Optical fiber time delay compensation method and device suitable for long term evolution (LTE) system

Abstract

The invention provides an optical fiber time delay compensation method suitable for a long term evolution (LTE) system. The optical fiber time delay compensation method suitable for the LTE system comprises the following steps: step A, conducting bit field processing to lower level sending signals; step B, conducting caching to the lower level sending signals in bit field; step C, conducting resource mapping to the cached lower level sending signals of the bit field, and transferring the lower level sending signals after resource mapping into frequency division multiplexing (OFDM) signs; step E, conducting middle radio frequency processing to the OFDM signs. The invention further provides an optical fiber time delay compensation device suitable for the LTE system.

Description

technical field [0001] The invention relates to mobile communication and optical fiber communication technologies, in particular to an optical fiber time delay compensation method and device suitable for LTE systems. Background technique [0002] Remote radio technology has been widely used in current communication systems, where radio frequency units and antenna units are arranged in places where communication signal coverage is required, and baseband processing units can be managed centrally, which not only solves the problem of location selection of base stations and radio frequency pull The problem of feeder loss between the remote unit and the antenna, and the centralized management of the baseband processing unit can bring a series of benefits such as cost control and resource sharing. [0003] The baseband processing unit and the radio remote unit are connected by optical fiber. Due to factors such as the density of the station layout and location selection, the remot...

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Problems solved by technology

[0008] It can be seen from Table 1 that the number of storage units at the downlink sending end is proportional to the distance and the number of antennas. When 8 antennas are transmitted and the fiber is extended to 40 kilometers, the required buffer space is 192KB. If the buffer space is If implemented in the baseband processing unit, when the baseband processing unit processes multiple cells, the on-chip buffer space will become a bottleneck and it is difficult to meet the demand

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