A system and method for receiving multiple inbound signals of the same user machine in diversity

A diversity reception and user machine technology, applied in the field of satellite navigation, can solve problems such as the inability to use the diversity reception method and the large time delay difference of inbound signals

Active Publication Date: 2018-11-02
湖南中电星河电子有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for satellite mobile communication systems, the time delay difference between inbound signals forwarded by different satellites is large, and multiple identical inbound signals do not arrive at the antenna receiving link at the same time, so the traditional diversity reception method cannot be used

Method used

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  • A system and method for receiving multiple inbound signals of the same user machine in diversity
  • A system and method for receiving multiple inbound signals of the same user machine in diversity
  • A system and method for receiving multiple inbound signals of the same user machine in diversity

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing, the present invention will be further described:

[0032] refer to figure 2 and Figure 4 The present invention provides a system for diversity reception of multiple inbound signals of the same user machine, including a signal processing unit, a gigabit switch and a service processing server, and the signal processing unit implements despreading, decoding, After the CRC check and packet are sent to the data preprocessing unit of the business processing server through the gigabit switch; the gigabit switch is used to send the inbound data packet processed by the signal processing unit to the data preprocessing of the business processing server unit; the business processing server includes a data preprocessing unit, a data storage unit, a CRC checking unit, a time judging unit and a diversity processing unit, and the data preprocessing unit is used to receive the inbound data packet sent by the signal processing unit throu...

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Abstract

The invention discloses a system and method for diversity reception of multiple identical user receiver inbound signals. The system comprises a signal processing unit, a gigabit switch and a service processing server. The signal processing unit receives user receiver inbound digital signals and conducts de-spreading, decoding, CRC checking and packaging on the user receiver inbound digital signals and then sends the user receiver inbound digital signals to the service processing server. The service processing server judges CRC identification bits of received user receiver inbound data packets within the receiving time threshold, and if the CRC identification bits of one or more of the multiple identical user receiver inbound signals are indicated to be correct, diversity reception does not need to be performed; if the CRC identification bits of all the multiple identical user receiver inbound signals are indicated to be wrong, the method for diversity reception is adopted. According to the system and method, branch mistakes appearing in signal transmission are corrected through redundant signals, and the purposes that the receiving signal level is increased and the diversity gain is obtained and received are achieved.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a method and a system for receiving and processing inbound signals by a ground center station in a satellite mobile communication system. Background technique [0002] The Beidou satellite short message communication system shares 5 Beidou GEO (Geostationary Earth Orbit, geostationary earth orbit) satellites. Generally, the inbound beams will cover multiple times, such as figure 1 As shown, the inbound signals sent by the user machine in the overlapping area will enter the ground center station through different beams, so the ground center station will receive multiple copies of the same user machine inbound signal. [0003] The receiving process of the user machine inbound signal is as follows: figure 2 shown. Due to the limited power of the satellite's transmitted signal, the signal transmission loss is relatively large, so a large antenna is used for reception ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08H04B1/16
CPCH04B1/16H04B7/0817
Inventor 雍玲朱祥维李井源龚航李峥嵘刘瀛翔伍微周蓉徐博
Owner 湖南中电星河电子有限公司
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