Method for changing emission spectrum shape of transmission system
A technology of transmitting spectrum and transmission system, applied in the field of changing the shape of the transmitting spectrum of the transmission system, can solve the problems of increasing the complexity of the receiving system, sacrificing the system performance, etc., to achieve the effect of good utilization, improve the transmission performance, and avoid interference
Active Publication Date: 2015-10-28
SHANGHAI LINGWO ELECTRONICS TECH
View PDF5 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] The current transmission system processes radio frequency mainly by using different transmission bandwidths and different transmission frequency points. In the case of no continuously usable clean frequency points, the receiving system can only remove part of the external environment through some algorithms. The influence of the environment on the signal, which not only increases the complexity of the receiving system, but also sacrifices part of the system performance
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
[0017] The present invention will be further described below in conjunction with accompanying drawing:
[0018] Such as figure 1 As shown: firstly, the effective carrier position is selected according to the external environment, and the filtering process is performed directly according to the relationship between the effective carrier position and the invalid carrier position, or spectrum shifting and filtering are performed according to the number of invalid spectrum segments in the entire transmission bandwidth, and reverse Spectrum shifting extracts the signal at the invalid spectrum, and then removes the signal at the invalid carrier from the entire signal. The signal after spectrum processing is sent out through back-end processing and digital-to-analog conversion.
[0019] When there is a certain margin in the data rate of the system, according to the interference detected by the in-band signal and the maximum transmission bandwidth of the signal is maintained, the uni...
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
The present invention discloses a method for changing an emission spectrum shape of a transmission system. The method comprises the following steps: before a signal is emitted, the position of an invalid signal is moved to a zero frequency position, and a filter is used for filtering the invalid signal; through spectrum moving, the position of the invalid signal is moved to the previous position, and with processing of multi-path invalid signals, every path of invalid signals is filtered from the integral signal, and based on the above, the filtered invalid signals is cut from the initial signal, namely a useful signal with the invalid signals filtered is obtained; when detected interference exists at two ends of a transmission spectrum, the useful signal is transmitted at an interference-free position, the invalid signals are transmitted at interference positions, and interference signals are directly filtered through spectrum moving. Compared with the prior art, the method better adapts to the surroundings, so that interference is prevented as much as possible by the system in the transmission process, system transmission capability is improved as much as possible, spectrum resources are better utilized, and the method has popularization and application values.
Description
technical field [0001] The invention relates to a communication system transmission technology, in particular to a method for changing the transmission system emission spectrum shape. Background technique [0002] The current transmission system processes radio frequency mainly by using different transmission bandwidths and different transmission frequency points. In the case of no continuously usable clean frequency points, the receiving system can only remove part of the external environment through some algorithms. The impact of the environment on the signal not only increases the complexity of the receiving system, but also sacrifices part of the system performance. Therefore, there is a need for the birth of a new emission spectrum shape method that can generate arbitrary shapes at will. Contents of the invention [0003] The object of the present invention is to provide a method for changing the shape of the transmission spectrum of the transmission system in order ...
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 IPC IPC(8): H04L25/03
Inventor 吴素兰宋伯炜汪园丽汪园香
Owner SHANGHAI LINGWO ELECTRONICS TECH