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Differential TDMA impulse radio systems using delay-sum scheme in UWB channel

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2 Author(s)
Qi Zhang ; Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore ; Chun Sum Ng

Ultra wide-band (UWB) communication systems are expected to operate in a highly frequency-selective multipath fading environment. Multipath diversity gains can be collected to provide enhanced performance. To this end, we developed a differential time division multiple access (TDMA) impulse radio scheme that is tailored for multi-user UWB communications. In the system, the differential detector is adopted. The detector, when properly combined with the TDMA system, can fully exploit the multipath diversity of UWB channels. A novel delay-sum scheme is employed at the receiver to mitigate multi-user interference (MUI) and additive white Gaussian noise (AWGN). The proposed system shows better bit-error-rate (BER) performance than the conventional time-hopping impulse radio (TH-IR) system at high signal-to-noise ratio (SNR). Application of the system is promising because the receiver only needs to entail simple delay, integral and compare operations at the symbol rate

Published in:

Global Telecommunications Conference, 2005. GLOBECOM '05. IEEE  (Volume:6 )

Date of Conference:

2-2 Dec. 2005

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