Báo cáo hóa học: " Research Article Channel Equalization in Filter Bank Based Multicarrier Modulation for Wireless " doc

... pur- suing towards the doctoral degree. His main research interests are digital signal processing algorithms for multicarrier and frequency domain equalized single-carrier modulation -based wireless ... to Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007, Article ID 49389, 18 pages doi:10.1155/2007/49389 Research Article Channel...

Ngày tải lên: 22/06/2014, 23:20

... subcarriers are ordered according to their link gains (best link gain first) and the SINR targets are reassigned in descending order. An interesting question now is to obtain the maximum possible rate ... that the same throughput is maintained; however, it is interesting to obtain an assignment which minimizes the total power. The problem of minimizing the total power for a given sum rate...

Ngày tải lên: 22/06/2014, 00:20

... interference such as intercarrier interference, cochannel interference, or multiple-access interference. This task is more difficult for a time-varying channel, since both the channel coefficients ... required for signaling the CIR length information from the receiver to the transmitter. However, for network working in time-division duplex (TDD) mode, the estimated CIR length for the...

Ngày tải lên: 22/06/2014, 22:20

... would not get any information about noncompromised nodes. 5.2. Pre venting General Attacks on WSNs. Generalattacksto WSNs mainly include eavesdropping, faking, altering, and replaying network messages ... Wang, and P. Ning, “An efficient scheme for authenticating public keys in sensor networks,” in Proceedings of the 6th ACM Internat ional Symposium on Mobile Ad Hoc Networking and Computi...

Ngày tải lên: 21/06/2014, 11:20

... Estrin, “Statistical model of lossy links in wireless sensor networks,” in Proceedings of the 4th ACM/IEEE International Symposium on Information Processing in Sensor Networks (IPSN ’05),pp. 81–88, ... Helmy, and B. Krishnamachari, “Energy-efficient forwarding strategies for geographic routing in lossy wireless sensor networks,” in Proceedings of the 2nd International Conference...

Ngày tải lên: 21/06/2014, 17:20

... can enhance information security and information-hiding capa- bilities. Particularly, if a source with constant spatial inner products (see Section 3.1) is transmitted over an uninformed link, the ... motivates us to investigate a unitary space-time coding scheme for UWB systems, coined as USTC-UWB, which can simultaneously exploit the information security and information-hiding capabilitie...

Ngày tải lên: 21/06/2014, 22:20

... users perform single-stream beamform- ing or spatial multiplexing. For the channel realization from Figure 9, only one user performs spatial multiplexing whereas all other users perform single-stream ... P ´ erez-Neira The performance of multiuser MIMO systems can be significantly increased by channel- aware scheduling and signal processing at the transmitters based on channel state i...

Ngày tải lên: 22/06/2014, 06:20

... only in [15]. In par- ticular, the solution proposed in [15] is tailored for the rate 3/4 space-time block code introduced by Tarokh in [16]and assumes a static channel with a single DOA for each ... maximum-likelihood methods remains a formidable task since it involves a search over a multidimensional domain. Therefore, we look for simpler solutions and discuss two alternativ...

Ngày tải lên: 22/06/2014, 19:20

... applications individually. In [9],a link-layer performance enhancing proxy (PEP) is proposed to cope with the impairment introduced by wireless links over the Internet stack. However, the link-layer approach ... planes. In the data plane, user- specific flows are identified and the related flow informa- tion is passed to the underlying EM. Executing the flow information management function...

Ngày tải lên: 22/06/2014, 19:20

... experimentally determined minimum number of training tokens for further training were also trained fur ther in the mixed-model recogniser. The minimum frequency for further training was 20 in the case ... tokens in the train- ing data. The syllable-model recogniser for CGN consisted of 3885 syllable models, the minimum frequency for further training being 130 tokens and resultin...

Ngày tải lên: 22/06/2014, 19:20