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Interleaving method in orthogonal frequency division multiplexing system and device thereof

An orthogonal frequency division and symbol interleaving technology, applied in the field of digital information transmission, can solve the problems of low implementation complexity and high data throughput rate, and achieve the effect of low implementation complexity and high throughput rate

Active Publication Date: 2014-06-18
TSINGHUA UNIV +1
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to design an interleaving method and device in an OFDM system, so that the system can obtain higher time, frequency, and signal space diversity gains, while maintaining higher data throughput and lower implementation complexity. Spend

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  • Interleaving method in orthogonal frequency division multiplexing system and device thereof
  • Interleaving method in orthogonal frequency division multiplexing system and device thereof
  • Interleaving method in orthogonal frequency division multiplexing system and device thereof

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Embodiment Construction

[0039] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0040]figure 1 It is a flowchart of the method of the present invention, and the present invention provides a method for interleaving in an OFDM system, the steps of which are as follows:

[0041] S1. Divide the complex symbol sequence to be transmitted into a real part and an imaginary part, that is, in-phase and quadrature two-way symbol sequences;

[0042] S2. Keeping the symbol sequence of the in-phase or quadrature path unchanged, divide the symbol sequence of the other path into multiple groups in turn, and perform intra-group interleaving in each group;

[0043] S3. Recombining the uninterleaved in-phase or orthogonal symbol sequence in step S2 and another symbol s...

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Abstract

The invention discloses an interleaving method in an orthogonal frequency division multiplexing system and a device thereof. The method comprises that: S1. plural symbol sequences to be transmitted are divided into a real part and an imaginary part, i.e. two paths of same-phase and orthogonal symbol sequences; S2. the same-phase or the orthogonal paths of symbol sequences are maintained to be unchanged, another path of symbol sequences are divided into multiple groups in turn, and intra-group interleaving is performed in each group; S3. the same-phase or the orthogonal paths of symbol sequences which are not interleaved in the step S2 are recombined with the another path of symbols after interleaving so that new plural symbol sequences are formed and are called first plural symbol sequences; S4. symbol interleaving is performed on the first plural symbol sequences so that second plural symbol sequences are obtained; S5. and orthogonal frequency division multiplexing modulation is performed on the second plural symbol sequences. Time, frequency and signal space diversity gain of the orthogonal frequency division multiplexing system are enhanced. Meanwhile, higher throughput and lower realization complexity are maintained.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to an interleaving method and device capable of improving time, frequency, and signal space diversity gains in an Orthogonal Frequency Division Multiplexing (OFDM) system. Background technique [0002] In communication and broadcasting systems, actual channels usually have certain correlations in the time and frequency domains. From the time domain, the channel time domain impulse response (CIR) in adjacent time periods does not change much; from the frequency domain, the channel frequency domain impulse response (CFR) in adjacent frequencies is also almost the same; that is, the channel has memory characteristics . The memorization of channel response in the time / frequency domain can easily lead to burst errors, and the possibility that adjacent data in the instant / frequency domain are in deep fading at the same time is extremely high, especially for terre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L27/26
Inventor 潘长勇谢求亮杨昉彭克武杨知行
Owner TSINGHUA UNIV
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