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W / narrowband signal digital receiver technology

Author: XieZuo
Tutor: LiLiPing
School: University of Electronic Science and Technology
Course: Information and Communication Engineering
Keywords: Channelized receiver technology Channel decision Wide narrowband signal digital receiver technology Cross - channel Channel reconstruction
CLC: TN971.1
Type: Master's thesis
Year: 2010
Downloads: 102
Quote: 0
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Abstract


Digital channelized receiver technology has many advantages in modern electronic warfare: a very wide instantaneous bandwidth with multiple signal processing functions, the total probability of monitoring bandwidth received signal, and other receiver technology complementary. Channelized digital receiver technology research in the past focused on single channel processing, does not take into account the signal bandwidth of cross-channel problem. Cross-channel with the research and development of the broadband signal, the signal bandwidth is imminent. Retain the past channel technology on the basis of the good reception of narrowband signals how to deal with the broadband signal receiver, and a lot of computer simulation for the actual design of the receiver reference. The main work of this paper includes the following aspects: 1. Determine the several methods of signal analysis and adopt a the STFT-WVD joint analysis, retained WVD transform in the time and frequency axis has a very good focus advantages based on, in addition to the cross-term interference. These laid the foundation of this system simulation method of signal analysis. 2 channel judgment. Channel technology is only the judgment of a single channel, cross channel when the signal bandwidth, this judgment becomes helpless. On the basis of the reserved channel in the past judgment, the use of the singular point of the analysis, a channel judgment. Such judgment can not only by performing decision on the presence or absence of a single channel signal, but also can perform decision whether there is cross-channel signal bandwidth. Broadband and narrowband the signal digital receiver technology integrated modeling. Broadband signal data acquisition technology and channelized receiver technology intrinsically linked to the reconstruction of the signal cross-channel and combined channelized instantaneous frequency measurement technology, provides a simulation based on a wide narrowband signal digital receiver technology. A detailed analysis of the channelization filter group generation method, a vestigial sideband modulation method on the filter design calls for the generation condition of the prototype low-pass filter in the filter bank implemented by frequency shifting the filter group for the entire monitoring bandwidth coverage. Analysis of the advantages and disadvantages of the of several channels judgment way, and to determine a self-correlation detection spectrum data fitting judgments of positive and negative slope channel judgment. A large number of comprehensive simulation of the digital receiver technology from a single signal BPSK signal BER curves and single-frequency signal and a chirp signal frequency measurement error graph to dual signal BPSK signal BER graph and chirp signal frequency measurement error curve of reference for the realization of the actual receiver technology to provide computer simulation.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Electronic warfare ( jamming and anti - jamming ) > Reconnaissance problem > Signal reception and analysis
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