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Multi-scene channel transmission simulation method and device based on convolutional codes

A technology of channel transmission and analog method, which is applied in the direction of transmission monitoring, transmission system, digital transmission system, etc., and can solve problems such as adverse effects of transmission parameter configuration

Active Publication Date: 2022-01-28
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, most of the existing channel emulators only focus on the transmission characteristics of the wireless channel or the simulation of a single link in it, ignoring other parts such as uplink and downlink baseband processing. The impact on the performance of the communication system, thus adversely affecting the scenario networking planning, resource scheduling, transmission parameter configuration, etc.

Method used

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  • Multi-scene channel transmission simulation method and device based on convolutional codes
  • Multi-scene channel transmission simulation method and device based on convolutional codes
  • Multi-scene channel transmission simulation method and device based on convolutional codes

Examples

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Embodiment 1

[0078] In one embodiment of the present invention, for a certain high-rise corridor environment, the transmission parameters are selected as follows:

[0079] 1) 30khz subcarrier spacing, scheduling delay 500us; 2) 25M carrier bandwidth; 3) 16QAM modulation; 4) Convolutional code constraint depth is 9; 5) Coding efficiency is 2 / 3; 6) 13db SNR;

[0080] The convolutional channel coding configuration in the downlink channel is (2, 3, 1, 6), the coding efficiency is 2 / 3, and the coding matrix Elements are in octal. The relationship between the output sequence o1o2o3 and the number of storage stages is

[0081]

[0082] The interleaving frame length is selected as 8 bits, a total of 8 groups of frames, and 64 bits are interleaved each time. A 10-bit cell ID and a 15-bit pseudo-random sequence form a 25-bit scrambling code sequence, and 25 bits are inserted into a 0 bit every 4 bits at intervals to form a 32-bit scrambling code sequence, and the scrambling code sequence and...

Embodiment 2

[0087] This embodiment takes a high-rise corridor as a typical scene, but is not limited to this scene. The specific implementation details of the channel transmission simulator, that is, the simulation device, are as follows:

[0088] Parameter configuration in the transmission parameter extraction module: According to the environmental requirements between high-rise corridors 1) the transmission rate is greater than 20mbps; 2) the tolerable scheduling delay is 800us; 3) the bandwidth is less than 25M. From this, roughly select a parameter configuration combination: 30khz subcarrier spacing, bandwidth 20M, modulation mode 16QAM, convolutional code depth 6, coding efficiency 1 / 3, signal-to-noise ratio 12db, such as image 3 the choices shown;

[0089] Downlink channel processing module: After extracting the transmission parameters, perform downlink data processing.

[0090] A set of image data is randomly selected, the pixel ratio is 99*80, and each pixel is 8 bits wide, and a...

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Abstract

The invention discloses a multi-scene channel transmission simulation method and device based on a convolutional code. The method comprises the following steps: S1, selecting a group of channel transmission parameters according to a scene, and randomly selecting a group of images as test data; S2, processing test data according to the selected channel transmission parameters; S3, acquiring a channel impulse response in an actual scene, performing convolution on the test data processed in the step S2 and the channel impulse response, superimposing noise power, and simulating channel transmission; S4, performing inverse processing of the step S2 on the test data transmitted through the analog channel; S5, counting the error rate, the transmission rate and the consumed time of the test data transmitted through the steps S2-S4. According to the invention, on the basis of channel characteristics, uplink and downlink baseband processing is superposed, channel transmission is simulated, and proper reference is provided for a communication system through transmission performance indexes.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a multi-scene channel transmission simulation method and device based on convolutional codes. Background technique [0002] With the commercialization and rapid development of the fifth-generation mobile communication technology (5G), people have higher and higher requirements for networking in various scenarios. 5G low power consumption, large connection, low delay, high reliability and Internet of Things related technologies The development of the Internet of Things has made sufficient technical preparations for the Internet of Everything. Various application scenarios continue to expand and sink, such as smart cities, remote environmental monitoring, industrial applications and control, etc. are all in the process of rapid development. The most critical layer is getting more and more attention. [0003] Most of the existing channel emulators only focus on the transmissio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/391H04B17/309H04L1/00
CPCH04B17/391H04B17/309H04L1/0059H04L1/0071Y02D30/70
Inventor 刘洋李凯亮
Owner JIANGNAN UNIV
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