CN114760683A - Method and device suitable for 5G ORAN downlink phase compensation - Google Patents

Method and device suitable for 5G ORAN downlink phase compensation Download PDF

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CN114760683A
CN114760683A CN202210431901.0A CN202210431901A CN114760683A CN 114760683 A CN114760683 A CN 114760683A CN 202210431901 A CN202210431901 A CN 202210431901A CN 114760683 A CN114760683 A CN 114760683A
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phase compensation
data
ofdm
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ofdm symbol
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CN114760683B (en
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邓民辉
钟海辉
蒋毅
刘胜强
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Super Communications Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2666—Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention discloses a method suitable for 5G ORAN downlink phase compensation, which comprises the following steps: calculating the IQ data to compensate the phase in a down-conversion frequency domain, calculating a parameter to be compensated for the phase corresponding to each OFDM symbol in a frame of data under a currently configured frequency point through Cortex A53, determining each OFDM symbol and the parameter calculated by phase compensation through a control signal related to OFDM, obtaining new IQ data through phase compensation, and outputting corresponding data. The method for realizing the phase compensation of the 5G radio remote unit in the downlink is realized in a simpler and more flexible way through the online configuration of the compensation parameters, so that the method can be quickly realized in engineering. The invention also provides a device for compensating the downlink phase of the 5G ORAN.

Description

Method and device suitable for 5G ORAN downlink phase compensation
Technical Field
The invention relates to the field of communication networks, in particular to a method and a device suitable for 5G ORAN downlink phase compensation.
Background
According to the relevant protocol of 3GPP, OFDM signals other than PARCH channels are up-converted to f after being shaped0Phase compensation is needed before transmission; and phase compensation is carried out on the OFDM symbols one by one to specific positions related to the frequency points related to the OFDM symbols, so that the problem of phase rotation caused by inconsistency of the central frequency point of the transmitting end and the central frequency point of the receiving end is solved. At present, the phase compensation of the whole downlink is realized through an FPGA in the existing mode, the development period is long, the cost is high, and the logic resources consumed by devices are large.
Disclosure of Invention
Technical problem to be solved
The method for realizing the phase compensation of the 5G radio frequency unit in the downlink is realized in a simpler and more flexible way, so that the method can be quickly realized in engineering.
(II) technical scheme
In order to solve the technical problems and achieve the purpose of the invention, the invention is realized by the following technical scheme:
a method for 5G ORAN downlink phase compensation comprises the following steps:
s1: calculating the phase compensation of IQ data in a down-conversion frequency domain, wherein the calculation method comprises the following steps:
Figure BDA0003611078670000011
wherein f0 is carrier frequency, mu is subcarrier interval configuration;
for any physical channel or signal other than PRACH, OFDM symbol in subframe
Figure BDA0003611078670000012
Time continuous signal on antenna port of
Figure BDA0003611078670000013
And the subcarrier spacing configuration μ is defined as follows:
Figure BDA0003611078670000014
Figure BDA0003611078670000015
Figure BDA0003611078670000016
Tcis the time within the subframe;
Figure BDA0003611078670000017
Figure BDA0003611078670000018
wherein, the values of delta f are shown in the following table, and mu is the interval configuration of the subcarriers; mu.s0Is the maximum value of μ in the subcarrier spacing configuration determined by the higher layer parameter scsSpecificCarrierList
μ △f＝2μ·15[kHz]
0 15
1 30
2 60
3 120
4 240
The starting position of the OFDM symbol for subcarrier spacing configuration in the subframe is given by:
Figure BDA0003611078670000021
s2: calculating a parameter to be compensated for a phase corresponding to each OFDM symbol in a frame of data under a currently configured frequency point through Cortex a53, specifically as follows:
Calculating coefficients to be subjected to phase compensation of 14 OFDM symbols in each subframe according to a frequency point and a subcarrier interval configured by a user and the following formula, and respectively marking as: IP 0-IP 13, QP 0-QP 13 and sends the parameters to PL end through AXI;
Figure BDA0003611078670000022
Figure BDA0003611078670000023
Figure BDA0003611078670000024
Figure BDA0003611078670000025
wherein, the first and the second end of the pipe are connected with each other,
Figure BDA0003611078670000026
is the PRACH transmission opportunity within the PRACH time slot, from 0 to
Figure BDA0003611078670000027
Figure BDA0003611078670000028
S3: determining each OFDM symbol and the parameters of phase compensation calculation through a control signal related to OFDM;
the 28 parameters derived from ARM are compared to 14 OFDM symbols in each subframe: IQ data of ofdm0 to ofdm13 are respectively subjected to complex operations with corresponding IP0 to IP13 and QP0 to QP 13;
s4: the operation result obtained in step S3 is the new IQ data obtained by phase compensation, and outputs corresponding data.
The invention also provides a device suitable for 5G ora downlink phase compensation, which specifically comprises:
the IQ data calculation module is used for calculating the phase compensation of the IQ data in a down-conversion frequency domain, and the calculation method comprises the following steps:
Figure BDA0003611078670000031
wherein f0 is carrier frequency, mu is subcarrier interval configuration;
the compensation parameter calculation module is used for calculating a parameter to be compensated for a phase corresponding to each OFDM symbol in a frame of data under a currently configured frequency point through Cortex A53; determining parameters of each OFDM symbol and phase compensation calculation through a control signal related to OFDM;
And the output module is used for outputting the new IQ data obtained by compensation.
Further, a way of calculating a parameter that a phase corresponding to each OFDM symbol in data of a frame under a currently configured frequency point should be compensated is as follows:
calculating coefficients to be subjected to phase compensation of 14 OFDM symbols in each subframe according to a frequency point and a subcarrier interval configured by a user and the following formula, and respectively marking as: IP 0-IP 13, QP 0-QP 13 and gives the parameters to PL end through AXI;
Figure BDA0003611078670000032
Figure BDA0003611078670000033
Figure BDA0003611078670000034
Figure BDA0003611078670000035
wherein, the first and the second end of the pipe are connected with each other,
Figure BDA0003611078670000036
is the PRACH transmission opportunity within the PRACH time slot, from 0 to
Figure BDA0003611078670000037
Figure BDA0003611078670000038
Further, the parameters for determining each OFDM symbol and phase compensation calculation by the control signal related to OFDM are: the 28 parameters obtained from ARM are compared to 14 OFDM symbols in each subframe: IQ data of ofdm0 to 13 are respectively subjected to complex operations with corresponding IP0 to IP13, QP0 to QP 13.
(III) advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
the method for realizing the phase compensation of the 5G radio remote unit in the downlink is realized in a simple and flexible mode by realizing the online configuration of the compensation parameters so as to be quickly realized in engineering.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
Fig. 1 is a system configuration diagram according to an embodiment of the present application.
Fig. 2 is a schematic flow chart of a phase compensation method according to an embodiment of the present application.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present disclosure, and the drawings only show the components related to the present disclosure rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
Phase noise is essentially an error between the phase of the local oscillator and the phase of the carrier signal that causes distortion of the received signal of the OFDM system, resulting in degraded system performance. OFDM is widely used in 5G systems because of its multipath interference resistance, high spectrum utilization, and the like. However, in the OFDM system, because the subcarriers are orthogonal to each other, the OFDM system is sensitive to phase noise, and the orthogonality between the subcarriers is easily damaged under the influence of the phase noise, which finally results in the performance degradation of the system.
Referring to fig. 1, the system includes a Cortex a53 processor, an AXI interface unit, and a phase compensation unit, and the method steps suitable for 5G ora downlink phase compensation are as follows:
s1: calculating the phase compensation of the IQ data in a down-conversion frequency domain, wherein the calculating method comprises the following steps:
Figure BDA0003611078670000041
wherein f0 is carrier frequency, mu is subcarrier interval configuration; the UE is a down-conversion terminal;
Since real signals are real signals, complex signals are only used for expression and calculation, down-conversion signal sending parts express actual signals, and therefore real part calculation Re { }istaken here.
According to the property of Fourier transform and the principle of frequency shift and left and right shift addition and subtraction, the CP is to break the continuity of the original OFDM symbol to prevent ISI/ICI, the CP is added before each OFDM, and the CP is removed before FFT, therefore, the phase added in the CP time needs to be compensated.
For anything other than PRACHPhysical channels or signals, OFDM symbols in sub-frames
Figure BDA0003611078670000042
Time continuous signal on antenna port of
Figure BDA0003611078670000043
And subcarrier spacing configuration μ is defined as follows:
Figure BDA0003611078670000044
Figure BDA0003611078670000045
Figure BDA0003611078670000051
Tcis the time within the subframe;
Figure BDA0003611078670000052
Figure BDA0003611078670000053
wherein, the value of delta f is shown in the following table, mu is the interval configuration of the sub-carriers; mu.s0Is the maximum value of μ in the subcarrier spacing configuration determined by the higher layer parameter scsSpecificCarrierList
μ △f＝2μ·15[kHz]
0 15
1 30
2 60
3 120
4 240
The starting position of the OFDM symbol for subcarrier spacing configuration in the subframe is given by:
Figure BDA0003611078670000054
s2: calculating a parameter to be compensated for a phase corresponding to each OFDM symbol in a frame of data under a currently configured frequency point through Cortex a53, specifically as follows:
calculating coefficients to be subjected to phase compensation of 14 OFDM symbols in each subframe according to a frequency point and a subcarrier interval configured by a user and the following formula, and respectively recording the coefficients as: IP 0-IP 13, QP 0-QP 13 and gives the parameters to PL end through AXI;
Figure BDA0003611078670000055
Figure BDA0003611078670000056
Figure BDA0003611078670000057
Figure BDA0003611078670000058
Wherein, the first and the second end of the pipe are connected with each other,
Figure BDA0003611078670000059
is the PRACH transmission opportunity within the PRACH time slot, from 0 to
Figure BDA00036110786700000510
Figure BDA0003611078670000061
S3: determining parameters of each OFDM symbol and phase compensation calculation through a control signal related to OFDM;
the 28 parameters obtained from ARM are compared to 14 OFDM symbols in each subframe: IQ data of ofdm0 to 13 are respectively subjected to complex operations with corresponding IP0 to IP13 and QP0 to QP 13;
s4: the operation result obtained in step S3 is the new IQ data obtained by phase compensation, and outputs corresponding data.
In the embodiment, the coefficient calculated on the ARM is set to the DU or the network manager for calculation, and then is transmitted to the ORU through the network, so as to implement online configuration of the compensation parameter, and implement the method for implementing phase compensation in the downlink of the 5G remote radio unit in a simpler and more flexible manner, so as to be implemented quickly in engineering.
The embodiment of the present invention further provides a device suitable for 5G ora downlink phase compensation, which specifically includes: the IQ data calculation module is used for calculating the phase compensation of the IQ data in a down-conversion frequency domain, and the calculation method comprises the following steps:
Figure BDA0003611078670000062
wherein f0 is carrier frequency, mu is subcarrier interval configuration;
a compensation parameter calculating module, configured to calculate, through Cortex a53, a parameter to be compensated for a phase corresponding to each OFDM symbol in frame data of a currently configured frequency point, where the calculation method is as follows:
Calculating coefficients to be subjected to phase compensation of 14 OFDM symbols in each subframe according to a frequency point and a subcarrier interval configured by a user and the following formula, and respectively recording the coefficients as: IP 0-IP 13, QP 0-QP 13 and sends the parameters to PL end through AXI;
Figure BDA0003611078670000063
Figure BDA0003611078670000064
Figure BDA0003611078670000065
Figure BDA0003611078670000066
wherein, the first and the second end of the pipe are connected with each other,
Figure BDA0003611078670000067
is the PRACH transmission opportunity within the PRACH time slot, from 0 to
Figure BDA0003611078670000068
Figure BDA0003611078670000069
Determining each OFDM symbol and the parameters of phase compensation calculation through a control signal related to OFDM;
the output module is used for outputting new IQ data obtained by compensation, and the calculation mode is as follows:
the 28 parameters derived from ARM are compared to 14 OFDM symbols in each subframe: the IQ data of ofdm0 to ofdm13 are respectively subjected to complex calculations with corresponding IP0 to IP13, QP0 to QP 13.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims (10)

1. A method for 5G ora downlink phase compensation, comprising:
S1: calculating the phase compensation of the IQ data in a down-conversion frequency domain;
s2: calculating a parameter to be compensated for a phase corresponding to each OFDM symbol in a frame of data under a currently configured frequency point through a processor;
s3: determining parameters of each OFDM symbol and phase compensation calculation through a control signal related to OFDM;
s4: the operation result obtained in step S3 is the new IQ data obtained by phase compensation, and outputs corresponding data.
2. The method for 5G ora downlink phase compensation according to claim 1, wherein the calculation method in step S1 is as follows:
Figure FDA0003611078660000011
wherein f0 is carrier frequency, mu is subcarrier interval configuration;
for any physical channel or signal other than PRACH, OFDM symbol in subframe
Figure FDA0003611078660000012
Time continuous signal on antenna port of
Figure FDA0003611078660000013
And the subcarrier spacing configuration μ is defined as follows:
Figure FDA0003611078660000014
Figure FDA0003611078660000015
Figure FDA0003611078660000016
Tcis the time within the subframe;
Figure FDA0003611078660000017
Figure FDA0003611078660000018
wherein mu is subcarrier interval configuration; mu.s0Is the maximum value of μ in the subcarrier spacing configuration determined by the higher layer parameter scspspecificcarrierlist.
3. The method of claim 2, wherein Δ f is as follows:
Δf＝2μ·15(kHz)
wherein, mu is 0, 1, 2, 3 and 4.
4. The method of claim 3, wherein the starting position of the OFDM symbol for sub-carrier spacing configuration in the sub-frame is given by:
Figure FDA0003611078660000019
5. the method for 5G ora downlink phase compensation according to claim 1, wherein the calculation method in step S2 is as follows:
calculating coefficients to be subjected to phase compensation of 14 OFDM symbols in each subframe according to a frequency point and a subcarrier interval configured by a user and the following formula, and respectively recording the coefficients as: IP 0-IP 13, QP 0-QP 13 and sends the parameters to PL end through AXI;
Figure FDA0003611078660000021
Figure FDA0003611078660000022
Figure FDA0003611078660000023
Figure FDA0003611078660000024
wherein, the first and the second end of the pipe are connected with each other,
Figure FDA0003611078660000025
is the PRACH transmission opportunity within the PRACH time slot, from 0 to
Figure FDA0003611078660000026
Figure FDA0003611078660000027
6. The method for 5G ora downlink phase compensation of claim 1, wherein the step S3 further comprises: the 28 parameters obtained from ARM are compared to 14 OFDM symbols in each subframe: IQ data of ofdm0 to 13 are respectively subjected to complex operations with corresponding IP0 to IP13, QP0 to QP 13.
7. An apparatus for 5G ora downlink phase compensation, comprising:
the IQ data calculation module is used for calculating the phase compensation of the IQ data in a down-conversion frequency domain;
the compensation parameter calculation module is used for calculating a parameter to be compensated for a phase corresponding to each OFDM symbol in a frame of data under a currently configured frequency point through the processor; determining parameters of each OFDM symbol and phase compensation calculation through a control signal related to OFDM;
And the output module is used for outputting the new IQ data obtained by compensation.
8. The apparatus of claim 7 adapted for 5G ORAN downlink phase compensation,
the IQ data calculation method comprises the following steps:
Figure FDA0003611078660000028
wherein f0 is the carrier frequency, and μ is the subcarrier spacing configuration.
9. The apparatus as claimed in claim 7, wherein the method for calculating the parameter to be compensated for the phase corresponding to each OFDM symbol in the frame data under the currently configured frequency point is as follows:
calculating coefficients to be subjected to phase compensation of 14 OFDM symbols in each subframe according to a frequency point and a subcarrier interval configured by a user and the following formula, and respectively recording the coefficients as: IP 0-IP 13, QP 0-QP 13 and gives the parameters to PL end through AXI;
Figure FDA0003611078660000029
Figure FDA00036110786600000210
Figure FDA0003611078660000031
Figure FDA0003611078660000032
wherein, the first and the second end of the pipe are connected with each other,
Figure FDA0003611078660000033
is the PRACH transmission opportunity within the PRACH time slot, from 0 to
Figure FDA0003611078660000034
Figure FDA0003611078660000035
10. The apparatus of claim 7, wherein the parameters for determining each OFDM symbol and phase compensation calculation through the OFDM-related control signal are:
the 28 parameters obtained from ARM are compared to 14 OFDM symbols in each subframe: IQ data of ofdm0 to 13 are respectively subjected to complex operations with corresponding IP0 to IP13, QP0 to QP 13.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110090992A1 (en) * 2009-10-15 2011-04-21 Electronics And Telecommunications Research Institute Ofdm receiver and method for compensating for i/q imbalance
CN103401829A (en) * 2013-06-26 2013-11-20 吉林大学 IQ imbalance compensation method for coherent-light orthogonal frequency division multiplexing (OFDM) communication system
CN105847211A (en) * 2016-03-15 2016-08-10 东南大学 Carrier frequency offset estimation method suitable for MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) system
CN107819710A (en) * 2016-09-12 2018-03-20 深圳市中兴微电子技术有限公司 I/Q mismatch compensation method and apparatus, compensation equipment and communication equipment
WO2018088620A1 (en) * 2016-11-09 2018-05-17 주식회사 에치에프알 Method for compensating for distortion of subcarrier by using single-tap equalizer in ofdm system and apparatus therefor
CN114095322A (en) * 2021-09-28 2022-02-25 超讯通信股份有限公司 Phase noise suppression method, phase noise suppression device and storage medium
CN114257253A (en) * 2020-09-21 2022-03-29 珠海全志科技股份有限公司 Method and device for compensating broadband IQ imbalance

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110090992A1 (en) * 2009-10-15 2011-04-21 Electronics And Telecommunications Research Institute Ofdm receiver and method for compensating for i/q imbalance
CN103401829A (en) * 2013-06-26 2013-11-20 吉林大学 IQ imbalance compensation method for coherent-light orthogonal frequency division multiplexing (OFDM) communication system
CN105847211A (en) * 2016-03-15 2016-08-10 东南大学 Carrier frequency offset estimation method suitable for MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) system
CN107819710A (en) * 2016-09-12 2018-03-20 深圳市中兴微电子技术有限公司 I/Q mismatch compensation method and apparatus, compensation equipment and communication equipment
WO2018088620A1 (en) * 2016-11-09 2018-05-17 주식회사 에치에프알 Method for compensating for distortion of subcarrier by using single-tap equalizer in ofdm system and apparatus therefor
CN114257253A (en) * 2020-09-21 2022-03-29 珠海全志科技股份有限公司 Method and device for compensating broadband IQ imbalance
CN114095322A (en) * 2021-09-28 2022-02-25 超讯通信股份有限公司 Phase noise suppression method, phase noise suppression device and storage medium

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"\"GERAN#66_Report_v001\"" *
NOKIA, NOKIA SIEMENS NETWORKS: "R1-131239 \"Impairments Impact on 256QAM DL performance in LTE\"" *
袁建国;张文静;李阳旭: "CO-OFDM系统中的相位噪声补偿算法" *

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