Signal declaration and use

What kind of problem? have you simulated this code and does it do what you expect? What is your question?

When do you plan to replace these constants?

Currently, your code does nothing more than create an infinite loop (a process must have a sensitivity list OR wait statements or it will loop forever) and generates nothing more than constant values.

The original goal was to write this MATLAB file in VHDL in an attempt to have faster processing due to parallel processing. This project is part of FSU's EEL3705L requirements. Evidently reading the supporting MATLAB data files are a VHDL programming problem in themselves so my professor suggested making the data files a constant. The same was considered for the output calculations as the data files would need converting back to a .MAT file.

My current task is to get the program to simulate. The abbreviated sif and cal constants are placeholders for compilation purposes. I should get constants as out put as the original .m file generated constants for the follow on .m file

%

%This RMA SAR algorithm was written by Gregory L. Charvat as part of his dissertation:

%G. L. Charvat, ``A Low-Power Radar Imaging System," Ph.D. dissertation,

%Dept. of Electrical and Computer Engineering, Michigan State University,

%East Lansing, MI, 2007.

%

%Please cite appropriately.

%

%This algorithm was based on:

%Range Migration Algorithm from ch 10 of Spotlight Synthetic Aperture Radar

%Signal Processing Algorithms, Carrara, Goodman, and Majewski

%

%The radar system used here is from the following sources:

%G. L. Charvat. "Build a high resolution synthetic aperture radar imaging system in your backyard," MIT Haystack Observatory, May 12, 2010.

%G. L. Charvat. "Low-Cost, High Resolution X-Band Laboratory Radar System for Synthetic Aperture Radar Applications." Austin Texas: Antennas Measurement Techniques Association conference, October 2006.

%G. L. Charvat, L. C. Kempel. "Low-Cost, High Resolution X-Band Laboratory Radar System for Synthetic Aperture Radar Applications." East Lansing, MI: IEEE Electro/Information Technology Conference, May 2006.

%G. L. Charvat, "Low-cost, high-resolution, X-band laboratory radar system for synthetic aperture radar applications," Michigan State University Chapter of the IEEE, January 31, 2007

%

%Radar specifications:

% LFM chirp from 7.835 GHz - 12.817 GHz in 10 mS

% TX power = 15 dBm

% TX and RX beamwidth = 25 deg both E and H planes

% rail SAR length is 96"

% cross-range sample spacing = 1"

%

%Data: Target scene of pushpins (thumbtacks). Acquired in May of 2006 while in graduate school as part of the

%Electromagnetics Group at Michigan State University

clear all;

c = 3E8; %(m/s) speed of light

%*********************************************************************

%load IQ converted data here

load rback_cl s; %load variable sif %for background subtraction cal data

%*********************************************************************

%perform background subtraction

sif_sub = s;

load rgostate_cl s; %load variable sif %for image data

sif = s - sif_sub; %perform coherent background subtraction

%sif = s; %image without background subtraction

%sif = sif_sub; %image the background

clear s ss;

clear sif_sub;

%***********************************************************************

%radar parameters

fc = (12.817E9 - 7.835E9)/2 +7.835E9; %(Hz) center radar frequency

B = (12.817E9 - 7.835E9); %(hz) bandwidth

cr = B/10E-3; %(Hz/sec) chirp rate

Tp = 10E-3; %(sec) pulse width

%VERY IMPORTANT, change Rs to distance to cal target

Xa = 0; %(m) beginning of new aperture length

delta_x = 1*(1/12)*0.3048; %(m) 2 inch antenna spacing

L = delta_x*(size(sif,1)); %(m) aperture length

Xa = linspace(-L/2, L/2, (L/delta_x)); %(m) cross range position of radar on aperture L

Za = 0;

t = linspace(0, Tp, size(sif,2)); %(s) fast time, CHECK SAMPLE RATE

Kr = linspace(((4*pi/c)*(fc - B/2)), ((4*pi/c)*(fc + B/2)), (size(t,2)));

%************************************************************************

%callibration

load rcal71 s; %load callibration file to standard target

Rs = (71/12)*.3048; %(m) y coordinate to scene center (down range), make this value equal to distance to cal target

Ya = Rs; %SEE GEOMETRY FIGURE 10.6

s_cal = s;

load rcalback s; %load background data for cal to standard target

s_cal = s_cal - s; %perform background subtraction

cal = s_cal;

%calculate ideal cal target parameters

%target parameters, 3 targets

at1 = 1; %amplitude of cal target

xt1 = 0;

yt1 = Rs; %(m) distance to cal target

zt1 = 0;

%Rt and Rb for 1 cal target according to equation 10.26

Rb1 = sqrt((Ya - yt1)^2 + (Za - zt1)^2);

xa = 0;

Rt1 = sqrt((xa - xt1).^2 + Rb1^2);

Kr = linspace(((4*pi/c)*(fc - B/2)), ((4*pi/c)*(fc + B/2)), (size(t,2))); %according to range defined on bottom of page 410

for ii = 1:size(t,2) %step thru each time step to find phi_if

phi_if1(ii) = Kr(ii)*(Rt1 - Rs);

end

cal_theory = at1*exp(-j*phi_if1);

clear phi_if1;

%calculate the calibration factor

cf = cal_theory./(cal);

%apply the cal data

for ii = 1:size(sif,1)

sif(ii,:) = sif(ii,:).*cf; %turn off cal

end

%Save background subtracted and callibrated data

save sif sif delta_x Rs Kr Xa Rs;

%clear all;

%run IFP

XBAND_RMA_IFP;

I'm now getting this when I compile.

Info (12021): Found 2 design units, including 1 entities, in source file project.vhd

Info (12022): Found design unit 1: project-Numbers_Crunch

Info (12023): Found entity 1: project

Error (10482): VHDL error at project.vhd(31): object "complex_vector" is used but not declared

Error: Quartus II 32-bit Analysis & Synthesis was unsuccessful. 1 error, 1 warning

Error: Peak virtual memory: 328 megabytes

Error: Processing ended: Mon Nov 18 15:28:31 2013

Error: Elapsed time: 00:00:02

Error: Total CPU time (on all processors): 00:00:01

Error (293001): Quartus II Full Compilation was unsuccessful. 3 errors, 1 warning

How do I correct this, "Error (10482): VHDL error at project.vhd(31): object "complex_vector" is used but not declared"