Systems and methods for testing sensitivity of wireless communication product in ISM frequency band

A wireless communication and sensitivity technology, applied in transmission systems, transmission monitoring, electrical components, etc., can solve the problems of low sensitivity test accuracy and achieve high accuracy

Inactive Publication Date: 2012-01-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem that the existing ISM frequency band wireless communication product sensitivity test method has low sensitivity test accuracy d

Method used

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  • Systems and methods for testing sensitivity of wireless communication product in ISM frequency band
  • Systems and methods for testing sensitivity of wireless communication product in ISM frequency band
  • Systems and methods for testing sensitivity of wireless communication product in ISM frequency band

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specific Embodiment approach 1

[0029] The specific embodiment one, the system of testing the sensitivity of ISM frequency band wireless communication products, it is the sensitivity system of the receiver under the direct path path test of wired attenuation method, and it comprises adjustable attenuator 2, fixed attenuator 3 and receiver bit error characteristic test equipment 5. The ISM frequency band wireless communication product to be tested includes a transmitter 1 and a receiver 4, the signal transmitting end of the transmitter 1 is connected to the signal receiving end of the adjustable attenuator 2, and the signal output end of the adjustable attenuator 2 Connect with the signal input end of fixed attenuator 3, the signal output end of described fixed attenuator 3 is connected with the signal input end of receiver 4, the test signal output end of described receiver 4 is connected with receiver bit error characteristic test equipment 5 connected to the test signal input terminal.

[0030] Principle: ...

specific Embodiment approach 2

[0034] Specific embodiment two, based on the test method of the system of the test ISM frequency band wireless communication product sensitivity described in specific embodiment one, it is realized by the following steps:

[0035] Step 1, make transmitter 1, receiver 4, receiver bit error characteristic testing equipment 5 be in working condition, adjust the reference attenuation value of adjustable attenuator 2, receiver bit error characteristic testing equipment 5 observes the error of receiver 4 simultaneously code situation, when the bit error rate of the receiver 4 reaches within the preset error range, stop adjusting the reference attenuation value of the adjustable attenuator;

[0036] Step 2, calculate the sensitivity of receiver 4 according to the following formula, described formula is:

[0037]Receiver sensitivity = transmitter output power - adjustable attenuator value - fixed attenuator value - transmission line loss between adjustable attenuator and fixed attenua...

specific Embodiment approach 3

[0041] Specific embodiment three, the system of testing the sensitivity of ISM frequency band wireless communication products, it is the receiver sensitivity system under the wired attenuation method test multipath fading condition, and it comprises No. 1 adjustable attenuator 20, power divider 6, combiner 7. N No. 2 adjustable attenuators 21 and receiver bit error characteristic testing equipment 5. The ISM frequency band wireless communication product to be tested includes a transmitter 1 and a receiver 4. The signal transmitting end of the transmitter 1 can be connected with the No. 1 The signal receiving end of adjustable attenuator 20 is connected, and the signal output end of described No. 1 adjustable attenuator 20 is connected with the signal input end of power divider 6, and a plurality of power signal output ends of described power divider 6 are respectively connected with N The power signal input end of No. two adjustable attenuators 21 is connected with the power si...

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Abstract

The invention discloses method for testing sensitivity of a wireless communication product in an ISM (Industrial, Scientific and Medical) frequency band, relating to methods for testing the sensitivity of the wireless communication products and solving the problem of low accuracy in a sensitivity test because the traditional method cannot simulate an actual condition. In a system I, signals emitted by an emitter are input into a receiver through an adjustable attenuator and a fixed attenuator. In a method I, the error rate from the adjustable attenuator to the receiver is adjusted to determine whether a preset error range is reached, and the sensitivity of the receiver is calculated. In a system II; the signals emitted by the emitter are input into the receiver after being processed by the adjustable attenuator I, a power distributor, a combiner and N adjustable attenuators II. In a method II, the reference attenuation values of the adjustable attenuators are respectively adjusted, the length of a transmission line is adjusted to make the receiver in a critical state, and a power meter is adopted to test the received signal power of the receiver and calculate the sensitivity of the receiver. The systems and methods disclosed by the invention are suitable for testing the sensitivity of the wireless communication products in the ISM frequency band.

Description

technical field [0001] The invention relates to a system and a testing method for testing the sensitivity of wireless communication products. Background technique [0002] The ISM frequency band is mainly used by industry, science, and medical institutions. This frequency band is designated by the Federal Communications Commission of the United States, and it has no restrictions on authorization. There are three ISM frequency bands in the United States, namely 902-928MHz, 2400-2483MHz, and 5725-5850MHz; 2.4GHz is the ISM frequency band shared by all countries. Currently wireless LAN, Bluetooth, ZigBee and other wireless networks can all work in the 2.4GHz frequency band. [0003] Wireless products working in the 2.4GHz ISM frequency band overcome the shackles of cables and have the advantage of flexible use, so they are widely used in modern society. But it also introduces new problems. For example, the wireless channel environment is very complex. The diffraction and scat...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B17/29
Inventor 张文彬葛连正张中兆徐玉滨余君兰魏宏图刘宁庆王孝丛玉萍付晓宁段双滨
Owner HARBIN INST OF TECH
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