Báo cáo hóa học: " Review Article Bit and Power Allocation in Constrained Multicarrier Systems: The Single-User Case" potx

... providing a tutorial survey on the bit and power loading in constrained multicarrier systems and at reviewing the most popular results on the loading algorithms for the RM and MM problems. We examine ... Processing Volume 2008, Article ID 643081, 14 pages doi:10.1155/2008/643081 Review Article Bit and Power Allocation in Constrained Multicarrier Sy...

Ngày tải lên: 22/06/2014, 19:20

... 2πf n , T s is the sampling period, ζ is the damping factor, and f n is the natural frequency of the loop. In order to guarantee the stability of the loop, the damping factor ζ and the natural frequency ... respectively. The mean square error of the estimated SPO is the same in the whole used SNR range, except for small signal power in the C2 scenario. T...

Ngày tải lên: 21/06/2014, 22:20

... states in the first interval. Whereas in the other SNR regions, the assigned rate supports the worst channel state of that region. The average spectral efficiency of the system (in information bit- per-channel ... MASA both for the ASE-maximizing transmission scheme and for the ASEs obtained after optimizing the switching thresholds and power levels, respectively. 3...

Ngày tải lên: 22/06/2014, 00:20

... exploiting the receiving diversity by using either EGC or MRC, as shown in Figures 6, 7, 8 ,and9 . Without receiver combining, the BER is much worse than that in SISO-OFDM, simply because of the SINR ... Communications and Networking D n t ;m for the following reception methods: (1)demodulation without combining, (2)EGC ,and( 3)MRC. Note that the SINR for each combining scenar...

Ngày tải lên: 21/06/2014, 11:20

... mainly route strategies when rec- ognizing and navigating new spaces, and as a result, they face great difficulties in integrating the linearly gathered informa- tion into a holistic map of the ... been working on a proto- type for the blind in the Virtual Acoustic Space Project. They have developed a device which captures the form and the volume of the space in front...

Ngày tải lên: 22/06/2014, 00:20

... hand position. On the other hand, the hand position is obtained as the result of a classification at the instant of CS hand target [78]. The merging result is obtained as the combination of the ... the RMD model (recoding in the dominant modality), the auditory modality is the dominant one in speech. The visual modality predicts the spectral structure of the dom...

Ngày tải lên: 22/06/2014, 00:20

... rather than the traditional sign-magnitude form for the wavelet coefficients increases the proportion of zero bits in the bitplanes, thereby increasing coding efficiency back to equal the original ... image in Figure 1(a). In a 2D dyadic DWT, the original image is decomposed into four subbands each being one fourth the size of the original image, and the lowest-resolutio...

Ngày tải lên: 22/06/2014, 19:20

... to that of Theorem 3.3 a combined proof of Theorems 3.1 and 3.2 and is therefore omitted. By using the same methods as in the proof of Corollary 3.4, the following result is obtained. Corollary ... univalent function q.Thetheoryofdifferential subordination in is a generalization of a differential inequality in , and this theory of differential subordination was initiated by...

Ngày tải lên: 21/06/2014, 05:20

... resistance-strain sensitivity when strain hardening initiates. The change in piezoresistivity correlates the cracking in the ECC matrix and results in a nonlinear change in the material conductivity. Additional work ... measurement. The initial resistivity changes with hydration degree and increases with DC polarization. An interesting feature of the material lies in...

Ngày tải lên: 21/06/2014, 08:20

... if the HS-DSCH is active, the total transmit power is equal to the target power. Otherwise, it consist only of the DCH transmit power and the transmit power for common channels. Introducing the ... the corresponding data rates. With MaxTBS scheduling, the first and second users leave the system faster than with the other disciplines (indicated by the vertical d...

Ngày tải lên: 21/06/2014, 22:20