Radio communication device and method of controlling antenna

A wireless communication device and antenna technology, applied in antennas, independent non-interactive antenna combinations, multiplex communication, etc., can solve problems such as inability to obtain diversity effects

Inactive Publication Date: 2001-11-07
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional base station apparatus, when the number of antennas of the mobile station at the receiving end is one, there is a problem that the diversity effect cannot be obtained.
That is, if the number of antennas of the mobile station at the receiving end is multiple, the diversity effect can be obtained through space diversity, but usually the number of antennas of the mobile station is one, so the diversity effect cannot be obtained in this case
Especially when the fading speed is slow, the period in which the reception level drops lasts for a long time, so the diversity effect cannot be obtained

Method used

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  • Radio communication device and method of controlling antenna
  • Radio communication device and method of controlling antenna
  • Radio communication device and method of controlling antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The wireless communication device and the antenna control method of this embodiment respectively use a specific carrier frequency to convert multiple types of transmission data, and switch between multiple antennas included in the wireless communication device sequentially over time to transmit the transmission data.

[0027] Hereinafter, the wireless communication device and antenna control method according to Embodiment 1 of the present invention will be described with reference to FIGS. 2 to 4 . Fig. 2 is a block diagram showing a main part of the schematic configuration of the wireless communication apparatus according to Embodiment 1 of the present invention.

[0028] In the wireless communication device shown in FIG. 2 , encoding unit 101 encodes four types of transmission data A to D. The modulation unit 102 performs predetermined modulation processing on the coded transmission data A to D. The radio unit 103 multiplies and converts the modulated transmission da...

Embodiment 2

[0040] The difference between the wireless communication device and the antenna control method of the present embodiment and the first embodiment is that the repetition period of the switching pattern is consistent with the time interleaving length of FEC (Forward Error Correction, Forward Error Correction).

[0041] Hereinafter, a wireless communication device and an antenna control method according to Embodiment 2 of the present invention will be described with reference to FIG. 5 . FIG. 5 is a schematic diagram showing a situation in which data is transmitted from each antenna of the wireless communication device according to Embodiment 2 of the present invention.

[0042] Here, the "time interleaving length of FEC" refers to the division period when convolutionally encoded data is divided and transmitted.

[0043] In the switching pattern storage unit 108, switching patterns are set such that the number of divisions of convolutionally encoded data matches the number of swi...

Embodiment 3

[0048] The radio communication device and antenna control method of the present embodiment differ from the first embodiment in that a switching pattern is set so that transmission data is switched between antennas with low inter-antenna correlation.

[0049] Hereinafter, a wireless communication device and an antenna control method according to Embodiment 3 of the present invention will be described with reference to FIG. 6 and FIG. 7 . FIG. 6 is a diagram showing an example of switching patterns preset in the switching pattern storage unit of the wireless communication device according to Embodiment 3 of the present invention. Fig. 7 is a schematic diagram showing the state of transmitting data from each antenna of the wireless communication device according to Embodiment 3 of the present invention.

[0050] Here, "correlation between antennas" refers to mutual correlation between antennas. In the first embodiment described above, switching is performed regardless of the deg...

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Abstract

Radio section 103 multiplies modulated transmission signals A to D respectively by a carrier with a frequency of fA, fB, fC or fD, thereby performs the frequency conversion, and outputs the resultant signals to switch 104 . Switch 104 switches between frequency conversion sections fA to fD and between antennas A to D to connect, and timing control section 105 outputs a timing control signal to switching control section 107 at time intervals for which timer 106 is preset. Switching control section 107 controls the switching of switch 104 according to switching patterns which are preset in switching pattern storage section 108 and which are each indicative of a connection relationship between antennas A to D and frequency conversion sections fA to fD.

Description

technical field [0001] The present invention relates to a wireless communication device and an antenna control method, in particular to a wireless communication device including multiple antennas and a control method for multiple antennas. Background technique [0002] In a 1-to-N communication system in which one base station transmits different information to multiple (N) mobile stations, such as a commercial wireless communication system, the base station includes multiple antennas, and simultaneously transmits different information to multiple mobile stations from each antenna . [0003] In this case, conventional base station apparatuses transmit only one type of information from one antenna. FIG. 1 is a schematic diagram of a situation in which data is transmitted from a plurality of antennas included in a conventional base station apparatus. [0004] As shown in FIG. 1, the base station apparatus includes a plurality of antennas (here, the number of antennas is set ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01Q3/24H01Q21/28H04B1/04H04B7/06H04B7/12H04J3/00
CPCH04B7/0604H04B7/12H04B7/155
Inventor相泽纯一加藤修上杉充秋山健
OwnerPANASONIC CORP