The invention as defined in claim 4 wherein said generated sequences are of the form Si={f0 s i , f1 s i , . . . fk s i , . . . } and said Latin square based sequences are generated in accordance with fk s i =(ak+si) mod p, where p, a and si are integers, p is a prime number or a power of a prime number, k is a dwell time interval index, and the periodicity of the Latin Square sequence is p.