Hybrid Carrier CDMA Communication System Based on Weighted-Type Fractional Fourier Transform

• Published in: IEEE communications letters Vol. 16; no. 4; pp. 432 - 435
• Main Authors: SHA, Xue-Jun, XIN QIU, LIN MEI
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.04.2012; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Bit error rate; Carriers; Channels; Code division multiple access; Convergence; Detection, estimation, filtering, equalization, prediction; Discrete Fourier transforms; Equalization; Exact sciences and technology; Fading; Fourier transforms; Frequency domain analysis; High speed; Hybrid carrier scheme; Information, signal and communications theory; Interference; Multicarrier code division multiple access; Signal and communications theory; Signal, noise; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); weighted-type fractional Fourier transform; Fading channels; Performance evaluation; Fading; Fourier transformation; Fractional Fourier transformation; Hybrid carrier scheme; Wireless telecommunication; Multicarrier; Frequency domain method; Single carrier; Equalization; Jamming; weighted-type fractional Fourier transform; Frequency selection; Telecommunication system; Code division multiple access; Compatibility
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2012.030512.111681

Recently, an approach based on carrier scheme convergence was proposed based on the weighted-type fractional Fourier transform (WFRFT). Meanwhile, in the high-speed wireless communication systems, code division multiple access (CDMA) is an efficient technique for interference in the frequency-selective fading channels. In this letter, we combine the hybrid carrier (HC) scheme with CDMA and frequency domain linear equalization. The proposed system can not only provide the compatibility with single carrier (SC) CDMA and multi-carrier (MC) CDMA systems, but also achieve a smooth and seamless transition between the two. The proposed system can switch to single carrier or multi-carrier scheme under the specific conditions. Moreover, HC-CDMA outperforms SC-CDMA and MC-CDMA systems over the frequency-selective fading channel and single frequency jamming channel.