Sciweavers

211 search results - page 13 / 43
» vtc 2006
Sort
View
VTC
2006
IEEE
15 years 4 months ago
Effects of Bit Allocation on Non-Contiguous Multicarrier-Based Cognitive Radio Transceivers
— In this paper, we evaluate a cognitive radio transceiver employing both non-contiguous multicarrier modulation (NC-MCM) and adaptive bit allocation. Although NCMCM and bit allo...
Alexander M. Wyglinski
VTC
2006
IEEE
158views Communications» more  VTC 2006»
15 years 4 months ago
An Adaptive-Scaling Algorithm for OFDM PAR Reduction Using Active Constellation Extension
Abstract— The Active Constellation Extension (ACE) technique is a lossless (in terms of throughput) Peak-to-Average Power Ratio (PAR) reduction technique that adaptively extends ...
Luqing Wang, Chintha Tellambura
VTC
2006
IEEE
101views Communications» more  VTC 2006»
15 years 4 months ago
Estimation of Time-Variant Channels for OFDM Systems Using Kalman and Wiener Filters
In this paper, two channel estimation schemes for OFDM systems are investigated in a time-variant channel. The orthogonality of the subcarriers is destroyed in a time-variant chann...
Hye Mi Park, Jae Hong Lee
VTC
2006
IEEE
15 years 4 months ago
Joint Frequency-Domain Differential Detection and Equalization for 2-Dimensional Spread/Chip-Interleaved DS-CDMA Uplink Transmis
—The multiple-access interference (MAI) limits the performance of the DS-CDMA uplink transmission. 2 dimensional (2D) spread/chip-interleaved DS-CDMA is an MAI-free system, where...
Le Liu, Fumiyuki Adachi
VTC
2006
IEEE
15 years 4 months ago
Accurate BER Analysis of Asynchronous DS-CDMA Systems in Ricean Channels
— The accurate Bit Error Rate (BER) calculation of an asynchronous Ricean-faded DS-CDMA system using random spreading sequences and BPSK modulation is studied in this paper. A ne...
Xiang Liu, Lajos Hanzo