Time domain equalization for underwater acoustic OFDM systems with insufficient cyclic prefix

Ngày tải lên: 17/03/2014, 13:45

... article as: Tkach et al., Study of stability of time-domain features for electromyographic pattern recognition Journal of NeuroEngineering and Rehabilitation 2010, 7:21 Page 13 of 13 ... the robustness of EMG pattern classification by identifying robust sets of EMG features The experiments of this study were designed with the aim of examining the stability...

Ngày tải lên: 19/06/2014, 08:20

... Wunder et al.: Precoding and Transmitter-Side processing techniques for multiuser MIMO OFDM systems with special emphasis on the PAPR problem EURASIP Journal on Advances in Signal Processing 2011 ... combined with basis selection algorithm for PAPR reduction Similarly, in the multiuser MIMO OFDM uplink with DFT pre-coding, the joint proble...

Ngày tải lên: 20/06/2014, 22:20

... curve for a QPSK system with the conventional receiver is also provided for a baseline comparison Note that for the conventional receiver, the BER performance for an OQPSK system is the same as for ... improved FDE algorithm for an OFDMA-based multiuser MIMO system with −1 10 −2 BER 10 −3 10 −4 10 4ASK Conv QPSK Conv 4ASK Impr 10 15 20 Eb/N0 [dB] 25 30 35 Figure BER perf...

Ngày tải lên: 20/06/2014, 22:20

... band are set to be null, i.e., no information is sent [12] The presence of null subcarriers complicates the design of both the training preamble for channel estimation and pilot symbols for pilot- aided ... a candidate for pilot symbols design in OFDM systems with null subcarriers VII Conclusion We have addressed the design of optimal preamble as well a...

Ngày tải lên: 21/06/2014, 03:20

... performance of optical OFDM The nonlinear characteristic of an LED imposes limitations on the performance of indoor DOW systems when using intensity modulation with both ACOOFDM and DC-biased OFDM ... “Comparison of asymmetrically clipped optical OFDM and DC-biased optical OFDM in AWGN,” vol 12, no 5, pp 343–345 [10] H Elgala, R Mesleh, and H Haas, “A study of LED nonlinearity...

Ngày tải lên: 21/06/2014, 08:20

... Receiver performance over different channel models, for CP = and channel estimation with pilot blocks when the channel estimation is performed with the IBI cancellation, the reduction in IBI for CP ... the synchronization errors, channel estimation errors , and as well as the derivation of analytical performance bounds for the channel estimation and equalizat...

Ngày tải lên: 21/06/2014, 16:20

... timevarying CO -OFDM channels (S → R), (R → D) as well as the cascaded (S → R → D) channels We approach the channel estimation problem from a time-frequency point of view and employ the channel estimation ... almost the same estimation performance for −40 and 40 dB and obtain better results for GSR /GRD = dB as in the individual channel estimation case We show the BER per...

Ngày tải lên: 21/06/2014, 16:20

... proposal for 4G system developed in the WINNER project have been introduced A new time metric and pilot symbol design for coarse timing synchronisation, as well as new carrier and sampling frequency ... algorithms during simulations are shown in Table The algorithms for the carrier frequency and sampling frequency offsets estimation and tracking were tested for frequenc...

Ngày tải lên: 21/06/2014, 22:20

... will study scheduling problems under three fairness criteria for multiuser OFDM systems temporal fairness, utilitarian fairness, and minimum-performance guarantees These categories of fairness ... derive optimal policies for three categories of scheduling problems, each with a unique QoS /fairness requirement OPPORTUNISTIC SCHEDULING UNDER VARIOUS FAIRNESS CONSTRAINT...

Ngày tải lên: 22/06/2014, 06:20

... will study scheduling problems under three fairness criteria for multiuser OFDM systems temporal fairness, utilitarian fairness, and minimum-performance guarantees These categories of fairness ... derive optimal policies for three categories of scheduling problems, each with a unique QoS /fairness requirement OPPORTUNISTIC SCHEDULING UNDER VARIOUS FAIRNESS CONSTRAINT...

Ngày tải lên: 22/06/2014, 19:20

... timefrequency/scale analysis has also appeared as a textbook Currently, he works as an Associate Professor in mathematics and signal processing at The Netherlands Defense Academy, Den Helder, The Netherlands ... the signals In practice, this means that the method also can be applied to noisy signals with reasonable SNR values Moreover, also the type of BOC(m, n) plays a role in accura...

Ngày tải lên: 22/06/2014, 20:20

... information of CIR length for both the receiver and the transmitter to adjust the GI length adaptively Moreover, the estimated noise variance can be used for generation of the channel state information ... proposed OFDM system as in a conventional OFDM system To implement the adaptive GI length concept for broadcasting OFDM systems, a feedback channel is require...

Ngày tải lên: 22/06/2014, 22:20

... is an investigation of time domain medium access control (MAC) protocols, specifically those based on Medium Access Collision Avoidance (MACA), for Underwater Acoustic Networks (UAN) A review ... ii TIME DOMAIN MEDIUM ACCESS CONTROL PROTOCOLS FOR UNDERWATER ACOUSTIC NETWORKS SHIRAZ SHAHABUDEEN (B.Eng., NUS, M.Tele.Eng., University of Melbourne) A THES...

Ngày tải lên: 10/09/2015, 08:39

... alternative to time domain equalizers is their frequency domain counterparts Frequency domain equalizer for OFDM with insufficient CP are covered in [26; 27; 28] Among the frequency domain equalizers ... reflection point for the signal induced by the surface waves [31] Figure 2.1: Cyclic Prefix inserted at the front of an OFDM symbol in time domain Figure 2.1 sho...

Ngày tải lên: 13/10/2015, 15:56