Title :
High speed wireless turbo-coded OFCDM systems
Author :
Zhou, Yiqing ; Wang, Jiangzhou
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., China
Abstract :
Orthogonal frequency and code division multiplexing (OFCDM) systems have been introduced for high speed data transmission in future wireless mobile communications. In this paper, a hybrid multicode interference cancellation (MCI) and minimum mean square error (MMSE) detection scheme is presented for the turbo-coded OFCDM systems. Channel estimation based on a code-multiplexed pilot channel is employed. The weights of hybrid detection are derived and an effective method is proposed to estimate the weights in practical applications. By means of computer simulation, the system performance is studied to show how it is affected by parameters such as modulation schemes, the number of stages of the hybrid detection, the power ratio of pilot to data channels, spreading factor, and so on.
Keywords :
OFDM modulation; channel estimation; code division multiplexing; data communication; least mean squares methods; mobile radio; turbo codes; CDM; MMSE detection scheme; OFDM; channel estimation; code division multiplexing; high speed data transmission; high speed wireless turbo-code; minimum mean square error; orthogonal frequency division multiplexing; wireless mobile communications; Channel estimation; Code division multiplexing; Data communication; Frequency; Interference cancellation; Mean square error methods; Mobile communication; OFDM; Turbo codes; Wireless communication;
Conference_Titel :
Wireless Networks, Communications and Mobile Computing, 2005 International Conference on
Print_ISBN :
0-7803-9305-8
DOI :
10.1109/WIRLES.2005.1549448
