Báo cáo hóa học: " Low Complexity Turbo Equalization for High Data Rate Wireless Communications" doc

... approximate implementation offers very good performance at linear complexity. Thus, the lat- ter low complexity equalization algorithm is suitable for high data- rate wireless communication systems with ... Figures 3 and 4 demonstrate the performance of various receivers perform- ing turbo equalization for the aforementioned channels. The cases shown correspond to (a) con...

Ngày tải lên: 22/06/2014, 22:20

... T g (T s  T g ) to achieve an ultra- high data rate. It can be found that the waveform duration of s(t)isT g + T ω , a nd thus the transmitted waveform for one symbol overlaps that of other ... of the channel [4] will increase receiver complexity which limits both detection performance and data rate under the condition that receivers with high complexity are not preferred in...

Ngày tải lên: 21/06/2014, 05:20

... performance for the MIMO systems with a sma ll number of antennas. In the sys- tems with a large number of antennas, we can achieve even higher complexity reduction without significant performance ... results Monte Carlo simulations are performed for a wireless system with multiple antennas to evaluate the perfor- mance of the proposed selection criterion. For the sake of simplicity...

Ngày tải lên: 21/06/2014, 03:20

... banded, L 2 is lower triangular and banded, and D 2 is diagonal, it turns out that the banded MMSE-BDFE is characterized by a very low complexity, as detailed in the following. 4.3.2. Complexity ... and G. Leus, “Simple equalization of time-varying channels for OFDM,” IEEE Communications Let- ters, vol. 9, no. 7, pp. 619–621, 2005. [10] P. Schniter, Low- complexity equalization o...

Ngày tải lên: 22/06/2014, 23:20

... subset Ω. For this column, each of q = 2 p formed test sequences has to perform one syndrome decoding, that is, the decoding complexity of one column for this procedure is q × m times the complexity ... and in revised form 30 April 2003 The goal of this paper is to reduce the decoding complexity of space-time block turbo- coded system with low performance degra- dation. Two block...

Ngày tải lên: 23/06/2014, 01:20

... Considering the fairness level of the system, the data rates are distributed quite uniformly among M selected users for RBF, whereas the data rates are weighted too much on the first and second ... and sends the feed- forward signal through the forward channels. The feed-forward signal contains information 4 using X and Y . Theorem 1: (Largest order statistic among CQIs for Q a candida...

Ngày tải lên: 21/06/2014, 17:20

... corresponding CRLB for QPSK is smaller than that for 16-QAM. Figure 8 shows the BER performance of the proposed turbo scheme with different numbers of iterations. For reference, the ideal BER performance ... IEEE standard 802.11a [15]. QPSK is employed for data OFDM symbols, each has 52 data tones. Note that in [15], 4 out of 52 data tones are reserved for known pilot tones t...

Ngày tải lên: 21/06/2014, 23:20

... and A. R. Calderbank, “Space-time codes for high data rate wireless communication: perfor- mance criterion and code construction,” IEEE Transactions on Information Theory, vol. 44, no. 2, pp. 744–765, ... but they form the basis for practical low- complexity adaptive implementations, which can be derived in a similar fashion as done in [20, 21]. For the sake of simplicity, we...

Ngày tải lên: 23/06/2014, 01:20

... is essential for the formation of intracellular mature virions (IMV) and plays a role in vir- ion morphogenesis [1-4]. In the absence of L1R, only immature virion particles are formed and proteolytic cleavage ... viral yield or in some way inter- rupt or slow the viral life cycle. This did not occur, most likely because three proteins, essential for disulphide bond formation in L1R, are e...

Ngày tải lên: 20/06/2014, 04:20