Signal processing system of air fleet link communication/measurement comprehensive channel system
A signal processing and channel technology, applied in the field of radio navigation and aviation data link, can solve the problems of spread spectrum gain loss and so on
Inactive Publication Date: 2013-04-24
NAT SPACE SCI CENT CAS
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This means that using a shorter spreading code can obtain a higher information transmission rate without sacrificing measurement performance, but the spreading gain is lost, which must be compensated by other methods, such as: increasing antenna gain and increasing transmit power ,and many more
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[0091] The present invention is a signal processing system of a cluster link communication / measurement integrated channel system. Aiming at the autonomous characteristics of the cluster formation task, a cluster link based on the spread spectrum measurement / non-spread spectrum data transmission isochronous multiplexing physical channel is constructed. Communication and measurement integrated channel system and its realization method. The signal processing system of the present invention specifically includes a signal generation module and a signal tracking module; the specific technical scheme is as follows:
[0092] (1) Signal generation module of cluster link communication / measurement integrated channel system
[0093] The invention absorbs the idea of intermittent burst spread spectrum communication, and constructs a comprehensive channel system that solves the problem of realizing spread spectrum ranging and high-speed communication data transmission in a unified channel...
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The invention relates to a signal processing system of an air fleet link communication / measurement comprehensive channel system. By the invention, a system framework of a non-spread spectrum transmission digital transmission / spread spectrum distance measurement system can be realized on a DSP (Digital Signal Processor) of a circuit board and an FPGA (Field Programmable Gate Array). The signal processing system retains the advantage of high information transmission rate of a non-spread spectrum system, takes the advantages of convenient distance measurement and antiinterference of a spread spectrum system and comprehensively realizes a non-spread spectrum transmission digital transmission / spread spectrum distance measurement comprehensive system in a single channel through a time division multiplex channel mode. And meanwhile, the invention also provides a signal tracking method of the communication / measurement comprehensive channel system based on a realtime prediction algorithm of carrier wave Doppler shift and solves the signal tracking difficulty of the communication / measurement comprehensive channel system under the high dynamic condition. The method can be widely applied to satellite navigation receivers, distance measurement systems and communication / measurement function comprehensive systems based on a suppressed carrier modulation direct sequence spread spectrum system.
Description
technical field [0001] The invention relates to a signal processing system of a group link communication / measurement integrated channel system, belonging to the technical fields of aviation data link and radio navigation. Background technique [0002] Traditionally, data transmission and baseline measurement between aircraft are physically separated, and the devices are independent of each other. In the future collaborative mission of the fleet network, the formation member aircraft are largely UAVs or even micro UAVs with relatively single function, simple and compact structure, light weight and small volume, and tight energy supply. Therefore, we have to start to consider integrating tasks such as communication data transmission and baseline measurement, cluster link-related parameter measurement, and time synchronization into one terminal. It is best to achieve unified function integration through algorithms on a single hardware platform. The main way to implement the id...
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IPC IPC(8): H04B1/707H04B17/00H04L25/02H04L27/18H04B17/309H04B17/391
Inventor 杨宜康陈晓敏安军社
Owner NAT SPACE SCI CENT CAS