Downlink transmitter of long term evolution (LTE) base station system and data processing method of downlink transmitter

A base station system and data processing technology, applied in multi-frequency code systems and other directions, can solve the problem of high data traffic, reduce transmission costs, reduce data bit width, and save fiber resources.

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

AI Technical Summary

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 traffic transmitted on the downlink Ir of the LTE distributed base station system is too high

Method used

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  • Downlink transmitter of long term evolution (LTE) base station system and data processing method of downlink transmitter
  • Downlink transmitter of long term evolution (LTE) base station system and data processing method of downlink transmitter
  • Downlink transmitter of long term evolution (LTE) base station system and data processing method of downlink transmitter

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Embodiment 1

[0037] 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.

[0038] 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.

[0039] Specifically, such as image 3 As shown, the BBU in the downlink transmitter in this embodiment may include a MAC module, and the RRU may include a bit-level processing module, a modulation module, a layer mapping / precoding module, a serial-to-parallel conversion module, an IFFT module, a parallel-to-serial conversion module, and a CP Add module, numerical IF module, DAC module and radio frequency ...

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Abstract

The invention discloses a downlink transmitter of a long term evolution (LTE) base station system. The downlink transmitter includes a base band unit (BBU) and a remote radio unit (RRU), wherein the base band unit (BBU) is connected with the remote radio unit (RRU) through an interface Ir between the remote radio unit (RRU) and the base band unit (BBU), the base band unit (BBU) is used for transmitting original data to the remote radio unit (RRU) through the interface Ir, and the remote radio unit (RRU) comprises an inverse fast Fourier transform (IFFT)/inverse discrete Fourier transform (IDFT) module and is used for receiving the original data transmitted by the base band unit (BBU), and performs inverse fast Fourier transform (IFFT) or inverse discrete Fourier transform (IDFT) on the original data, and thereafter transmits the processed original data. Correspondingly, the invention also discloses a data processing method of the downlink transmitter; and the data processing method of the downlink transmitter can assist in decreasing sampling rate and reducing data bit width, and therefore, data transmission traffic on the Ir can be effectively decreased, and the cost of the transmission from the base band unit (BBU) to the remote radio unit (RRU) can be decreased, and optical fiber resources arranged on the Ir can be decreased, and equipment cost and maintenance cost can be saved.

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): H04L27/26
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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