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+function seq = lteZadoffChuSeq(R, N)
+// This function generates root Zadoff-Chu sequence of complex symbols as per LTE specifications.
+//
+// Calling sequence
+// SEQ = LTEZADOFFCHUSEQ(R, N)
+//
+// Description
+// SEQ = LTEZADOFFCHUSEQ(R, N) generates the Rth root Zadoff-Chu sequence (SEQ)
+// of length N.
+
+// Examples
+// seq1 = lteZadoffChuSeq(2, 3)
+// disp(seq1,'seq1')
+// Error should occur because inputs are not co primes
+// seq2 = lteZadoffChuSeq(25, 5)
+// disp(seq2,'seq2')
+
+
+// Bibliography
+// 3rd Generation Partnership Project, Technical Specification Group Radio
+// Access Network, Evolved Universal Terrestrial Radio Access (E-UTRA),
+// Physical channels and modulation, Release 10, 3GPP TS 36.211, v10.0.0,
+// 2010-12.
+
+// Authors
+// Pola Lakshmi Priyanka, IIT Bombay//
+
+//*************************************************************************************************************************************//
+
+//Input argument check
+[out_a,inp_a]=argn(0)
+
+if inp_a~=2 then
+ error('comm:lteZadoffChuSeq:Invalid number of input arguments')
+end
+
+if out_a>1 then
+ error('comm:lteZadoffChuSeq:Invalid number of output arguments')
+end
+
+// Error Check for input arguments
+if(~isscalar(R) | ~or(type(R)==[1 5 8]) | ~isreal(R) | R==%inf | R~=floor(R) | R<=0) then
+ error('comm:lteZadoffChuSeq: Input argument 1 should be a finite positive integer')
+end
+
+if(~isscalar(N) | ~or(type(N)==[1 5 8]) | ~isreal(N) | N==%inf | N~=floor(N) | N<=0 | modulo(N,2)==0) then
+ error('comm:lteZadoffChuSeq:Input argument 2 is invalid')
+end
+
+if(gcd(uint8([R N])) ~= 1) then
+ error('comm:lteZadoffChuSeq:Both the input arguments should be co primes')
+end
+
+
+m = (0:N-1).';
+seq = exp( -complex(0,1) * %pi * R * m.*(m+1) / N );
+
+endfunction