Navigational satellite signal receiver

Abstract

The invention relates to an antenna of a navigational satellite signal receiving machine, which comprises an antenna, a radio frequency front end module and a base band processing module, wherein the antenna is used for receiving one or a plurality of wave beams of navigational satellite signals, the radio frequency front end module is used for converting each wave beam of navigational satellite signals received by the antenna into two paths of middle frequency digital signals: path I and path Q, the base band processing module is used for carrying out base band signal processing on the middle frequency digital signals to obtain original data, the base band processing module concretely comprises a memory and a viterbi decoder, the memory is used for storing each path of middle frequency digital signals, when a path of stored middle frequency digital signals is a complete frame of data, the complete frame of data is sent into the viterbi decoder, and the viterbi decoder is used for decoding the sent data to obtain serial original data. The invention can realize the simultaneous receiving of a plurality of wave beams of signals, and in addition, the cost can not be greatly increased.

Description

technical field [0001] The invention relates to the field of navigation, in particular to a navigation satellite signal receiver. Background technique [0002] The navigation satellite signal receiver is a kind of downlink signal used to receive navigation satellites (such as Beidou No. The output is sent to an external data processing system for decryption processing, and submitted to the equipment used by the user. [0003] Existing receivers generally use medium-scale FPGA chips, which cannot receive multiple beam signals at the same time. For example, Beidou-1 has 3 satellites and a total of 6 beam signals. According to the existing technology, if you want to receive simultaneously, you need to strengthen the baseband Processing power, but if a larger FPGA chip is used, the cost of the receiver will be greatly increased. [0004] In addition, the existing receivers cannot monitor and receive the positioning and communication information of more than 100 subordinate use...

AI Technical Summary

Problems solved by technology

[0003] Existing receivers generally use medium-scale FPGA chips, which cannot receive multiple beam signals at the same time. For example, Beidou-1 has 3 satellites and a total of 6 beam signals. According to the existing technology, if you want to receive simultaneously, you need to strengthen the baseband Processing power, but if a larger FPGA chip is used, it will greatly increase the cost of the receiver

[0004] In addition, the existing receivers cannot monitor and receive the positioning and communication information of more than 100 subordinate users

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