By Sungil Bae, Daesik Seo, Gilyoung Kang (auth.), Whie Chang (eds.)
The swift progress of the net and similar prone is altering the way in which we paintings, act, or even imagine in a fashion that a ways exceeds the prediction set through ?eld specialists now not some time past. it truly is now universal trust that the net and its numerous purposes overlaying either home equipment and software program items will play an more and more vital function in everybody’s day-by-day lives. it's also our powerful trust that the significance of the collaborative learn and improvement e?orts targeting the web between academia, undefined, and regulating executive our bodies can't be overemphasized. it's our nice excitement to carry the 1st overseas Workshop on - vanced net prone and functions (AISA) 2002. The workshop is aimed to supply a global discussion board to proportion new principles and examine leads to the world of the record of workshop themes. lower than the most subject “Advances in Int- web companies and Applications”, the workshop issues comprise QoS structure, reliability, safety, net acceleration, reverse/proxy caching schemes, content material supply community, distributed/fault-tolerant structure, storage/backup so- tions, media and streaming server, switching know-how, and residential networking. we have now solicited papers on those themes and attracted paper submissions from technically well known organizations.
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Extra resources for Advanced Internet Services and Applications: First International Workshop, AISA 2002 Seoul, Korea, August 1–2, 2002 Proceedings
On Computers. J: Virtual–channel ﬂow control. IEEE Trans. on Parallel and Distributed Systems. : Fault–tolerant routing in mesh networks. Int’l Conf. on Parallel Processing. , etc: A self–learning and tuning fuzzy logic controller based on genetic algorithms and reinforcement. int’l Journal of Intelligent System. kr Abstract. In VoIP network the primary factors aﬀecting the voice quality are codecs, delay and any associated echo, and packet loss. In this paper, E-model is used to evaluate voice quality for end-to-end voice services over IP-based network.
By solving the following problem, we can obtain the optimal weights to maximize the SINR. (1) Wl(opt) = max W =0 (1) H Ryy Wl (1) H Ruu Wl Wl Wl (1) (1) where, Ryy and Ruu are the second-order correlation matrices of the received signal subspace and the interference plus noise subspace, respectively. The solution is corresponded to the largest eigenvalue of the generalized eigenvalue problem in matrix pair (Ryy ,Ruu ). Therefore, we can obtain the maximum SINR when (1) the weight vector Wl(opt) equals the principle eigenvector of the matrix pair, which is given by (1) (1) Ryy · Wl(opt) = λmax · Ruu · Wl(opt) (8) From (7) and (8), the corresponding beamformer output for the l-th path of the interest user is (1) zˆl (1) H = Wl (1) · yl (1) (1) (1) (1) = Sˆl + Iˆl,mai + Iˆl,si + Iˆl,ni (9) where (1) Sˆl = (1) (1,1) (1) b0 T P/2βl Cll K L(k) −1 (1) Iˆl,mai = (k) P/2 k=2 × (1,k) βj Clj j=0 (k) b−1 RWk1 (k) (k) τlj (k) + b0 RW k1 τlj (k) cos ψlj L(1) −1 (1) Iˆl,si = (1) P/2 (1,1) βj Clj j=0 j =l (1) (1) b−1 RW11 τlj (1) (1) + b0 RW 11 τlj (1) cos ψlj Performance of Antenna Arrays (1) (1) Iˆl,ni = (1) with b0 (k) τl +T (1) H Wl (1) τl (1) (1) 25 (1) · n(t)g (1) (t − τl )a(t − τl ) cos[ωc t + ψl ]dt (1) being the information bit to be detected, b−1 is the preceding bit, (k) (1) (k) (k) (1) (1) H (1,k) (k) represents = Wl · V θj τlj = τj − τl and ψlj = ψj − ψl .
When a reference signal is not available, a common criterion for optimizing the weight vectors is the maximize the signal(1) (1) (1) (1) to-interference plus noise ratio(SINR). In (7), ul = Il,si + Il,mai + Il,ni is the total interference plus noise for the l-th path of the interest user. By solving the following problem, we can obtain the optimal weights to maximize the SINR. (1) Wl(opt) = max W =0 (1) H Ryy Wl (1) H Ruu Wl Wl Wl (1) (1) where, Ryy and Ruu are the second-order correlation matrices of the received signal subspace and the interference plus noise subspace, respectively.
Advanced Internet Services and Applications: First International Workshop, AISA 2002 Seoul, Korea, August 1–2, 2002 Proceedings by Sungil Bae, Daesik Seo, Gilyoung Kang (auth.), Whie Chang (eds.)