The bit error rate (BER) performance of DS-CDMA in a frequency-selective fading channel can be significantly improved by the use of frequency-domain equalization (FDE). However, the presence of a residual inter-chip interference (ICI) after FDE distorts the orthogonality among the spreading codes and the BER performance of the multicode DS-CDMA degrades as the number of multiplex order increase...

We propose and experimentally demonstrate single-carrier adaptive frequency-domain equalization (SC-FDE) to mitigate multipath interference (MPI) for the transmission of the fundamental mode in a few-mode fiber. The FDE approach reduces computational complexity significantly compared to the time-domain equalization (TDE) approach while maintaining the same performance. Both FDE and TDE methods ...

Abstract In direct sequence code division multiple access (DS-CDMA) and multi-carrier (MC)-CDMA, frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion can be applied to exploit the channel frequency-selectivity and to improve bit error rate (BER) performance. In MC-CDMA uplink, however, the BER performance significantly degrades due to strong multi-user interfe...

Minimum mean square error frequency-domain equalization (MMSE-FDE) can achieve a good performance in the case of single-carrier (SC) transmission in a frequencyselective fading channel. The conventional FDE requires the insertion of guard interval (GI) to avoid the inter-block interference (IBI). However, the GI insertion reduces the throughput. Recently, overlap FDE which requires no GI insert...

Abstract In direct sequence code division multiple access (DS-CDMA), frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion can be applied to exploit the channel frequency-selectivity and therefore achieves much improved bit error rate (BER) performance than using the conventional rake combining. Even if FDE is applied to DS-CDMA, however, the uplink BER perform...

Abstract In direct sequence code division multiple access (DS-CDMA), frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion can be applied to exploit the channel frequency-selectivity and achieve a much improved bit error rate (BER) performance compared with the conventional rake combining. However, DS-CDMA with MMSE-FDE requires the insertion of guard interval ...

Abstract In direct sequence code division multiple access (DS-CDMA), frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion can be applied to exploit the channel frequency-selectivity and therefore can replace the conventional rake combining with a much improved bit error rate (BER) performance. For a small spreading factor, however, the residual inter-chip inte...