Antenna switching receiving system and wireless communicator equipped with the system
An antenna switching and receiving system technology, applied in diversity/multi-antenna systems, error prevention/detection through diversity reception, space transmit diversity, etc., can solve the problem of unclear switching destination antenna reception level, increase in the number of retransmissions, discomfort, etc.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Publication Date
- 2015-12-16
- Estimated Expiration
- Not applicable · inactive patent
Smart Images
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Abstract
Description
technical field
[0001] The present invention relates to an antenna switching receiving system for switching antennas to perform reception in a wireless communication system. Background technique
[0002] In a wireless communication system, level degradation due to multipath fading (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 the level degradation caused by the multipath fading, there is a multi-carrie...
Examples
no. 1 approach
[0115] An antenna switching reception system according to a first embodiment of the present invention will be described with reference to the drawings. The antenna switching reception system is built in, for example, a switchboard having a wireless communication function or the like. Such a switchboard receives a command wirelessly transmitted from a monitoring device operated by a manager, and wirelessly transmits information such as power consumption. The monitoring device that has received information on power consumption and the like transmitted from the switchboard displays current or cumulative power consumption and the like in areas where power is distributed by the switchboard. The switchboard and the monitoring device are provided with a wireless communication function so that the monitoring device can be appropriately installed and moved according to the environment and the like.
[0116] In the present embodiment, one antenna is provided in the monitoring device, a...
no. 2 approach
[0227] An antenna switching reception system according to a second embodiment of the present invention will be described with reference to the drawings. Figure 46 Shows the schematic structure of the antenna switching receiving system. The antenna switching receiving system 110 is composed of an antenna unit 111 having two antennas, an antenna switching unit 112 , an antenna switching timing detection unit 113 , an antenna switching determination unit 114 , and the like. The antenna switching unit 112 switches to any one of the two antennas. The antenna switching timing detection unit 113 detects the timing at which the antenna switching unit 112 switches the antenna by detecting, for example, a signal of a predetermined level or higher. The antenna switching determination unit 114 selects an antenna for receiving a payload signal based on the RSSI (received signal strength) of a signal received by a certain antenna via the antenna switching unit 112, and outputs a control s...