Balanced quadriphase sequences with near-ideal autocorrelations

We describe a generalization of balanced binary sequences to quadriphase sequences. Given any prime p/spl equiv/1 mod4 and any positive integer m, a class of balanced quadriphase sequences of length p/sup m/-1 with near-ideal periodic autocorrelation properties is constructed. The quadriphase sequences are optimal under the condition of balanced sequence elements.