WO2016145937A1

WO2016145937A1 - Multichannel wideband channel simulation method and device

Info

Publication number: WO2016145937A1
Application number: PCT/CN2016/070639
Authority: WO
Inventors: 刘喜林; 陆海涛; 马伟; 张金龙; 张锐; 李赟
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-03-19
Filing date: 2016-01-12
Publication date: 2016-09-22
Also published as: CN106034002A

Abstract

Disclosed are a multichannel wideband channel simulation method and device. The method comprises: creating, at a back-end manipulation unit, a wireless channel scenario, and controlling, based on the created wireless channel scenario, a channel processing unit; and simulating the wireless channel, by the channel processing unit under control of the back-end manipulation unit, to process a radio-frequency transceiving signal of a communication device accessed by a multichannel radio-frequency processing unit.

Description

Multi-channel wideband channel simulation method and device

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a multi-channel wideband channel simulation method and apparatus.

Background technique

In wireless communication systems, when signals are transmitted in wireless space, the scenes of signal propagation are very different. Radio waves will be affected by atmospheric effects and ground effects in spatial transmission, resulting in receivers receiving levels over time. Change and constant fluctuations, that is, decline. The size of the fading is related to the climatic conditions and the length of the station. The appearance of fading will cause the signal to be distorted. In order to better evaluate the performance of wireless communication devices, it is often necessary to perform repeated experiments in the actual communication environment, which will inevitably consume a lot of manpower and resources. In order to shorten the development cycle, save development costs, and more easily and easily evaluate the performance of wireless communication devices, it is often desirable to simulate possible signal propagation channels when testing communication systems in the laboratory for testing in the laboratory environment. System performance under the scene.

Due to the complexity and variety of signal propagation scenarios, current channel analog instruments are limited by methods and techniques, and most of them lack near real and real-time scenarios. At the same time, the existing channel analog instruments generally adopt the radio-baseband-radio frequency processing mode, and are limited by technology, and the number of channels that can be provided is generally small, usually a single channel, and the radio frequency and baseband are generally integrated, and the radio frequency unit Leakage between each other is inevitable.

Summary of the invention

The technical problem to be solved by the present invention is to provide a multi-channel wideband channel simulation method and device, and provide more channel simulation channel numbers, so that the supported wireless network is larger and more connected. Near real, intuitive spatial wireless channel scenario.

The embodiment of the invention adopts the following technical solutions:

In a first aspect, an embodiment of the present invention provides a multi-channel wideband channel simulation method, including:

Creating a wireless channel scenario in the background control unit, and controlling the channel processing unit based on the created wireless channel scenario;

The channel processing unit processes the radio frequency transceiving signal of the communication device accessed by the multi-channel radio frequency processing unit under the control of the background control unit.

In an embodiment of the present invention, creating a wireless channel scenario in the background control unit includes: performing wireless channel scene data import, wireless channel scene display, wireless channel information management, and communication device management in a background control unit.

In an embodiment of the present invention, the number of channel processing units is one or more; any channel processing unit includes: a main control module, and one or more channel processing channels;

The single or multiple channel processing units are configured to process the radio frequency transceiver signals of the communication device accessed by the multi-channel radio frequency processing unit under the control of the background control unit, including:

The main control module performs unified control on each channel processing channel based on the control script downloaded from the background control unit to simulate the radio channel to process the radio frequency transceiving signal of the communication device accessed by the multi-channel radio processing unit.

In an embodiment of the present invention, the channel processing channel includes: a channel data generating module, a channel processing module, and an access module;

The main control module performs unified control on each channel processing channel based on the control script downloaded from the background control unit to simulate the radio channel to process the radio frequency transceiving signal of the communication device accessed by the multi-channel radio processing unit, including:

In any channel processing channel, the main control module performs the following operations according to the control script: sending channel parameters to the channel data generating module, transmitting channel data to the channel processing module, and transmitting forwarding control information to the access module;

The channel data generating module generates corresponding channel data according to the channel parameter sent by the main control module, and sends the channel data to the channel processing module; the channel processing module generates the channel data sent by the main control module or the channel data generating module. The channel data is applied to the baseband data forwarded by the access module to perform channel processing on the baseband data, and the baseband data processed by the channel is sent back to the access module; and the access module performs the forwarding control information according to the control unit. Transmitting the baseband data sent from the multi-channel radio frequency processing unit to the channel processing module, and sending the channel-processed baseband data sent back by the channel processing module back to the multi-channel according to the forwarding control information sent by the main control unit RF processing unit.

In an embodiment of the present invention, when a channel processing unit includes multiple channel processing channels, access modules in each channel processing channel are connected to each other, and each channel data generating module and each channel processing module perform operations. The process is based on distributed computing implementation;

The main control module performs unified control on each channel processing channel based on the control script downloaded from the background control unit to simulate the radio channel to process the radio frequency transceiving signal of the communication device accessed by the multi-channel radio processing unit, and further includes:

Any access module forwards the baseband data sent from the multi-channel radio processing unit to other access modules according to the forwarding control information sent by the main control unit, and forwards the data to the corresponding channel processing module through other access modules, and according to the main The forwarding control information sent by the control unit forwards the channel-processed baseband data sent back by the channel processing module to other access modules, and sends the data back to the multi-channel RF processing unit through other access modules.

In an embodiment of the present invention, the access modules in each channel processing channel are connected to each other, including:

A broadband data exchange network exists between access modules in each channel processing channel, and data is exchanged based on the switching network.

In an embodiment of the present invention, the operation processes in each channel data generating module and each channel processing module are implemented based on distributed computing, including:

A broadband data exchange network is established between each channel data generating module and each channel processing module, and distributed computing of the computing process is implemented based on the switching network.

In an embodiment of the present invention, the number of multi-channel radio frequency processing units is one or more;

Any multi-channel RF processing unit includes: a remote transmission module, a baseband data interface module, and two or more radio frequency transceiver channels, wherein each of the RF transceiver channels includes a radio frequency transmission path and a radio frequency receiving path, and each radio frequency transmission channel The path and each RF receive path are connected to the corresponding communication device; for any RF transceiver channel:

The RF transceiver channel transmits the baseband data to the baseband data interface module after the transmission signal of the communication device is attenuated, downconverted, filtered, and analog-to-digital converted, and the baseband data interface module transmits the received baseband data to the channel through the remote transmission module. unit;

The channel-processed baseband data delivered by the channel processing unit is transmitted to the baseband data interface module through the remote transmission module, and the baseband data interface module transmits the received baseband data to the radio frequency transceiver channel, and the baseband data passes through the RF transceiver channel in turn. Digital-to-analog conversion, attenuation, filtering, up-conversion, and attenuation are input to the communication device as received signals.

In an embodiment of the invention, the remote transmission module includes: an optical fiber.

In a second aspect, the embodiment of the present invention further provides a multi-channel wideband channel emulation device, including:

a background control unit configured to create a wireless channel scenario and control the channel processing unit based on the created wireless channel scenario;

The channel processing unit is configured to: under the control of the background control unit, the analog wireless channel processes the radio frequency transceiver signal of the communication device accessed by the multi-channel radio frequency processing unit;

The multi-channel RF processing unit is configured to connect to the communication device and transmit the RF transceiver signal of the communication device.

With the above technical solution, the present invention has at least the following advantages:

The multi-channel wideband channel simulation method and device provided by the embodiments of the present invention aim to change the limitation of the existing wireless channel analog instrument channel number and the small network size that can be processed, and the present invention More channels can be provided to make the supported wireless networks larger and closer to real, intuitive spatial wireless channel scenarios. The invention overcomes the defects of the integration of the radio frequency baseband of the existing wireless channel analog instrument by introducing the remote transmission module, so that the radio frequency part of the wireless channel simulator can be separated from the baseband, so that the wireless channel simulation instrument has greater adaptability to the test environment. Significant improvements in test scenarios, test techniques, and test environment conditions.

DRAWINGS

1 is a flowchart of a multi-channel wideband channel simulation method according to a first embodiment of the present invention;

2 is a schematic structural diagram of a device for simulating a multi-channel wideband channel according to a third embodiment of the present invention;

3 is a schematic structural diagram of a structure of a broadband wireless channel simulation apparatus according to a fourth embodiment of the present invention;

4 is a schematic diagram showing the internal structure of a single channel processing unit according to a fourth embodiment of the present invention;

FIG. 5 is a schematic diagram showing the internal structure of any radio frequency transceiver channel in a multi-channel radio frequency processing unit according to a fourth embodiment of the present invention.

detailed description

The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

The first embodiment of the present invention provides a multi-channel wideband channel simulation method, as shown in FIG. 1, including the following specific steps:

Step S101, creating a wireless channel scenario in the background control unit, and controlling the channel processing unit based on the created wireless channel scenario;

Here, the background control unit may be implemented by a computing device such as a processor in a personal computer (PC). In a specific implementation process, the processor may be a central processing unit (CPU), a microprocessor (MPU), a digital device. Signal processor (DSP) or field programmable gate array (FPGA).

Specifically, in step S101, creating a wireless channel scenario in the background control unit includes: performing radio channel scene data import, wireless channel scene display, wireless channel information management, and communication device management in the background control unit.

Step S102: The channel processing unit processes the radio frequency transceiver signal of the communication device accessed by the multi-channel radio frequency processing unit under the control of the background control unit; the communication device includes: a base station and a wireless communication terminal.

Here, the channel processing unit may be implemented by a channel processing device, such as a processor in a channel processor. In a specific implementation process, the processor may be a central processing unit (CPU), a microprocessor (MPU), or a digital signal. Processor (DSP) or field programmable gate array (FPGA).

Specifically, the number of channel processing units is one or more; any channel processing unit includes: a main control module, and one or more channel processing channels;

Further, each channel processing channel includes: a channel data generating module, a channel processing module, and an access module;

The channel data generating module generates a corresponding channel number according to the channel parameter sent by the main control module. And transmitting the channel data to the channel processing module; the channel processing module applies the channel data sent by the main control module or the channel data generated by the channel data generating module to the baseband data forwarded by the access module to baseband data. Performing channel processing, and transmitting the channel-processed baseband data back to the access module; the access module forwards the baseband data sent from the multi-channel radio frequency processing unit to the channel processing module according to the forwarding control information sent by the main control unit. And transmitting the channel-processed baseband data sent back by the channel processing module to the multi-channel radio frequency processing unit according to the forwarding control information sent by the main control unit.

Preferably, the channel data generation module and the operation process in the channel processing module are implemented based on distributed computing.

Further, in this embodiment, the number of multi-channel radio frequency processing units is one or more;

Any of the multi-channel RF processing units, including: a remote transmission module, a baseband data interface module, and two or more radio frequency transceiver channels, wherein the remote transmission module includes: an optical fiber. Each radio frequency transceiver channel includes a radio frequency transmission path and a radio frequency receiving path, and each radio frequency transmission path and each radio frequency receiving path are connected with corresponding communication devices; for any radio frequency transceiver channel:

The RF transceiver channel transmits the baseband data to the baseband data interface module after the transmission signal of the communication device is attenuated, downconverted, filtered, and analog-to-digital converted, and the baseband data interface module transmits the received baseband data to the channel through the remote transmission module. Access module of the unit;

The channel-processed baseband data delivered by the access module of the channel processing unit is transmitted to the baseband data interface module through the remote transmission module, and the baseband data interface module transmits the received baseband data to the radio frequency transceiver channel, and the baseband data is transmitted and received in the radio frequency. The channel is subjected to digital-to-analog conversion, attenuation, filtering, up-conversion, and attenuation, and then input as a received signal to the communication device.

The second embodiment of the present invention provides a method for simulating a multi-channel wideband channel. The method in this embodiment is substantially the same as the first embodiment, and the difference is:

In the case where any channel processing unit includes multiple channel processing channels, the access modules in each channel processing channel are connected to each other, and specifically, between the access modules in each channel processing channel A switching network is formed, and data is exchanged based on the switching network.

The operation process in each channel data generating module and each channel processing module is implemented based on distributed computing. Specifically, each channel data generating module and each channel processing module have a broadband data exchange network, based on the exchange. The network implements distributed computing of computing processes.

In this embodiment, the main control module performs unified control on each channel processing channel based on the control script downloaded from the background control unit to simulate the radio channel to process the radio frequency transceiving signal of the communication device accessed by the multi-channel radio frequency processing unit. ,Also includes:

The third embodiment of the present invention corresponds to the first embodiment or the second embodiment. This embodiment introduces a multi-channel wideband channel emulation device, as shown in FIG. 2, including the following components:

The background control unit 100 is configured to create a wireless channel scenario, and control the channel processing unit based on the created wireless channel scenario;

The channel processing unit 200 is configured to process the radio frequency transceiving signal of the communication device accessed by the multi-channel radio frequency processing unit 300 under the control of the background manipulation unit 100; the communication device includes: a base station and a wireless communication terminal ;

The multi-channel radio frequency processing unit 300 is configured to connect to the communication device and transmit the radio frequency transceiving signal of the communication device.

The fourth embodiment of the present invention is based on the above embodiments, and an application example of the present invention is described with reference to Figs.

As shown in FIG. 3, the broadband wireless channel simulation apparatus of this embodiment includes: a background control The number of multi-channel radio frequency processing channels in this embodiment is N, N ≥ 2, using a computer (similar to the background control unit of the previous embodiment), one or more channel processing units, and one or more multi-channel radio processing units. . The RF input and output ports of the multi-channel RF processing multi-channel unit can be connected to the wireless base station (eNodeB) and the user equipment (UE) for analog test, and the RF input and output ports can be physically separated or combined. This embodiment takes the Long Term Evolution (LTE) system as an example.

The control software carried by the computer is used to implement functions such as wireless scene data import, wireless scene creation, scene display, channel information management, and device management, and simultaneously complete data interaction with the channel processing unit.

The channel processing unit is configured to perform data interaction with the manipulation software, perform scene-based channel data generation, and apply channel data to corresponding baseband data.

Taking a single channel processing unit as an example, its internal structure diagram is as shown in FIG. 4, and includes a main control module, a plurality of channel data generating modules, a plurality of channel processing modules, and a plurality of access modules. The main control module completes the data interaction with the control software and performs unified management on other modules. The channel data generation module generates corresponding channel data according to the channel parameters sent by the control software, and delivers the channel data to the channel processing module. The channel processing module acts on the corresponding baseband data according to the channel data sent by the main control module or according to the channel data generated by the channel data generating module, and performs the overchannel processing on the baseband data. The access module receives the baseband data sent by the corresponding multi-channel RF processing unit, and sends the received baseband data to the corresponding channel processing module according to the forwarding control information sent by the main control module, and simultaneously passes the channel through the channel processing module. The processed baseband data is sent to the corresponding multi-channel RF processing unit according to the format requirements.

Both the channel data generation module and the channel processing module need to have rich and high-speed multiply-accumulate units to meet the requirements of large data volume high-speed multiply-accumulate operation and distributed computing; each channel processing module and each channel data generation module need to have Enough broadband data exchange network to meet the large data volume exchange requirements of distributed computing.

Each access module is designed with a large number of switching networks. Each access module can send the baseband signals sent by the multi-channel RF processing unit connected to itself to other access modules according to the forwarding control information sent by the main control module. And sending to the corresponding channel processing module through other access modules, and simultaneously transmitting the channel-processed baseband data sent by the channel processing module to other access modules according to the forwarding control information sent by the main control module, and The ingress module is sent to the corresponding multi-channel RF processing unit.

The multi-channel radio frequency processing unit is generally multiple in the device to facilitate access to more base station devices and user equipment UEs.

Any multi-channel RF processing unit, including: optical fiber, baseband data interface module, and M radio frequency transceiver channels, M≥2. Each of the RF transceiver channels includes a plurality of independent RF transmission paths and a plurality of independent RF receiving channels, and each of the RF transmission paths and each of the RF receiving channels are connected to corresponding communication devices for completing the multi-channel RF. Signal and baseband signal conversion, each RF channel supports wide frequency band, high bandwidth, and frequency and bandwidth can be matched, and RF to baseband or baseband to RF conversion should be as high fidelity as possible.

The internal structure diagram of any one of the multi-channel radio frequency processing units is shown in FIG. 5, and includes two parts: a radio frequency processing part and a baseband processing, and mainly implements mutual conversion from radio frequency to baseband, and the radio frequency processing part generally includes The attenuator, the up-down converter, the filter and the AD/DA, etc., the input and output ports of the RF channel are connected to the relevant base station device or the user equipment UE, and the baseband processing part exchanges the baseband signals through the baseband data interface module, the optical fiber transmission line and the channel processing unit.

The multi-channel wideband channel simulation method and apparatus of the embodiment of the invention are used for simulating a wireless channel on a large scale, accurately, infinitely close to reality. The invention aims to change the limited number of channels of the existing wireless channel analog instrument and the small size of the network that can be processed, and the invention can provide more channels, and the size of the supported wireless network is larger, closer to the real and intuitive space wireless. Channel scenario. By introducing a remote transmission module such as an optical fiber, the radio frequency portion of the wireless channel simulator can be separated from the baseband, thereby overcoming the defect of the integration of the radio frequency baseband of the existing wireless channel simulation instrument. As a result, the wireless channel analog instrument has greater adaptability to the test environment, resulting in significant improvements in test scenarios, test techniques, and test environment conditions.

The technical means and functions of the present invention for achieving the intended purpose can be more deeply and specifically understood by the description of the specific embodiments. However, the accompanying drawings are only for the purpose of illustration and description, and are not intended to limit.

Industrial applicability

In the embodiment of the present invention, a wireless channel scenario is created in the background control unit, and the channel processing unit is controlled based on the created wireless channel scenario; the channel processing unit controls the wireless channel pair by the multi-channel RF processing unit under the control of the background control unit. The radio frequency transceiver signal of the accessed communication device is processed; thus, the defect of the radio frequency baseband integration of the existing wireless channel analog instrument is overcome, so that the radio frequency part of the wireless channel simulator can be separated from the baseband, thereby enabling the wireless channel simulation instrument to have Greater test environment adaptability, resulting in significant improvements in test scenarios, test techniques, and test environment conditions.

Claims

A multi-channel wideband channel simulation method includes:

Creating a wireless channel scenario in the background control unit, and controlling the channel processing unit based on the created wireless channel scenario;

The channel processing unit processes the radio frequency transceiving signal of the communication device accessed by the multi-channel radio frequency processing unit under the control of the background control unit.
The multi-channel wideband channel simulation method according to claim 1, wherein the creating a wireless channel scene in the background control unit comprises: performing radio channel scene data import, wireless channel scene display, wireless channel information management, and Communication equipment management.
The multi-channel wideband channel emulation method according to claim 1, wherein the number of channel processing units is one or more; any channel processing unit comprises: a main control module, and one or more channel processing channels;

The single or multiple channel processing units are configured to process the radio frequency transceiver signals of the communication device accessed by the multi-channel radio frequency processing unit under the control of the background control unit, including:

The main control module performs unified control on each channel processing channel based on the control script downloaded from the background control unit to simulate the radio channel to process the radio frequency transceiving signal of the communication device accessed by the multi-channel radio processing unit.
The multi-channel wideband channel emulation method according to claim 3, wherein the channel processing channel comprises: a channel data generating module, a channel processing module, and an access module;

The main control module performs unified control on each channel processing channel based on a control script downloaded from the background control unit to simulate a radio channel to process radio frequency transceiving signals of the communication device accessed by the multi-channel radio frequency processing unit, including:

In any channel processing channel, the main control module performs the following operations according to the control script: transmitting channel parameters to the channel data generating module, transmitting channel data to the channel processing module, and Sending forwarding control information to the access module;

The channel data generating module generates corresponding channel data according to the channel parameter sent by the main control module, and sends the channel data to the channel processing module; the channel processing module generates the channel data sent by the main control module or the channel data generating module. The channel data is applied to the baseband data forwarded by the access module to perform channel processing on the baseband data, and the baseband data processed by the channel is sent back to the access module; and the access module performs the forwarding control information according to the control unit. Transmitting the baseband data sent from the multi-channel radio frequency processing unit to the channel processing module, and sending the channel-processed baseband data sent back by the channel processing module back to the multi-channel according to the forwarding control information sent by the main control unit RF processing unit.
The multi-channel wideband channel emulation method according to claim 4, wherein, when the channel processing unit includes a plurality of channel processing channels, the access modules in each channel processing channel are connected to each other, each channel data generating module and each The operations in the channel processing module are all based on distributed computing;

The main control module performs unified control on each channel processing channel based on the control script downloaded from the background control unit to simulate the radio channel to process the radio frequency transceiving signal of the communication device accessed by the multi-channel radio frequency processing unit, and further includes:

Any access module forwards the baseband data sent from the multi-channel radio processing unit to other access modules according to the forwarding control information sent by the main control unit, and forwards the data to the corresponding channel processing module through other access modules, and according to the main The forwarding control information sent by the control unit forwards the channel-processed baseband data sent back by the channel processing module to other access modules, and sends the data back to the multi-channel RF processing unit through other access modules.
The multi-channel wideband channel emulation method according to claim 5, wherein the access modules in each channel processing channel are connected to each other, including:

A broadband data exchange network exists between access modules in each channel processing channel, and data is exchanged based on the switching network.
The multi-channel wideband channel emulation method according to claim 5, wherein the operation processes in each channel data generating module and each channel processing module are implemented based on distributed computing, including:

A broadband data exchange network is established between each channel data generating module and each channel processing module, and distributed computing of the computing process is implemented based on the switching network.
The multi-channel wideband channel emulation method according to claim 4, wherein the number of multi-channel radio frequency processing units is one or more;

Any multi-channel RF processing unit includes: a remote transmission module, a baseband data interface module, and two or more radio frequency transceiver channels, wherein each of the RF transceiver channels includes a radio frequency transmission path and a radio frequency receiving path, and each radio frequency transmission channel The path and each of the RF receiving paths are connected to corresponding communication devices;

For any RF transceiver channel: the RF transceiver channel transmits the baseband data to the baseband data interface module after the transmission signal of the communication device is attenuated, downconverted, filtered, and analog-to-digital converted, and the baseband data interface module passes the received baseband data. The remote transmission module transmits to the channel processing unit;

The channel-processed baseband data delivered by the channel processing unit is transmitted to the baseband data interface module through the remote transmission module, and the baseband data interface module transmits the received baseband data to the radio frequency transceiver channel, and the baseband data passes through the RF transceiver channel in turn. Digital-to-analog conversion, attenuation, filtering, up-conversion, and attenuation are input to the communication device as received signals.
The multi-channel wideband channel emulation method according to claim 8, wherein the remote transmission module comprises: an optical fiber.
A multi-channel wideband channel simulation device, comprising:

a background control unit configured to create a wireless channel scenario and control the channel processing unit based on the created wireless channel scenario;

a channel processing unit configured to simulate a wireless channel pair under the control of a background control unit The radio frequency transceiver signal of the communication device accessed by the multi-channel radio frequency processing unit is processed;

The multi-channel RF processing unit is configured to connect to the communication device and transmit the RF transceiver signal of the communication device.