TY - JOUR
T1 - Effects of hopping codes in TH-SS UWB signals
AU - Wu, Wei De
AU - Wang, Chung-Hsuan
AU - Chao, Chi Chao
PY - 2003/10
Y1 - 2003/10
N2 - In this paper, we study the hopping code effects on the time-hopping spread-spectrum (TH-SS) ultra-wideband (UWB) signals to address the achievability of the desired signal properties. Specifically, we investigate the code features leading to the low averaged spectral power level and good receiver performance. For the former concern, an explicit relation between the hopping code and the power spectral density (PSD) is derived. Then two practical propositions about the averaged spectral power level are developed. For the receiver performance, we discuss the code features leading to low noise, narrowband interference (NBI), and multiple-access interference (MAI) by virtue of the filter interpretation of the RAKE combiner which is conventionally adopted in a UWB receiver. Notably, our work suggests to focus on finding/constructing those hopping sub-codes with proper spectrum properties instead of the entire codes.
AB - In this paper, we study the hopping code effects on the time-hopping spread-spectrum (TH-SS) ultra-wideband (UWB) signals to address the achievability of the desired signal properties. Specifically, we investigate the code features leading to the low averaged spectral power level and good receiver performance. For the former concern, an explicit relation between the hopping code and the power spectral density (PSD) is derived. Then two practical propositions about the averaged spectral power level are developed. For the receiver performance, we discuss the code features leading to low noise, narrowband interference (NBI), and multiple-access interference (MAI) by virtue of the filter interpretation of the RAKE combiner which is conventionally adopted in a UWB receiver. Notably, our work suggests to focus on finding/constructing those hopping sub-codes with proper spectrum properties instead of the entire codes.
UR - http://www.scopus.com/inward/record.url?scp=4143075790&partnerID=8YFLogxK
U2 - 10.1109/VETECF.2003.1285234
DO - 10.1109/VETECF.2003.1285234
M3 - Conference article
AN - SCOPUS:4143075790
SN - 0740-0551
VL - 58
SP - 1308
EP - 1312
JO - IEEE Vehicular Technology Conference
JF - IEEE Vehicular Technology Conference
IS - 2
T2 - 2003 IEEE 58th Vehicular Technology Conference, VTC2003-Fall
Y2 - 6 October 2003 through 9 October 2003
ER -