GSM-R base station with high interference signal restraining capability

A GSM-R and interference signal technology, applied in the field of GSM-R base stations, can solve the problems of receiver amplifier saturation and inability to receive signals normally, achieve the goal of compressing the receiving bandwidth, reducing transceiver interference, and lowering the floor noise level Effect

Active Publication Date: 2014-08-27
NANJING TICOM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3) Blocking interference: receiving a strong signal at the out-of-band ed

Method used

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  • GSM-R base station with high interference signal restraining capability
  • GSM-R base station with high interference signal restraining capability
  • GSM-R base station with high interference signal restraining capability

Examples

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Example Embodiment

[0025] The present invention will be further described below in conjunction with the drawings.

[0026] The structure of the dual bandpass filter is as image 3 As shown, it includes a high-frequency signal insertion port RFin and a radio frequency signal port RFout. When the base station is connected to a dual bandpass filter, the structure is as follows figure 1 Shown. The high frequency signal insertion port RFin is an N-K radio frequency head, which is connected to 1 / 2 feeder, and is connected to a GSM-R base station. The radio frequency signal port RFout is an L29(7 / 8)-K radio frequency head, which is connected to a 7 / 8 feeder and connected to an antenna.

[0027] The structure of dual bandpass GSM-R coupler is as Figure 4 As shown, it includes a high-frequency signal insertion port RFin, a radio frequency signal port RFout, and a coupling port Couple. When the base station is connected to a dual bandpass GSM-R coupler, the structure is as follows figure 2 Shown. . The h...

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Abstract

The invention provides a GSM-R base station with high interference signal restraining capability. The GSM-R base station comprises a BTS and an antenna, and a pair of dual-bandpass filters or a pair of dual-bandpass GSM-R couplers is arranged between the BTS and the antenna. Each dual-bandpass filter or each dual-bandpass GSM-R coupler comprises a high-frequency signal insertion port RFin and a radio frequency signal port RFout, wherein the high-frequency signal insertion port RFin is an N-K radio frequency head which is connected with a 1/2 feeder and connected with the GSM-R base station, and the radio frequency signal port RFout is an L29 (7/8)-K radio frequency head which is connected with a 7/8 feeder and connected with the antenna. According to the GSM-R base station with the high interference signal restraining capability, due to the dual-bandpass filters or the dual-bandpass GSM-R couplers, the reception bandwidth of the GSM-R base station is compressed, the bottom noise level is lowered, out of band large signal interference is restrained, blocking of GSM-R BTS is prevented, and the interference on the GSM-R BTS caused by intermodulation is effectively reduced.

Description

technical field [0001] The invention relates to the field of communication systems, in particular to a GSM-R base station with high suppression of interference signals. Background technique [0002] With the continuous increase of communication requirements, wireless communication networks are almost everywhere, and frequency resources are becoming increasingly tight, and the resulting mutual interference between wireless systems is inevitable. The working frequency band of GSM-R is uplink 885-889MHz; downlink 930-934MHz; adjacent to China Telecom, China Mobile and China Unicom, see the following table for details: [0003] [0004] GSM-R base station radio frequency interference mainly includes the following types: [0005] 1) Uplink interference: According to Table 1, the uplink frequency band of the GSM-R base station is susceptible to the downlink interference of China Telecom's CDMA800 and the second harmonic interference of China Unicom's DCS1800, resulting in a de...

Claims

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Application Information

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IPC IPC(8): H04B1/10H04W88/08
Inventor 倪小龙吉荣新
Owner NANJING TICOM TECH
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