Wavelet-based orthogonal modulation code

We suggest a new wavelet-based orthogonal modulation code set for multiple access, using various orthogonal scale functions and mother wavelets. Specifically we compare the bandwidth of these new wavelet-based orthogonal modulation codes with that of traditional orthogonal codes based on the Hadamard matrix and impulse function. The bandwidths of these wavelet-based modulation codes strongly depend on the choice of wavelets and scale functions which are used to generate these new codes. Generally speaking, we find that the bandwidths of these new modulation codes are considerably smaller than those of the orthogonal code set based on the Hadamard matrix and impulse function.