Signal sending method and signal sending equipment

A technology of signal transmission and equipment, which is applied in the field of communication, can solve the problems of eliminating interference and the equivalent channel is no longer flat, and achieve the effect of eliminating mutual interference

Active Publication Date: 2014-09-24
HUAWEI TECH CO LTD
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Problems solved by technology

Near the time-frequency boundary of different precoded code blocks, the equivalent channel may no longer be flat, and the interference cannot be eliminated simply by the above-mentioned method of real-virtual separation after equalization

Method used

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  • Signal sending method and signal sending equipment
  • Signal sending method and signal sending equipment
  • Signal sending method and signal sending equipment

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Embodiment Construction

[0060] For multi-user systems, physical resources are usually divided into time-frequency resource blocks with smaller granularity. Different time-frequency resource blocks are allocated to different users according to certain scheduling rules, which means that different precoding matrices will be used on these time-frequency resource blocks allocated to different users. At the same time, in order to achieve a better compromise between complexity and performance, precoding is usually performed according to a certain granularity in the frequency domain, so even in the time-frequency resources of the same user, different precoding matrices may also exist. These resource blocks using different precodings must have critical points of precoding changes in time and frequency. At these critical points, inter-precoding code block interference will occur, which may include the following three possibilities:

[0061] 1. The critical position in the frequency domain will be interfered by...

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Abstract

Provided are a signal sending method and a signal sending device. The signal sending method comprises: eliminating interference on a boundary symbol between at least two precoding code blocks in a multiple-input multiple-output filter bank multi-carrier (MIMO-FBMC) system, wherein the precoding code blocks consist of at least one time-frequency resource element using the same precoding; precoding symbols to be sent in the precoding code blocks so as to obtain precoded symbols; and sending the precoded symbols. The present invention can fully or partially eliminate the mutual interference of precoding code blocks in the time-frequency critical location.

Description

technical field [0001] The present invention relates to communication technology, in particular to a signal sending method and a signal sending device. Background technique [0002] Filter Bank Multi-carrier (hereinafter referred to as: FBMC) is a multi-carrier modulation technology. Compared with Orthogonal Frequency Division Multiplexing (hereinafter referred to as: OFDM), FBMC has a lower bandwidth. External radiation and higher spectral efficiency have good application prospects. A typical implementation solution of FBMC is to use Orthogonal Frequency Division Multiplexing (OFDM) / Offset Quadrature Amplitude Modulation (Offset Quadrature Amplitude Modulation; hereinafter referred to as: OQAM) technology. OFDM / OQAM uses a filter bank to achieve Inter-Symbol Interference (hereinafter referred to as: ISI) transmission without adding a cyclic prefix (Cyclic Prefix; hereinafter referred to as: CP). [0003] An important feature of FBMC is that there will be different degrees...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L25/03
CPCH04L1/06H04B7/0413H04B7/068H04L27/264H04J11/003H04L27/26035H04L5/0026H04B7/0482H04B7/0452
Inventor 陈磊闵雷吴丹
Owner HUAWEI TECH CO LTD
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