Báo cáo hóa học: " Research Article Experimental Evaluation of Adaptive Modulation and Coding in MIMO WiMAX with Limited " docx

... transmis- sion, MISO /MIMO transmission with Alamouti space-time coding, and MIMO transmission with spatial multiplexing. In the case of a single transmit antenna and for Alamouti mode, a single data stream ... runs of low reliable bits at the decoder input. The interleaved bits are mapped adaptively to a symbol alphabet. The coding, interleaving, and symbol mapping are t...

Ngày tải lên: 22/06/2014, 06:20

... performance of multiple mechanisms, and the in uence and performance penalty introduced in the network, with the incremental inclusion of new functionalities. The performance results obtained in the ... of the nature of ad hoc networks, rout- ing protocols should be highly dynamic and robust. Ad hoc routing protocols are often classified regarding its method of finding a...

Ngày tải lên: 22/06/2014, 19:20

... space-time coding [1–4]. Recently, with the increasing interestin ad hoc networks, researchers have been looking for methods to exploit spatial diversity using the antennas of different users in the ... (S k −S l ) ∗ (S k −S l )HR −1 W H ∗ . (18) Proof. The proof is omitted since it is the same as the proof of Theorem 1 in [5]. As both H and R W are known at the receiver, sphere...

Ngày tải lên: 22/06/2014, 19:20

... Spain, June 2009. [12] S. Andreev, Z. Saffer, A. Turlikov, and A. Vinel, “Upper bound on overall delay in wireless broadband networks with non real-time traffic,” in Proceedings of the 17th International Conference ... schemes in IEEE 802.16. In Section 3, we provide the analytical model including the details of the capacity allocation and the uplink scheduling. The analysis o...

Ngày tải lên: 21/06/2014, 05:20

... power and large bandwidth, currently unavail- able using conventional narrowband systems. In this paper, both line -of- sight (LOS) and non-line -of- sight (NLOS) channels with various TX and RX ... Hari, K. Ohno, and T. Ikegami, “Experiments on shadow effects of body and effective paths for UWB transmission in BAN,” in Proceedings of the International Symposium on Communi...

Ngày tải lên: 21/06/2014, 07:20

... a frame with training symbols only, a frame which is captured by the relay and destination and used to estimate the best sampling phase of the source signal. After receiving the training signal ... using the Q( √ γ) formula, and finally calculating the average. In the case of two-branch receive diversity in Rayleigh fading, with maximum ratio combining (MRC), the SNR of the...

Ngày tải lên: 21/06/2014, 20:20

... in signal queues and the utilization of PEs. If the number of tokens in the incoming channel of a task is increasing it is usually an indication of that task being the bottleneck in a chain of ... decomposed into data processing, scheduling, and medium access tasks. Then examining if the timing requirement of a single data transmission is met requires examining the respo...

Ngày tải lên: 21/06/2014, 20:20

... Evaluation of WiMAX Broadband from High Altitude Platform Cellular System and Terrestrial Coexistence Capability Z. Yang, A. Mohammed, and T. Hult School of Engineering, Blekinge Institute of Technology, ... channel resources in each cell of the system. 6. CONCLUSIONS In this paper, we have shown the performance of both down- link and uplink WiMAX broadband standard...

Ngày tải lên: 21/06/2014, 23:20

... example of a HUT system with an adaptive beamforming device. The system consists of receiving and transmitting beamformers. The number of elements, M, determines the antenna gain of the HUT. The incident ... showing the interference analysis results using various conventional interference mitigation schemes including FSSD and FSPC in Section 4, new results are introduced usi...

Ngày tải lên: 21/06/2014, 23:20