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Antenna switchover receiving system and transmitting system corresponding to same

A technology of receiving system and antenna switching, applied in diversity/multi-antenna system, transmission system, space transmit diversity and other directions, can solve the problems of low reception level, increased number of retransmissions, unclear antenna reception level of switching destination, etc. To achieve the effect of reducing the processing burden

Active Publication Date: 2014-05-07
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] However, in "switching diversity", the reception level of the antenna of the switching destination is not clear until the antenna is switched
Therefore, there is a disadvantage that if the reception level at the antenna of the switching destination is lower, the signal has to be received under worse conditions
However, the number of retransmissions increases under conditions where the communication environment is poor due to multipath fading, making it unsuitable for devices that need to communicate with multiple devices and successively receive new payload signals

Method used

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  • Antenna switchover receiving system and transmitting system corresponding to same
  • Antenna switchover receiving system and transmitting system corresponding to same
  • Antenna switchover receiving system and transmitting system corresponding to same

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Embodiment Construction

[0037] An antenna switching reception system according to one embodiment of the present invention will be described with reference to the drawings. figure 1An energy management system called HEMS (Home Energy Management System: Home Energy Management System) or the like is shown. HEMS refers to a system that connects home appliances, etc. through a communication network, and controls them together with switchboards, household power generation equipment, etc., and performs information presentation and automatic control for power saving. The HEMS 100 is composed of a HEMS controller 101 , various home appliances 102 , a solar power generator 103 , a fuel cell 104 , a storage battery 105 , an electric vehicle 106 , an information processing terminal 107 , a switchboard 108 , and the like. The switchboard 108 incorporates a power measurement communication device 108a. The switchboard 108 is connected to a smart meter 109 outside the house. The smart meter 109 is provided to eac...

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Abstract

In an antenna switchover receiving system and a transmitting system corresponding to the antenna switchover receiving system, the systems do not process heavy burden processing, and antennas in high signal quality are correctly chosen, and the systems are in simple and low cost structure, so influence of horizontal fluctuation caused by multipath declination is reduced. When a unique word detection portion detects any first unique word (UW1) in a plurality of first unique words (UW1) which are formed by same bit strings, a signal processing portion detects quality of received wireless signals. Then, after an antenna control portion switch over the antennas, the signal processing portion also detects quality of the wireless signals received by switched antenna. An antenna control portion chooses the antenna whose signal quality detected by the signal processing portion is high to receive later effectively load.

Description

technical field [0001] The present invention relates to an antenna switching reception system and the like that perform reception by switching antennas in a wireless communication system. Background technique [0002] In a wireless communication system, level degradation due to multipath fading is cited as one of the issues. The signal received by the receiving antenna is not only a signal directly input from the transmitting antenna to the receiving antenna, but also a signal input via a plurality of different paths. Therefore, signals (multipaths) having different delay times are also input to the receiving antenna, so that the signals overlap each other, cancel each other, etc. at the receiving antenna end to cause the reception level to deteriorate. This is a phenomenon called level degradation caused by multipath fading. [0003] As a typical countermeasure for avoiding the influence of level degradation due to multipath fading, there is a multi-carrier transmission t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08H04B17/00H04B7/06
Inventor 茂住严笠井秀树
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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