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Method and system for processing multi-antenna signal

A multi-antenna and signal technology, applied in the communication field, can solve the problems of high cost, high BBU cost, short transmission distance, etc., and achieve the effect of reducing cost, facilitating capacity expansion and flexible networking, and improving capacity expansion capability.

Active Publication Date: 2009-01-21
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

However, the cost of the BBU is relatively high, which brings pressure to the expansion work
[0005] It can be seen that the existing technology supports more signal volumes by superimposing analog signals to achieve coverage without blind spots. This method has the problems of short transmission distance and large interference by noise signals
Or, the existing technology supports more antennas by adding BBUs to achieve coverage without blind spots, which makes the cost of network construction and maintenance higher

Method used

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  • Method and system for processing multi-antenna signal

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Embodiment Construction

[0060] The embodiment of the present invention enables the BBU in the distributed base station system to support more antennas by combining multiple digital signals.

[0061] The basic technical solution of this embodiment is: in the uplink (UL), the multi-channel digital signals with the same subcarrier are vector superimposed according to the same time position, so as to be combined into one digital signal; and in the downlink (DL) In the process, one digital signal is copied into multiple digital signals, which are respectively mapped to each port for transmission. Wherein, the number of multiple digital signals to be copied depends on the number of corresponding ports.

[0062] see figure 1 In this embodiment, the flow of the method for the RRU to combine multiple digital signals is as follows:

[0063] Step 101: Convert multiple analog signals received from multiple antennas into corresponding digital signals, and obtain the corresponding relationship between multiple a...

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Abstract

The present invention discloses a method of processing multi-antenna signals. When the method is used, a single baseband unit BBU in the distributed base station system can support a plurality of antennas which surpass the self designed capacity of the base station system, so as to satisfy the needs of development of communication. Moreover, the network building costs are reduced. In the method, a radio frequency remote unit RRU can respectively transform the multi-channel analog signals received by a plurality of antennas into the corresponding digital signals; the RRU complete the vector superposition of the multi-channel digital signals which are acquired from the multi-channel analog signals of the same subcarrier, according to the same time position; then the multi-channel digital signals are combined to form the digital signals of one path. The present invention also discloses a BBU, a base-band interface unit, a RRU and a system.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for processing multi-antenna signals. Background technique [0002] With the rapid development of communication users and communication services, the number of existing antennas can no longer meet the demand. In order to expand the communication system, one way is to increase the number of antennas, and the other way is to combine multiple signals into one signal . [0003] In traditional base station systems, analog signals are transmitted between the baseband and transceivers. The analog signal can be superimposed directly through the transmission line and sent to the baseband side for processing. However, during the transmission of the analog signal, the analog signal will continue to attenuate as the transmission distance increases. In the process of long-distance transmission of analog signals, relay equipment (such as dry amplifier stations) is usually used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/26
CPCH04B7/0613
Inventor 邹素玲李军王洪波范炬
Owner DATANG MOBILE COMM EQUIP CO LTD
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