Abstract
In [11] the combination of multitone modulation with direct sequence spectrum spreading has been introduced. The performance of a correlation receiver has been evaluated for a multipath channel. In [12] the analysis has been extended to the presence of a multiple access interference. In the present paper we analyze the equalization problem of such a system for a single user scenario. In order to understand the potential of the system we first investigate the steady-state behavior of the MIMO equalizer for an MMSE design. The investigation is carried out for an equalizer following a receiver made of a bank of filters matched to both the symbol shape and the channel, which is a two-path channel. Assuming BPSK symbols an exact expression of the bit error probability before and after equalization is obtained in the form of an integral by means of the characteristic function method. Next adaptive LMS and RLS structures are proposed. The performance of the RLS algorithm is demonstrated.
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This author would like to thank the Belgian NSF for its financial support.
This author is a Research assistant of FRIA.
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Vandendorpe, L., Van De Wiel, O. Performance analysis of linear MIMO equalizers for multitone DS/SS systems in multipath channels. Wireless Pers Commun 2, 145–165 (1995). https://doi.org/10.1007/BF01099535
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DOI: https://doi.org/10.1007/BF01099535