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FBMC symbol modulation and demodulation method and device

A technique of modulation method and demodulation method, which is applied in the field of FBMC symbol modulation, demodulation method and device, and can solve problems such as reducing the complexity of FBMC symbol modulation and demodulation

Active Publication Date: 2017-06-20
SPREADTRUM COMM (SHANGHAI) CO LTD
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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

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  • FBMC symbol modulation and demodulation method and device
  • FBMC symbol modulation and demodulation method and device
  • FBMC symbol modulation and demodulation method and device

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Embodiment Construction

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

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Abstract

The invention provides an FBMC (Filtered Bank Multi-Carrier) symbol modulation and demodulation method and device. The modulation method includes executing carrier mapping; performing inverse Fourier transform on a combined frequency domain sequence so as to obtain a time domain sequence of FBMC symbols subjected to modulation, executing at least one operation among the below during the carrier mapping executing process so as to enable the time sequence of a Q-channel FBMC symbol in the time domain sequences of the FBMC symbols to offset odd number times of a half of the total carrier number of the symbol sequences than the time domain sequence of an I-channel FBMC symbol in the time domain sequences of the FBMC symbols subjected to modulation: multiplying even number symbol sequences and odd number symbol sequences among the I-channel FBMC symbol sequences respectively by a preset first linear phase and a preset second linear phase, and multiplying even number symbol sequences and odd number symbol sequences among the Q-channel FBMC symbol sequences respectively by a preset third linear phase and a preset fourth linear phase. By adopting the above scheme, FBMC symbol modulation and demodulation complexity is reduced.

Description

technical field [0001] The present invention relates to the communication field, in particular to a modulation and demodulation method and device for FBMC symbols. Background technique [0002] Filtered Bank Multi-Carrier (FBMC) is a subcarrier-based spectrum shaping scheme, which is a non-orthogonal multi-carrier waveform. A filter bank is obtained by a prototype filter and its frequency shift, so as to realize Parallel multicarrier transmission. Combined with FBMC offset modulation, its I / Q independence can be used to expand the transmission rate, so that the spectral efficiency exceeds Orthogonal Frequency Division Multiplexing (OFDM) under the same conditions. [0003] At present, the multi-carrier symbol sequence modulation is realized by combining FBMC with the multi-frequency interleaving (Staggered Multi-Tone, SMT) technology obtained by offset modulation. The main process is as follows: firstly, 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 Applications(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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