Modulatable orthogonal sequences and their application to SSMA systems
IEEE Transactions on Information Theory
On the generation and analysis of a modulated orthogonal sequence
Signal Processing
Principles of mobile communication (2nd ed.)
Principles of mobile communication (2nd ed.)
Mobile Channel Characteristics
Mobile Channel Characteristics
On Schemes for Multriate Support in DS-CDMA Systems
Wireless Personal Communications: An International Journal
Theory and Applications of Fractional Differential Equations, Volume 204 (North-Holland Mathematics Studies)
Performance of quasisynchronous scale time code division multiple access for AWGN channel
Computers and Electrical Engineering
Interference control and chip waveform design in multirate DS-CDMA communication systems
IEEE Transactions on Wireless Communications
Multiple-access interference reduction for QS-CDMA systems with a novel class of polyphase sequences
IEEE Transactions on Information Theory
The 3GPP proposal for IMT-2000
IEEE Communications Magazine
Performance of multi-processing gain QS-CDMA over AWGN and Rayleigh fading channels
Digital Signal Processing
Product of the powers of generalized Nakagami-m variates and performance of cascaded fading channels
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
A Generalized Suzuki Distribution
Wireless Personal Communications: An International Journal
| Hi-index | 0.00 |
Quasisynchronous (QS) Code Division Multiple Access (CDMA) is currently being considered for a variety of wireless applications and services because QS-CDMA enables information transmission with a good quality of service. In this paper, for M-ary signaling, the Symbol Error Rate (SER) performance of QS-CDMA communication system with a maximal ratio combiner (MRC) over frequency-selective, time-nonselective multipath Generalized Gamma (GG3) fading channels is derived not only for any deterministic spreading sequences but also for any chip-limited chip waveforms, and it is investigated for Rectangular, Half-Sine, and Raised-Cosine chip waveforms by means of numerical and simulation results. Numerical and simulation results show that the performance of QS-CDMA is as good as or slightly better than synchronous CDMA (S-CDMA) when the maximum quasisynchronous delays do not need to be less than some specific values depending on the path power scattering. With this flexibility of quasisynchronous delays, both the transmitter and receiver complexities are reduced as quasisynchronous communication is a challenging task for researchers. Additionally, since not only the spreading sequences but also the partial autocorrelation functions of the chip waveform are influential on the performance of multipath QS-CDMA, a measure, Partial Power Ratio (PPR) is defined based on these partial autocorrelation functions in order to select or design a chip waveform for quasisynchronous communication. Furthermore, results show that QS-CDMA using the chip waveform whose PPR is greater has better performance.