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Signal emission method and corresponding receiving terminal beam forming method

A signal transmission and signal technology, applied in the field of signal processing, can solve the problem that the hybrid carrier system cannot be applied, and achieve the effect of suppressing and improving transmission performance.

Inactive Publication Date: 2017-09-15
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Claims
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Problems solved by technology

However, current technology research on beamforming technology mainly focuses on traditional single-carrier systems and Orthogonal Frequency Division Multiplexing (OFDM) systems, which cannot be applied to mixed-carrier systems.

Method used

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  • Signal emission method and corresponding receiving terminal beam forming method
  • Signal emission method and corresponding receiving terminal beam forming method
  • Signal emission method and corresponding receiving terminal beam forming method

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Embodiment Construction

[0026] In order to make it easier for those skilled in the art to understand the technical solution of this patent, and at the same time, in order to make the technical purpose, technical solution and beneficial effect of this patent clearer, and to fully support the protection scope of the claims, the following is a specific case in the form of this patent. The technical solution of the patent makes further and more detailed descriptions.

[0027] A signal transmission method based on fractional Fourier transform modulation, which is applied to a signal transmission end, comprising the following steps:

[0028] (1) Through a suitable mapping method, such as a quadrature phase shift keying (Quadrature Phase Shift Keyin, QPSK) method, the original signal is mapped to a digital signal form S' that is convenient for signal processing;

[0029] (2) insert comb-shaped pilots at equal intervals in the mapped digital signal to obtain the signal S after the inserted pilots; the comb-s...

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Abstract

The invention discloses a signal emission method and a corresponding receiving terminal beam forming method, and belongs to the technical field of signal processing. The emission method comprises the steps of mapping original signals into a digital signal form, inserting a comb type pilot frequency, converting signals into time-domain digital signals, performing serial and parallel conversion on the time-domain digital signals in sequence, adding a cyclic prefix, performing serial and parallel conversion and digital / analogue conversion to form analogue signals, transmitting the analogue signals through a doubly selective channel,and the like. The method applies a wave forming technology based onthe minimum mean square error to a mixed carrier system, not only realizes the natural advantage of doubly selective channel resistance of the mixed carrier system based on fractional Fourier transform, but also realizes the inhibitory effect on intersymbol interference of a wave forming algorithm, thereby greatly enhancing the transmission performance of a communication system and realizing a significant improvementonthe prior art.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a signal transmitting method and a corresponding receiving end beamforming method. Background technique [0002] With the rapid development of modern communication technology, the requirements for the reliability of information transmission in the field of communication are constantly increasing. However, due to the complexity of the communication environment, signal transmission is inevitably subject to interference from dual channel selection in the time domain and frequency domain, which seriously affects the communication quality. [0003] For example, during the transmission process, the signal will be affected by the Doppler effect caused by relative movement, and also be affected by the multipath effect caused by multipath transmission. In actual scenarios, the above two forms of channel fading often exist at the same time, so this situation is also call...

Claims

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Application Information

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IPC IPC(8): H04B7/08H04L27/26
CPCH04B7/086H04B7/0854H04L27/2628H04L27/265
Inventor 李勇杨博宋志群刘丽哲孙腾
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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