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Array of signal direction -based channel estimation and DSP implementation study

Author: YiJun
Tutor: HeZiShu
School: University of Electronic Science and Technology
Course: Signal and Information Processing
Keywords: Digital channelized receiver DOA DSP
CLC: TP332
Type: Master's thesis
Year: 2007
Downloads: 214
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Abstract


With the development of electronics, information technology , modern electronic warfare requirements reconnaissance receiver must have a wide input bandwidth , high - sensitivity , high-resolution , large dynamic range , able to adapt to the modern high - intensive signal received real-time data or quasi- real-time processing features. This article is based on a new type of digital channelized receiver using DSP to complete follow - up data channel after processing , the direction of the source estimates . The traditional method of radio direction amplitude comparison method , the phase comparison method ( interferometer method) . In recent decades , the rapid development of signal processing techniques , estimated source direction can be achieved not only super-resolution array signal processing technology , and anti-interference performance greatly enhanced . With the development of integrated circuit manufacturing technology , DSP chip performance is greatly improved. The article uses integrated the the 4 DSP chip 21160 PCI interface digital signal processing board of Hammerhead-PCI as the hardware platform , the use of modern array signal DOA the spectrum estimation technology , the band is estimated on the the broadband surveillance closing Signal . The channelized receiver receives a large amount of data are real-time or near real-time processing requirements , the DOA estimation algorithm selection , and focus on calculating the amount of estimated accuracy considerations . Non- coherent source based on the uniform linear array , respectively, try using the MUSIC algorithm MVDR algorithm , complete on each channel data of measured respectively to ; case of coherent sources , using before to smooth solutions coherence of the MUSIC algorithm to complete measurement to ; uniform circular array used the MVDR algorithm to complete the two-dimensional estimation of the direction of the source . This paper also discusses the validation of the channel is divided into the number of estimated results ; discussion verify the number of sensors , signal-to-noise ratio , sampling data , the number of snapshots estimated results ; the discussion verify this space spectral estimation the resolution of the system on the signal source .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Electronic digital computer (not a continuous role in computer ) > Arithmetic unit and the controller (CPU)
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