Normalised Least Mean-Square Aided Decision-Directed Adaptive Detection in Hybrid Direct-Sequence Time-Hopping UWB Systems

In this paper, Decision-Directed adaptive detection scheme based on Normalised Least Mean-Square (DD/NLMS) principles is proposed and investigated for the hybrid Direct-Sequence Time-Hopping Ultra-Wide Bandwidth (DS-TH UWB) system. The Bit-Error-Rate (BER) performance of the hybrid DS-TH UWB system is investigated when communicating over the UWB channels modelled by the Saleh-Valenzuela (S-V) channel model. Since both the pure DS-UWB and pure TH-UWB constitute special examples of the hybrid DS-TH UWB, their BER performance is also investigated in this contribution for sake of comparison with that of the hybrid DS-TH UWB.