Báo cáo hóa học: " Frequency domain equalization space-time block-coded CDMA transmission system" pdf

... Fre- quency -domain equalization (FDE) is commonly used for OFDMA. This includes frequency domain linear equaliza- tion (FD-LE) [4], decision feedback equalization (DFE) [5,6], and the more recent turbo equalization ... for orthogonal frequency division multiple access-based uplink multiuser multiple-input multiple-output systems. The numerical results show that the proposed fre...

Ngày tải lên: 20/06/2014, 22:20

... Open Access Frequency domain equalization space-time block-coded CDMA transmission system César Augusto Medina * and Raimundo Sampaio-Neto Abstract In this work we propose a space-time block-coded ... MC -CDMA. IEEE Trans Signal Process. 55(10), 4737–4751 (2007) doi:10.1186/1687-1499-2011-80 Cite this article as: Medina and Sampaio-Neto: Frequency domain equalization...

Ngày tải lên: 21/06/2014, 00:20

... determines the value of the bit received by the th user. 4.2. Frequency domain detection Channel equalization in the frequency domain [8]isapos- sible solution to the IPI which is caused by ... have to be taken into account. Frequency domain equalization (FDE) [8], proposed and studied for a single-carrier single-user environment, is sim- ply the frequency domain analog o...

Ngày tải lên: 22/06/2014, 22:20

... the frequency- domain approach. Frequency- domain BSS is influenced by the circularity of the discrete -frequency representation. This causes a problem when we convert separation matrices in the frequency ... (2) Figure 1 shows the flow of BSS in the frequency domain. Each convolutive mixture in the time domain is converted into multiple instantaneous mixtures in the frequency...

Ngày tải lên: 22/06/2014, 23:20

... vari- ation of the channel model (2), we derive the frequency- domain representation of f opt (k), which represents the time- frequency dual of the time -domain representation (13)and allows us to show ... relation (26) shows that the equivalent frequ- ency -domain representation of f opt (k) turns out to be the minimal norm solution of the frequency- domain LTV-ZF condition (21), t...

Ngày tải lên: 22/06/2014, 23:20

... alterations [22]. Among these variants, 19 variant were absent in the 449 Han Chinese controls, while the frequency of other var- iants ranged from 0.2% (13 variants such as 789T > C) to 22.7% (709G ... with aminoglycoside ototoxicity. Mitochondrion 2010. doi:10.1186/1479-5876-9-4 Cite this article as: Shen et al.: Frequency and spectrum of mitochondrial 12S rRNA variants in 440 Han Ch...

Ngày tải lên: 18/06/2014, 16:20

... well as the transmission of drug-resistant HIV strains would aid design of optimal drug regimens and clinical manage- ment. Our study was designed to obtain preliminary data on the frequency of ... offered to HIV-infected patients and pregnant women to stop vertical transmission. [17] The data obtained from our study revealed a low frequency of codon 215 mutations (1.67%) compared with...

Ngày tải lên: 20/06/2014, 08:20

... handoff i s divided into the intra -domain and inter -domain handoff, Thus, μ is com- posed of μ G and μ L ,whereμ G and μ L mean the rate of inter -domain and intra -domain handoff for an MR, respectively. ... can find better routing path to achieve the intra -domain route optimization. 3.3 Inter -domain routing Figure 5 shows the flow chart of the inter -domain route optimization pro...

Ngày tải lên: 21/06/2014, 00:20

... depicts the effect of nonlocal parameter on the frequency shift of the cantilever sensor with attached mass for c/L = 1. It can be seen that the frequency shift of the sensor increases with increasing ... increases the frequency shift. The trend is obvious when the attached mass is small compared with that of the sensor. In addition, the location of attached mass can influence on the cha...

Ngày tải lên: 21/06/2014, 07:20

... 1200 Frequency (MHz) MA7 @RF MA8 @RF MA9 @RF Frequency response of the temporal MA filters Figure 3: Transfer function of the temporal MA operation at RF rate. in the voltage domain. Its frequency ... 4. The following equations describe the time- domain signal processing: (3)forw i ,(4)and(5)forx j ,(9) for y k ,and(10)forz k . The first aliasing frequency (at f 0 /N = 300 MHz) is pa...

Ngày tải lên: 22/06/2014, 22:20