Title :
A combined OFDM-CsDMA approach to cellular mobile communications
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, Hong Kong
fDate :
7/1/1999 12:00:00 AM
Abstract :
We present a combined orthogonal frequency-division multiplexing (OFDM) and code-division multiple-access cellular system. It is derived from the OFDM model by introducing an extra code-shift division multiple access layer. This mitigates intercell interference without affecting intracell orthogonality and such property can be maintained in multipath environments. The new scheme is suitable for both up and down links. It retains the low-receiver complexity property of the OFDM system
Keywords :
OFDM modulation; adjacent channel interference; cellular radio; code division multiple access; interference suppression; multipath channels; multiuser channels; radio links; radio receivers; OFDM system; cellular mobile communications; code-division multiple-access; code-shift division multiple access layer; combined OFDM-CsDMA approach; down link; intercell interference; intracell orthogonality; low-receiver complexity; multipath environments; orthogonal frequency-division multiplexing; up link; Convolution; Discrete Fourier transforms; Equations; Frequency synchronization; Maximum likelihood estimation; Mobile communication; Multiaccess communication; Multiple access interference; OFDM; Quadrature amplitude modulation;
Journal_Title :
Communications, IEEE Transactions on
