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Channel pre- and post-equalization in uplink OFCDM systems with mobility | IEEE Conference Publication | IEEE Xplore

Channel pre- and post-equalization in uplink OFCDM systems with mobility


Abstract:

In this paper, we propose an up-link orthogonal frequency and code division multiplexing (OFCDM) mobile cellular system that uses channel pre-equalization at the mobile t...Show More

Abstract:

In this paper, we propose an up-link orthogonal frequency and code division multiplexing (OFCDM) mobile cellular system that uses channel pre-equalization at the mobile terminal (MT) and adaptive detection at the base station (BS). Assuming a time division duplex that may offer channel reciprocity between down- and up-links, a low-complexity channel pre-equalization avoids explicit channel estimation at the BS with a very good performance for low MT velocities. A data-aided adaptive detection at the BS starting directly in a tracking mode thanks to pre-equalization can compensate for the increasing mismatch between channel pre-equalization and actual channel response caused by large velocities all along the uplink frame. Simulation results using a 4G realistic scenario show that the proposed uplink OFCDM system offers a good performance with a high spectral efficiency, as it is able to transmit large data rates with mobility and no need of pilot symbols.
Date of Conference: 07-10 September 2003
Date Added to IEEE Xplore: 19 February 2004
Print ISBN:0-7803-7822-9
Conference Location: Beijing, China

References

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