Abstract
There has been a great deal of recent interest in the me of direct sequence spread spectrum (DSSS) in combination with multicarrier modulation (MCM). Although the proposed system implementations in the literature vary, all of these systems share the functionality of DSSS, MCM, and some form of a branch combiner at the receiver. This paper investigates the performance of such a system transmitting through a Doppler spread channel In fast fading the proposed system performance exhibits an irreducible bit error probability (BEP) even for the single user case. Dramatic performance improvements can be realized with the use of a maximal ratio combiner (MRC). Finally, we investigate the effect of a more realistic branch combiner which utilizes the output from a channel gain averager for the receiver combiner weights.
Work of R.E. Ziemer supported in part by the Office of Naval Research under contract N00014-920- JO 1761/P00004
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© 1997 Springer Science+Business Media Dordrecht
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Welch, T.B., Ziemer, R.E. (1997). Simulation of a DSSS/MCM System in a Doppler Spread Channel. In: Fazel, K., Fettweis, G.P. (eds) Multi-Carrier Spread-Spectrum. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-6231-3_26
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DOI: https://doi.org/10.1007/978-1-4615-6231-3_26
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