49 research outputs found
A Method to Partially Suppress IS1 and MA1 for DS SS CDMA Wireless Networks
We propose a method to partially suppress ISI and MAI for US SS CDMA schemes in wireless LANs. The method can be regarded as an alternative approach to combat ISI and in particular MAI by the use of advanced multiuser detection. Instead of using very sophisticated detectors, we propose introduction of a simple modification to the carrier waveform which results in very substaiitial reduction in cross-correlation belween users and an off-peak auto-correlation. The method can be applied to any DS SS CDMA scheme, but should be particularly useful in the case of short spreading signatures, as is the case of WLAN
A Robust Adaptive MMSE Rake Receiver for DS-CDMA System in a Fast Multipath Fading Channel
In this paper, we propose a robust adaptive minimum mean square error (MMSE) Rake receiver for asynchronous DS-CDMA systems. The receiver uses the modified MMSE criterion that incorporates the differential detection and the amplitude compensation for interference cancellation in a time-varying multipath fading channel. We investigate that the proposed Rake receiver can achieve the higher output signal to interference plus noise ratio (SINR) than the conventional adaptive Rake receiver, since the modified MMSE criterion does not attempt to track the time-varying MMSE solution. Computer simulations verify that the performance of the proposed Rake receiver is better than those of the conventional and the adaptive Rake receiver
Performance study of air interface for broadband wireless packet access
Ph.DDOCTOR OF PHILOSOPH
Adaptive parallel interference cancellation receivers with diversity combining for multicarrier DS CDMA systems
Master'sMASTER OF ENGINEERIN
Link adaptation for MC-CDMA radio interface
EThOS - Electronic Theses Online ServiceGBUnited Kingdo
Antenna array calibration in wireless communications
Imperial Users onl