The file format is given in c language, can anyone tell me how can I write these code in Matlab
The code is given bellow
1) file starts with fileheader which consists of:
struct fileheader
{ char timestamp[25];
struct datablock dataBlock;
};
timestamp is a 25 character ascii string consisting of:-
stationname ( 3 char) + time when file was opened (space + 21 char)
datablock is as follows:-
struct datablock { char filetype; // filetypes are: 'I'= individual files, 'H' = one file per hour
int no of frequ;
unsigned char doppler series length;
int min height;
int max height;
unsigned char pulses per sec;
unsigned char noof pulses averaged;
int basethreshold100; // basethreshold100 = 100× min power (bits sq.) before save
int noisethreshold100; // noisethreshold100 = 100×multiplier for average noisepower (bits sq.) to set threshold based on noise
unsigned char minimum number of dopplers before saving;
int seconds between samples;
char gaincontrol; // gaincontrol: 'N'= none, or a number
char sigprocess; // sigprocess: 'F'=do FFT (then save all components above threshold),
'T'= timeseq (FFT, saves entire spectrum if any component is above threshold) or
'N'= none (save raw data)
unsigned char number of receivers;
unsigned char spares[11];
};
note on data storage in C language: char, unsigned char are 1 Byte; int are 2 Bytes
2) next the list of all the frequencies used is written to the file as floating point numbers (4 Bytes each)
3) next comes the data structured as follows:-
start of next_record:
time_min (Byte)
time_sec (Byte)
start of next_frequency:
gainflag (Byte: E0 (hex) to EF: EF = none)
noiseflag (Byte, F0 (hex) = basethreshold, F1 = noisethreshold)
averagenoisepower10 (unsigned int: 10×averagenoisepower)
start of next height:
hnum (Byte) virtual height is 3*hnum, for extended height range CADIs: if hnum > 200 then
hnum = hnum -200 and tnum = tnum + 128 (use high bit of tnum as a flag)
tnum (Byte): number of Doppler bins saved
for each of the tnum Doppler bins write:
{ data ((1+2xnumber of receivers) Bytes: Doppler bin # then 2 Bytes real, imaginary components for each receiver) }
if: more heights goto start of next height,
if: more frequencies goto start of next frequency, else (end of last frequency) so write
endfrequflag (Byte = FF (hex))
if: more records in the file then goto start next record
else end of file
