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Flow sorting method and system for MIMO signals

A sorting method and signal technology, applied in the field of flow sorting, can solve problems such as analysis failure and not necessarily applicable, and achieve the effects of reducing test complexity, testing flexibility, and improving test flexibility

Active Publication Date: 2021-03-30
深圳市极致汇仪科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the flow sorting method using the cyclic shift feature to obtain the frame header position difference feature may not be applicable in a multipath channel environment
In addition, when the DUT performs beamforming transmission, the same data stream may be transmitted on multiple antenna ports. When the tester analyzes it, if the correct stream number is not identified, the analysis will fail.

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  • Flow sorting method and system for MIMO signals
  • Flow sorting method and system for MIMO signals
  • Flow sorting method and system for MIMO signals

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Embodiment Construction

[0048] The preferred embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0049] When the DUT performs MIMO testing, the tester needs to collect each data stream of the DUT at the same time. Because the MIMO connection may be disordered, or the DUT will send out two identical data streams after beamforming, or to test the performance of the cross-connection, this The scene where the sequence of streams is disordered requires the tester to be able to correctly distinguish and analyze. The present invention provides a method and system for sorting MIMO signal streams, regardless of whether the sequence of streams transmitted by the DUT to the tester is disordered or the same stream is transmitted multiple times. , the tester can select the necessary data streams and complete the sorting according to the stream number, and then successfully analyze the indicators of the MIMO signal transmitted by the DUT. ...

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Abstract

The invention provides a flow sorting method and system for MIMO signals. The flow sorting method comprises the following steps of: S1, achieving frame synchronization for MIMO signal sliding correlation based on a long training sequence LTF; S2, performing flow sorting based on the frame synchronization result obtained in the step S1; S3, calculating the carrier frequency offset of each data stream, and performing carrier frequency offset compensation on the whole stream signal; S4, realizing initial channel estimation based on a long training sequence LTF; S5, analyzing the frame system message based on the initial channel estimation; and S6, performing flow sorting based on the data training sequence. According to the invention, the problem of analysis failure of the tester caused by wrong connection between the DUT and the tester and signal space-time flow disorder when the DUT sends the beamforming signal can be effectively solved, the MIMO test complexity of the DUT is reduced, and the test flexibility of the tester is improved.

Description

technical field [0001] The invention relates to a stream sorting method, in particular to a stream sorting method for analyzing MIMO signals under the 802.11n / ac / ax standard with a tester, and to a stream sorting system using the stream sorting method. Background technique [0002] In modern wireless communication systems, the combination of OFDM technology and MIMO technology greatly improves the system capacity. The 802.11n, 802.11ac, and 802.11ax standards promoted by the Wi-Fi Alliance all use these two technologies. [0003] For a DUT (device under test) that supports MIMO, each data stream carries different information. During R&D testing or production testing, multiple data streams of the DUT are sent out using different RF antenna ports, and the tester needs to use RF (radio frequency) The units collect the signals of the data stream separately, and each antenna port needs to correspond to a set of RF units of the tester. This test method of one-to-one correspondenc...

Claims

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Application Information

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IPC IPC(8): H04B7/0413H04J3/06H04L7/04H04L25/02
CPCH04B7/0413H04L25/0228H04L25/0242H04J3/0608H04L7/042
Inventor 蒋芜吴建兵
Owner 深圳市极致汇仪科技有限公司