Title :
Performance of a wireless MC-CDMA system with an antenna array in a fading channel: reverse link
Author :
Kim, Chan Kyu ; Cho, Yong Soo
Author_Institution :
Broadcasting Technol. Lab., Electron. & Telecommun. Res. Inst., Taejon, South Korea
fDate :
8/1/2000 12:00:00 AM
Abstract :
We propose a multicarrier code-division multiple-access (MC-CDMA) system employing an antenna array at the base station, and analyze the performance of the MC-CDMA system in a fading channel. An optimal beamformer not requiring explicit direction of arrival estimation or training signals is derived for the MC-CDMA system in the reverse link, and is shown to reduce interferences from other users significantly, thus increasing the system´s user capacity. Also, it is shown that the MC-CDMA approach can achieve better performance than the direct-sequence CDMA approach when both approaches employ the code filtering technique for the antenna array
Keywords :
antenna arrays; array signal processing; cellular radio; code division multiple access; fading channels; filtering theory; interference suppression; multiuser channels; personal communication networks; radio links; radiofrequency interference; BER; DS-CDMA; antenna array; base station; cellular communication; code filtering; covariance matrix; direct-sequence CDMA; error probability; fading channel; frequency synchronization; interference reduction; multicarrier code-division multiple-access; optimal beamformer; performance analysis; personal communication; reverse link; timing synchronization; user capacity; wireless MC-CDMA system; Antenna arrays; Base stations; Covariance matrix; Direction of arrival estimation; Fading; Interference; Multiaccess communication; Multicarrier code division multiple access; Performance analysis; Sensor arrays;
Journal_Title :
Communications, IEEE Transactions on
