Title :
Broadband VSF-OFCDM systems with hybrid MCI cancellation and MMSE detection
Author :
Zhou, Y.Q. ; Wang, J.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., China
Abstract :
An analytical study is presented on the performance of the variable spreading factor orthogonal frequency and code division multiplexing (VSF-OFCDM) system with hybrid multi-code interference (MCI) cancellation and minimum mean square error (MMSE) detection. The weights of MMSE are derived, and should be updated stage by stage of MCI cancellation. Various values of time and frequency domain spreading factors are dealt with in a QPSK-modulated VSF-OFCDM system. It is shown that the hybrid detection scheme performs much better than the conventional MMSE. For the hybrid detection, a larger value of the frequency domain spreading factor is expected.
Keywords :
4G mobile communication; OFDM modulation; code division multiplexing; interference suppression; least mean squares methods; multiuser detection; quadrature phase shift keying; spread spectrum communication; MMSE detection; QPSK; broadband VSF-OFCDM systems; frequency domain spreading factor; hybrid MCI cancellation; hybrid multi-code interference cancellation; minimum mean square error; orthogonal frequency and code division multiplexing; performance; time domain spreading factor; variable spreading factor; Code division multiplexing; Fading; Frequency domain analysis; Interference cancellation; Mean square error methods; Noise measurement; OFDM; Performance analysis; Quadrature phase shift keying; Quality of service;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th
Print_ISBN :
0-7803-8255-2
DOI :
10.1109/VETECS.2004.1390538
