Title :
A multicarrier interleave-division uwb system
Author :
Yang, Kai ; Wang, Xiaodong
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY
fDate :
7/1/2006 12:00:00 AM
Abstract :
We propose a multicarrier interleave-division multiple-access scheme for ultra-wideband wireless communications. For the uplink, a chip-level interleaving method at the transmitter with a simple turbo receiver is proposed to effectively suppress the frequency-selective fading and multiple-access interference. Both hard and soft frequency notching methods are suggested to suppress the narrowband interference. For the downlink, a two-layer interleaving scheme is proposed, in which data from different users are separated in the frequency-domain while the different data streams for the same user are separated in the interleaver-domain. A joint power and subcarrier allocation algorithm is developed to exploit the multiuser diversity and thereby improve the system performance. The performance of the proposed system is evaluated by both theoretic analysis and simulations. It is seen that within a few iterations, the proposed system exhibits single-user performance even under over-loaded conditions
Keywords :
diversity reception; fading; interference suppression; multi-access systems; radio links; radiofrequency interference; ultra wideband communication; chip-level interleaving method; frequency notching methods; frequency-selective fading; multicarrier-interleave-division UWB system; multiple-access interference; multiple-access scheme; multiuser diversity; narrowband interference suppression; subcarrier allocation algorithm; transmitter; turbo receiver; two-layer interleaving scheme; ultra-wideband wireless communications; Downlink; Fading; Frequency; Interference suppression; Interleaved codes; Multiple access interference; Narrowband; Transmitters; Ultra wideband technology; Wireless communication;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2006.1673094