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Double sideband modulation system and its signal receiving end, frequency domain equalization device and method

A technology of modulation system and frequency domain equalization, which is applied in baseband system components, shaping network in transmitter/receiver, etc., can solve the problem of not being able to maximize frequency diversity collection, and achieve maximum frequency diversity gain and performance Improvement, performance-enhancing effect

Active Publication Date: 2018-03-02
曹明伟
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AI Technical Summary

Problems solved by technology

[0009] In the SC-FDE system, each modulation symbol transmitted occupies the entire bandwidth, so for frequency selective channels, if figure 1 The shown frequency domain equalization can collect a certain frequency diversity, but it cannot maximize the collection of frequency diversity

Method used

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  • Double sideband modulation system and its signal receiving end, frequency domain equalization device and method
  • Double sideband modulation system and its signal receiving end, frequency domain equalization device and method
  • Double sideband modulation system and its signal receiving end, frequency domain equalization device and method

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Embodiment Construction

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0044] Considering a broadband wired communication, optical communication or wireless communication system, in order to combat multipath fading, adopt SC-FDE technology (such as point-to-point communication system), or adopt SC-FDMA technology (such as multipoint-to-point communication system). Since the essence of the SC-FDMA technology is exactly the same as that of the SC-FDE technology, except that the multiple access function is added, the present invention only uses the SC-FDE technology as an example for illustration. Firs...

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Abstract

The invention discloses a frequency domain equalization device for collecting maximum frequency diversity gain in a double sideband modulation system. The device includes a Fourier transform module, a combining module, an equalization module and an inverse Fourier transform module. The Fourier transform module is used for Transform the received signal after removing the cyclic prefix to the frequency domain to generate a frequency domain signal; the combination module is used to perform maximum ratio combination on the frequency domain signal to collect frequency diversity gain and output the combined signal; the equalization module is used to perform equalization calculation on the combined signal ; The inverse Fourier transform module is used to transform the output signal of the equalization module back to the time domain to obtain an estimated value of the received signal corresponding to the sent signal. The frequency domain equalization device of the present invention can maximize the frequency diversity gain in the collection system. The invention also discloses a signal receiving end with the frequency domain equalization device, a double sideband modulation system with the signal receiving end, and a frequency domain equalization method for collecting maximum frequency diversity gain in the double sideband modulation system.

Description

technical field [0001] The invention belongs to the technical field of broadband digital communication, and in particular relates to a frequency domain equalization device and a frequency domain equalization method for collecting the maximum frequency diversity gain in a double sideband modulation system, and a signal receiving end of a double sideband modulation system with the frequency domain equalization device and a double sideband modulation system with the signal receiving end. Background technique [0002] In a communication system, different systems use specific allocated frequency resources, so it is necessary to perform spectrum shifting on modulated signals, that is, carrier modulation technology. After carrier modulation, the baseband signal is moved to the carrier, and the frequency band is symmetrically distributed on both sides of the center frequency. Such a signal is called a double-sideband modulated signal. [0003] Currently, there are mainly two carrie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03
Inventor 曹明伟
Owner 曹明伟
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