CN110138520B - Uplink carrier transmitting method and device and uplink carrier aggregation device - Google Patents
Uplink carrier transmitting method and device and uplink carrier aggregation device Download PDFInfo
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- CN110138520B CN110138520B CN201810106951.5A CN201810106951A CN110138520B CN 110138520 B CN110138520 B CN 110138520B CN 201810106951 A CN201810106951 A CN 201810106951A CN 110138520 B CN110138520 B CN 110138520B
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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
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
Abstract
The invention provides a method and a device for transmitting uplink carriers, an uplink carrier aggregation device, a storage medium and an electronic device, wherein the method comprises the following steps: combining more than two paths of carriers with different frequencies, and performing power amplification on the combined carriers; separating the combined carrier after power amplification into more than two paths of carriers, and independently filtering each path of separated carrier; and transmitting all the filtered carriers. The invention solves the problems of high cost and high power consumption of the uplink CA circuit design in the related technology, thereby achieving the effects of saving the circuit design cost and layout area of the uplink CA and reducing the power consumption.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for transmitting uplink carriers, an uplink carrier aggregation apparatus, a storage medium, and an electronic apparatus.
Background
Carrier Aggregation (CA) is a new technology of the 4th Generation mobile communication technology (abbreviated as 4G) LTE (Long term evolution) evolution process. The method can fully utilize fragmented spectrum resources, and enables a plurality of LTE frequency bands to be received or transmitted simultaneously, thereby maximizing the spectrum utilization. The throughput of the uplink and the downlink can be greatly improved. Is also a necessary path in the development of the 5th Generation mobile communication technology (abbreviated as 5G). How to meet the requirement of larger bandwidth becomes one of the most important considerations for the evolution from LTE to LTE (Long term evolution-Advanced, LTE-Advanced)/pre5G/5G evolution. This is because: due to the factors such as communication development history and shortage of wireless spectrum resources, the spectrum resources owned by many operators are often discontinuous, and each single frequency band is difficult to meet the requirement of LTE-Advanced on bandwidth. Therefore, the third Generation partnership project (3rd Generation partnership project, referred to as 3GPP) organization has proposed CA, the core concept of the CA technology is: multiple continuous or discrete carriers are aggregated together to form a wider spectrum. The application of the technology not only meets the requirement of LTE-Advanced on bandwidth, but also can improve the utilization rate of the spectrum chip.
For uplink CA, a User Equipment (UE) side needs to modulate, amplify and radiate multiple uplink carriers through an antenna, and a common method is to perform power amplification on each channel of carriers through an independent radio frequency channel. In the current circuit architecture for implementing the uplink CA, if two or more frequency bands are required to be used as the uplink CA, an independent Power Amplifier (PA) needs to be configured for each frequency band, but this design will increase the cost and layout area of the rf circuit, and the current consumed by multiple PAs during simultaneous operation is doubled.
Aiming at the problems of high cost and high power consumption of an uplink CA circuit design in the related technology, no effective solution is provided at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for transmitting uplink carriers, an uplink carrier aggregation device, a storage medium and an electronic device, which are used for at least solving the problems of high cost and high power consumption of uplink CA circuit design in the related art.
According to an embodiment of the present invention, there is provided a carrier aggregation method, including: combining more than two paths of carriers with different frequencies, and performing power amplification on the combined carriers; separating the combined carrier after power amplification into more than two paths of carriers, and independently filtering each path of separated carrier; and transmitting all the filtered carriers.
Optionally, before combining two or more carriers with different frequencies, the method further includes: and respectively carrying out power amplification with preset gain on the more than two paths of carriers with different frequencies.
Optionally, after performing power amplification on the combined carrier, the method further includes: determining the first carrier power of each path of carrier in the combined carriers after power amplification; and adjusting the preset gain according to the first carrier power.
Optionally, the determining the first carrier power of each path of carriers in the combined carriers after power amplification includes: sampling and picking up the transmitting power of each path of carrier; and carrying out down-conversion processing on the sampled and picked transmitting power according to the carrier waves to obtain the first carrier wave power of each path of carrier waves.
Optionally, after independently filtering each separated carrier, the method further includes: determining the second carrier power of each path of carrier after filtering; and adjusting the preset gain according to the second carrier power.
Optionally, the determining the filtered second carrier power of each path of carriers includes: sampling and picking up the transmission power of each path of carrier wave after filtering; and carrying out down-conversion processing on the sampled and picked transmitting power according to the carrier waves to obtain the second carrier wave power of each path of carrier waves after filtering.
Optionally, before combining two or more carriers with different frequencies, the method further includes: and the method is used for removing the carrier combination from the available combination when the carrier combination consisting of the two or more than two paths of carriers with different frequencies is determined to generate a spurious spectrum which strongly interferes with other frequency bands.
According to another embodiment of the present invention, there is provided an uplink carrier transmitting apparatus, including: the first processing module is used for combining more than two paths of carriers with different frequencies and amplifying the power of the combined carriers; the second processing module is used for separating the combined carrier subjected to power amplification into more than two paths of carriers and independently filtering each path of separated carriers; and the transmitting module is used for transmitting all the filtered carriers.
Optionally, the apparatus further comprises: and the third processing module is used for respectively carrying out power amplification with preset gain on more than two paths of carriers with different frequencies before the carriers with more than two paths of different frequencies are combined.
According to another embodiment of the present invention, an uplink carrier aggregation apparatus is provided, including: combiner, broadband power amplifier, frequency divider, filter and transmitter, wherein: the combiner is used for combining more than two paths of carriers with different frequencies; the broadband power amplifier is connected with the combiner and is used for amplifying the power of the combined carrier; the frequency divider is connected with the broadband power amplifier and is used for separating the combined carrier subjected to power amplification into more than two paths of carriers; the filter is connected with the frequency divider and is used for independently filtering each separated carrier; and the transmitter is connected with the filter and used for transmitting all the filtered carriers.
Optionally, the apparatus further includes an adjustable gain amplifier, where the adjustable gain amplifier is connected to the combiner, and is configured to perform power amplification with a predetermined gain on the two or more different frequency carriers before combining the two or more different frequency carriers.
Optionally, the apparatus further includes a first directional coupler, a first power detection unit, and a first power control unit, where the first directional coupler is connected to the wideband power amplifier and the frequency division ratio, and is configured to sample and pick up transmission power of each channel of carriers in the combined carriers after power amplification; the first power detection unit is connected with the first directional coupler and used for carrying out down-conversion processing on the transmission power picked up by sampling according to carriers to obtain first carrier power of each path of carrier; the first power control unit is connected with the first power detection unit and the adjustable gain amplifier, and is configured to adjust the predetermined gain according to the first carrier power.
Optionally, the apparatus further includes a second directional coupler, a second power detection unit, and a second power control unit, where the second directional coupler is connected to the filter and is configured to sample and pick up the transmission power of each filtered carrier; the second power detection unit is connected with the second directional coupler and used for carrying out down-conversion processing on the sampled and picked transmitting power according to the carrier waves to obtain second carrier wave power of each channel of carrier waves after filtering; the second power control unit is connected with the second power detection unit and the adjustable gain amplifier, and is configured to adjust the predetermined gain according to the second carrier power.
Optionally, the apparatus further includes a collision detection unit, configured to, when it is determined that a carrier combination composed of the two or more carriers with different frequencies generates a spurious spectrum that strongly interferes with other frequency bands, eliminate the carrier combination from available combinations.
According to a further embodiment of the present invention, there is also provided a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.
According to the invention, because the multi-channel carriers are subjected to unified power amplification after being combined, the power amplification of the multi-channel carriers can be realized by only using one broadband power amplifier, and compared with the mode that an independent broadband power amplifier is required to be configured for each channel of carrier in the related art, the scheme in the embodiment of the invention can reduce the number of the broadband power amplifiers, thereby solving the problems of high cost and high power consumption of the uplink CA circuit design in the related art, and achieving the effects of saving the circuit design cost and layout area of the uplink CA and reducing the power consumption.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a block diagram of a hardware structure of a mobile terminal of a carrier aggregation method according to an embodiment of the present invention;
fig. 2 is a flowchart of a transmission method of an uplink carrier according to an embodiment of the present invention;
FIG. 3 is a block diagram of a system architecture according to an embodiment of the present invention;
FIG. 4 is a block diagram of a system architecture according to an embodiment of the present invention;
FIG. 5 is a simulation diagram of the effects of an implementation according to an alternative embodiment of the invention;
fig. 6 is a block diagram of an uplink carrier aggregation apparatus according to an alternative embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The key in the embodiment of the invention is to provide a carrier aggregation method aiming at the problems of high cost and high power consumption of the design of an uplink carrier aggregation circuit in the related technology, which can realize the effects of saving the circuit design cost and layout area of uplink CA and reducing the power consumption. The invention is illustrated below with reference to examples:
example one
The method provided in the embodiment of the application can be executed in a mobile terminal, a computer terminal or a similar operation device. Taking the operation on a mobile terminal as an example, fig. 1 is a hardware block diagram of the mobile terminal according to the uplink carrier transmission method of the embodiment of the present invention. As shown in fig. 1, the mobile terminal 10 may include one or more (only one shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 104 for storing data, and a transmitting device 106 for communication functions. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration and is not intended to limit the structure of the electronic device. For example, the mobile terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 may be used to store software programs and modules of application software, such as program instructions/modules corresponding to the message processing method in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, so as to implement the above-mentioned method. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal 10. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
Example two
In this embodiment, a method for transmitting an uplink carrier is provided, and fig. 2 is a flowchart of the method for transmitting an uplink carrier according to the embodiment of the present invention, as shown in fig. 2, the method includes the following steps:
step S202, combining more than two paths of carriers with different frequencies, and amplifying the power of the combined carriers;
step S204, separating the combined carrier after power amplification into more than two paths of carriers, and independently filtering each path of separated carriers;
and step S206, transmitting all the filtered carriers.
The main body for performing the above steps may be a terminal, for example, a mobile terminal as shown in the first embodiment. The combiner can be used for combining carriers, when the combined carriers are subjected to power amplification, the broadband power amplifier can be used for power amplification, when the carriers are separated, the frequency divider can perform the power amplification, when the carriers are filtered, the filters can perform the power amplification, different carriers can correspond to different filters, in the embodiment, when the carriers are transmitted, the carriers can be transmitted by using an antenna, after being combined, the carriers after being independently filtered can be transmitted by the antenna, or the carriers after being independently filtered can be transmitted by different antennas.
Through the embodiment, because the multi-channel carriers are subjected to unified power amplification after being combined, the power amplification of the multi-channel carriers can be realized by only utilizing one broadband power amplifier, and compared with the mode that an independent broadband power amplifier is required to be configured for each channel of carrier in the related art, the scheme in the embodiment of the invention can reduce the number of the broadband power amplifiers, thereby solving the problems of high cost and high power consumption of the uplink CA circuit design in the related art, and achieving the effects of saving the circuit design cost and layout area of the uplink CA and reducing the power consumption.
In an optional embodiment, before combining the two or more carriers with different frequencies, the method further includes: and respectively carrying out power amplification with preset gain on the two or more paths of carriers with different frequencies. In this embodiment, before combining a plurality of carriers with different frequencies, each carrier may be first subjected to a preliminary power amplification, where each carrier may be subjected to the preliminary power amplification by using an adjustable gain amplifier, different carriers may correspond to different adjustable gain amplifiers, and when the adjustable gain amplifier preliminarily amplifies the carrier, the output power of a subsequent wideband power amplifier may be adjusted by adjusting corresponding gains according to a network requirement, where the specific adjustment manner is as follows:
when adjusting the corresponding gain, there may be two adjustment modes, one is to determine the first carrier power of each path of carriers in the combined carriers after performing power amplification on the combined carriers; and adjusting the preset gain according to the first carrier power. In this embodiment, after the carrier is subjected to uniform power amplification and before the combined carrier subjected to power amplification is separated into more than two paths of carriers, the actual power of each path of carrier is determined, and the gain of the gain amplifier corresponding to each path of carrier is adjusted according to the actual power, so that the power of the subsequent carrier input to the broadband power amplifier meets the network requirement.
In the above embodiment, when determining the first carrier power of each path of carriers in the combined carriers after power amplification, the determination may be performed as follows: sampling and picking up the transmitting power of each path of carrier; and performing down-conversion processing on the sampled and picked transmitting power according to carriers to obtain first carrier power of each path of carrier, wherein the sampling and picking can be performed by using a directional coupler, the down-conversion processing can be performed by using a power detection unit, and the gain adjustment processing can be performed by using a power control unit. In this embodiment, a block diagram of the system may refer to fig. 3.
Another way to adjust the corresponding gain is that after performing independent filtering on each separated carrier, the method further includes: determining the second carrier power of each path of carrier after filtering; and adjusting the preset gain according to the second carrier power. In this embodiment, after filtering each path of carrier, the actual power of each path of carrier may be determined, and the gain of the gain amplifier corresponding to each path of carrier may be adjusted according to the actual power, so that the power of the subsequent carrier input to the wideband power amplifier meets the network requirement.
In the above embodiment, when determining the second carrier power of each filtered path of carriers, the determination may be performed as follows: sampling and picking up the transmission power of each path of carrier wave after filtering; and performing down-conversion processing on the sampled and picked transmitting power according to the carrier to obtain the filtered second carrier power of each path of carrier, wherein the sampling and the picking can be performed by using a directional coupler, the down-conversion processing can be performed by using a power detection unit, and the gain adjustment processing can be performed by using a power control unit. In this embodiment, a block diagram of the system is shown in fig. 4.
In an optional embodiment, before performing carrier aggregation, it may be further determined whether a carrier to be subjected to carrier aggregation strongly interferes with other operating frequency bands, and in this embodiment, before combining two or more carriers with different frequencies, the method further includes: and when the carrier combination consisting of the more than two paths of carriers with different frequencies is determined to generate a spurious spectrum which strongly interferes other working frequency bands, the carrier combination is removed from the available combination. In this embodiment, the collision detection unit may perform interference determination, and the interference determination is described below with reference to a specific embodiment: it is assumed that carrier aggregation is performed on carrier 1 (e.g., Primary Carrier Component (PCC)) and carrier 2 (e.g., Secondary Carrier Component (SCC)), where when an LTE terminal operates, the LTE terminal transmits carrier 1 and carrier frequency f1, and first initiates random access as PCC to establish Radio Resource Control (RRC) connection. The network then requests to establish a connection for the SCC using transmit carrier 2, carrier frequency f 2. Carrier frequency f1 and carrier frequency f2 are both within the support range of the wideband power amplifier; the collision detection unit calculates intermodulation product IM frequency points of the uplink carrier frequency f1 and the uplink carrier frequency f2 by the following formula: IM is m f1 ± n f2, where m and n are natural numbers, such as 1, 2, 3, 4, etc.
If the difference value between the IM value and the preset sensitive frequency list is smaller than a preset value, refusing the establishment of the uplink SCC; otherwise, the establishment of the uplink SCC is accepted. The preset sensitive frequency list may be set manually or determined by other means. The sensitive frequency list can be set to a Global Positioning System (GPS) frequency of 1575.42MHz, a downlink carrier frequency f1+ Tx _ Rx _ Span corresponding to an uplink carrier f1, and a downlink carrier frequency f2+ Tx _ Rx _ Span corresponding to an uplink carrier f 2.
The invention is explained below with reference to simulation results: when the carrier subjected to carrier aggregation is a dual carrier, and the uplink dual carriers are PCC Band 21850 MHz and SCC B41710 MHz respectively, when the amplitude of the carrier signal after combined amplification meets the requirement, the intermodulation component meets the requirement of the federal communications commission FCC < -13dBm, as shown in fig. 5, where the abscissa is frequency and the ordinate is the amplitude of each frequency spectrum.
In this embodiment, the requirement of the 3GPP for the LTE Spurious emission is shown in table 1 (Spurious emissions limits), and the Spurious emission limit of the present invention is also within the requirement range.
TABLE 1
The 3GPP has the following coexistence requirements: when a frequency band is transmitted, the limit of the stray power required to fall into the protected frequency band does not exceed the limits shown in tables 2 and 3, and the minimum limit of tables 2 and 3 is-50 dBm. Intermodulation products which may exceed-50 dBm mainly fall to 3-4GHz through simulation, and can be solved through a preset wave limiting circuit or a low-pass filter circuit. TABLE 2
TABLE 3
EXAMPLE III
Through the description of the second embodiment, it is clear to those skilled in the art that the method according to the above embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
In this embodiment, a transmitting apparatus for uplink carriers is further provided, where the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details are not repeated for what has been described. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 6 is a block diagram of a transmitting apparatus of an uplink carrier according to an embodiment of the present invention, and as shown in fig. 6, the apparatus includes the following modules:
the first processing module 62 is configured to combine two or more carriers with different frequencies, and perform power amplification on the combined carriers; a second processing module 64, connected to the first processing module, for separating the combined carrier after power amplification into more than two paths of carriers, and performing independent filtering on each path of separated carriers; and a transmitting module 66, connected to the second processing module 64, for transmitting all the carriers after independent filtering.
In an optional embodiment, the apparatus further comprises: and the third processing module is used for respectively carrying out power amplification with preset gain on more than two paths of carriers with different frequencies before the carriers with more than two paths of different frequencies are combined.
In an alternative embodiment, the apparatus is further configured to: after power amplification is carried out on the combined carrier, the first carrier power of each path of carrier in the combined carrier after power amplification is carried out is determined; and adjusting the preset gain according to the first carrier power.
In an optional embodiment, the apparatus may determine the first carrier power of each path of carriers in the combined carriers after performing power amplification by: sampling and picking up the transmitting power of each path of carrier; and carrying out down-conversion processing on the sampled and picked transmitting power according to the carrier waves to obtain the first carrier wave power of each path of carrier waves.
In an alternative embodiment, the apparatus is further configured to: after each separated path of carrier is independently filtered, determining the power of a second carrier of each filtered path of carrier; and adjusting the preset gain according to the second carrier power.
In an optional embodiment, the apparatus may determine the second carrier power of each filtered carrier by: sampling and picking up the transmission power of each path of carrier wave after filtering; and carrying out down-conversion processing on the sampled and picked transmitting power according to the carrier waves to obtain the second carrier wave power of each path of carrier waves after filtering.
In an alternative embodiment, the apparatus is further configured to: before combining more than two paths of carriers with different frequencies, when determining that a carrier combination consisting of the more than two paths of carriers with different frequencies can generate a stray spectrum which strongly interferes other frequency bands, removing the carrier combination from an available combination.
It should be noted that, in this embodiment, the specific description of the transmitting apparatus of the uplink carrier and the specific processing of each module in the apparatus may refer to the specific description in the second embodiment, and will not be described herein again.
Example four
In this embodiment, an uplink carrier aggregation apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details of which have been already described are omitted.
The carrier aggregation apparatus in this embodiment includes: combiner, broadband power amplifier, frequency divider, filter and transmitter, wherein: the combiner is used for combining more than two paths of carriers with different frequencies; the broadband power amplifier is connected with the combiner and is used for amplifying the power of the combined carrier; the frequency divider is connected with the broadband power amplifier and is used for separating the combined carrier subjected to power amplification into more than two paths of carriers; the filter is connected with the frequency divider and is used for independently filtering each separated carrier; and the transmitter is connected with the filter and used for transmitting all the carriers after independent filtering. In this embodiment, when the carrier is transmitted, the carrier may be transmitted by using an antenna, each path of carrier after independent filtering may be combined and then transmitted by using the antenna, or each path of carrier after independent filtering may be transmitted by using different antennas.
In an optional embodiment, the apparatus further includes an adjustable gain amplifier, where the adjustable gain amplifier is connected to the combiner, and is configured to perform power amplification with a predetermined gain on two or more different carriers before combining the two or more different carriers.
In an optional embodiment, the apparatus further includes a first directional coupler, a first power detection unit, and a first power control unit, where the first directional coupler is connected to the wideband power amplifier and the frequency division ratio, and is configured to sample and pick up transmission power of each channel of carriers in the combined carriers after power amplification; the first power detection unit is connected with the first directional coupler and used for carrying out down-conversion processing on the transmission power picked up by sampling according to carriers to obtain first carrier power of each path of carrier; the first power control unit is connected to the first power detection unit and the adjustable gain amplifier, and is configured to adjust the predetermined gain according to the first carrier power, and a specific structural block diagram may refer to fig. 3, where a directional coupler in fig. 3 corresponds to the first directional coupler in this embodiment, a power detection unit in fig. 3 corresponds to the first power detection unit in this embodiment, and a power control unit in fig. 3 corresponds to the first power control unit in this embodiment.
In an optional embodiment, the apparatus further includes a second directional coupler, a second power detection unit, and a second power control unit, where the second directional coupler is connected to the filter and is configured to sample and pick up the transmission power of each filtered carrier; the second power detection unit is connected with the second directional coupler and used for carrying out down-conversion processing on the sampled and picked transmitting power according to the carrier waves to obtain second carrier wave power of each channel of carrier waves after filtering; the second power control unit is connected with the second power detection unit and the adjustable gain amplifier, and is configured to adjust the predetermined gain according to the second carrier power. Fig. 4 may be referred to as a specific block diagram, where the directional coupler in fig. 4 corresponds to the second directional coupler in this embodiment, the power detection unit in fig. 4 corresponds to the second power detection unit in this embodiment, and the power control unit in fig. 4 corresponds to the second power control unit in this embodiment.
In an optional embodiment, the apparatus further includes a collision detection unit, configured to, when it is determined that there is an interfering carrier that may strongly interfere with other carriers in the two or more carriers with different frequencies, remove the interfering carrier from the two or more carriers with different frequencies. In this embodiment, the collision detection unit is configured to calculate whether a dual-carrier intermodulation product frequency point collides with a high-sensitivity frequency, and avoid establishing a carrier combination with a strong interference risk.
EXAMPLE five
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
Embodiments of the present invention also provide a storage medium having a computer program stored thereon, wherein the computer program is configured to perform the steps of any of the above method embodiments when executed.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device, including a memory and a processor, where the memory stores a computer program, and the processor is configured to execute the computer program to perform the steps in any of the above method embodiments.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
The invention is illustrated below with reference to specific examples:
the following takes dual carrier aggregation as an example to illustrate the invention as a whole:
it is assumed that carrier aggregation is performed on carrier 1 (e.g., Primary Carrier Component (PCC)) and carrier 2 (e.g., Secondary Carrier Component (SCC)), where when an LTE terminal operates, the LTE terminal transmits carrier 1 and carrier frequency f1, and first initiates random access as PCC to establish Radio Resource Control (RRC) connection. The network then requests to establish a connection for the SCC using transmit carrier 2, carrier frequency f 2. Carrier frequency f1 and carrier frequency f2 are both within the support range of the wideband power amplifier; the collision detection unit calculates intermodulation product IM frequency points of the uplink carrier frequency f1 and the uplink carrier frequency f2 by the following formula: IM is m f1 ± n f2, where m and n are natural numbers, such as 1, 2, 3, 4, etc.
If the difference value between the IM value and the preset sensitive frequency list is smaller than a preset value, refusing the establishment of the uplink SCC; otherwise, the establishment of the uplink SCC is accepted. The preset sensitive frequency list may be set manually or determined by other means. The sensitive frequency list can be set to the GPS frequency 1575.42MHz, the downlink carrier frequency f1+ Tx _ Rx _ Span corresponding to the uplink carrier f1, and the downlink carrier frequency f2+ Tx _ Rx _ Span corresponding to the uplink carrier f 2.
Since transmit carrier 1 and transmit carrier 2 may be in different cells, the radio link loss is different. The expected power for the network side for transmit carrier 1 and transmit carrier 2 may not be the same, Pout1 and Pout2 respectively.
The UE reads the corresponding relation between the pre-measured radio frequency channels Gadj and Pout, and the gain of the adjustable gain amplifier 1 corresponding to Pout is set to be Gadj1, and the gain of the adjustable gain amplifier 2 is set to be Gadj 2;
the carrier 1 and the carrier 2 output by the adjustable gain amplifier 1 and the adjustable gain amplifier 2 enter the input end of the broadband power amplifier simultaneously through the combiner, and the transmitting carriers 1 and2 entering the power amplifier can have different power amplitudes. Different transmit carriers are simultaneously power amplified.
The directional coupler is arranged at the rear end of the broadband power amplifier, and the transmitting power directionally coupled to the directional coupler is output to the power detection unit. The power detection unit respectively carries out down-conversion, the amplitude of the transmitting carrier 1 and the amplitude of the transmitting carrier 2 are respectively measured, the power control unit calculates the deviation between the actual transmitting power and the expected power by contrasting the power detection level preset in the UE and the carrier transmitting power Pout of the antenna port of the UE, and the gain of the adjustable gain amplifier corresponding to different transmitting carriers is adjusted, so that the power error is reduced.
The amplified carrier signals output by the power amplifier are passed through a frequency divider into a dedicated filtering channel to suppress harmonics and intermodulation products m f1 n f2 generated by carrier 1 and carrier 2. According to measurement and calculation, the intermodulation products of most frequency band combinations meet the requirements of 3GPP and FCC. For intermodulation products which are not involved in FCC and 3GPP and can cause deterioration to users or networks, the intermodulation products are avoided by a preposed conflict detection unit so as to ensure the performance experience of the UE.
In this embodiment, the following problems can be comprehensively considered when a plurality of independent carriers enter the same power amplifier for amplification:
1. the power control of each uplink carrier is independent as required by the protocol. If the multi-channel carrier waves are amplified simultaneously by a power amplifier, the mutual influence among the carrier waves needs to be avoided; the gain of the power amplifier must be stable, and an envelope control mode cannot be adopted; the power detection needs to independently detect each carrier wave, and adopts intermediate frequency detection or baseband detection; at the moment, the power amplifier is required to be used as a fixed gain amplifier;
2. the scheme in the embodiment of the invention brings the problem of intermodulation among carriers, and for this reason, through measurement and calculation, when the maximum power of each carrier at a power amplifier output port reaches 27dBm, the maximum IM3 level possibly reaches 0 dBm. It is necessary to meet the FCC requirements and other wireless network transmission noise floor requirements through appropriate power back-off and out-of-band rejection. For special frequency bands, such as GPS and local receiving frequency, higher requirements such as-140 dBm/Hz are required, and the single-dependence filter cannot suppress the frequency. How this risk is circumvented is also a category considered by the present invention.
3. The power combination of each carrier is large, and the ACLR of the high-power carrier has a degrading effect on the SNR of the low-power carrier. The high power carrier wave only raises the background noise to the adjacent frequency band, and quickly attenuates along with the distance of the frequency band. The carrier aggregation in the same frequency band is usually sent by a cell antenna, and the same power control mode is adopted, so that the mutual interference is small; and the inter-band carrier aggregation has feasibility because the influence of the background noise of the high-power carrier is greatly reduced due to the far frequency.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A method for transmitting uplink carriers, comprising:
respectively carrying out power amplification with preset gain on more than two paths of carriers with different frequencies;
combining the two or more paths of carriers with different frequencies, and performing power amplification on the combined carriers;
separating the combined carrier after power amplification into more than two paths of carriers, and sampling and picking up the transmitting power of each path of carrier;
carrying out down-conversion processing on the transmission power picked up by sampling according to carriers to obtain first carrier power of each path of carrier;
adjusting the predetermined gain according to the first carrier power;
carrying out independent filtering on each separated carrier;
sampling and picking up the transmission power of each filtered carrier wave;
carrying out down-conversion processing on the sampled and picked transmitting power according to carriers to obtain second carrier power of each path of the filtered carriers;
adjusting the predetermined gain according to the second carrier power;
and transmitting all the filtered carriers.
2. The method of claim 1, wherein before combining the two or more carriers of different frequencies, the method further comprises:
and when the carrier combination consisting of the more than two paths of carriers with different frequencies is determined to generate a spurious spectrum which strongly interferes other working frequency bands, the carrier combination is removed from the available combination.
3. An apparatus for transmitting uplink carriers, comprising:
the first processing module is used for combining more than two paths of carriers with different frequencies and amplifying the power of the combined carriers;
the second processing module is used for separating the combined carrier after power amplification into more than two paths of carriers and sampling and picking up the transmitting power of each path of carrier; carrying out down-conversion processing on the transmission power picked up by sampling according to carriers to obtain first carrier power of each path of carrier; adjusting a predetermined gain according to the first carrier power; carrying out independent filtering on each separated carrier; sampling and picking up the transmission power of each filtered carrier wave; carrying out down-conversion processing on the sampled and picked transmitting power according to carriers to obtain second carrier power of each path of the filtered carriers; adjusting the predetermined gain according to the second carrier power;
the transmitting module is used for transmitting all the filtered carriers;
and the third processing module is used for respectively carrying out power amplification with preset gain on more than two paths of carriers with different frequencies before the carriers with more than two paths of different frequencies are combined.
4. An uplink carrier aggregation device, comprising a combiner, a wideband power amplifier, a frequency divider, a filter, and a transmitter, wherein:
the combiner is used for combining more than two paths of carriers with different frequencies;
the broadband power amplifier is connected with the combiner and is used for amplifying the power of the combined carrier;
the frequency divider is connected with the broadband power amplifier and is used for separating the combined carrier subjected to power amplification into more than two paths of carriers;
the filter is connected with the frequency divider and is used for independently filtering each separated carrier;
the transmitter is connected with the filter and used for transmitting all the filtered carriers;
the device also comprises an adjustable gain amplifier, wherein the adjustable gain amplifier is connected with the combiner and is used for respectively carrying out power amplification with preset gain on more than two paths of carriers with different frequencies before the carriers with more than two paths of different frequencies are combined;
the device also comprises a first directional coupler, a first power detection unit and a first power control unit, wherein the first directional coupler is connected with the broadband power amplifier and the frequency divider and is used for sampling and picking up the transmission power of each path of carrier in the combined carriers after power amplification; the first power detection unit is connected with the first directional coupler and used for carrying out down-conversion processing on the transmission power picked up by sampling according to carriers to obtain first carrier power of each path of carrier; the first power control unit is connected with the first power detection unit and the adjustable gain amplifier and is used for adjusting the predetermined gain according to the first carrier power;
the device further comprises a second directional coupler, a second power detection unit and a second power control unit, wherein the second directional coupler is connected with the filter and is used for sampling and picking up the transmission power of each path of carrier wave after filtering; the second power detection unit is connected with the second directional coupler and used for carrying out down-conversion processing on the sampled and picked transmitting power according to the carrier waves to obtain second carrier wave power of each channel of carrier waves after filtering; the second power control unit is connected with the second power detection unit and the adjustable gain amplifier, and is configured to adjust the predetermined gain according to the second carrier power.
5. The apparatus of claim 4, further comprising a collision detection unit configured to remove the carrier combination consisting of the two or more carriers with different frequencies from the available combination when it is determined that the carrier combination would generate a spurious spectrum that strongly interferes with other frequency bands.
6. A storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method of any of claims 1 to 2 when executed.
7. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810106951.5A CN110138520B (en) | 2018-02-02 | 2018-02-02 | Uplink carrier transmitting method and device and uplink carrier aggregation device |
| PCT/CN2019/074372 WO2019149267A1 (en) | 2018-02-02 | 2019-02-01 | Uplink carrier transmission method and apparatus, and uplink carrier aggregation apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810106951.5A CN110138520B (en) | 2018-02-02 | 2018-02-02 | Uplink carrier transmitting method and device and uplink carrier aggregation device |
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| CN110138520A CN110138520A (en) | 2019-08-16 |
| CN110138520B true CN110138520B (en) | 2022-04-29 |
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| WO (1) | WO2019149267A1 (en) |
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| KR20160027302A (en) * | 2014-08-28 | 2016-03-10 | 한국전자통신연구원 | RF transmitter supporting carrier aggregation and envelope tracking |
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| CN106160674A (en) * | 2009-12-21 | 2016-11-23 | 大力系统有限公司 | For improving the system of the isolation between transmitter and receiver |
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| CN110138520A (en) | 2019-08-16 |
| WO2019149267A1 (en) | 2019-08-08 |
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