Symbol processing method and device

Abstract

The invention provides a symbol processing method and device. The symbol processing method comprises the following steps of: acquiring a first set corresponding to a first transmitting symbol and a second set corresponding to a second transmitting symbol according to a plurality of complex symbols; copying the first set and the second set to enable the first set and the second set to have first complex symbols, wherein an initial position of a first subset formed by the first complex symbols in the first set is the same as an initial position of a second subset formed by the first complex symbols in the second set; and performing signal processing including cyclic shift or frequency domain weighting on the first set and the second set, so that the initial position and an end position of the first subset respectively correspond to positions in front of and behind a first reference point of a first transmitting symbol, and the initial position and the end position of the second subset respectively correspond to positions in front of and behind the second reference point of a second transmitting symbol. According to the symbol processing method and the device, the guard interval between symbols can be flexibly configured.

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). ...

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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

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