Method, base station and wave filter for reducing adjacent channel interference in wireless system
An adjacent frequency interference and wireless system technology, applied in a method, a base station and a filter to reduce adjacent frequency interference in a wireless system, can solve the problem that the interference between adjacent frequencies in a wireless system cannot be reduced, and the difficulty of building a network with a co-site site increases. , co-site construction network cannot be realized, etc., to achieve the effect of reducing bandwidth and reducing interference
Active Publication Date: 2013-01-09
HUAWEI TECH CO LTD
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Problems solved by technology
[0010] The above method of building a network at the same site has the following disadvantages: this method is only applicable to the internal network optimization of the same operator
Moreover, the market strategies and network coverage goals of each network operator may be different, making it more difficult to build a network at a common site
Therefore, the method of building a network at the same site is often impossible to implement in practice, and it cannot reduce the interference between adjacent frequencies of the wireless system.
Method used
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[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.
[0037] Here, also taking the CDMA system as an example, the solution of the embodiment of the present invention for reducing the adjacent frequency interference of the wireless system is described.
[0038] In the standard protocol, the bandwidth of the base station's transmission frequency, the range of each base station's transmission frequency, and the passband frequency f of the shaping filter in the base station are specified. p and the stopband frequency f s , respectively 590KHz and 740KHz. The base station according to the passband frequency f p and the stopband frequency f s , to obtain the filter coefficients, the shaping filter in the base station performs calculations according to the filter coefficients and the service data to be se...
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The embodiment of the invention discloses a method for reducing the adjacent frequency interference of the wireless system, and the method comprises the following steps: A. inputting the modulated business signal into the molding wave filter, and obtaining the business data with reduced adjacent frequency interference when the molding wave filter executes wave filtering treatment according to thestored wave filter coefficient and business signal with reduced adjacent frequency interference; B. converting the business data with reduced adjacent frequency interference to the analog signal, andtransmitting the middle frequency point to the wireless receiving terminal when the middle frequency point of the analog signal is converted to the middle frequency point with the transmitting frequency band prescribed by the base station on the base band. The embodiment of the invention also discloses a base station for reducing the adjacent frequency interference of the wireless system and a wave filter for reducing the adjacent frequency interference of the wireless system. The technical scheme of the invention reduces the interference between the adjacent frequencies and facilitates the normal operation of the wireless receiving terminal in the covering area of the adjacent frequency domain.
Description
technical field [0001] The invention relates to wireless communication technology, in particular to a method for reducing adjacent frequency interference in a wireless system, a base station and a filter. Background technique [0002] In a wireless communication system, there is an interference problem between adjacent frequencies. Here, the adjacent frequency interference is described by taking the CDMA protocol as an example. [0003] In the CDMA protocol, the transceiver frequency range of base stations in each frequency band and the bandwidth of each CDMA carrier are stipulated. The base station outputs the data signal with the bandwidth specified in the protocol to the wireless receiving terminal after filtering by the forming filter. Here, the wireless receiving terminal is used as a mobile phone for illustration. [0004] In actual engineering, the shaping filter of the base station cannot meet the ideal requirements, and the signal power is completely limited withi...
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IPC IPC(8): H04W16/18H04W88/08H04B1/48H04B1/707
Inventor 戚浩峰鲁迎春付卫香姜瑛黄跃洪黄建中
Owner HUAWEI TECH CO LTD