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Signal processing for digital network analyzer

An analyzer and signal technology, applied in the direction of data exchange network, digital transmission system, instrument, etc., can solve the problem of IF signal data acquisition time reduction and other issues

Active Publication Date: 2015-06-24
KEYSIGHT TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As expected, the time used for IF signal data acquisition decreases as the desired frequency resolution decreases

Method used

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  • Signal processing for digital network analyzer
  • Signal processing for digital network analyzer
  • Signal processing for digital network analyzer

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Embodiment Construction

[0026] In the following detailed description, for purposes of explanation and not limitation, illustrative examples disclosing specific details are set forth in order to provide a thorough understanding of embodiments in accordance with the present teachings. However, it will be apparent to one having the benefit of this disclosure that other embodiments of the present teachings departing from the specific details disclosed herein are still within the scope of the appended claims. Moreover, descriptions of well-known devices and methods may be omitted so as not to obscure the description of the example embodiments. Such methods and devices are within the scope of the present teachings.

[0027] Generally, it should be understood that, as used in the specification and appended claims, the terms "a", "an" and "the" include both singular and plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a device" includes a device and a pluralit...

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Abstract

A method is provided for processing a radio frequency (RF) signal output by a device under test (DUT), the RF signal having first comb lines in a predetermined first order. The method includes mixing and filtering the RF signal with a multi-tone local oscillator (LO) signal to provide an intermediate frequency (IF) signal having second comb lines corresponding to the first comb lines, where the mixing operation scrambles in frequency the first comb lines of the RF signal such that the second comb lines of the IF signal are in a second order different from the predetermined first order; digitizing the IF signal at a predetermined sampling rate; and descrambling the digitized IF signal with time domain signal processing such that the second comb lines of the digitized IF signal are arranged in the predetermined first order.

Description

Background technique [0001] A digital network analyzer (DNA) generally describes a network analyzer architecture that generates digital stimulus patterns for system identification and a corresponding receiver architecture that recovers system responses. The DNA architecture also mixes the response in a digital mixing mode chosen such that the mixing product of interest lies within a narrow intermediate frequency (IF). This enables, for example, receiver architectures to use commercial analog-to-digital converters (ADCs) to measure broadband energy (derived from broadband excitation) without sweeping the local oscillator (LO). DNA can be orders of magnitude faster than traditional (swept LO) network analyzers because the broadband excitation is acquired simultaneously rather than sequentially with the swept LO. Furthermore, DNA can largely trade signal-to-noise ratio (SNR) for measurement time and avoid LO settling time, band crossing, etc. [0002] The DNA receiver architect...

Claims

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Application Information

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IPC IPC(8): H04L12/26
CPCG01R31/3167G01R27/28H03D7/1466H04B1/00
Inventor A·D·费尔南德斯
Owner KEYSIGHT TECH
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