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Symbol processing method and device

A symbol processing and symbol technology, applied in the field of communication, can solve the problems such as the inability to flexibly configure the symbol guard interval, different cyclic prefixes, overhead, etc.

Active Publication Date: 2021-01-12
CHENGDU HUAWEI TECH
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  • Claims
  • Application Information

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Problems solved by technology

However, the channel conditions experienced by different users are different, so the requirements for the length of the cyclic prefix may also be different
In order to ensure the performance of all users, the system selects a cyclic prefix whose length is greater than the multipath delay of users with large delay extension. However, for users with small delay extension, an excessively long cyclic prefix will cause unnecessary overhead
[0005] Therefore, the existing technology cannot flexibly configure the guard interval between symbols according to user needs

Method used

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Embodiment Construction

[0064] The technical solution in this application will be described below with reference to the accompanying drawings.

[0065] The technical solution of the embodiment of the present application can be applied to various communication systems, for example, cellular communication systems such as Long Term Evolution (LTE) and its evolution, the future fifth generation (5th Generation, 5G) system or new wireless (New Radio, NR) system, machine-to-machine communication (machine to machine, M2M) system, other communication systems that will evolve in the future, etc.

[0066] Compared with multi-carrier waveforms such as orthogonal frequency division multiplexing (OFDM), discrete fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) ) or single-carrier quadrature amplitude modulation (Single carrier-quadrature amplitude modulation, SC-QAM) and other single-carrier waveforms have lower peak-to-average power ratio (peak to average power ratio, PAPR), so at...

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Abstract

The invention provides a symbol processing method and device, and the method comprises the steps: enabling a plurality of obtained complex symbols to be divided into a plurality of sets, wherein eachset is corresponding to one transmitting symbol, and the sets comprise a first set corresponding to a first transmitting symbol; and mapping the first sequence and the second sequence to a first set,wherein the end position of the first sequence is the position of the intercepted cyclic prefix CP of the first transmission symbol, and the end position of the second sequence is the end position ofthe first transmission symbol. By mapping the sequence to the set, not only can the original cyclic prefix CP be expanded by utilizing the sequence with flexible length, but also flexible guard intervals with different lengths can be configured for each user by adjusting the length of the sequence.

Description

technical field [0001] The present application relates to the communication field, and in particular to a symbol processing method and device. Background technique [0002] In order to resist the multipath effect of the channel, a technique of adding a guard interval between symbols is proposed. First, the guard interval can remove the intersymbol interference (ISI) between adjacent symbols; secondly, after passing through the multipath channel, the guard interval converts the linear convolution of the channel and the transmitted symbol into a cycle of the channel and the transmitted symbol Convolution, which allows the symbol receiving end to use frequency domain equalization methods to eliminate channel multipath effects. [0003] Usually, a cyclic prefix (CP) is used as a guard interval between symbols. A cyclic prefix is ​​a cyclic structure in which a piece of data behind a data symbol (or called the tail) is copied to the front of the symbol (or called the head). ...

Claims

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Application Information

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IPC IPC(8): H04L25/03
CPCH04L25/03006H04L25/03178H04L2025/03764H04L27/2607H04L27/2646
Inventor 刘凤威黄煌
Owner CHENGDU HUAWEI TECH
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