Wireless receiving device and method of controlling antenna beam-width and method thtereof, and base station and mobile communication system

Abstract

A radio receiver is provided with a beam-width-variable antenna that receives a radio signal and is capable of changing the beam-width; an interference canceller for removing interference waves from the received radio signal and outputting an interference-wave-removed signal; a measuring device for measuring reception quality of the received signal based on the interference-wave-removed signal; and a beam-width controller for controlling the beam-width of the beam-width-variable antenna based on the reception quality from the measuring device.

Description

technical field [0001] The present invention relates to a wireless receiving device and method, in particular to a wireless receiving device and a wireless receiving device characterized by controlling the beam width (or orientation angle) of a variable beam width antenna according to the reception quality such as the ratio of the received desired wave power to the interference wave power. method. Background technique [0002] In a mobile communication system such as a cellular phone system, a radio entrance network (radio entrance network) connecting base stations must be established. figure 1 Such a wireless communication system is exemplified. [0003] according to figure 1 , each base station 2 forming each service area 1 has an antenna 4 with directivity 3 . The wireless incoming network between the base stations 2 is established through the directional antenna 4 (refer to figure 1 thick arrow). In this wireless inter-station access network, the antenna 4 not only ...

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Problems solved by technology

[0008] Among the existing interference mitigation technologies mentioned above, when using a circular aperture antenna, although it is expected to reduce the interference by increasing the antenna aperture, increasing the beam width will bring about the problem of requiring a larger installation space

Also, when the interference is not serious and you want to spontaneously set up two or more links to multiple base stations, sometimes you want to increase the orientation angle, but you cannot meet this requirement

In addition, if the beam width changes, the antenna itself must be replaced

Another disadvantage is that when adding a new line, not only must a real antenna be installed, but also increase the interference received from the new line, and even the antennas of other lines must be replaced

Although it is also possible to deal with new disturbances, there is a problem that it is difficult to configure a processing system due to the complexity of the control, and the amount of calculation increases.

[0010] Also, after all, there are physical and technical limitations on the narrowness of the beam width of the above-mentioned circular antenna and adaptive array antenna, so the influence of the interference wave coming from the same direction as the expected wave is still strong.

[0011] Let’s look at the situation of the interference canceller again. Although all interference waves can be eliminated theoretically, if the number of interference waves increases, a copy generation circuit is required for each interference wave, so the circuit scale and calculation amount will increase. Exponentially growing, difficult to implement processing systems

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