Wideband digital frequency-selecting wireless repeater system and wideband signal digital frequency-selecting method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A wireless repeater and broadband signal technology, applied in radio relay systems, radio transmission systems, transmission systems, etc., can solve problems such as unfavorable product debugging and mass production, difficulty in adjusting the filtering characteristics of analog filters, and poor flexibility. Achieve the effect of facilitating system debugging and production, good applicability and scalability, and improving consistency
Inactive Publication Date: 2009-09-02
COMBA TELECOM SYST CHINA LTD
View PDF0 Cites 20 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0005] (1) The surface acoustic filter is required for frequency selection filtering processing. Since the surface acoustic filter is an analog device, the consistency of performance is not good, and the debugging is very difficult, which is not conducive to product debugging and mass production; (2) in wireless direct playback In the station system, multiple local oscillator signal reference sources are required. Due to the poor stability of the local oscillator signal generated by the analog device, frequency deviation is prone to occur, which leads to the deviation of the input and output frequency points of the system, and the repeater system is prone to frequency deviation. (3) The linearity of the analog multiplier is not good, the phase after mixing will change, and the difference needs to be compensated by the amplifier, thus introducing more active noise; (4) The analog filter The filtering characteristics are difficult to adjust and not easy to change with the needs of specific applications; (5) the product is large in size and heavy in weight, making it difficult to realize miniaturization and light weight design; (6) the design of analog hardware circuits with single function and poor flexibility The broadband wireless repeater system is difficult to adapt to the needs of today's different communication systems and multi-band wireless communication systems
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0044] like figure 2 As shown, the broadband digital frequency-selective wireless repeater system includes an uplink, a downlink, a repeater power supply subsystem and a repeater monitoring subsystem, and the uplink and downlink include a donor terminal duplexer , a mobile terminal duplexer, a donor antenna, and a retransmission antenna. The downlink also includes a downlink radio frequency receiver subsystem, a downlink broadband signal digital intermediate frequency processing subsystem, and a downlink radio frequency transmitter subsystem. The output end of the donor antenna passes through The duplexer, the downlink radio frequency receiver subsystem, the downlink broadband signal digital intermediate frequency processing subsystem, the downlink radio frequency transmitter subsystem, the donor terminal duplexer, and the mobile terminal duplexer are connected to the input end of the retransmission antenna; the uplink also It includes an uplink radio frequency receiver subsy...
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 invention provides a wideband digital frequency-selecting wireless repeater system and a wideband signal digital frequency-selecting method thereof. The donor antenna output terminal of the systemThe invention provides a wideband digital frequency-selecting wireless repeater system and a wideband signal digital frequency-selecting method thereof. The donor antenna output terminal of the systemis connected with a retransmission antenna input terminal by an donor terminal diplexer, a downlink radio frequency receiver subsystem, a downlink wideband digital intermediate frequency processing s is connected with a retransmission antenna input terminal by an donor terminal diplexer, a downlink radio frequency receiver subsystem, a downlink wideband digital intermediate frequency processing subsystem, a downlink radio frequency transmitter subsystem, and a mobile terminal diplexer in sequence; a retransmission antenna output terminal is connected with a donor antenna input terminal by a mubsystem, a downlink radio frequency transmitter subsystem, and a mobile terminal diplexer in sequence; a retransmission antenna output terminal is connected with a donor antenna input terminal by a mobile terminal diplexer, an uplink radio frequency receiver subsystem, an uplink wideband digital intermediate frequency processing subsystem, an uplink radio frequency transmitter subsystem, and a doobile terminal diplexer, an uplink radio frequency receiver subsystem, an uplink wideband digital intermediate frequency processing subsystem, an uplink radio frequency transmitter subsystem, and a donor terminal diplexer in sequence. The invention can be applied to communication systems such as GSM, CDMA, DCS, JDC, TD-SCDMA, WCDMA, CDMA2000, and the like, thereby forming wideband digital frequencnor terminal diplexer in sequence. The invention can be applied to communication systems such as GSM, CDMA, DCS, JDC, TD-SCDMA, WCDMA, CDMA2000, and the like, thereby forming wideband digital frequency-selecting wireless repeater systems with different communication formats and any signal bandwidth.y-selecting wireless repeater systems with different communication formats and any signal bandwidth.
Description
technical field [0001] The invention relates to a wireless repeater, in particular to a broadband digital frequency selection wireless repeater system and a broadband signal digital frequency selection method. Background technique [0002] With the promotion and popularization of mobile communication networks such as GSM, CDMA, and TD-SCDMA, the number of mobile communication users has increased sharply, and the traffic volume in the mobile network has also continued to increase, causing the communication network to be in an overloaded state, which is prone to It is similar to failure phenomena such as dropped calls, crosstalk, poor voice quality, and difficulty in accessing the Internet. Facing the ever-increasing traffic demand, the network needs to be expanded to meet the capacity and coverage requirements. The expansion method of cell splitting has its limitations. As the distance between stations approaches, the interference of the network is also increasing. Therefore...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.