Channel correcting method of multichannel TD-RRU

Abstract

The invention provides a channel correcting method of multichannel TD-RRU, which comprises the following steps: a pseudo-noise (PN) sequence is constructed in a baseband signal as a reference sequence; after the conversion of the baseband signal and an intermediate frequency / radio frequency signal of the reference sequence at a TD-RRU sending end, the reference sequence is sent into a radio frequency channel; after the conversion of the radio frequency / intermediate frequency signal of a corresponding received signal at a TD-RUU receiving end, a processed received sequence and the reference sequence are processed by chip time delay operation to obtain the chip time delay of the radio frequency channel; the radio frequency channel is processed by time delay correction of a chip grade according to the chip time delay so as to finish chip synchronization; the received sequence and the reference sequence are processed by weight value correction operation to work out an inconsistent coefficient of amplitude / phase in the channel within a chip period so as to obtain a corrected weight value; and the channel is processed by amplitude / phase compensation according to the corrected weight value so as to eliminate the inconsistency of the channel and realize the correction of the channel. The method can reduce errors of the channel and meet the requirement on precision of a system.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a channel correction method of a multi-channel TD-RRU. Background technique [0002] As we all know, TD-SCDMA optical fiber remote technology has been widely used. It is a third-generation mobile communication technology, and this technology has attracted great attention from the international community. [0003] Remote technology generally includes three technologies: remote radio, remote intermediate frequency, and remote baseband. TD-SCDMA fiber remote technology is mainly used in radio remote and baseband remote. The remote radio frequency is to transmit the radio frequency signal with the optical fiber for long-distance transmission through the photoelectric coupling component. The remote part includes the photoelectric coupling component, the power amplifier device, and the smart antenna; the remote baseband is divided into the baseband part BBU and the The RRU of the ...

AI Technical Summary

Problems solved by technology

In a multi-channel TD-RRU, the frequency response inconsistency caused by a series of device phase and gain differences, aging, amplitude / phase characteristic distortion, filter delay, etc. will cause time-varying errors in the TD-RRU channel

In this way, there will be a large difference between the real channel and the ideal channel, which will affect the overall performance of the system

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