Báo cáo hóa học: "Research Article Diversity Techniques for Single-Carrier Packet Retransmissions over Frequency-Selective Channels" docx

... and Networking Volume 2009, Article ID 406028, 10 pages doi:10.1155/2009/406028 Research Article Diversity Techniques for Single-Carrier Packet Retransmissions over Frequency-Selective Channels Abdel-Nasser ... integrated packet combining for both diversity schemes with the purpose of showing the performance-complexity tradeoff achieved by these diversity technique...

Ngày tải lên: 21/06/2014, 23:20

... transmit beamforming for single-carrier frequency-division multiple access (SC-FDMA) transmission over frequency-selective multiple-input multiple-output (MIMO) channels. The beamforming filters ... beamformer at equal or even lower transmit power. Therefore, eigenbeamforming is optimum and considered further in the following. 5.2. MSE Minimizing Po wer Allocation for Eigenbeamformin...

Ngày tải lên: 21/06/2014, 08:20

... 7. Notation:( ·) H is reserved for the matrix Hermitian, (·) −1 for the matrix inverse, ( ·) T for the matrix (vector) transpose, ( ·) ∗ for the complex conjugate, for the Kronecker product, tr {·} for the trace ... the multipath MIMO channel. For Rician frequency-selective fading channels, the ele- ments of the matrix H l, for all l ∈ [0, L], are defined similar to [45, 46] i...

Ngày tải lên: 21/06/2014, 11:20

... This storage overhead is small. For example, when M = 10 and each LQI entry is represented by 4 bytes, the storage overhead is about 440 bytes. This storage overhead is acceptable for most wireless ... lower communication overhead than the traditional schemes. Besides the communication overhead, the proposed scheme introduces some additional storage overhead. The storage overhead comes fr...

Ngày tải lên: 21/06/2014, 22:20

... 0.01 W, the performances of all SCFDE schemes are almost the same due to their lower PAPR. For an input signal power of 1 W for QPSK and 0.1 W for 16 QAM and 64 QAM, DQO-SCFDE performs better than ... Signal Processing Volume 2011, Article ID 393768, 13 pages doi:10.1155/2011/393768 Research Article Novel Techniques of Single-Carrier Frequency-Domain Equalization for Optical W...

Ngày tải lên: 21/06/2014, 08:20

... channel noise power. 3. Diversity Combining in Linear SIMO Channels For linear SIMO channels, several diversity combining techniques are available to achieve the antenna diversity [10], for example, maximal ... certain mul- tipath diversity in frequency-selective fading channels [9], we focus on antenna diversity in this paper. In addition, the SER performance for clipping...

Ngày tải lên: 21/06/2014, 18:20

... band. Moreover, the measured S 21 always remains below −18 dB in the whole UMTS band. All these values seem to be very sat- isfactory for diversity purposes. 3. COMPARISON OF THE DIVERSITY PERFORMANCE 3.1. ... antennas operating in a uniform multipath environ- ment, low correlation is not very difficult to achieve. 3.4. Apparent diversity gain and actual diversity gain The concept of...

Ngày tải lên: 21/06/2014, 22:20

... Luca Ferrarini et al. 3 platform-independent specification of a software system, platform specification, and transformation from platform- independent models to a platform specific models. It in- cludes ... ask for high customization and precise configurations. Target platforms for control applications are nonhomo- geneous and their management is extremely demanding, rapidly becoming a nightm...

Ngày tải lên: 22/06/2014, 05:20

... there exists explicit formula for the distribution of the minimum eigenvalue of a Wishart matrix, we could not find nonasymptotic formula for the maximum eigenvalue. Therefore, we calculate the ... been looking for methods to exploit spatial diversity using the antennas of different users in the network [5– 24]. Many cooperative strategies are proposed, for example, amplify-and-forwar...

Ngày tải lên: 22/06/2014, 19:20

... graph. Therefore, the resource allocation for these topologies is identical. In other words, the resource allocation in overlap- ping MBS Zones is to deal with the coloring problem for Nonisomorphic ... reestablishing an MBS connection [1]. For MBS Zone containing multiple BSs, it can be operated in either macro -diversity or non-macro -diversity operating mode. In macro -diversity o...

Ngày tải lên: 21/06/2014, 05:20