TY - GEN
T1 - Differential UWB communications with digital multi-carrier modulation
AU - Xu, Huilin
AU - Yang, Liuqing
PY - 2006
Y1 - 2006
N2 - As a high-rate alternative of impulse radio (IR) ultra-wideband (UWB) communications, analog and digital multi-carrier UWB radios with coherent detection have been introduced in [1], [7], [10]. In this paper, we investigate digital multi-carrier differential (MCD) modulation and demodulation schemes for UWB. In our approach, the differential encoding and decoding are carried Out across multiple digital carriers in the frequency domain. Hence, channel estimation is bypassed by using neighboring carriers as reference carriers. Compared with the transmitted reference (TR) UWB which relies on delaying and correlating received segments in time domain, our MCD-UWB avoids the need for the analog delay element. In addition, our digital carrier based approach does not incur any spectrum expansion. We also show that our approach enables variable data rates, and remains operational even in the presence of severe inter-frame interference (IFI). In addition, the small spacing between differentially encoded carriers guarantees that the data rate is not limited by the channel coherence bandwidth. Simulations are also carried out to support our theoretical analysis.
AB - As a high-rate alternative of impulse radio (IR) ultra-wideband (UWB) communications, analog and digital multi-carrier UWB radios with coherent detection have been introduced in [1], [7], [10]. In this paper, we investigate digital multi-carrier differential (MCD) modulation and demodulation schemes for UWB. In our approach, the differential encoding and decoding are carried Out across multiple digital carriers in the frequency domain. Hence, channel estimation is bypassed by using neighboring carriers as reference carriers. Compared with the transmitted reference (TR) UWB which relies on delaying and correlating received segments in time domain, our MCD-UWB avoids the need for the analog delay element. In addition, our digital carrier based approach does not incur any spectrum expansion. We also show that our approach enables variable data rates, and remains operational even in the presence of severe inter-frame interference (IFI). In addition, the small spacing between differentially encoded carriers guarantees that the data rate is not limited by the channel coherence bandwidth. Simulations are also carried out to support our theoretical analysis.
UR - http://www.scopus.com/inward/record.url?scp=41649111370&partnerID=8YFLogxK
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U2 - 10.1109/ICU.2006.281514
DO - 10.1109/ICU.2006.281514
M3 - Conference contribution
AN - SCOPUS:41649111370
SN - 142440102X
SN - 9781424401024
T3 - ICUWB2006: 2006 IEEE International Conference on Ultra-Wideband - Proceedings
SP - 49
EP - 54
BT - ICUWB2006
PB - IEEE Computer Society
T2 - ICUWB2006: 2006 IEEE International Conference on Ultra-Wideband
Y2 - 24 September 2006 through 27 September 2006
ER -