Wideband digital frequency-selecting wireless repeater system and wideband signal digital frequency-selecting method thereof

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 station, in particular to a broadband digital frequency selective wireless repeater system and a broadband signal digital frequency selective method. Background technique [0002] With the popularization of mobile communication networks such as GSM, CDMA, and TD-SCDMA, the number of mobile communication users has increased sharply, and the traffic in the mobile network is also increasing, causing the communication network to be in a state of overload operation, which is easy to appear It is similar to failure phenomena such as disconnection, crosstalk, poor voice quality, and difficulty in accessing the Internet. In the face of increasing traffic demand, the network needs to be expanded to meet capacity and coverage requirements. The expansion method of using cell splitting has its limitations. As the station distance continues to approach, network interference is also increasing. Therefore, when the station dis...

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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

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