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CN-121985363-A - 2.4G frequency band radio frequency link estimation method of wireless access point

CN121985363ACN 121985363 ACN121985363 ACN 121985363ACN-121985363-A

Abstract

The invention relates to the technical field of radio frequency design of wireless access points, in particular to a 2.4G frequency band radio frequency link estimation method of a wireless access point, which is applied to wireless access point hardware adopting a high-pass MIAMI series Wi-Fi7 chip. The invention creates a computable framework for transmitting the abstract performance index of the chip reference design to the physical hardware realization, which has the value of not only eliminating the gap between simulation and actual measurement, but also converting the radio frequency link performance into a design variable capable of being quantitatively regulated by data modeling, thereby realizing the one-time design convergence of the hardware scheme under the complex constraint of a Wi-Fi7 high-density radio frequency system.

Inventors

  • LIU CHUNLIANG
  • CHEN JIE
  • LIU QIANYU
  • ZHU MIN
  • ZHANG JIAO

Assignees

  • 太仓市同维电子有限公司
  • 东南大学

Dates

Publication Date
20260505
Application Date
20260122

Claims (10)

  1. 1. The 2.4G frequency band radio frequency link estimation method of the wireless access point is characterized by being applied to wireless access point hardware adopting a high-pass MIAMI series Wi-Fi7 chip, and comprises the following steps of: decomposing the radio frequency link into functional units, wherein the functional units comprise a public radio frequency matching module, a filter module, a radio frequency front-end module and an antenna module; collecting quantization parameter indexes according to the functional units, wherein the quantization parameters comprise link attenuation values and temperature characteristic indexes; Inputting the collected quantitative parameter indexes into a preset radio frequency link estimation table for comparison analysis, and generating a performance difference report; and identifying design defects and directionally optimizing radio frequency device model selection or circuit board layout based on the performance difference report.
  2. 2. The method of claim 1, wherein the common rf matching module comprises an impedance matching element and transmission line loss parameters, the filter module comprises a second order filter insertion loss index of the receiving end, the rf front-end module comprises an rf front-end chip gain and linearity index, and the antenna module comprises antenna efficiency and radiation characteristic parameters.
  3. 3. The method of claim 1, wherein the quantization parameter indicator comprises an attenuation value for each transmit link, an attenuation value for each receive link, a multi-link operation isolation budget, a high temperature environmental performance degradation value, and a mass production uniformity bias value.
  4. 4. The method for estimating a 2.4G band radio frequency link of a wireless access point according to claim 1, wherein said radio frequency link estimation table comprises: a reference parameter column for storing a high-pass reference design standard value; proposal parameter columns, storing actual measurement values of a scheme to be evaluated; a total radiated power budget field including a transmit power value in a particular wireless mode; an omni-directional sensitivity budget field including a receive sensitivity value in a particular wireless mode.
  5. 5. The method for estimating a 2.4G band radio frequency link of a wireless access point of claim 4 wherein said total radiated power budget field comprises a dual stream transmit power value in an enhanced high throughput 20MHz bandwidth 0-order modulation coding scheme mode and said omni-directional sensitivity budget field comprises a dual stream receive sensitivity value in an enhanced high throughput 40MHz bandwidth 11-order modulation coding scheme mode.
  6. 6. The method for estimating a 2.4G band radio frequency link of a wireless access point according to claim 1, wherein said step of comparing comprises: transversely comparing the radio frequency front end module parameters of the scheme to be evaluated with the reference scheme; Longitudinally comparing the parameters of the filters under different circuit board layouts; and calculating a radio frequency transmitting power difference value and a receiving sensitivity offset value.
  7. 7. The method for estimating a 2.4G band radio frequency link of a wireless access point according to claim 6, wherein said step of calculating a radio frequency transmit power difference value comprises: in the mode of the enhanced high throughput 40MHz bandwidth 13-order modulation coding scheme, the transmission power value of the proposed scheme is subtracted by the corresponding value of the reference scheme, and the high temperature degradation compensation value minus 1 dB and the mass production deviation compensation value minus 0.5 dB are superposed.
  8. 8. The method for estimating a 2.4G band radio frequency link of a wireless access point according to claim 1, wherein said step of directional optimization comprises: When the multi-link operation isolation budget is less than minus 52 dB, a radio frequency front end shielding structure is added; when the attenuation value of the receiving link is larger than minus 1.58 dB, adjusting the impedance matching network of the circuit board; The low insertion loss filter is replaced when the omnidirectional sensitivity budget is greater than minus 96.96 db milliwatts in the enhanced high throughput 20MHz bandwidth 0-order modulation coding scheme mode.
  9. 9. The method of estimating a 2.4G band radio frequency link of a wireless access point according to claim 1, wherein said estimation method is performed in a hardware design pre-stage for evaluating the following design variables: compatibility relation between different radio frequency front end module types and filter types; The influence coefficient of the radio frequency wiring length change on the attenuation value of the transmitting link; The contribution weight of the antenna layout position to the total radiated power budget.
  10. 10. The method for estimating a 2.4G band radio frequency link of a wireless access point according to claim 9, wherein said step of verifying a compatibility relationship comprises: Calculating the interference power difference value of the combination of the specific radio frequency front end module and the reference filter; Verifying that the transmitting power of a specific radio frequency front-end module in an enhanced high-throughput 40MHz bandwidth 13-order modulation coding scheme mode reaches a threshold value of 22.18 dB and mW; and outputting a list of radio frequency front-end module and filter combinations meeting the requirement that the omnidirectional sensitivity budget is less than or equal to minus 95.87 decibel milliwatts.

Description

2.4G frequency band radio frequency link estimation method of wireless access point Technical Field The invention relates to the technical field of radio frequency design of wireless access points, in particular to a 2.4G frequency band radio frequency link estimation method of a wireless access point. Background When a 2.4G frequency band radio frequency link of a Wi-Fi 7 wireless access point is constructed by adopting a high-pass MIAMI series chip, a core challenge of hardware design is that a radio frequency performance evaluation system lacks a dynamic coupling mechanism with actual physical realization. The traditional scheme relying on the simulation tool chain, such as radio frequency link simulation, impedance matching simulation and the like, can construct a theoretical model, but is essentially based on idealized parameters and static environment assumptions, and cannot effectively map the actual influence of nonlinear variables such as device type selection differences, PCB layout changes, environmental disturbance and the like on radio frequency performance. Particularly, when the scenes such as compatibility of a radio frequency Front End Module (FEM) and a filter, multi-link isolation budget, temperature drift effect and the like are evaluated, systematic deviation which is difficult to predict exists between a simulation result and measured data. This bias results in difficulty in accurately quantifying the attenuation margin, sensitivity threshold and radiation efficiency boundary of the radio frequency link at the early stage of design, forcing engineers to rely on repeated trial and error for design verification, significantly prolonging the development period and increasing the hardware iteration cost. Based on the background, the technical problem to be solved by the invention is how to establish a radio frequency link evaluation model capable of dynamically coupling chip reference design data and physical hardware actual parameters, and to quantify the composite influence of device type selection, circuit layout and environmental variables on radio frequency performance with high precision, thereby realizing the prediction and optimization of link performance in the early stage of design. Disclosure of Invention The disclosure provides a 2.4G band radio frequency link estimation method for a wireless access point, which aims to overcome at least one defect existing in the prior art. In order to achieve the above purpose, the technical scheme disclosed by the invention is as follows: According to one aspect of the present disclosure, a method for estimating a 2.4G band radio frequency link of a wireless access point is provided, which is applied to wireless access point hardware using a high-pass MIAMI series Wi-Fi7 chip, and the steps of the estimation method include: decomposing the radio frequency link into functional units, wherein the functional units comprise a public radio frequency matching module, a filter module, a radio frequency front-end module and an antenna module; collecting quantization parameter indexes according to the functional units, wherein the quantization parameters comprise link attenuation values and temperature characteristic indexes; Inputting the collected quantitative parameter indexes into a preset radio frequency link estimation table for comparison analysis, and generating a performance difference report; and identifying design defects and directionally optimizing radio frequency device model selection or circuit board layout based on the performance difference report. Furthermore, the common radio frequency matching module comprises an impedance matching element and transmission line loss parameters, the filter module comprises a receiving end second-order filter insertion loss index, the radio frequency front-end module comprises a radio frequency front-end chip gain and linearity index, and the antenna module comprises antenna efficiency and radiation characteristic parameters. Still further, the quantization parameter indicators include an attenuation value for each transmit link, an attenuation value for each receive link, a multi-link operational isolation budget, a high temperature environmental performance degradation value, and a mass production consistency deviation value. Still further, the radio frequency link estimation table includes: a reference parameter column for storing a high-pass reference design standard value; proposal parameter columns, storing actual measurement values of a scheme to be evaluated; a total radiated power budget field including a transmit power value in a particular wireless mode; an omni-directional sensitivity budget field including a receive sensitivity value in a particular wireless mode. Still further, the total radiated power budget field contains a dual-stream transmit power value in an enhanced high throughput 20MHz bandwidth 0-order modulation coding scheme mode, and the omni-directional sensitivity budge