Base band digital signal encoding modulation integrated system

A baseband digital signal, coding and modulation technology, applied in the field of space communication, can solve the problems of modulated signal spectrum expansion, sideband uplift, etc., achieve high integration and flexibility, overcome single function, and meet the effect of functional application requirements
CN103166743AInactive Publication Date: 2013-06-19NAT SPACE SCI CENT CAS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NAT SPACE SCI CENT CAS
Publication Date
2013-06-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a base band digital signal encoding modulation integrated system comprising a cascade encoding module, a PCM / PSK / PM modulation module and a BPSK / NRZ modulation module. The system is characterized by further comprising a control subsystem used for controlling encoding modulation modes of the cascade encoding module, the PCM / PSK / PM modulation module and the BPSK / NRZ modulation module, wherein the subsystem further comprises an interface module, a first multiplexer, an SRRC-OQPSK modulation module, a data distributor, a multiplexer and a control logic module. The first multiplexer is used for selecting data in one path from two path data output from the interface module and outputting the data to a post-stage circuit which is the cascade coding module. The system is used for completing reed-solomon (RS) coding interface data selection of base band data and coding framing, and can correspondingly select different modulation mode functions according to different transmission code rates including a low transmission code rate, a medium transmission code rate and a high transmission code rate. The system correspondingly selects PCM / PSK / PM.BPSK / NRZ and RC-OQPSK modulation modes according to a downlink low data code rate, a downlink medium data code rate and a downlink high data code rate after achieving base band signal encoding.
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Description

technical field

[0001] The invention belongs to the field of space communication, and relates to a multifunctional integrated control technology for baseband signal encoding and modulation in a satellite-borne digital transmission transmitter, that is, the invention relates to an integrated baseband digital signal encoding and modulation system. Background technique

[0002] The main task of the spaceborne digital transmission transmitter is to encode, modulate and amplify the scientific data and engineering telemetry parameters of payload detection, and then transmit them to the ground receiving station through the antenna. At present, the uplink and downlink data transmission transmitters of some deep space probes mainly use analog low-IF modulation schemes. After the baseband data or telemetry data from the payload is channel coded, it is first modulated on the analog intermediate frequency; after intermediate frequency processing such as intermediate frequency filtering ...

Claims

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