Wireless receiving device and method for reducing received noise by utilizing diversity antenna

A technology of wireless receiving device and diversity antenna, applied in diversity/multi-antenna system, space transmit diversity, polarization/direction diversity and other directions, can solve the problem of not reducing the internal and surrounding radiation noise of the terminal, and not improving the C/N, High cost and other problems, to achieve the effect of improving receiving sensitivity, reducing radiation noise, and reducing costs

Inactive Publication Date: 2011-08-10
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the antenna selection method is only to find the signal with the best C/N received by the diversity antenna, and the C/N of the signal cannot be further improved on this basis.
In addition, MRC technology requires at least two demodula

Method used

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  • Wireless receiving device and method for reducing received noise by utilizing diversity antenna
  • Wireless receiving device and method for reducing received noise by utilizing diversity antenna
  • Wireless receiving device and method for reducing received noise by utilizing diversity antenna

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Embodiment 1

[0023] figure 2 It is a block diagram of a wireless receiving apparatus that uses a diversity antenna to reduce reception noise according to the first embodiment of the present invention. Reference below figure 2 The configuration and operation of a wireless receiving device that uses a diversity antenna to reduce reception noise according to the first embodiment of the present invention will be described.

[0024] Such as figure 2 As shown, the wireless receiving device using a diversity antenna to reduce reception noise according to the first embodiment of the present invention includes a diversity antenna 200, a switch unit 203, a through circuit 205, an amplitude and phase adjustment circuit 206, a signal synthesis unit 207, and a C / N calculation Unit 209 and control unit 210. The control unit 210 is connected to the switch unit 203 and the amplitude and phase adjustment circuit 206 through a line 204 for controlling the switch unit 203 and the amplitu...

Example Embodiment

[0037] Embodiment 2

[0038] The above embodiment 1 described the first embodiment of the wireless receiving device using the diversity antenna to reduce reception noise of the present invention by taking the diversity antenna including two antenna units as an example.

[0039] As the size and thickness of mobile terminals become smaller and thinner, there is no space for two antenna units in many mobile terminals. Embodiment 2, that is, the second embodiment, describes a wireless receiving device that uses only one antenna unit and implements diversity reception through phase processing.

[0040] Figure 5 An embodiment in which one antenna unit is used to implement a diversity antenna receiving device is shown. Such as Figure 5 As shown, the antenna unit 501 is composed of an antenna element 502 and an antenna element 503. Each branch of the two antenna elements is connected to a phase shifter. The phase shifters in the two branches of the antenna element 502 are +90 degree phas...

Example Embodiment

[0045] Embodiment 3

[0046] In the first embodiment described above, it is necessary to first evaluate the C / N of the signals received by the antenna unit 201 and the antenna unit 202 through the switching of the switch unit 203. If the switching speed is too slow, in order to prevent the switching of the switch from causing the received signal to be intermittent, once the C / N relatively good signal and the relatively poor signal are determined, until the C / N cannot reach the threshold, this premise is assumed. But for the bad signal receiving environment, such as the place where the multipath interference is large and the signal is weak, if the receiving state such as the orientation of the mobile terminal is frequently changed, it needs to be executed multiple times. image 3 The process shown has an impact on the reception effect. To solve this problem, Figure 7 The diversity antenna wireless receiving device according to the third embodiment of the present invention is sho...

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PUM

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Abstract

The invention discloses a wireless receiving device for reducing received noise by utilizing a diversity antenna. The wireless receiving device comprises a diversity antenna, a switching unit, a through circuit, an amplitude and phase adjustment circuit, a signal synthesis unit, a C/N (Carrier-to-Noise Ratio) calculation unit and a control unit, wherein the diversity antenna is used for receiving wireless signals; the switching unit is used for respectively providing two paths of wireless signals received by the diversity antenna for the through circuit and the amplitude and phase adjustment circuit under the control of a control unit; one path of wireless signal received by the diversity antenna originally passes through the through circuit; the amplitude and phase adjustment circuit adjusts the amplitude and/or the phase of the other path of wireless signal received by the diversity antenna; the signal synthesis unit is used for synthesizing the wireless signal output by the through circuit and the wireless signal output by the amplitude and phase adjustment circuit; the C/N calculation unit calculates the C/N values of the wireless signals synthesized by the synthesis unit; and the control unit controls operation executed by the switching unit and the amplitude and phase adjustment circuit.

Description

technical field [0001] The invention relates to a wireless receiving device and method for reducing receiving noise by using diversity antennas. In particular, it relates to differences in the carrier-to-noise ratio (carrier-to-noise ratio: C / N) of signals received by diversity antennas. By making the noise cancel each other out, the useful signal power is not reduced while canceling out the noise part, and the signal is improved. Carrier-to-noise ratio, thereby improving the effect of receiving sensitivity. Background technique [0002] In order to improve the transmission efficiency of television broadcasting, the transmitting antenna of general television broadcasting uses either vertical polarization or horizontal polarization. For plain areas with few occluders, in order to increase the coverage area of ​​TV broadcasting, the transmitting antenna of general TV broadcasting mostly adopts the horizontal polarization mode. However, for mountainous areas and cities with m...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04B7/10H04B1/16H04B1/10H04B7/08
Inventor 李楠
Owner PANASONIC CORP
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