A Method of Improving the Accuracy of Received Signal Simulation Based on Baseband Equivalent Channel Model
A technology for receiving signals and channel models, applied in transmission monitoring, electrical components, transmission systems, etc., can solve problems such as inability to actually receive signal simulation, and inability to evaluate the performance of demodulation and decoding algorithms
Active Publication Date: 2018-02-06
XIAN INSTITUE OF SPACE RADIO TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Since the factors that cause the waveform distortion of the received signal considered in the simulation are not comprehensive, the actual received signal cannot be accurately simulated, and the performance of the overall demodulation and decoding algorithm at the receiving end cannot be evaluated.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0039] The basic idea of the present invention is to use 4 serial modules to simulate the process of the baseband signal passing through the baseband equivalent channel, taking into account the influence of various factors that cause waveform distortion after the baseband signal passes through the baseband equivalent channel, including multiple wireless channels. Diameter, carrier frequency deviation and phase deviation, free space noise and thermal noise, sampling deviation. Among them, the method of up-sampling first and then down-sampling is used to simulate the multipath effect, and the Farrow interpolation filter is used to simulate the effect of sampling deviation.
[0040] A method for improving the simulation accuracy of the received signal based on the baseband equivalent channel model is proposed. The baseband equivalent channel experienced by the digital baseband signals at the receiving and transmitting ends is modeled through the following steps:
[0041] (1) Multipa...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a method for improving the simulation accuracy of received signals based on the baseband equivalent channel model. In the wireless communication system, the digital baseband signal at the transmitting end to the digital baseband signal at the receiving end has undergone digital up-conversion, DA conversion, RF transmission channel, transmitting antenna, wireless channel, receiving antenna, RF receiving channel, AD conversion, digital down-conversion and other processes. The whole process can be regarded as that the digital baseband signal at the transmitting end passes through a channel, resulting in distortion, and finally the receiving end obtains the distorted digital baseband signal, which is also called the baseband equivalent channel. The invention models the baseband equivalent channel, improves the accuracy of receiving signal simulation, and ensures the performance of the demodulation algorithm selected by the system on the actual receiving signal. The invention can be applied to the link-level simulation of regenerative forwarding system and transparent forwarding system in satellite communication.
Description
Technical field [0001] The invention belongs to the field of wireless communication, and relates to the modeling and simulation of the baseband equivalent channel experienced by the digital baseband signal at the transmitting end to the digital baseband signal at the receiving end, in order to achieve the purpose of improving the simulation accuracy of the received signal, and can be applied to regeneration and forwarding in satellite communication. Link-level simulation of the system and transparent forwarding system. Background technique [0002] In the design of wireless communication systems, it is necessary to select a suitable demodulation and decoding algorithm for the receiving end to meet the BER index required by the system. To achieve this goal, in the first design simulation, it is necessary to generate a digital baseband signal that is highly similar to the actual received signal, that is, to accurately simulate the received signal, to ensure that the selected demodu...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/391H04B17/40
Inventor 张映南孙垂强张鹏张璐楼大年张传林
Owner XIAN INSTITUE OF SPACE RADIO TECH