通道校正方法、装置及无线接入系统
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