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Fractionally spaced Rake (FSRake) reception is proposed for non-coherent direct sequence ultra wideband (DS-UWB) wireless communication systems. In the FSRake reception, output signal of the pulse matched filter is sampled with a faster sampling rate than the chip rate of DS-UWB signal. Computer simulation is conducted to evaluate the performance of FSRake receiver in DS-UWB wireless system with M-ary...
This paper describes a modulation scheme for TH- UWB systems using pulse position modulated (PPM). For this scheme, a set of overlapped and orthogonal signals are transmitted simultaneously in the same time slot resulting in a composite pulse. And the signals have been discussed analytically for AWGN and multi-path channels. The proposed scheme can achieve an excellent BER performance by using one...
This paper proposes fractionally spaced selective Rake (FSRake) receiver for M-ary bi-orthogonal keying based direct sequence ultra wideband (MBOK DS-UWB) wireless systems. Conventional Rake receiver combines resolved matched filter outputs by sampling with pulse duration. In the proposed FSRake reception, matched filter output is sampled by the fractional duration of pulse. A certain number of strongest...
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