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Interference-free code design for MC-CDMA uplink transmissions

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3 Author(s)
Luca Sanguinetti ; University of Pisa, Department of Information Engineering, Via Caruso 56126 Pisa, Italy. ; Lorenzo Taponecco ; Michele Morelli

In a recent study, solutions have been proposed for completely suppressing the multiple access interference (MAI) arising in the uplink of a quasi-synchronous multicarrier code-division multiple-access network as a consequence of multipath distortions and carrier frequency offsets. This result is achieved by employing exponential orthogonal codes or selecting a particular subset of the Walsh-Hadamard code family without the need for any channel state information at the transmitter side. In the present letter, we revisit this problem and show that MAI suppression can be achieved by following a different line of reasoning which leads to a transmission scheme exhibiting a lower peak-to-average power ratio.

Published in:

IEEE Transactions on Wireless Communications  (Volume:8 ,  Issue: 11 )