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Method and device for changing phase jump of phase shift keying (PSK)

A digital phase modulation and phase hopping technology, which is applied in phase modulation carrier systems, transmission monitoring, electrical components, etc., can solve problems affecting test and measurement results, interference, etc., achieve low cost, improve phase hopping, and suppress harmonics The effect of weight

Active Publication Date: 2014-06-18
RIGOL
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Problems solved by technology

[0011] The embodiment of the present invention aims to solve a method and device for improving the phase hopping of digital phase modulation in the prior art, and to solve the problem that the harmonic components generated by the phase hopping in the prior art interfere with adjacent frequency channels, and further Issues Affecting Test Measurements

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  • Method and device for changing phase jump of phase shift keying (PSK)
  • Method and device for changing phase jump of phase shift keying (PSK)

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Embodiment Construction

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0055] like image 3 It is a flowchart of a phase hopping method for improving digital phase modulation provided by an embodiment of the present invention.

[0056] Step 301 is included, modulating the binary sequence baseband symbols to be modulated to generate modulation symbols.

[0057] As an embodiment, the binary sequence baseband symbols can be modulated into parallel data with a width of 2 bits, and the parallel data is the modulation symbols.

[0058] Step 302, sending out a phase jump signal when the modulation symbol changes.

[0059]...

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Abstract

The invention relates to the technical field of test and measurement, especially to a method and device for changing the phase jump of PSK. The device comprises a serial-to-parallel converter, a starting unit, a PSK word generation unit and a signal generator, wherein the serial-to-parallel converter is used for modulating a to-be-modulated baseband code element in a binary sequence and generating a modulation code element; the starting unit emits a phase jump signal when the modulation code element changes; the PSK word generation unit is used for generating PSK words in a transitional area within a period tau via a continuous function according to the phase jump signal; and the signal generator is used for generating a carrier wave whose phase continuously changes according to the PSK words. According to the method and device, the required phase shift is modulated, the transitional area ensures that the phase shift is continuous and smooth, thus, phase jump in the prior art is changed, and harmonic-wave components generated by phase jump is greatly inhibited.

Description

technical field [0001] The invention relates to the technical field of test and measurement, in particular to a method and device for improving phase jump of digital phase modulation. Background technique [0002] The function signal generator can not only generate standard function waveforms, but also generate modulation signals of various modulation types, including analog modulation signals and digital modulation signals, where digital modulation is divided into phase shift keying (also known as digital phase modulation), frequency modulation Shift keying, amplitude keying. In digital phase modulation, quadrature phase shift keying (Quadrature Phase Shift Keying, QPSK) is widely used in the test and measurement of communication systems because of its high spectrum efficiency and strong anti-interference. In the QPSK modulation scheme, baseband symbols are modulated using a phase shift (or phase jump) between four phases separated by 90°. [0003] Existing technologies s...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04L27/20
Inventor 丁新宇王悦王铁军李维森
Owner RIGOL
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