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A new scheme of synchronous CDMA is introduced in the paper. The new scheme is based on a code made by all the cyclical translations of a basic sequence having constant amplitude and white discrete spectrum. Such a code is proposed here for the first time as a code for CDMA. According to the proposed scheme, a cyclic prefix is appended to the multiplexed signal. The proposed scheme has a property...
We introduce a new class of code sequences for synchronous CDMA, having in mind application to the downlink of cellular systems. The code that we propose is made by all the cyclical translations of what is called in the literature a CAZAC sequence, for example a Frank-Zadoff sequence. We show that, when the transmission channel is affected by multipath and noise, the proposed code allows multiuser...
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