CN112087798A - Method and device for sending downlink two-antenna pilot frequency of power communication network - Google Patents
Method and device for sending downlink two-antenna pilot frequency of power communication network Download PDFInfo
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- CN112087798A CN112087798A CN201910516135.6A CN201910516135A CN112087798A CN 112087798 A CN112087798 A CN 112087798A CN 201910516135 A CN201910516135 A CN 201910516135A CN 112087798 A CN112087798 A CN 112087798A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- 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
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- 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
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- 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
Abstract
The embodiment of the invention provides a downlink two-antenna pilot frequency sending method and device for a power communication network. The method comprises the following steps: acquiring a first pilot frequency sending pattern of a first antenna and a second pilot frequency sending pattern of a second antenna; performing pilot transmission according to the first pilot transmission pattern and the second pilot transmission pattern; wherein the first pilot transmission pattern and the second pilot transmission pattern respectively comprise respective pilot resources and respective blank time-frequency resources; in the first pilot frequency transmission pattern, the pilot frequency resources of the first antenna and the blank time-frequency resources of the first antenna are arranged in a staggered mode in an increasing mode on a frequency domain, in the second pilot frequency transmission pattern, the pilot frequency resources of the second antenna and the blank time-frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain, and the pilot frequency resources of the first antenna and the pilot frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain. The same antenna has the same frequency conducting points as many as possible, which is beneficial to the estimation of the phase deviation and the frequency deviation of the receiving end.
Description
Technical Field
The invention belongs to the technical field of power communication networks, and particularly relates to a downlink two-antenna pilot frequency sending method and device of a power communication network.
Background
With the rapid development of wireless broadband communication technology, as a supplementary means for power wired optical fiber communication, the supporting capability of wireless communication for power distribution side services has been greatly improved, and more power communication services are considered to be carried by using wireless communication. Currently, Long Term Evolution (LTE) provides a high-speed data transmission service for users as a 4G mainstream technology. For example, the intelligent power grid data acquisition of the power system, the downlink transmission of acquisition instructions, and the uplink transmission of acquired various types of data, some intelligent electric meters can be arranged in places with large road loss and weak coverage, such as under well covers, basements, and the like, and the signal-to-noise ratio of uplink reception is very low. Considering the dispersion of power users, the networking characteristics of the LTE230 system, such as low cost and wide coverage, can well meet the service requirements of the power distribution and utilization terminal remote communication access in the environments of villages, towns and rural areas.
The LTE230 system adopts a TD-LTE standard system architecture, and is mainly composed of a wireless terminal (UE), a wireless base station (eNodeB), a core network EPC, and a network manager eOMC. In a general network of the existing LTE230 system, a downlink single antenna is generally adopted. Under the time slot ratio of uplink and downlink 2:2, the downlink occupies the length of 2 half radio frames, and 22 OFDM symbols are provided, each OFDM symbol is provided with a pilot frequency point, and the pilot frequency points are arranged in a frequency domain increasing mode. Fig. 1 is a schematic diagram of a downlink pilot frequency design when a single antenna is used for downlink in the prior art. Wherein the R boxes show pilot resources and the remaining boxes are antenna data resources.
However, in the border area of the cell or some special places such as the basement, the transmission power of the cell is difficult to cover all users with a single antenna.
Disclosure of Invention
The embodiment of the invention provides a downlink two-antenna pilot frequency sending method and device for a power communication network.
The technical scheme of the embodiment of the invention is as follows:
a downlink two-antenna pilot frequency sending method of a power communication network comprises the following steps:
acquiring a first pilot frequency sending pattern of a first antenna and a second pilot frequency sending pattern of a second antenna;
performing pilot transmission according to the first pilot transmission pattern and the second pilot transmission pattern;
wherein the first pilot transmission pattern and the second pilot transmission pattern respectively comprise respective pilot resources and respective blank time-frequency resources; in the first pilot frequency transmission pattern, the pilot frequency resources of the first antenna and the blank time-frequency resources of the first antenna are arranged in a staggered mode in an increasing mode on a frequency domain, in the second pilot frequency transmission pattern, the pilot frequency resources of the second antenna and the blank time-frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain, and the pilot frequency resources of the first antenna and the pilot frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain.
In one embodiment, the power communication network is an LTE230 power wireless communication private network.
In one embodiment, in the LTE230 private network for power wireless communication, the timeslot ratio of uplink to downlink is 2 to 2; the downlink occupies the length of 2 half radio frames, and the total length is 22 orthogonal frequency division multiplexing OFDM symbols.
In one embodiment, in the first pilot transmission pattern: a first subcarrier of a first OFDM symbol is a pilot frequency resource of a first antenna; a second subcarrier of the second OFDM symbol is a blank time-frequency resource of the first antenna; a third subcarrier of a third OFDM symbol is a pilot frequency resource of the first antenna; a fourth subcarrier of the fourth OFDM symbol is a blank time-frequency resource of the first antenna; a fifth subcarrier of a fifth OFDM symbol is a pilot frequency resource of the first antenna; a sixth subcarrier of the sixth OFDM symbol is a blank time-frequency resource of the first antenna; a seventh subcarrier of a seventh OFDM symbol is a pilot frequency resource of the first antenna; the eighth subcarrier of the eighth OFDM symbol is a blank time-frequency resource of the first antenna; a ninth subcarrier of the ninth OFDM symbol is a pilot resource of the first antenna; a tenth subcarrier of the tenth OFDM symbol is a blank time-frequency resource of the first antenna; an eleventh subcarrier of the eleventh OFDM symbol is a pilot resource of the first antenna.
In one embodiment, in the second pilot transmission pattern: a first subcarrier of the first OFDM symbol is a blank time-frequency resource of the second antenna; a second subcarrier of a second OFDM symbol is a pilot frequency resource of a second antenna; a third subcarrier of the third OFDM symbol is a blank time-frequency resource of the second antenna; a fourth subcarrier of the fourth OFDM symbol is a pilot frequency resource of the second antenna; a fifth subcarrier of a fifth OFDM symbol is a blank time-frequency resource of the second antenna; a sixth subcarrier of the sixth OFDM symbol is a pilot frequency resource of the second antenna; a seventh subcarrier of the seventh OFDM symbol is a blank time frequency resource of the second antenna; the eighth subcarrier of the eighth OFDM symbol is a pilot frequency resource of the second antenna; a ninth subcarrier of the ninth OFDM symbol is a blank time-frequency resource of the second antenna; a tenth subcarrier of the tenth OFDM symbol is a pilot resource of the second antenna; and an eleventh subcarrier of the eleventh OFDM symbol is a blank time-frequency resource of the second antenna.
A downlink two-antenna pilot frequency transmitting device of a power communication network comprises:
the device comprises a pattern acquisition module, a first antenna and a second antenna, wherein the pattern acquisition module is used for acquiring a first pilot frequency transmission pattern of the first antenna and a second pilot frequency transmission pattern of the second antenna;
a pilot sending module, configured to send a pilot according to the first pilot sending pattern and the second pilot sending pattern;
wherein the first pilot transmission pattern and the second pilot transmission pattern respectively comprise respective pilot resources and respective blank time-frequency resources; in the first pilot frequency transmission pattern, the pilot frequency resources of the first antenna and the blank time-frequency resources of the first antenna are arranged in a staggered mode in an increasing mode on a frequency domain, in the second pilot frequency transmission pattern, the pilot frequency resources of the second antenna and the blank time-frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain, and the pilot frequency resources of the first antenna and the pilot frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain.
In one embodiment, the power communication network is an LTE230 power wireless communication private network.
In one embodiment, in the LTE230 private network for power wireless communication, the timeslot ratio of uplink to downlink is 2 to 2; the downlink occupies the length of 2 half radio frames, and the total length is 22 orthogonal frequency division multiplexing OFDM symbols.
In one embodiment, in the first pilot transmission pattern: a first subcarrier of a first OFDM symbol is a pilot frequency resource of a first antenna; a second subcarrier of the second OFDM symbol is a blank time-frequency resource of the first antenna; a third subcarrier of a third OFDM symbol is a pilot frequency resource of the first antenna; a fourth subcarrier of the fourth OFDM symbol is a blank time-frequency resource of the first antenna; a fifth subcarrier of a fifth OFDM symbol is a pilot frequency resource of the first antenna; a sixth subcarrier of the sixth OFDM symbol is a blank time-frequency resource of the first antenna; a seventh subcarrier of a seventh OFDM symbol is a pilot frequency resource of the first antenna; the eighth subcarrier of the eighth OFDM symbol is a blank time-frequency resource of the first antenna; a ninth subcarrier of the ninth OFDM symbol is a pilot resource of the first antenna; a tenth subcarrier of the tenth OFDM symbol is a blank time-frequency resource of the first antenna; an eleventh subcarrier of the eleventh OFDM symbol is a pilot resource of the first antenna.
In one embodiment, in the second pilot transmission pattern: a first subcarrier of the first OFDM symbol is a blank time-frequency resource of the second antenna; a second subcarrier of a second OFDM symbol is a pilot frequency resource of a second antenna; a third subcarrier of the third OFDM symbol is a blank time-frequency resource of the second antenna; a fourth subcarrier of the fourth OFDM symbol is a pilot frequency resource of the second antenna; a fifth subcarrier of a fifth OFDM symbol is a blank time-frequency resource of the second antenna; a sixth subcarrier of the sixth OFDM symbol is a pilot frequency resource of the second antenna; a seventh subcarrier of the seventh OFDM symbol is a blank time frequency resource of the second antenna; the eighth subcarrier of the eighth OFDM symbol is a pilot frequency resource of the second antenna; a ninth subcarrier of the ninth OFDM symbol is a blank time-frequency resource of the second antenna; a tenth subcarrier of the tenth OFDM symbol is a pilot resource of the second antenna; and an eleventh subcarrier of the eleventh OFDM symbol is a blank time-frequency resource of the second antenna.
As can be seen from the above technical solutions, the embodiments of the present invention include: acquiring a first pilot frequency sending pattern of a first antenna and a second pilot frequency sending pattern of a second antenna; performing pilot transmission according to the first pilot transmission pattern and the second pilot transmission pattern; the first pilot frequency sending pattern and the second pilot frequency sending pattern respectively comprise respective pilot frequency resources and respective blank time frequency resources; in the first pilot transmission pattern, the pilot resources of the first antenna and the blank time-frequency resources of the first antenna are arranged in an increasing staggered manner in the frequency domain, in the second pilot transmission pattern, the pilot resources of the second antenna and the blank time-frequency resources of the second antenna are arranged in an increasing staggered manner in the frequency domain, and the pilot resources of the first antenna and the pilot resources of the second antenna are arranged in an increasing staggered manner in the frequency domain. Therefore, after the embodiment of the invention is applied, the pilot frequency resources of each antenna and the blank time frequency resources of the antenna are arranged in a staggered way in the frequency domain in an increasing way, each antenna is provided with the respective blank time frequency resources, and the same antenna has the same frequency pilot frequency points as much as possible, thereby being beneficial to the estimation of the phase deviation and the frequency deviation of a receiving end.
Drawings
Fig. 1 is a schematic diagram of a downlink pilot frequency design when a single antenna is used for downlink in the prior art.
Fig. 2 is a flowchart of a downlink two-antenna pilot transmission method of the power communication network according to the present invention.
Fig. 3 is a wireless frame structure diagram under the timeslot ratio of uplink and downlink 2:2 according to the present invention.
Fig. 4 is a schematic diagram of a pilot structure of two antennas of the power communication network according to the present invention.
Fig. 5 is a structural diagram of a downlink two-antenna pilot transmitting device of a power communication network according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings.
For simplicity and clarity of description, the invention will be described below by describing several representative embodiments. Numerous details of the embodiments are set forth to provide an understanding of the principles of the invention. It will be apparent, however, that the invention may be practiced without these specific details. Some embodiments are not described in detail, but rather are merely provided as frameworks, in order to avoid unnecessarily obscuring aspects of the invention. Hereinafter, "including" means "including but not limited to", "according to … …" means "at least according to … …, but not limited to … … only". In view of the language convention of chinese, the following description, when it does not specifically state the number of a component, means that the component may be one or more, or may be understood as at least one.
Aiming at the technical problem that the transmitting power of a cell is difficult to cover all users in a single antenna, the embodiment of the invention designs a pilot frequency transmitting scheme which supports a downlink 2 antenna and is compatible with the original single antenna scheme in an LTE230 system. The scheme enables the same antenna to have the same frequency conducting points as many as possible, and is beneficial to estimation of phase deviation and frequency deviation of a receiving end.
Fig. 2 is a flowchart of a downlink two-antenna pilot transmission method of the power communication network according to the present invention.
As shown in fig. 2, the method includes:
step 201: a first pilot transmission pattern for a first antenna and a second pilot transmission pattern for a second antenna are obtained.
Step 202: pilot transmission is performed according to the first pilot transmission pattern and the second pilot transmission pattern. The first pilot frequency sending pattern and the second pilot frequency sending pattern respectively comprise respective pilot frequency resources and respective blank time frequency resources; in the first pilot transmission pattern, the pilot resources of the first antenna and the blank time-frequency resources of the first antenna are arranged in an increasing staggered manner in the frequency domain, in the second pilot transmission pattern, the pilot resources of the second antenna and the blank time-frequency resources of the second antenna are arranged in an increasing staggered manner in the frequency domain, and the pilot resources of the first antenna and the pilot resources of the second antenna are arranged in an increasing staggered manner in the frequency domain.
In one embodiment, the power communication network is an LTE230 power wireless communication private network.
In one embodiment, in the LTE230 private network for power wireless communication, the ratio of uplink time slots to downlink time slots is 2 to 2; the downlink occupies the length of 2 half radio frames, and the total length is 22 orthogonal frequency division multiplexing OFDM symbols.
In one embodiment, in the first pilot transmission pattern: a first subcarrier of a first OFDM symbol is a pilot frequency resource of a first antenna; a second subcarrier of the second OFDM symbol is a blank time-frequency resource of the first antenna; a third subcarrier of a third OFDM symbol is a pilot frequency resource of the first antenna; a fourth subcarrier of the fourth OFDM symbol is a blank time-frequency resource of the first antenna; a fifth subcarrier of a fifth OFDM symbol is a pilot frequency resource of the first antenna; a sixth subcarrier of the sixth OFDM symbol is a blank time-frequency resource of the first antenna; a seventh subcarrier of a seventh OFDM symbol is a pilot frequency resource of the first antenna; the eighth subcarrier of the eighth OFDM symbol is a blank time-frequency resource of the first antenna; a ninth subcarrier of the ninth OFDM symbol is a pilot resource of the first antenna; a tenth subcarrier of the tenth OFDM symbol is a blank time-frequency resource of the first antenna; an eleventh subcarrier of the eleventh OFDM symbol is a pilot resource of the first antenna.
In one embodiment, in the second pilot transmission pattern: a first subcarrier of the first OFDM symbol is a blank time-frequency resource of the second antenna; a second subcarrier of a second OFDM symbol is a pilot frequency resource of a second antenna; a third subcarrier of the third OFDM symbol is a blank time-frequency resource of the second antenna; a fourth subcarrier of the fourth OFDM symbol is a pilot frequency resource of the second antenna; a fifth subcarrier of a fifth OFDM symbol is a blank time-frequency resource of the second antenna; a sixth subcarrier of the sixth OFDM symbol is a pilot frequency resource of the second antenna; a seventh subcarrier of the seventh OFDM symbol is a blank time frequency resource of the second antenna; the eighth subcarrier of the eighth OFDM symbol is a pilot frequency resource of the second antenna; a ninth subcarrier of the ninth OFDM symbol is a blank time-frequency resource of the second antenna; a tenth subcarrier of the tenth OFDM symbol is a pilot resource of the second antenna; and an eleventh subcarrier of the eleventh OFDM symbol is a blank time-frequency resource of the second antenna.
The applicant found that: in the frame structure design of the prior art, the ratio of uplink time slots to downlink time slots is 3:1, and the method has great advantages in the service transmission with large uplink data volume. However, for a service with a comparable or larger amount of uplink and downlink data, the traffic is not matched, and there is a case where resource utilization is not reasonable. In order to match services with equivalent uplink and downlink rates and improve the resource utilization rate, the embodiment of the invention provides a 2:2 uplink and downlink time slot ratio frame structure. In addition, in order to solve the coverage problem in some scenarios, the embodiment of the present invention further designs an implementation scheme supporting downlink 2 antennas. Accordingly, a 2-antenna pilot pattern under a 2-to-2 frame structure is proposed.
Fig. 3 is a frame structure diagram of a radio frame in uplink and downlink 2:2 timeslot ratio according to the present invention. Wherein, the number of the downlink frames (D) and the number of the uplink frames (U) are two; the DwPTS of the downlink pilot time slot is 285 Ts; the guard interval GP is 71 Ts; the uplink pilot time slot UpPTS is 284 Ts; the downlink occupies 2 half radio frames in length, and 22 OFDM symbols in total.
Cell-specific reference signals (i.e., pilot signals) are transmitted at one or both antenna ports. Reference signal sequence rl(nRB) Mapping to complex-valued modulation symbols of reference symbols on antenna port p as follows
The above step (1);
wherein
For sub-band nRBAn inner subcarrier index;
when 2 antennas are adopted in the downlink, the requirement of phase deviation estimation is considered, and the same frequency pilot points as many as possible are expected to be arranged on the same antenna.
Fig. 4 is a schematic diagram of a pilot structure of two antennas of the power communication network, which is particularly suitable for the frame structure of the radio frame in the downlink 2:2 timeslot ratio shown in fig. 3.
In fig. 4, the upper part is a pilot transmission pattern of the first antenna. In the pilot transmission pattern of the first antenna, OFDM symbols are sequentially arranged from left to right in the horizontal axis direction, a total of 22 OFDM symbols are provided, subcarriers are sequentially arranged from bottom to top in the vertical axis direction, a total of 11 subcarriers are provided, and R0 is a pilot resource of the first antenna; n is a blank time-frequency resource not occupied by the first antenna data and the first antenna pilot, and the pilot frequency resource of the first antenna and the blank time-frequency resource of the first antenna are incrementally staggered in the frequency domain, i.e., N and R0 are incrementally staggered in the frequency domain.
Specifically, the method comprises the following steps: in a pilot transmission pattern for a first antenna: counting subcarriers from bottom to top and counting OFDM from left to right, wherein the first subcarrier of the first OFDM symbol is a pilot frequency resource of a first antenna; a second subcarrier of the second OFDM symbol is a blank time-frequency resource of the first antenna; a third subcarrier of a third OFDM symbol is a pilot frequency resource of the first antenna; a fourth subcarrier of the fourth OFDM symbol is a blank time-frequency resource of the first antenna; a fifth subcarrier of a fifth OFDM symbol is a pilot frequency resource of the first antenna; a sixth subcarrier of the sixth OFDM symbol is a blank time-frequency resource of the first antenna; a seventh subcarrier of a seventh OFDM symbol is a pilot frequency resource of the first antenna; the eighth subcarrier of the eighth OFDM symbol is a blank time-frequency resource of the first antenna; a ninth subcarrier of the ninth OFDM symbol is a pilot resource of the first antenna; a tenth subcarrier of the tenth OFDM symbol is a blank time-frequency resource of the first antenna; an eleventh subcarrier of the eleventh OFDM symbol is a pilot resource of the first antenna. By analogy, the first subcarrier of the twelfth OFDM symbol is the pilot resource of the first antenna; a second subcarrier of the thirteenth OFDM symbol is a blank time-frequency resource of the first antenna; a third subcarrier of the fourteenth OFDM symbol is a pilot frequency resource of the first antenna; a fourth subcarrier of the fifteenth OFDM symbol is a blank time-frequency resource of the first antenna; a fifth subcarrier of a sixteenth OFDM symbol is a pilot resource of the first antenna; a sixth subcarrier of a seventeenth OFDM symbol is a blank time-frequency resource of the first antenna; a seventh subcarrier of the eighteenth OFDM symbol is a pilot frequency resource of the first antenna; the eighth subcarrier of the nineteenth OFDM symbol is a blank time-frequency resource of the first antenna; a ninth subcarrier of the twentieth OFDM symbol is a pilot resource of the first antenna; a tenth subcarrier of the twenty-first OFDM symbol is a blank time-frequency resource of the first antenna; the eleventh subcarrier of the twenty-second OFDM symbol is a pilot resource of the first antenna.
In fig. 4, the lower part is the pilot transmission pattern of the second antenna. In the pilot transmission pattern of the second antenna, OFDM symbols are from left to right in the horizontal axis direction, there are 22 OFDM symbols in total, subcarriers are from bottom to top in the vertical axis direction, there are 11 subcarriers in total, and R1 is the pilot resource of the second antenna; n is a blank time-frequency resource not occupied by the second antenna data and the second antenna pilot, the pilot resource of the second antenna and the blank time-frequency resource of the second antenna are incrementally staggered in the frequency domain, i.e., N and R1 are incrementally staggered in the frequency domain, and the pilot resource of the first antenna and the pilot resource of the second antenna are incrementally staggered in the frequency domain.
Specifically, the method comprises the following steps: in the second pilot transmission pattern: counting subcarriers from bottom to top and counting OFDM from left to right, wherein a first subcarrier of a first OFDM symbol is a blank time-frequency resource of a second antenna; a second subcarrier of a second OFDM symbol is a pilot frequency resource of a second antenna; a third subcarrier of the third OFDM symbol is a blank time-frequency resource of the second antenna; a fourth subcarrier of the fourth OFDM symbol is a pilot frequency resource of the second antenna; a fifth subcarrier of a fifth OFDM symbol is a blank time-frequency resource of the second antenna; a sixth subcarrier of the sixth OFDM symbol is a pilot frequency resource of the second antenna; a seventh subcarrier of the seventh OFDM symbol is a blank time frequency resource of the second antenna; the eighth subcarrier of the eighth OFDM symbol is a pilot frequency resource of the second antenna; a ninth subcarrier of the ninth OFDM symbol is a blank time-frequency resource of the second antenna; a tenth subcarrier of the tenth OFDM symbol is a pilot resource of the second antenna; and an eleventh subcarrier of the eleventh OFDM symbol is a blank time-frequency resource of the second antenna. By analogy, the first subcarrier of the twelfth OFDM symbol is a blank time-frequency resource of the second antenna; a second subcarrier of the thirteenth OFDM symbol is a pilot frequency resource of the second antenna; a third subcarrier of the fourteenth OFDM symbol is a blank time-frequency resource of the second antenna; a fourth subcarrier of the fifteenth OFDM symbol is a pilot resource of the second antenna; a fifth subcarrier of the sixteenth OFDM symbol is a blank time-frequency resource of the second antenna; a sixth subcarrier of the seventeenth OFDM symbol is a pilot resource of the second antenna; a seventh subcarrier of the eighteenth OFDM symbol is a blank time-frequency resource of the second antenna; the eighth subcarrier of the nineteenth OFDM symbol is a pilot resource of the second antenna; a ninth subcarrier of the twentieth OFDM symbol is a blank time-frequency resource of the second antenna; a tenth subcarrier of the twenty-first OFDM symbol is a pilot resource of the second antenna; and the eleventh subcarrier of the twenty-second OFDM symbol is a blank time-frequency resource of the second antenna.
In fig. 4, the blank time-frequency resource in the first antenna is a blank time-frequency resource that is not occupied by the data of the first antenna and the pilot frequency of the first antenna, so that interference to the pilot frequency of the second antenna can be avoided. The blank time-frequency resource in the second antenna is the blank time-frequency resource which is not occupied by the data of the second antenna and the pilot frequency of the second antenna, so that the interference to the pilot frequency of the first antenna can be avoided. In fig. 4, a pilot offset V in a first pilot transmission pattern and a second pilot transmission patternshiftAre all zero. Those skilled in the art will appreciate that one of the first and second pilot transmission patternsPilot offset VshiftOr may be non-zero.
In fig. 4, R0 and R1 are incrementally staggered in the frequency domain, which ensures that each antenna has 5 to 6 pilot pairs in the same frequency domain position.
Moreover, in fig. 4, the positions occupied by the pilots and the blank resources are the same as the positions occupied by the pilots in the case of a single antenna, and thus, the system is compatible with a single antenna system.
Therefore, the embodiment of the invention provides a pilot frequency sending scheme which is particularly suitable for supporting a downlink 2 antenna under the 2:2 uplink-downlink matching of a power communication network, has the same frequency pilot frequency points as much as possible and is compatible with the original single-antenna scheme.
Fig. 5 is a structural diagram of a downlink two-antenna pilot transmitting device of a power communication network according to the present invention.
As shown in fig. 5, the apparatus includes:
a pattern obtaining module 501, configured to obtain a first pilot transmission pattern of a first antenna and a second pilot transmission pattern of a second antenna;
a pilot sending module 502, configured to send a pilot according to the first pilot sending pattern and the second pilot sending pattern;
wherein the first pilot transmission pattern and the second pilot transmission pattern respectively comprise respective pilot resources and respective blank time-frequency resources; in the first pilot frequency transmission pattern, the pilot frequency resources of the first antenna and the blank time-frequency resources of the first antenna are arranged in a staggered mode in an increasing mode on a frequency domain, in the second pilot frequency transmission pattern, the pilot frequency resources of the second antenna and the blank time-frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain, and the pilot frequency resources of the first antenna and the pilot frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain.
In one embodiment, the power communication network is an LTE230 power wireless communication private network.
In one embodiment, in the LTE230 private network for power wireless communication, the timeslot ratio of uplink to downlink is 2 to 2; the downlink occupies the length of 2 half radio frames, and the total length is 22 orthogonal frequency division multiplexing OFDM symbols.
In one embodiment, in the first pilot transmission pattern: a first subcarrier of a first OFDM symbol is a pilot frequency resource of a first antenna; a second subcarrier of the second OFDM symbol is a blank time-frequency resource of the first antenna; a third subcarrier of a third OFDM symbol is a pilot frequency resource of the first antenna; a fourth subcarrier of the fourth OFDM symbol is a blank time-frequency resource of the first antenna; a fifth subcarrier of a fifth OFDM symbol is a pilot frequency resource of the first antenna; a sixth subcarrier of the sixth OFDM symbol is a blank time-frequency resource of the first antenna; a seventh subcarrier of a seventh OFDM symbol is a pilot frequency resource of the first antenna; the eighth subcarrier of the eighth OFDM symbol is a blank time-frequency resource of the first antenna; a ninth subcarrier of the ninth OFDM symbol is a pilot resource of the first antenna; a tenth subcarrier of the tenth OFDM symbol is a blank time-frequency resource of the first antenna; an eleventh subcarrier of the eleventh OFDM symbol is a pilot resource of the first antenna.
In one embodiment, in the second pilot transmission pattern: a first subcarrier of the first OFDM symbol is a blank time-frequency resource of the second antenna; a second subcarrier of a second OFDM symbol is a pilot frequency resource of a second antenna; a third subcarrier of the third OFDM symbol is a blank time-frequency resource of the second antenna; a fourth subcarrier of the fourth OFDM symbol is a pilot frequency resource of the second antenna; a fifth subcarrier of a fifth OFDM symbol is a blank time-frequency resource of the second antenna; a sixth subcarrier of the sixth OFDM symbol is a pilot frequency resource of the second antenna; a seventh subcarrier of the seventh OFDM symbol is a blank time frequency resource of the second antenna; the eighth subcarrier of the eighth OFDM symbol is a pilot frequency resource of the second antenna; a ninth subcarrier of the ninth OFDM symbol is a blank time-frequency resource of the second antenna; a tenth subcarrier of the tenth OFDM symbol is a pilot resource of the second antenna; and an eleventh subcarrier of the eleventh OFDM symbol is a blank time-frequency resource of the second antenna.
To sum up, the embodiments of the present invention include: acquiring a first pilot frequency sending pattern of a first antenna and a second pilot frequency sending pattern of a second antenna; performing pilot transmission according to the first pilot transmission pattern and the second pilot transmission pattern; wherein the first pilot transmission pattern and the second pilot transmission pattern respectively comprise respective pilot resources and respective blank time-frequency resources; in the first pilot frequency transmission pattern, the pilot frequency resources of the first antenna and the blank time-frequency resources of the first antenna are arranged in a staggered mode in an increasing mode on a frequency domain, in the second pilot frequency transmission pattern, the pilot frequency resources of the second antenna and the blank time-frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain, and the pilot frequency resources of the first antenna and the pilot frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain. Because the pilot frequency resources of the second antenna and the blank time frequency resources of the second antenna are arranged in a staggered way in the frequency domain in an increasing way, and the respective blank time frequency resources are arranged, the same-frequency pilot frequency points with the same antenna are as many as possible, and the estimation of the phase deviation and the frequency deviation of a receiving end is facilitated. The embodiment of the invention is particularly suitable for pilot frequency transmission supporting the downlink 2 antenna under the uplink-downlink ratio of 2 to 2 of the power communication network.
It should be noted that not all steps and modules in the above flows and structures are necessary, and some steps or modules may be omitted according to actual needs. The execution order of the steps is not fixed and can be adjusted as required. The division of each module is only for convenience of describing adopted functional division, and in actual implementation, one module may be divided into multiple modules, and the functions of multiple modules may also be implemented by the same module, and these modules may be located in the same device or in different devices.
The hardware modules in the various embodiments may be implemented mechanically or electronically. For example, a hardware module may include a specially designed permanent circuit or logic device (e.g., a special purpose processor such as an FPGA or ASIC) for performing specific operations. A hardware module may also include programmable logic devices or circuits (e.g., including a general-purpose processor or other programmable processor) that are temporarily configured by software to perform certain operations. The implementation of the hardware module in a mechanical manner, or in a dedicated permanent circuit, or in a temporarily configured circuit (e.g., configured by software), may be determined based on cost and time considerations.
The present invention also provides a machine-readable storage medium storing instructions for causing a machine to perform a method as described herein. Specifically, a system or an apparatus equipped with a storage medium on which a software program code that realizes the functions of any of the embodiments described above is stored may be provided, and a computer (or a CPU or MPU) of the system or the apparatus is caused to read out and execute the program code stored in the storage medium. Further, part or all of the actual operations may be performed by an operating system or the like operating on the computer by instructions based on the program code. The functions of any of the above-described embodiments may also be implemented by writing the program code read out from the storage medium to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion unit connected to the computer, and then causing a CPU or the like mounted on the expansion board or the expansion unit to perform part or all of the actual operations based on the instructions of the program code.
Examples of the storage medium for supplying the program code include floppy disks, hard disks, magneto-optical disks, optical disks (e.g., CD-ROMs, CD-R, CD-RWs, DVD-ROMs, DVD-RAMs, DVD-RWs, DVD + RWs), magnetic tapes, nonvolatile memory cards, and ROMs. Alternatively, the program code may be downloaded from a server computer or the cloud by a communication network.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A downlink two-antenna pilot frequency sending method of a power communication network is characterized by comprising the following steps:
acquiring a first pilot frequency sending pattern of a first antenna and a second pilot frequency sending pattern of a second antenna;
performing pilot transmission according to the first pilot transmission pattern and the second pilot transmission pattern;
wherein the first pilot transmission pattern and the second pilot transmission pattern respectively comprise respective pilot resources and respective blank time-frequency resources; in the first pilot frequency transmission pattern, the pilot frequency resources of the first antenna and the blank time-frequency resources of the first antenna are arranged in a staggered mode in an increasing mode on a frequency domain, in the second pilot frequency transmission pattern, the pilot frequency resources of the second antenna and the blank time-frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain, and the pilot frequency resources of the first antenna and the pilot frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain.
2. The downlink two-antenna pilot transmission method for the power communication network according to claim 1, wherein the power communication network is an LTE230 power wireless communication private network.
3. The downlink two-antenna pilot frequency transmission method for the power communication network according to claim 2, wherein in the LTE230 private power wireless communication network, the uplink and downlink time slot ratio is 2 to 2; the downlink occupies the length of 2 half radio frames, and the total length is 22 orthogonal frequency division multiplexing OFDM symbols.
4. The method for transmitting downlink two-antenna pilot signals in power communication network according to claim 3,
in the first pilot transmission pattern: a first subcarrier of a first OFDM symbol is a pilot frequency resource of a first antenna; a second subcarrier of the second OFDM symbol is a blank time-frequency resource of the first antenna; a third subcarrier of a third OFDM symbol is a pilot frequency resource of the first antenna; a fourth subcarrier of the fourth OFDM symbol is a blank time-frequency resource of the first antenna; a fifth subcarrier of a fifth OFDM symbol is a pilot frequency resource of the first antenna; a sixth subcarrier of the sixth OFDM symbol is a blank time-frequency resource of the first antenna; a seventh subcarrier of a seventh OFDM symbol is a pilot frequency resource of the first antenna; the eighth subcarrier of the eighth OFDM symbol is a blank time-frequency resource of the first antenna; a ninth subcarrier of the ninth OFDM symbol is a pilot resource of the first antenna; a tenth subcarrier of the tenth OFDM symbol is a blank time-frequency resource of the first antenna; an eleventh subcarrier of the eleventh OFDM symbol is a pilot resource of the first antenna.
5. The method for transmitting downlink two-antenna pilot signals in power communication network according to claim 4,
in the second pilot transmission pattern: a first subcarrier of the first OFDM symbol is a blank time-frequency resource of the second antenna; a second subcarrier of a second OFDM symbol is a pilot frequency resource of a second antenna; a third subcarrier of the third OFDM symbol is a blank time-frequency resource of the second antenna; a fourth subcarrier of the fourth OFDM symbol is a pilot frequency resource of the second antenna; a fifth subcarrier of a fifth OFDM symbol is a blank time-frequency resource of the second antenna; a sixth subcarrier of the sixth OFDM symbol is a pilot frequency resource of the second antenna; a seventh subcarrier of the seventh OFDM symbol is a blank time frequency resource of the second antenna; the eighth subcarrier of the eighth OFDM symbol is a pilot frequency resource of the second antenna; a ninth subcarrier of the ninth OFDM symbol is a blank time-frequency resource of the second antenna; a tenth subcarrier of the tenth OFDM symbol is a pilot resource of the second antenna; and an eleventh subcarrier of the eleventh OFDM symbol is a blank time-frequency resource of the second antenna.
6. A downlink two-antenna pilot frequency transmitting device of a power communication network is characterized by comprising the following components:
the device comprises a pattern acquisition module, a first antenna and a second antenna, wherein the pattern acquisition module is used for acquiring a first pilot frequency transmission pattern of the first antenna and a second pilot frequency transmission pattern of the second antenna;
a pilot sending module, configured to send a pilot according to the first pilot sending pattern and the second pilot sending pattern;
wherein the first pilot transmission pattern and the second pilot transmission pattern respectively comprise respective pilot resources and respective blank time-frequency resources; in the first pilot frequency transmission pattern, the pilot frequency resources of the first antenna and the blank time-frequency resources of the first antenna are arranged in a staggered mode in an increasing mode on a frequency domain, in the second pilot frequency transmission pattern, the pilot frequency resources of the second antenna and the blank time-frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain, and the pilot frequency resources of the first antenna and the pilot frequency resources of the second antenna are arranged in a staggered mode in an increasing mode on the frequency domain.
7. The downlink two-antenna pilot transmission device for the power communication network according to claim 6, wherein the power communication network is an LTE230 power wireless communication private network.
8. The downlink two-antenna pilot transmission device of the power communication network according to claim 6, wherein in the LTE230 private power wireless communication network, the ratio of uplink to downlink time slots is 2 to 2; the downlink occupies the length of 2 half radio frames, and the total length is 22 orthogonal frequency division multiplexing OFDM symbols.
9. The downlink two-antenna pilot transmission device of the power communication network according to claim 8,
in the first pilot transmission pattern: a first subcarrier of a first OFDM symbol is a pilot frequency resource of a first antenna; a second subcarrier of the second OFDM symbol is a blank time-frequency resource of the first antenna; a third subcarrier of a third OFDM symbol is a pilot frequency resource of the first antenna; a fourth subcarrier of the fourth OFDM symbol is a blank time-frequency resource of the first antenna; a fifth subcarrier of a fifth OFDM symbol is a pilot frequency resource of the first antenna; a sixth subcarrier of the sixth OFDM symbol is a blank time-frequency resource of the first antenna; a seventh subcarrier of a seventh OFDM symbol is a pilot frequency resource of the first antenna; the eighth subcarrier of the eighth OFDM symbol is a blank time-frequency resource of the first antenna; a ninth subcarrier of the ninth OFDM symbol is a pilot resource of the first antenna; a tenth subcarrier of the tenth OFDM symbol is a blank time-frequency resource of the first antenna; an eleventh subcarrier of the eleventh OFDM symbol is a pilot resource of the first antenna.
10. The downlink two-antenna pilot transmission device of the power communication network according to claim 9,
in the second pilot transmission pattern: a first subcarrier of the first OFDM symbol is a blank time-frequency resource of the second antenna; a second subcarrier of a second OFDM symbol is a pilot frequency resource of a second antenna; a third subcarrier of the third OFDM symbol is a blank time-frequency resource of the second antenna; a fourth subcarrier of the fourth OFDM symbol is a pilot frequency resource of the second antenna; a fifth subcarrier of a fifth OFDM symbol is a blank time-frequency resource of the second antenna; a sixth subcarrier of the sixth OFDM symbol is a pilot frequency resource of the second antenna; a seventh subcarrier of the seventh OFDM symbol is a blank time frequency resource of the second antenna; the eighth subcarrier of the eighth OFDM symbol is a pilot frequency resource of the second antenna; a ninth subcarrier of the ninth OFDM symbol is a blank time-frequency resource of the second antenna; a tenth subcarrier of the tenth OFDM symbol is a pilot resource of the second antenna; and an eleventh subcarrier of the eleventh OFDM symbol is a blank time-frequency resource of the second antenna.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101414986A (en) * | 2007-10-17 | 2009-04-22 | 华为技术有限公司 | Channel estimation method and apparatus |
| CN101836385A (en) * | 2007-09-10 | 2010-09-15 | Lg电子株式会社 | Wireless communication system using pilot subcarrier allocation |
| US20120257553A1 (en) * | 2009-09-27 | 2012-10-11 | Lg Electronics Inc. | Method and apparatus for transmitting reference signal in wireless communication system |
| CN107666380A (en) * | 2016-07-29 | 2018-02-06 | 普天信息技术有限公司 | Method and the base station of down-bound pilot frequency signal are sent in a kind of private network communication system |
-
2019
- 2019-06-14 CN CN201910516135.6A patent/CN112087798A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101836385A (en) * | 2007-09-10 | 2010-09-15 | Lg电子株式会社 | Wireless communication system using pilot subcarrier allocation |
| CN101414986A (en) * | 2007-10-17 | 2009-04-22 | 华为技术有限公司 | Channel estimation method and apparatus |
| US20120257553A1 (en) * | 2009-09-27 | 2012-10-11 | Lg Electronics Inc. | Method and apparatus for transmitting reference signal in wireless communication system |
| CN107666380A (en) * | 2016-07-29 | 2018-02-06 | 普天信息技术有限公司 | Method and the base station of down-bound pilot frequency signal are sent in a kind of private network communication system |
Non-Patent Citations (1)
| Title |
|---|
| RITT: "On Pilot Patterns in MIMO OFDMA Transmissions in E-UTRA", 《3GPP TSG RAN WG1#42 R1-050786》 * |
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