A novel transmitter design for GLSFBC–OFDM–CDMA communication systems

Relying on mutual orthogonality between subcarriers of different users in orthogonal frequency-division multiple access (OFDMA) systems and mutual orthogonality between spreading codes in code-division multiple-access (CDMA) systems, a novel transmitter design is proposed for group layered space–fre...

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Bibliographic Details
Published inSignal processing Vol. 87; no. 9; pp. 2251 - 2259
Main Authors Zhan, Jinlong, Liao, Guisheng, Li, Guomin
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.09.2007
Elsevier Science
Subjects
Applied sciences
CDMA
Coding, codes
Detection, estimation, filtering, equalization, prediction
Exact sciences and technology
Group interference suppression
Information, signal and communications theory
Miscellaneous
Multiplexing
OFDM
Signal and communications theory
Signal processing
Signal, noise
Space–frequency code
Telecommunications and information theory
Space–frequency code
CDMA
OFDM
Group interference suppression
Block code
Noise reduction
Wireless telecommunication
Frequency division multiple access
Transmitter
Subcarrier
Frequency selection
Space-frequency code
Receiving antenna
Multilevel system
Fading channels
Fading
Multiple access
Space diversity
Orthogonality
Interference suppression
Simulation
Intersymbol interference
Telecommunication system
Code division multiple access
Orthogonal frequency division multiplexing
Signal processing
Frequency diversity
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Summary:Relying on mutual orthogonality between subcarriers of different users in orthogonal frequency-division multiple access (OFDMA) systems and mutual orthogonality between spreading codes in code-division multiple-access (CDMA) systems, a novel transmitter design is proposed for group layered space–frequency block code (GLSFBC)–OFDM–CDMA communication systems over frequency-selective fading channels. The proposed method is based on a three-level design of user codes: the top level (based on OFDMA) deals with group interference and intersymbol interference (ISI), the middle level (based on space–frequency block coding) results in space–frequency diversity, and the lower level (based on CDMA) handles multiuser interference. The new approach only needs one receive antenna to distinguish multiple users and suppress group interference simultaneously, so the complexity of the receiver decreases remarkably. Simulation results confirm the validity of the proposed technique.
ISSN:0165-1684
1872-7557
DOI:10.1016/j.sigpro.2007.01.018