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Downlink transmitter of LTE base station system and data processing method thereof

A base station system and data processing technology, applied in transmission systems, multi-frequency code systems, digital transmission systems, etc., can solve the problem of high data flow, and achieve the effect of reducing transmission cost, data transmission flow, and data bit width.

Inactive Publication Date: 2013-12-04
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of this, the main purpose of the present invention is to provide a downlink transmitter of an LTE base station system and a data processing method thereof, so as to solve the problem that the data flow of the LTE distributed base station system Ir downlink transmission is too high

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  • Downlink transmitter of LTE base station system and data processing method thereof
  • Downlink transmitter of LTE base station system and data processing method thereof
  • Downlink transmitter of LTE base station system and data processing method thereof

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Embodiment 1

[0043] In this embodiment, the bandwidth of the LTE base station system is 20MHz, the number of subcarriers is 1200, and the interval between subcarriers is 15KHz.

[0044] The structure of the downlink transmitter of the LTE base station system in this embodiment is as follows: figure 2 As shown, the BBU and the RRU are included, and the BBU and the RRU are connected through the Ir interface. Wherein, one transmitter may include at least one BBU and at least one RRU, and one BBU may be connected to at least one RRU, that is, one BBU may be connected to one or more RRUs.

[0045] Specifically, such as image 3 As shown, the BBU in the downlink transmitter in this embodiment may include a bit-level processing module and a modulation module, and the RRU may include a layer mapping / precoding module, a serial-to-parallel conversion module, an IFFT / IDFT module, a parallel-to-serial conversion module, and a CP adding module, numerical intermediate frequency module, DAC module and...

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Abstract

The invention discloses a downlink transmitter of a long term evolution (LTE) base station system. The downlink transmitter comprises a base band unit (BBU) and a remote radio unit (RRU), wherein the BBU and the RRU are connected by an Ir ( interface between the RRU and the BBU). The BBU is used for carrying out bit-level processing and modulation processing on original data and sending the processed data to the RRU by the Ir; and the RRU including an inverse fast fourier transform (IFFT) / inverse discrete fourier transform (IDFT) module is used for receiving the data sent by the BBU through the Ir, carrying out IFFT or IDFT processing on the data and emitting the data. Correspondingly, the invention also discloses a data processing method of the downlink transmitter. The sampling rate and the data bit width are reduced. Therefore, the Ir downlink data transmission flow is effectively reduced, the cost of transmission from the BBU to the RRU is lowered, and the optical fiber resources laid at the Ir are saved; and thus an objective of saving of the equipment cost and the maintenance cost is achieved.

Description

technical field [0001] The present invention relates to the next-generation Long Term Evolution (LTE, Long Term Evolution) technology, in particular to a downlink transmitter of an LTE base station system and a data processing method thereof. Background technique [0002] Currently, a distributed base station implemented by using a base band processing unit (BBU, Base Band Unit) and a radio remote unit (RRU, Remote Radio Unit) has been widely used in the LTE system. Among them, the BBU is mainly used to realize baseband processing functions such as encoding / decoding, multiplexing / demultiplexing, modulation / demodulation, spread spectrum / despreading, and communication with high-level systems, and the RRU is mainly used to realize modulation / demultiplexing of the wireless signal front end Demodulation, digital up / down conversion, A / D conversion and other functions. [0003] In the LTE system, Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L1/00H04B1/00H04B1/04
Inventor 廖群任震耿鹏秦洪峰许玲王雯芳李远英
Owner ZTE CORP
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