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Due to the severe and complicated multipath fading of the ultra-wideband (UWB) impulses, it is difficult to theoretically analyze the detection performance of the adaptive multiuser detector. By modulating the reference with a simple pseudo-random code, we have proposed an analog LMS multiuser detection in transmitted-reference UWB system. Here, the steady-state performances of this algorithm are...
The estimation of receiving impulse template can be simplified by the transmitted reference (TR) signaling scheme in ultra-wideband communication. However, in multiuser environment, the TR scheme would be severely interfered for its non-coherence. By modulating the transmitted-reference with a pseudo-random code, we propose an analog LMS detection based on minimum mean-square error criterion to suppress...
The conventional higher order statistics based multiuser detections suffer the local minima in cost function. A blind adaptive algorithm using least mean fourth (LMF) criterion is introduced here. The criterion is proved to be globally convergent, and the weights of the stable extremum satisfy the requirement of multi-access interference decorrelation, i.e. zero-forcing solution. Closed-form expression...
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