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Sensitivity test method and device

A test method and sensitivity technology, applied in the field of communication, can solve problems such as the inability to balance test accuracy and efficiency, and achieve the effect of improving test efficiency and precision

Active Publication Date: 2016-03-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a sensitivity test scheme to solve the problem that the accuracy and efficiency of the test cannot be taken into account when testing the sensitivity of the device under test in the related art

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Experimental program
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Embodiment 1

[0022] The embodiment of the present invention provides a method for testing the sensitivity of a device to be tested, and the method can be used for automatic measurement of wireless products. figure 1 It is a flow chart of the testing method for the sensitivity of the device under test according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0023] Step S102, input the first signal to the device under test, and test to obtain the carrier-to-noise ratio of the device under test in response to the first signal; wherein, the device under test includes but not limited to wireless devices;

[0024] Step S104, acquiring a demodulation threshold for modulation and decoding of the first signal;

[0025] Step S106, determining the sensitivity of the device under test according to the signal strength, carrier-to-noise ratio and demodulation threshold of the first signal.

[0026] In general, sensitivity means that the...

Embodiment 2

[0035] The purpose of this embodiment is to provide a method for quickly and accurately measuring sensitivity, the principle of which will be described in detail below.

[0036] When testing the sensitivity, first input a strong signal arbitrarily, and then measure the packet error rate (PacketErrorRate, referred to as PER) of the product. Usually, the PER at this time is 0. Therefore, it is difficult to determine the signal strength in the next step based on this value. How much to adjust to get close to the sensitivity. However, if the carrier-to-noise ratio of the signal to be demodulated is counted at this time, the sensitivity of the product can be calculated according to the demodulation threshold of the signal (for a certain modulation and coding method, this is a predictable constant). The principle is as follows:

[0037] Let the stronger signal strength of any input be S i1 (dBm), the thermal noise energy at the input port is N i (dBm), then the signal-to-noise ra...

Embodiment 3

[0049] This embodiment is a further optimization of Embodiment 1, and the implementation process of this embodiment will be described in detail below.

[0050] figure 2 It is a flow chart of the test method for the sensitivity of the device under test according to Embodiment 3 of the present invention, such as figure 2 As shown, the method includes the following steps:

[0051] Step S201, input a strong signal of arbitrary strength (for example, a signal 10-30dB higher than the estimated sensitivity), set the strength of the signal as S i1 (dBm).

[0052] In step S202, the carrier-to-noise ratio when measuring the signal strength is set as CINR (dB).

[0053] Step S203, query the theoretical demodulation threshold SNR of the signal according to the modulation and coding method of the input signal 0 .

[0054] Step S204, according to S i0 = S i1 +(SNR 0 -SNR 1 )=S i1 +[SNR 0 -10lg (10 CINR / 10 -1)] Calculate the sensitivity level S i0 .

[0055] Step S205, modify...

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Abstract

The invention discloses a method and device for testing sensitivity. The method comprises the following steps of: inputting a first signal to an apparatus to be tested, testing to obtain a carrier-to-noise ratio of the apparatus to be tested, in response to the first signal; obtaining a demodulation threshold of modulation decoding of the first signal; and determining the sensitivity of the apparatus to be tested according to the signal intensity of the first signal, the carrier-to-noise ratio and the demodulation threshold. By using the method and the device, the problem that the testing veracity and the testing efficiency cannot be synchronously considered when the sensitivity of the apparatus to be tested is tested in the prior art is solved, and therefore, the effects of increasing the testing efficiency and improving the testing precision are achieved.

Description

technical field [0001] The invention relates to the field of communication, in particular to a sensitivity testing method and device. Background technique [0002] Sensitivity is an important indicator of wireless products (such as receivers), and its meaning is the minimum input signal strength that does not exceed a certain packet error rate. In general, the sensitivity is tested manually, but this method takes a long test period and is not efficient. Generally, automatic testing can only test whether the sensitivity of the product can meet the standard, rather than finding the real sensitivity point of the product, because it is very difficult to implement: first, the starting point of the test is difficult to grasp, because it is not known at the beginning. Whether it is good or bad, the margin needs to be set. If the margin is set large, the search time will be very long; and if the margin is set small, some samples may not be able to find the sensitivity point. Secon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/29H04B17/318H04B17/345
Inventor 陈侃浩
Owner ZTE CORP
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