Antenna switching receiving system and its corresponding transmitting system
A receiving system and antenna switching technology, which is applied in the field of antenna switching receiving systems, can solve the problems of unclear switching destination antenna receiving level, increased retransmission times, low receiving level, etc., achieves a simple and cheap structure, and reduces level fluctuations , The effect of reducing the processing load
Active Publication Date: 2017-04-12
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0043] An antenna switching reception system according to one embodiment of the present invention will be described with reference to the drawings. figure 1 An 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 generator 103 , a fuel cell 104 , a storage battery 105 , an electric vehicle 106 , an information processing terminal 107 , and a switchboard 108 . 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 each user's home b...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More 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 in a first set time (T1). 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 in second set time (T2). 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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0404H04B7/08H04B17/00
Inventor 茂住严笠井秀树
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD