TY - GEN
T1 - Orthogonal variable spreading factor codes with zero-correlation zone for TS-UWB
AU - Wu, Di
AU - Spasojević, Predrag
AU - Seskar, Ivan
PY - 2005
Y1 - 2005
N2 - We propose an algorithm for construction of ternary orthogonal variable-spreading-factor (OVSF) codes with zero-correlation zone (ZCZ) of particular interest for ternary sequence based UWB (TS-UWB) systems. The conventional approach is to design OVSF codes based on Walsh codes and, in this case, the orthogonality of the corresponding OVSF codes is easily lost when the synchronism is lacking or in a multipath scenario. 2D OVSF codes possess ideal correlation properties which significantly improve the interference-rejection capability of the multicarrier DS-CDMA systems. However, 2D OVSF code schemes, applied over multiple orthogonal channels, suffer from the disadvantages of a high peak-to-average power ratio (PAPR) and high complexities on transceiver design. The proposed OVSF codes derived from two-dimensional (2D) OVSF codes present a ZCZ which allows for significant suppression of multipath and multiuser interference and keep the transceiver of impulse based UWB system simple.
AB - We propose an algorithm for construction of ternary orthogonal variable-spreading-factor (OVSF) codes with zero-correlation zone (ZCZ) of particular interest for ternary sequence based UWB (TS-UWB) systems. The conventional approach is to design OVSF codes based on Walsh codes and, in this case, the orthogonality of the corresponding OVSF codes is easily lost when the synchronism is lacking or in a multipath scenario. 2D OVSF codes possess ideal correlation properties which significantly improve the interference-rejection capability of the multicarrier DS-CDMA systems. However, 2D OVSF code schemes, applied over multiple orthogonal channels, suffer from the disadvantages of a high peak-to-average power ratio (PAPR) and high complexities on transceiver design. The proposed OVSF codes derived from two-dimensional (2D) OVSF codes present a ZCZ which allows for significant suppression of multipath and multiuser interference and keep the transceiver of impulse based UWB system simple.
KW - Orthogonal variable-spreading-factor (OVSF)
KW - Ternary sequence
KW - Ultra-wide band (UWB)
KW - Zero-correlation zone (ZCZ)
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U2 - 10.1109/WCNC.2005.1424611
DO - 10.1109/WCNC.2005.1424611
M3 - Conference contribution
AN - SCOPUS:24944577063
SN - 0780389662
T3 - IEEE Wireless Communications and Networking Conference, WCNC
SP - 807
EP - 812
BT - 2005 IEEE Wireless Communications and Networking Conference, WCNC 2005
T2 - 2005 IEEE Wireless Communications and Networking Conference, WCNC 2005: Broadband Wirelss for the Masses - Ready for Take-off
Y2 - 13 March 2005 through 17 March 2005
ER -