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Fixing beam shaping device and method applied to CDMA system

A technology of fixed beams and beams, applied in code division multiplexing systems, diversity/multi-antenna systems, multiplexing communications, etc., can solve problems such as increasing system complexity, reduce the amplitude of transmitted signals, and achieve simple implementation , the effect of reducing the realization cost

Inactive Publication Date: 2009-05-13
ZTE CORP
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Problems solved by technology

[0006] In order to solve the above problems, the present invention proposes a fixed beamforming device and its method applied in the CDMA system, so that the signal energy of the sector beam has equal or approximately equal characteristics at each antenna element end, and without significant Satisfy the upgrade needs from non-smart antennas to smart antennas under the condition of increasing system complexity

Method used

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  • Fixing beam shaping device and method applied to CDMA system
  • Fixing beam shaping device and method applied to CDMA system
  • Fixing beam shaping device and method applied to CDMA system

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Embodiment Construction

[0047] The invention uses the same antenna array to generate a cluster of fixed narrow beams and a sector beam, and applies it to a CDMA mobile communication system. In order to achieve the above purpose, the system of the first embodiment of the present invention mainly includes an antenna array, a fixed narrow beamforming network (Butler array) and a phase adjustment device. The fixed narrow beamforming network (Butler array) and the phase adjustment device together form a sector beam and a fixed narrow beamforming device.

[0048] According to the method provided by the present invention, a fixed narrow beam forming network (Butler array) and an antenna array are firstly used to realize a cluster of fixed narrow beams. Beamforming needs to adjust the weighting coefficient of the signal and perform shifting and equal processing. The processing can be performed at the baseband or at the radio frequency end. This article mainly discusses beamforming at the radio frequency end....

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Abstract

One fixed narrow beam and one sector beam are generated by an antenna array. Multiple fixed narrow beams are realized by shaping technique of simulating fixed beams and using shaping network (Butler array) of fixed narrow beams. A sector beam covering whole sector is formed through controlling initial phase of beam at Butler array side by using phasing adjustment device. Signal energy of sector beams at side of each component of antenna array is equal or approximately equal. Thus, amplitude of transmitted signal of each component of antenna array is lowered.

Description

technical field [0001] The present invention relates to a fixed beam forming method and device for an intelligent antenna system, in particular to a method and device for implementing intelligent antenna technology in a Code Division Multiple Access (CDMA) mobile communication system. Background technique [0002] In recent years, the CDMA mobile communication system has been greatly developed and applied. The most typical example is the currently commercially available CDMA2000 mobile communication system. Compared with mobile communication systems of other systems, such as time division multiple access TDMA and frequency division multiple access FDMA systems, CDMA systems have advantages in capacity and service quality, but co-channel interference (CCI) and wireless channel interference between CDMA system users On the other hand, the number of mobile communication users is increasing rapidly, and people's requirements for the quality of mobile calls are also continuously ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/02H04W88/08H01Q25/04H01Q3/40H04B7/06H04B7/08H04W16/28
Inventor 张彭李立林
Owner ZTE CORP
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