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A modulation and demodulation method and device for fbmc symbols

A modulation method and a demodulation method technology are applied in the demodulation method and device, the modulation field of FBMC symbols, and can solve the problems of reducing the complexity of FBMC symbol modulation and demodulation, etc.

Active Publication Date: 2019-08-16
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The problem solved by the present invention is how to reduce the complexity of FBMC symbol modulation and demodulation

Method used

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  • A modulation and demodulation method and device for fbmc symbols
  • A modulation and demodulation method and device for fbmc symbols
  • A modulation and demodulation method and device for fbmc symbols

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Embodiment Construction

[0196] At present, the modulation of multi-carrier FBMC symbol sequence is realized by multi-frequency interleaving (Staggered Multi-Tone, SMT) technology obtained by combining FBMC with offset modulation. The main process can be referred to figure 1 : First, divide the symbol sequence of each path into real part and imaginary part, such as S I (0) and js Q (0) are the real and imaginary parts of the first FBMC symbol sequence in the FBMC symbol sequence, S I (1) and js Q (1) are the real and imaginary parts of the second FBMC signal in the FBMC symbol sequence, and so on, S I (N-1) and jJs Q (N-1) are the real part and imaginary part of the Nth FBMC signal in the FBMC symbol sequence; then the real part of the FBMC symbol sequence is passed through the first prototype filter, that is, through the operation with h(t) , The imaginary part passes through the second prototype filter, that is, through the operation with h(tT / 2), the imaginary part is offset by T / 2 relative to the rea...

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Abstract

A kind of modulation, demodulation method and device of FBMC symbol, described modulation method comprises: Carrier mapping is carried out; The frequency domain sequence after merging is done inverse Fourier transform, obtains the time domain sequence of the FBMC symbol after modulation, in execution In the carrier mapping process, at least one of the following operations is performed, so that the time domain sequence of the Q-way FBMC symbol in the time-domain sequence of the modulated FBMC symbol is more than the I-way in the time-domain sequence of the modulated FBMC symbol The time-domain sequence offset of the FBMC symbol is an odd multiple of half of the total carrier number of the symbol sequence: the even and odd symbol sequences in the I-way FBMC symbol sequence are multiplied by the preset first and second linear phases respectively; The even-numbered and odd-numbered symbol sequences in the Q-way FBMC symbol sequence are respectively multiplied by the preset third and fourth linear phases. The complexity of modulation and demodulation of FBMC symbols can be reduced by adopting the above solution.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a method and device for modulating and demodulating FBMC symbols. Background technique [0002] Filtered Bank Multi-Carrier (FBMC) is a spectrum shaping scheme based on sub-carriers. It is a non-orthogonal multi-carrier waveform. The filter bank is obtained through a prototype filter and its frequency shift to achieve Parallel multi-carrier transmission. Combined with FBMC offset modulation, it can use its I / Q independence to expand the transmission rate, so that the spectrum efficiency exceeds Orthogonal Frequency Division Multiplexing (OFDM) under the same circumstances. [0003] At present, multi-frequency interleaving (Staggered Multi-Tone, SMT) technology obtained by combining FBMC with offset modulation is used to achieve multi-carrier symbol sequence modulation. The main process is as follows: First, the modulated FBMC symbol sequence is divided into real part and The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L27/22H04L27/20
CPCH04L27/2014H04L27/22H04L27/2628H04L27/264H04L27/265
Inventor 黄甦潘振岗师延山
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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