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— This paper focuses on energy-efficient packet transmission with individual packet delay constraints. The optimal offline scheduler (vis-` a-vis total transmission energy), assuming information of all packet arrivals before scheduling, was developed by Zafer, et al. (2005) and Chen et al. (2006). This paper shows that when packet inter-arrival times are… (More)

2609 where H is the natural entropy function and R = k=n is the rate. Since we are dealing with the asymptotical case, we normalize by setting i = n!, and we define the function f (!; R; q) by A !n = e nf(!; R; q) : From Lemma 2, we get f (!; R; q) = H(!) + ! ln(q 0 1) 0 (1 0 R) ln q: (6) Note that, for a given A i , there are two solutions for i. Setting A… (More)

— This paper focuses on energy-efficient packet transmission with individual packet delay constraints over a fading channel. The problem of optimal offline scheduling (vis-` a-vis total transmission energy), assuming information of all packet arrivals and channel states before scheduling, is formulated as a convex optimization problem with linear… (More)

Two previously proposed training sequence optimization techniques for channel estimation are compared. One method is based on a frequency-domain based channel estimation method (FD) and the other is based on a time-domain channel estimation technique (TD). The FD method produces a lower complexity search strategy but does not always result in the optimal… (More)

Blind adaptive minimum mean-squared errors (MMSE) receivers for multiuser direct-sequence code-division multiple access (DS-CDMA) systems that assume knowledge of the steering vector, i.e., the cross-correlation between the desired output and the input signal, are known for their robustness against channel fading as they do not attempt to explicitly track… (More)