Báo cáo hóa học: "Research Article Feedback Quantization for Linear Precoded Spatial Multiplexing" ppt

... bitwords (for a nondedicated feedback link), with a feedback rate of log 2 N bits per channel use, or N increasing-length NPF bitwords (for a dedicated feedback link), with an average feedback ... type of feedback channel, we obtain a different solution for (23). For a nondedicated feedback link, or in other words for PF bitwords, the solution of (23) is given by the Huffm...

Ngày tải lên: 21/06/2014, 22:20

... only, which is equivalent to performing energy detection. Detector performance is maximized for asmallN b value, which implies that performance can be maximized for a limited hardware complexity. ... the cyclostationary detector performs according to N b . For this purpose, the probability of detection is computed as a function of the SNR under AWGN conditions for various N b values....

Ngày tải lên: 21/06/2014, 11:20

... is particularly important in studying the performance of self- organizing self-configuring networks. For the interference scenario described in the system model, the path loss for the desired path and the path ... flexibility of choosing different distributions for the desired link and interfering link, such as the Rayleigh for the channel envelope of the desired link, and Rician for t...

Ngày tải lên: 21/06/2014, 22:20

... the perspective for the introduction of advanced solutions for the adaptation to satellite links, as described in Section 3. The FEC technique adopted by LTE for processing the information data ... ower reduct ion for multicarrier modulation, Ph.D. dissertation, Stanford University, Stanford, Calif, USA, 2000. [12] B. S. Krongold and D. L. Jones, “An active-set approach for OFDM PAR...

Ngày tải lên: 21/06/2014, 23:20

... Corporation EURASIP Journal on Advances in Signal Processing Volume 2008, Article ID 457307, 12 pages doi:10.1155/2008/457307 Research Article Code Design for Multihop Wireless Relay Networks Fr ´ ed ´ erique Oggier ... nodes are used for one hop. We address the problem of code design when relay nodes may be used for more than one hop. We consider as a protocol a more elaborated ver...

Ngày tải lên: 22/06/2014, 19:20

... decisions that can affect its performance sig- nificantly. Wavelet transform is more forgiving than other methods when the form of the signal is not clearly known. It is ideal for handling phenomena with ... accurately. For oscillatory tran- sient, its predominant frequency needs to be derived before computing its magnitude. DFT is often used even though these waveforms are not periodic and...

Ngày tải lên: 22/06/2014, 20:20

... in compar- ison to other established distortion synthesis techniques. A closed-form formula for the FBAM output waveform was presented and its corresponding waveshaping transfer function discussed. ... coincide with the harmonic series of the fundamental, each formant is modeled using the double-carrier formula of (32). For example, formant f 3 is modeled using harmonic ordinals k LO = in...

Ngày tải lên: 21/06/2014, 07:20

... whereas for FRGCt, DROBA + Model 1/2/3 do not outperform LC + Model 2. Additionally, DROBA + Model 4 outperforms MC+Model 1 and LC+Model 1, as well as MC + Model 2, except for FVC2000. Unfortunately, ... assignment {b ∗ i }, indicating the number of quantization bits for every single feature. The final binary string for a genuine user is the concatenation of the quantization and co...

Ngày tải lên: 21/06/2014, 20:20

... the result for the limited feedback system in [7], for the ZF system with both delay and channel quantization, we can get the following corollary for the condition to achieve the full spatial multiplexing ... instantaneous channel information. Therefore, it is suitable for a system that has a constraint on the total feedback bits and only allows a small number of users to send...

Ngày tải lên: 21/06/2014, 20:20

... 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 ... OFDM chunk processing. [7, 39]. We use (n T −1)q bits for the power quantization and the remaining bits for beamformer quantization. Consider, for example, the case in which t...

Ngày tải lên: 22/06/2014, 06:20