Báo cáo hóa học: " Space-Time Chip Equalization for Maximum Diversity Space-Time Block Coded DS-CDMA Downlink " doc

... 5-6 dB. The curve for a QPSK system with the conventional receiver is also provided for a baseline com- parison. Note that for the conventional receiver, th e BER performance for an OQPSK system ... Conv. 16QAM Conv. 16ASK Impr. Figure 5 BER performance for the uplink of OFDMA system (K = n R = 2) for the conventional FDE and the improved FDE for systems with high-order signal c...

Ngày tải lên: 20/06/2014, 22:20

... compared some signed measure of execution error (here, maximum lateral deviation) in movements where force is turned on (force trials) and where force is turned off (catch trials). If adaptation had ... the manipulandum - which did not generate forces - and with the task; (ii) Baseline 1 (5 epochs, i.e. 15 movements). The robot did not generate forces. For each target, we identi- fied the...

Ngày tải lên: 19/06/2014, 08:20

... function 1+  n|a n |K 2μ +μ|a n−μ |K μ−1 n|a n |K μ−1 +μ|a n−μ |  z for |z| <1. Hence, by a property of subordination (for reference see [[ 9], p. 36, Theo- rem 1.6.17] or [[10], p. 454] or [11]), we have for each δ >0 and 0 ≤ θ ... z n−1 Q  ( 1 ¯ z ) . (13) This implies | P  ( z ) | = |nQ ( z ) − zQ  ( z ) | for |z| =1 . (14) Let m = Min |z|=K |P (z)|, so that m ≤ |P (z)|...

Ngày tải lên: 21/06/2014, 00:20

... closely match for both frequency reuse patterns. We also note that simulated and approximated curves are closer to one another for FR3 than they are for FR1. As explained before for the single-interferer ... to some form of intercell interference. Providing statistical models of the interference power is essential to allow for an accurate evaluation of net- work performances without...

Ngày tải lên: 21/06/2014, 00:20

... problematic. For example, during the 9/11 attacks, police issued * Correspondence: alfrag@ics.forth.gr 1 Institute of Computer Science of the Foundation for Research and Technology-Hellas (FORTH), ... network for supporting emergency operations is proposed. This is formed by mesh clients placed on balloons, forming a mesh network in the sky. Communication through the balloons is perform...

Ngày tải lên: 21/06/2014, 03:20

... et al. 15 triple. To see this observe first that, by Definition 6.1, α p (k) ≤ ω p (g)foranyp ∈ U.There- fore, for any p ∈ U and any positive ε<1wehave α p  (1 − ε)k  = (1 − ε)α p (k) <ω p (g) ... choice of an orientation α(x)ofh(x)foreachx ∈ X, where “continuous” means that for any x ∈ X there exists A ∈ α(x) which is a positive corrector of h(x  )foranyx  in a neighborhood of x....

Ngày tải lên: 22/06/2014, 22:20

... real- izations for the uncoded performance and over 100 channels for the coded performance. For each channel, at least 10 bit errors were counted for each E b /N 0 value, where E b /N 0 stands for the ... performance analysis, over flat-fading channels, that confirms that our proposed spatial-mode selection significantly outperforms state-of-the-ar t joint Tx/Rx MMSE designs for bo...

Ngày tải lên: 23/06/2014, 01:20

... single-antenna DS-CDMA downlink scheme, resulting into so-called space-time block coded DS-CDMA downlink schemes. As an example, we mention the space-time block coded DS-CDMA downlink schemes ... Pro- cessing Magazine. Space-Time Chip Equalization 747 4. SIMULATION RESULTS In this section, we compare the proposed space-time chip equalizer for the proposed...

Ngày tải lên: 23/06/2014, 01:20

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Ngày tải lên: 21/06/2014, 17:20

... [12, 13]. However, for the transmission model considered here, a Volterra modelization happens to be only suitable for the task of identification and not for a direct equalization. For instance, a ... sequence for updating the equalizer parameters. Blind equalization methods also exist but they require a Volterra modelization of the system which is not suited for equalization...

Ngày tải lên: 23/06/2014, 01:20