OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
Complex Hadamard matrices related to Bent sequences
IEEE Transactions on Information Theory
New lower bounds on aperiodic crosscorrelation of binary codes
IEEE Transactions on Information Theory
Quasi-orthogonal sequences for code-division multiple-access systems
IEEE Transactions on Information Theory
A class of pseudonoise sequences over GF(P) with low correlation zone
IEEE Transactions on Information Theory
Orthogonal sets of quadriphase sequences with good correlation properties
IEEE Transactions on Information Theory
IEEE Communications Magazine
The most spectrum-efficient duplexing system: CDD
IEEE Communications Magazine
The perspectives of large area synchronous CDMA technology for the fourth-generation mobile radio
IEEE Communications Magazine
Gold codes, Hadamard partitions and the security of CDMA systems
Designs, Codes and Cryptography
Zero-Correlation Zone Sequence Set Constructed from a Perfect Sequence
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
A Novel Class of Zero-Correlation Zone Sequence Sets Constructed from a Perfect Sequence
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
New Families of Binary Low Correlation Zone Sequences Based on Interleaved Quadratic Form Sequences
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Efficient generation and correlation of sequence pairs with three zero-correlation zones
IEEE Transactions on Signal Processing
The Application of Frequency Assignment Techniques in Spreading Code Assignment
Wireless Personal Communications: An International Journal
COMSNETS'10 Proceedings of the 2nd international conference on COMmunication systems and NETworks
IEEE Transactions on Information Theory
Generalized bounds on partial aperiodic correlation of complex roots of unity sequences
SETA'06 Proceedings of the 4th international conference on Sequences and Their Applications
Sequence design for MPG QS-CDMA systems based on heuristic combinatorial optimization
Wireless Communications & Mobile Computing
Phase Coded Waveform Design for Sonar Sensor Network
Mobile Networks and Applications
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For various quasisynchronous (QS) CDMA systems such as LAS-CDMA system which emerged recently, in order to reduce or eliminate the multiple access interference and multipath interference, it is required to design a set of spreading sequences which are mutually orthogonal within a designed shift zone, called orthogonal zone. For traditional orthogonal sequences, such as Walsh sequences and orthogonal Gold sequences, the orthogonality can only be achieved at the inphase point; in other words, the orthogonality is destroyed whenever there is a relative shift between the sequences, that is, their orthogonal zone is 0. In this paper, new concepts of generalized orthogonality (GO) and generalized quasiorthogonality (GQO) for spreading sequence design in both direct sequence (DS) QS-CDMA systems and time/frequency hopping (TH/FH) QS-CDMA systems are presented. Besides, selected GO/GQO sequence designs and general theoretical periodic and aperiodic limits, together with several applications in QS-CDMA systems, are also reviewed and analyzed.