@article{oai:nagoya.repo.nii.ac.jp:00006143,
 author = {Wada, Tadahiro and Yamazato, Takaya and Katayama, Masaaki and Ogawa, Akira},
 journal = {1996 IEEE Global Telecommunications Conference- Communications : The Key to Global Prosperity -},
 month = {Nov},
 note = {In this paper, we discuss a non-coherent reception of M-ary spread-spectrum multiple-access (M-ary/SSMA) signals in the presence of large Doppler frequency shift. The Hadamard Codes (H-codes) is applied as orthogonal codes. The influence of Doppler frequency shift has a particular characteristic according to the property of H-codes. Making use of this property, we, first, propose an initial carrier frequency acquisition method which can estimate the value of large Doppler frequency shift. We, then, proposed a M-ary/SSMA scheme that is based on the simultaneous transmission of two distinctive H-codes.},
 title = {A New M-ary/SSMA Scheme Applicable in LEO Satellite Communication Systems},
 year = {1996}
}