Adaptive filter theory (2nd ed.)
Adaptive filter theory (2nd ed.)
Space-Time Optimum Combining for CDMA Overlay for Personal Communications Systems
Wireless Personal Communications: An International Journal
Blind Adaptive Suppression of Narrowband Digital Interferers from Spread Spectrum Signals
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
Projection approximation subspace tracking
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
A new narrowband interference suppression scheme forspread-spectrum CDMA communications
IEEE Transactions on Signal Processing
Adaptive Blind Narrowband Interference Cancellation for Multi-User Detection
IEEE Transactions on Wireless Communications
Blind multiuser detection: a subspace approach
IEEE Transactions on Information Theory
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This paper deals with narrowband interference (NBI) and multiple access interference (MAI) suppression based on subspace-based approaches for direct-sequence code-division multiple-access (DS-CDMA) systems. First, the signal subspace-based and the interference subspace-based techniques are developed to estimate the noisy DS-CDMA signal and the interference signal, respectively. In conjunction with a modified multiple constrained minimum variance multiuser detector, we develop two efficient schemes to deal with the NBI and MAI that do not need any prior knowledge about the characteristics of the interference and specific training sequence. Next, an adaptive implementation based on a signal subspace tracking algorithm and a recursive least mean square algorithm is also developed. Several computer simulation examples in terms of bit error rate are provided for illustrating the effectiveness of the proposed schemes.