Channel correcting method of multichannel TD-RRU

A channel correction and multi-channel technology, applied in the field of mobile communication, can solve the problems of frequency response TD-RRU channel time-varying error, affecting the overall performance of the system, etc.

Inactive Publication Date: 2009-11-04
COMBA TELECOM SYST CHINA LTD
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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

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  • Channel correcting method of multichannel TD-RRU
  • Channel correcting method of multichannel TD-RRU
  • Channel correcting method of multichannel TD-RRU

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[0070] Hereinafter, the present invention will be further described in detail with reference to the embodiments and the drawings, but the embodiments of the present invention are not limited thereto.

[0071] Such as figure 2 As shown, the channel correction system of this multi-channel TD-RRU includes the baseband processing subsystem at the transmitting end, the intermediate frequency / RF subsystem at the transmitting end, the radio frequency channel, the baseband processing subsystem at the receiving end, and the intermediate frequency / RF subsystem at the receiving end connected in sequence. .

[0072] The transmitting end baseband processing subsystem includes a reference sequence processing module.

[0073] The transmitting end intermediate frequency / radio frequency subsystem includes a digital intermediate frequency processing module, a DA conversion module, a radio frequency amplifying module, and an up-conversion module connected in sequence.

[0074] The radio frequency ch...

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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 ...

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Application Information

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IPC IPC(8): H04B7/216H04B7/04
Inventor 李馨
Owner COMBA TELECOM SYST CHINA LTD
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