CN111988125B - Wave beam alignment method of millimeter wave integrated communication system compatible with C wave band - Google Patents
Wave beam alignment method of millimeter wave integrated communication system compatible with C wave band Download PDFInfo
- Publication number
- CN111988125B CN111988125B CN202010906919.2A CN202010906919A CN111988125B CN 111988125 B CN111988125 B CN 111988125B CN 202010906919 A CN202010906919 A CN 202010906919A CN 111988125 B CN111988125 B CN 111988125B
- Authority
- CN
- China
- Prior art keywords
- base station
- user
- receiving
- optimal
- wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
Abstract
The invention discloses a wave beam alignment method of a millimeter wave integrated communication system compatible with a C wave band, which mainly solves the problem that self-adaptive wave beam alignment can not be carried out in the prior art, and has the scheme that: the base station determines the initial range of the user position by using the C wave band, generates a beam scanning detection signal to perform time-frequency resource allocation, and obtains a detection frame for millimeter wave beam scanning; the base station scans millimeter wave beams in the initial range of the user position, and the user measures the received signal power; the user selects the best sending wave beam and receiving wave beam according to the power of the received signal; the user feeds back the optimal transmitting beam to the base station; the base station adjusts the current transmitting wave beam to be the optimal transmitting wave beam according to the optimal transmitting wave beam, and the user adjusts the current receiving wave beam to be the optimal receiving wave beam according to the optimal receiving wave beam, so that the self-adaptive wave beam alignment carried out by the C-waveband auxiliary millimeter wave is realized.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a beam alignment method which can be used for a millimeter wave integrated communication system compatible with a C waveband and can improve the space-time-frequency resource utilization rate of the system.
Background
The fifth generation mobile communication system 5G adopts different operating frequency bands, which are divided into a C frequency band and a millimeter wave frequency band. Millimeter wave communication has become one of the key technologies of 5G, and compared with the C-band, millimeter wave communication has the advantages of very wide bandwidth, high gain, few interference sources and high transmission quality although the penetration capability is weak and the signal loss is large, so that cooperative communication using the C-band and the millimeter waves will be the best scheme for 5G communication.
In the application of millimeter wave technology, the transmission quality is improved by using the beam forming technology between the 5G base station and the user, and the method is characterized in that the main lobe of a radiation directional diagram is self-adaptively pointed to the incoming wave direction of the user, so that the signal-to-noise ratio is improved, and obvious array gain is obtained. In order to make better use of beamforming technology, the base station and the user need to use a beam scanning manner to determine the best beam pair between the base station and the user that meets the transmission quality requirement. When both the base station and the user support multiple beams, how to realize beam scanning and beam alignment becomes a crucial research direction for millimeter wave communication.
Detection signals need to be generated to achieve millimeter wave beam alignment, and in 5G, time-frequency resources used by the detection signals are related to subcarrier intervals. The time slot lengths corresponding to different subcarrier intervals are different, but under different subcarrier interval configurations, the lengths of the 5G radio frames and the subframes are the same, the length of the radio frame is 10ms, and the length of the subframe is 1ms, so that the number of time slots contained in each subframe is different. Meanwhile, under the condition of a normal cyclic prefix CP, the number of symbols contained in each time slot is the same, namely 14.
Ericsson limited proposed a "high efficiency beam scanning method for high frequency wireless networks" in patent No. ZL201580072197.2, which discloses systems and methods related to non-adaptive beam scanning in wireless networks. The method comprises the following steps: firstly, the transmitting node transmits a sounding signal on a non-overlapping radio resource slot using each beam of each beam scanning phase, and secondly, the receiving node selects a preferred beam according to the received signal quality for each beam scanning phase; then, an optimal beam is obtained through the multi-stage beam scanning for data transmission. Although the method can realize multi-stage beam scanning, the method is a non-adaptive beam scanning method and is only suitable for beam scanning when a receiving node is fixed, when the receiving node is relocated or user service is changed, adaptive beam scanning cannot be carried out between a base station and a user, and the reliability of beam alignment cannot be ensured, so that the data transmission performance between the base station and the user is influenced.
Disclosure of Invention
The invention aims to provide a wave beam alignment method of a millimeter wave integrated communication system compatible with a C wave band aiming at the defects of the prior art, so as to improve the reliability and efficiency of wave beam alignment and further improve the data transmission performance between a base station and a user.
In order to achieve the purpose, the technical scheme of the invention comprises the following steps:
(1) c-band beam scanning is carried out between the base station and the user, and the initial range of the position of the user is determined to be the selected C-band optimal beam coverage area which comprises a plurality of millimeter wave beams;
(2) the base station generates a beam scanning detection signal r (n) by using the pseudo-random sequence, and performs time-frequency resource allocation on the beam scanning detection signal r (n) to obtain a detection frame suitable for millimeter wave beam scanning;
(3) the base station scans the millimeter wave beam in the initial range of the user position by sending a detection signal, and the user measures the corresponding received signal power;
(4) after the beam scanning process is finished, the user selects the beam pair with the maximum received signal power as the optimal beam pair, which comprises the optimal transmitting beam and the optimal receiving beam;
(5) the user feeds back the optimal sending beam ID to the base station in the uplink time slot of the millimeter wave detection frame;
(6) and the base station adjusts the current transmitting beam to be the optimal transmitting beam according to the optimal transmitting beam ID, and the user adjusts the current receiving beam to be the optimal receiving beam according to the optimal receiving beam ID, so that the beam alignment of the integrated communication system is completed.
Compared with the prior art, the invention has the following advantages:
1) the invention provides a method for beam alignment by using C-band auxiliary millimeter waves, which comprises the specific steps of sending a broadcast frame carrying a synchronous signal block SSB in a C-band to determine an initial range of a user position and feeding the initial range back to a base station, and scanning millimeter wave beams in the initial range of the user position by the base station through sending a detection signal, thereby realizing self-adaptive rapid beam alignment between the base station and the user, overcoming the defect of unreliable beam alignment when the user relocates or changes services in the prior art, and improving the reliability and efficiency of beam alignment.
2) According to the invention, by designing the time-frequency resource allocation rule of the millimeter wave beam scanning detection signal, namely inserting the beam scanning detection signal r (n) into the time-frequency resource corresponding to the detection frame, and simultaneously converting different transmitting and receiving beams on different OFDM symbols of a time domain, the beam scanning is realized by taking the OFDM symbols as a unit, the time-frequency resource occupied by the beam scanning process is reduced, and the beam alignment efficiency is improved.
Drawings
FIG. 1 is a block diagram of a C-band compatible millimeter wave integrated communication system according to the present invention;
FIG. 2 is a schematic diagram of the beam coverage of the C-band compatible millimeter wave integrated communication system according to the present invention;
FIG. 3 is a general flow chart of the wave beam alignment implementation of the C-band compatible millimeter wave integrated communication system of the present invention;
FIG. 4 is a schematic diagram of a C-band broadcast frame structure according to the present invention;
FIG. 5 is a schematic diagram of a millimeter wave probe frame structure in the present invention;
fig. 6 is a sub-flow diagram of beam scanning in the present invention.
Detailed Description
The following describes in further detail specific embodiments of the present invention with reference to the accompanying drawings.
Referring to fig. 1, the present embodiment adopts a C-band compatible millimeter wave integrated communication system, which includes a base station and a user, where the base station and the user both include a high-low frequency cooperative baseband module, an intermediate frequency module, a C-band front end module, and a millimeter wave module.
The high-low frequency cooperative baseband module can be simultaneously suitable for C wave band and millimeter wave band, and comprises an AD/DA digital-to-analog/analog conversion module, an encoding/decoding module, a modulation/demodulation module, a digital pre-coding module, a channel estimation module and a wave beam selection module: the digital-to-analog/analog-to-digital conversion module comprises N digital-to-analog/analog-to-digital converters and is used for converting digital/analog signals into analog/digital signals; the coding module comprises an information source code and a channel code, the information source code compresses signals, the channel code adopts Turbo coding to resist channel interference and attenuation by adding redundant information, and the coding module simultaneously encrypts the signals; the decoding module comprises channel decoding and decryption and is used for receiving the information obtained by signal decryption and decoding; the modulation module adopts 64QAM modulation, so that the information quantity which can be carried by a single symbol is improved; the digital pre-coding module is used for calculating a forming matrix to generate a digital pre-coding codebook of the base station; the channel estimation module is used for estimating a wireless channel; the beam selection module is used for calculating the power of the received signal and selecting the optimal beam pair corresponding to the maximum power of the received signal.
The intermediate frequency module is used for up-converting or down-converting signals.
The C-band front-end module comprises a C-band antenna array which is used for being in communication connection with the base station end, and the size of the antenna is larger than that of millimeter waves.
The millimeter wave radio frequency module comprises a high-frequency modulation/demodulation module, a power amplifier, a filter, a low-noise amplifier, a phase shifter and a millimeter wave band large-scale antenna array: the power amplifier amplifies the signal to obtain enough radio frequency power; the filter filters the signal to eliminate interference clutter; the low-noise amplifier amplifies the received signals, so that the post-processing is facilitated; the phase shifter is used for changing the phase of the analog signal and generating a beam in a specified direction by combining the large-scale antenna array.
Referring to fig. 2, in the C band, a base station transmits K wide beams C1,C2,...,CBCovering a service area; in millimeter wave band, the base station covers service area with K M wave beams, and the service area of every M adjacent wave beams is the same as one C wave band wide wave beam; the user has N beams.
Referring to fig. 3, the implementation steps of the beam alignment method in the millimeter wave integrated communication system compatible with the C-band of the present embodiment are as follows:
The specific implementation manner of the step is as follows:
1.1) the base station sends a broadcast frame carrying a synchronization signal block SSB in a C-band to perform C-band beam scanning, the broadcast frame has a structure as shown in fig. 4, the length of the broadcast frame is 10ms and includes 10 subframes, each subframe is 1ms in length and includes 2 slots, each slot includes 14 OFDM symbols, the sending period of the broadcast frame is 160ms and includes at most 8 synchronization signal blocks SSB, and each C-band beam corresponds to one synchronization signal block SSB;
1.2) after a user receives a C-band broadcast frame, performing cross correlation on a received signal contained in the C-band broadcast frame and a demodulation reference signal DMRS carried in a synchronous signal block SSB to solve a beam ID;
1.3) the user feeds back the beam ID to the base station, the base station takes the beam corresponding to the beam ID as the optimal beam of the C waveband aiming at the user, the coverage area of the base station is the initial range of the user position, and the range comprises M millimeter wave beams.
And 2, the base station generates a beam scanning detection signal r (n) by using the pseudo-random sequence, and performs time-frequency resource allocation on the beam scanning detection signal r (n) to obtain a detection frame suitable for millimeter wave beam scanning.
The design of the beam scanning detection signal r (n) needs to meet the requirements of downlink channel detection and channel state information acquisition, and most importantly, the mutual interference with other signals on the same time-frequency resource is reduced, so that the beam scanning detection signal is generated by using a pseudo-random sequence, and the pseudo-random sequence is calculated by using a first Gold sequence and a second Gold sequence.
2.1) computing a first Gold sequence x1(n)：
Where N is the sequence number of the sequence, mod2 indicates a remainder of 2, N1Is a first Gold sequence x1(n) length;
2.2) computing a second Gold sequence x2(n)：
Wherein (c)init)2(n) denotes an initial reference value cinitIs converted into the nth bit of the binary number from low to high,
is the number of symbols of one slot,
is the time slot number in a sounding frame, l is the symbol number in a time slot, nIDFor the current cell ID, N2Is a second Gold sequence x2(n) length;
2.3) according to a first Gold sequence x1(n) and a second Gold sequence x2(n) calculating the pseudo-random sequence c (n):
c(n)＝(x1(n+1600)+x2(n+1600))mod2,n＝0,1,...,MPN-1，
wherein M isPNIs the length of the pseudorandom sequence c (n);
2.4) generating a beam scanning detection signal r (n) according to the pseudo-random sequence c (n):
where j is an imaginary unit.
2.5) performing time-frequency resource allocation:
referring to fig. 5, the generated beam scanning probing signal r (n) is inserted into the time-frequency resource occupied by the beam scanning, and the insertion rule is as follows:
in a time domain, the base station inserts sounding signals r (n) into eight orthogonal frequency division multiplexing OFDM symbols 4, 5, 6, 7, 11, 12, 13, 14 of each time slot of a sounding frame for millimeter wave beam scanning, and inserts control information into six orthogonal frequency division multiplexing OFDM symbols 1,2, 3, 8, 9, 10 of each time slot of the sounding frame, and the sounding signals r (n) transmitted in the beam scanning can be received by a user by using a specified receiving beam;
in the frequency domain, the base station inserts a sounding signal r (n) into the entire frequency band allocated to the user.
And 3, the base station performs beam scanning on the M millimeter wave beams in the initial range of the user position by sending detection signals r (n), and the user measures the corresponding received signal power.
Referring to fig. 6, the specific implementation of this step is as follows:
3.1) the base station uses the Transmission Beam T in the p-th slot, q-th OFDM symbol of the sounding frameiSending a probe signal r (n), wherein:
3.2) users use reception beams R within the OFDM symbols described in 3.1)jReceiving the detection signal r (n), completing the scanning of a pair of transmitting and receiving beams, and simultaneously measuring the power P of the receiving signalijWherein P isijIs a linear average of the power on all resource elements RE comprised by the received signal within the reception bandwidth;
3.3) repeating 3.1) and 3.2), completing the scanning between M sending beams of the base station and N receiving beams of the user, and obtaining the power of all receiving signals.
M transmitting beams of the base station and N receiving beams of the user form M-N beam pairs, and after the beam scanning process is finished, the user receives signal power P of the M-N beam pairsijSort by size and select PijThe largest beam pair is used as the optimal beam pair, which includes the optimal transmit beam and the optimal receive beam, where i is the transmit beam number of the base station, whose value is 1, 2.
And 5, feeding back the optimal sending beam ID to the base station by the user.
After the beam scanning is completed, since the time cost is required for the user to measure the received signal power and select the optimal beam pair, the user feeds back the optimal transmission beam ID to the base station in the last uplink slot of the sounding frame.
And 6, the base station and the user finish the beam alignment of the integrated communication system according to the optimal transmitting beam ID and the optimal receiving beam ID respectively.
6.1) the base station adjusts the current transmission beam to be the best transmission beam, firstly, according to the ID of the best transmission beam, searching the corresponding phase shifter weight from the transmission beam codebook, and then writing the phase shifter weight into the phase shifter of the transmission antenna array to finish the adjustment of the transmission beam;
6.2) the user adjusts the current receiving beam to be the best receiving beam, firstly, according to the ID of the best receiving beam, searching the corresponding phase shifter weight from the receiving beam codebook, and then writing the weight into the phase shifter of the receiving antenna array to complete the adjustment of the receiving beam;
after the simultaneous execution of 6.1) and 6.2), the beam alignment of the millimeter wave integrated communication system compatible with the C waveband is realized.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A wave beam alignment method of a millimeter wave integrated communication system compatible with a C waveband is characterized by comprising the following steps:
(1) c-band beam scanning is carried out between the base station and the user, and the initial range of the position of the user is determined to be the selected C-band optimal beam coverage area which comprises a plurality of millimeter wave beams; the base station determines the initial range of the user position, and the method is realized as follows:
1a) the base station sends a broadcast frame carrying a synchronous signal block SSB in a C wave band to carry out wave beam scanning of the C wave band;
1b) after a user receives a C-band broadcast frame, performing cross correlation on a received signal contained in the C-band broadcast frame and a demodulation reference signal DMRS carried in an SSB (Signal to interference cancellation) to solve a beam ID (identity);
1c) the user feeds the beam ID back to the base station, the base station takes the beam corresponding to the beam ID as the optimal beam of the C waveband aiming at the user, and the coverage area of the base station is the initial range of the user position;
(2) the base station generates a beam scanning detection signal r (n) by using the pseudo-random sequence, and performs time-frequency resource allocation on the beam scanning detection signal r (n) to obtain a detection frame suitable for millimeter wave beam scanning; the method comprises the steps that a base station generates a detection frame suitable for millimeter wave beam scanning, wherein detection signals r (n) are firstly inserted into eight orthogonal frequency division multiplexing OFDM symbols 4, 5, 6, 7, 11, 12, 13 and 14 of each time slot of a wireless frame in a time domain by the base station, full-band insertion is carried out on a frequency domain, the detection frame with the length of 10ms suitable for millimeter wave beam scanning is obtained, the detection frame comprises 10 subframes, each subframe is 1ms and comprises 4 time slots, and each time slot comprises 14 OFDM symbols;
(3) the base station scans the millimeter wave beam in the initial range of the user position by sending a detection signal, and the user measures the corresponding received signal power;
(4) after the beam scanning process is finished, the user selects the beam pair with the maximum received signal power as the optimal beam pair, which comprises the optimal transmitting beam and the optimal receiving beam;
(5) the user feeds back the optimal sending beam ID to the base station in the uplink time slot of the millimeter wave detection frame;
(6) and the base station adjusts the current transmitting beam to be the optimal transmitting beam according to the optimal transmitting beam ID, and the user adjusts the current receiving beam to be the optimal receiving beam according to the optimal receiving beam ID, so that the beam alignment of the integrated communication system is completed.
2. The method of claim 1, wherein in (2), the base station generates the beam scanning sounding signal r (n) by using a pseudo-random sequence, and the following is implemented:
2a) computing a first Gold sequence X1(n)：
Where N is the sequence number of the sequence, mod2 indicates a remainder of 2, N1Is a first Gold sequence X1(n) length;
2b) computing a second Gold sequence X2(n)：
Wherein (c)init)2(n) denotes an initial reference value cinitIs converted into the nth bit of the binary number from low to high,
is the number of symbols of one slot,
is the time slot number in a sounding frame, l is the symbol number in a time slot, nIDFor the current cell ID, N2Is a second Gold sequence X2(n) length;
2c) calculating a pseudo-random sequence c (n):
c(n)＝(x1(n+1600)+X2(n+1600))mod2，n＝0，1，...，MPN-1，
wherein M isPNIs the length of the pseudorandom sequence c (n);
2d) generating a beam scanning probe signal r (n) according to the pseudo-random sequence c (n):
where j is an imaginary unit.
3. The method of claim 1, wherein in (3), the base station performs beam scanning on the millimeter wave beam in the initial range of the user position by sending a probe signal, and the following is implemented:
3a) the base station uses the transmission beam T in the p slot and q OFDM symbol of the sounding frameiSending a probe signal r (n), wherein:
q0(i-1) × N + j)% 8, int () represents rounding, i is the transmission beam number of the base station, which takes on the value of 1, 2.. multidot.m, M is the transmission beam number of the base station, j is the reception beam number of the base station, which takes on the value of 1, 2.. multidot.n, N is the reception beam number of the base station;
3b) the user using a reception beam R within the OFDM symbol described in 3a)jReceiving the detection signal r (n), completing the scanning of a pair of transmitting and receiving beams, and simultaneously measuring the power P of the receiving signalijWherein P isijIs a linear average of the power on all resource elements RE comprised by the received signal within the reception bandwidth;
3c) repeating 3a) and 3b), completing the scanning between the M transmitting beams of the base station and the N receiving beams of the user, and obtaining the power of all the received signals.
4. The method of claim 1, wherein the base station in (6) adjusts the current working beam to be the best transmission beam according to the best transmission beam ID by the base station searching the corresponding phase shifter weight from the transmission beam codebook according to the best transmission beam ID, and then writing the phase shifter weight into the phase shifter of the transmission antenna array to complete the adjustment of the transmission beam.
5. The method of claim 1, wherein the user in (6) adjusts the current working beam to the best receiving beam according to the best receiving beam ID by searching the corresponding phase shifter weight from the receiving beam codebook according to the best receiving beam ID and writing the phase shifter weight into the phase shifter of the receiving antenna array to complete the adjustment of the receiving beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010906919.2A CN111988125B (en) | 2020-08-31 | 2020-08-31 | Wave beam alignment method of millimeter wave integrated communication system compatible with C wave band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010906919.2A CN111988125B (en) | 2020-08-31 | 2020-08-31 | Wave beam alignment method of millimeter wave integrated communication system compatible with C wave band |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111988125A CN111988125A (en) | 2020-11-24 |
| CN111988125B true CN111988125B (en) | 2021-09-03 |
Family
ID=73448671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010906919.2A Active CN111988125B (en) | 2020-08-31 | 2020-08-31 | Wave beam alignment method of millimeter wave integrated communication system compatible with C wave band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111988125B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113300745B (en) * | 2021-05-18 | 2022-06-03 | 西安电子科技大学 | Method for eliminating depolarization effect interference of dual-polarization dual-frequency fusion system |
| CN113938168B (en) * | 2021-12-16 | 2022-03-04 | 广东省新一代通信与网络创新研究院 | Split beam management method and system for uplink and downlink asymmetric communication MIMO system |
| CN114553284B (en) * | 2022-04-27 | 2022-07-05 | 四川太赫兹通信有限公司 | Beam alignment method, device, base station and computer readable storage medium |
| CN115484682A (en) * | 2022-08-30 | 2022-12-16 | 北京邮电大学 | Wireless baseband processing method and device for realizing communication perception integration |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117792A (en) * | 2013-01-22 | 2013-05-22 | 上海航天测控通信研究所 | Dual-band channel multiplexing small-scale measurement and control data transmission system |
| CN107872252A (en) * | 2016-09-23 | 2018-04-03 | 北京大学（天津滨海）新代信息技术研究院 | A kind of same frequency while full duplex system terminal room interference elimination method based on launching beam shaping |
| CN109792268A (en) * | 2016-08-09 | 2019-05-21 | 瑞典爱立信有限公司 | System and method for the scanning of self-adaptive initial beams simultaneously |
| CN110050427A (en) * | 2017-11-17 | 2019-07-23 | 华为技术有限公司 | System and method for channel measurement in wireless network and interference measurement |
| CN111082861A (en) * | 2019-12-02 | 2020-04-28 | 广东省电信规划设计院有限公司 | Millimeter wave communication test system |
| WO2021025805A1 (en) * | 2019-08-02 | 2021-02-11 | Qualcomm Incorporated | Spur management in millimeter wave communications |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3278467B1 (en) * | 2015-08-14 | 2020-01-01 | Huawei Technologies Co., Ltd. | Access node, user node and method for determining at least one beamforming parameter |
| CN110086553A (en) * | 2019-04-21 | 2019-08-02 | 上海无线通信研究中心 | Wave beam for millimeter-wave communication system is aligned test method and its system |
-
2020
- 2020-08-31 CN CN202010906919.2A patent/CN111988125B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117792A (en) * | 2013-01-22 | 2013-05-22 | 上海航天测控通信研究所 | Dual-band channel multiplexing small-scale measurement and control data transmission system |
| CN109792268A (en) * | 2016-08-09 | 2019-05-21 | 瑞典爱立信有限公司 | System and method for the scanning of self-adaptive initial beams simultaneously |
| CN107872252A (en) * | 2016-09-23 | 2018-04-03 | 北京大学（天津滨海）新代信息技术研究院 | A kind of same frequency while full duplex system terminal room interference elimination method based on launching beam shaping |
| CN110050427A (en) * | 2017-11-17 | 2019-07-23 | 华为技术有限公司 | System and method for channel measurement in wireless network and interference measurement |
| WO2021025805A1 (en) * | 2019-08-02 | 2021-02-11 | Qualcomm Incorporated | Spur management in millimeter wave communications |
| CN111082861A (en) * | 2019-12-02 | 2020-04-28 | 广东省电信规划设计院有限公司 | Millimeter wave communication test system |
Non-Patent Citations (1)
| Title |
|---|
| 毫米波多用户通信系统中快速波束训练算法的研究;常承鹏;《中国优秀硕士学位论文全文数据库 信息科技辑》;20190515;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111988125A (en) | 2020-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111988125B (en) | Wave beam alignment method of millimeter wave integrated communication system compatible with C wave band | |
| US10277374B2 (en) | Methods and systems for orthogonal frequency division multiplexing (OFDM) multiple zone partitioning | |
| KR100354994B1 (en) | Systems and Methods for Data Extension Pilot Symbol Supported Wireless Telephone Communications | |
| CN1154286C (en) | Method and system for determining signal to interference plus noise power ratio (SINR) in communications system | |
| US8576772B2 (en) | Cooperative multiple access in wireless networks | |
| US8284653B2 (en) | User signal transmitting and receiving method, apparatus and system in OFDMA system | |
| US8891648B2 (en) | System for transmitting and receiving channel state information | |
| CA2993642C (en) | Method and apparatus for communicating data in a digital chaos cooperative network | |
| US6377819B1 (en) | Wireless communication system using joined transmit and receive processing | |
| US10277438B2 (en) | Method and apparatus for communicating data in a digital chaos communication system | |
| KR101052368B1 (en) | Communication method, mobile station and base station in wireless communication system | |
| US8743863B2 (en) | Method for ranging devices using code sequences in WLANs | |
| JP2010114940A (en) | Method and device for improving bandwidth efficiency in multiplex input and multiplex output channel | |
| JP2004254285A (en) | Receiver, transmitter and receiving method | |
| CN101427484A (en) | Method and system for transmitting a signal to a communication device in a cellular communication system | |
| JP2011045042A (en) | Method and apparatus for transmission signals in multiple antenna system | |
| US8472309B2 (en) | Using CDMA to send uplink signals in WLANs | |
| CN111817814A (en) | SSB-based 5G NR signal shielding method and system | |
| CN107959520B (en) | Time slot interference alignment method for full duplex base station cellular network | |
| JP5501229B2 (en) | Relay device, communication system, and relay method | |
| CN101394390B (en) | Spectrum-spread type PDH microwave communication system and method | |
| CN115987739A (en) | Communication perception integrated signal processing method based on double time scales | |
| Irfan et al. | A spectral efficient spatially modulated non-orthogonal multiple access for 5G | |
| US20160301551A1 (en) | Radio Frame for Communicating Data in a Digital Chaos Communication System | |
| CN112929108B (en) | Time delay estimation method for radio frequency module in millimeter wave integrated communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |