... book.150 FREQUENCY- DOMAIN ANALYSIS xlabel(’Normalized frequency )subplot(1,2,2)plot(w,HdB);gridtitle(’Magnitude in dB of the frequency response’)ylabel(’Magnitude in dB’)xlabel(’Normalized frequency )figure(2)subplot(1,2,1)plot(w,ph);gridtitle(’Phase ... 2πk)120 FREQUENCY- DOMAIN ANALYSIS There is some ambiguity in the published literature regarding the definition ofwhat is called the Nyquist frequency. Most of the books define half the sampling frequency ... 3.15,respectively.148 FREQUENCY- DOMAIN ANALYSIS Suppose that we are given the transfer function of an IIR filter:H(z−1) =Mk=0bkz−k1 +Nk=1akz−kThere are two equivalent approaches to find the frequency...
... 3)CHAPTER 2Time -Domain Analysis and z Transform2.1 A LINEAR, TIME-INVARIANT SYSTEMThe purpose of analysis of a discrete-time system is to find the output in eitherthe time or frequencydomain of ... and model it byequations in the z domain, instead of the equivalent model given by equations(2.1) in the time domain. This example is chosen to illustrate the analysis of adiscrete-time system ... natural frequency equal to (0.2) and theterm −0.088(0.1)nu(n) with the natural frequency of (0.1), while the zero stateresponse y0s(n) also contains the term 0.5(0.2)nu(n) with the natural frequency of(0.2)....
... the frequency domain. Filtering in frequency domain Original signalLow-pass filteredHigh-pass filteredfunction [U, V] = dftuv(M, N)function [U, V] = dftuv(M, N)%DFTUV Computes meshgrid frequency ... …'FontSize',14) Obtain FrequencyDomain Filters from Spatial FiltersThe syntax: H = freqz2 (h, R, c)Where h is a 2-D spatial filter and H is the corresponding 2-D frequencydomain filter. Consider ... 0.0000Filtering in the frequency domain The convolution theorem:Linear spatial convolution is by convolving f(x,y) andh(x,y). The same result is obtained in the frequencydomain by multiplying...
... purposes)Regression plots for low frequency common drive time versus frequencydomain techniquesFigure 4Regression plots for low frequency common drive time versus frequencydomain techniques. Regression ... between the time and frequency domain estimates.The use of a short duration window in the time domain method results in the inclusion of multiple frequencies inthe time domain correlation estimation ... recordings.One is a frequencydomain method and uses the coherence function to determine the degree oflinear correlation between each frequency component of the signals. The other is a time domain method...
... in the frequency domain. IEEE Trans Commun. 53(1), 110–121 (1995)5. N Benvenuto, S Tomasin, On the comparison between OFDM and singlecarrier modulation with a DFE using a frequencydomain feedforward ... structure for orthogonal frequency division multiple access-baseduplink multiuser multiple-input multiple-output systems. The numerical results show that the proposed frequency- domain equalization ... multiple-input multiple-output (MIMO), frequency- domain equalization1 IntroductionMultiple-input multiple-output (MIMO) techniques incombination with orthogonal frequency division multipleaccess...
... in frequency- selectivechannels. Some STBC schemes to deal with frequency selectiv ity have been proposed for orthogonal frequency division multiplexing (OFDM) [6], single-carrier (SC)time -domain ... detectionover frequency- selective channels due to intersymbolinterference (ISI). In [11], adaptive algorithms to miti-gate ISI effects for frequencydomain equalization (FDE)in frequency- selective ... transmissionover frequency- selective fading channels. IEEE Trans Inf Theory 49(1),164–179 (2003). doi:10.1109/TIT.2002.80615822. S Zhou, G Giannakis, Space-time coding with maximum diversity gains over frequency- selective...
... sin-gle carrier with frequencydomain equalization systems havebeen proposed in optical communication as an alternativeto OFDM [12, 13]. In [12], single carrier frequency domain EURASIP Journal ... al., Frequency- domain equalisation for optical transmission systems,” ElectronicsLetters, vol. 44, no. 14, pp. 870–872, 2008.[13] C C. Hsieh and D S. Shiu, “Single carrier modulation with frequency ... vectorSI=SI+−SI−,SQ=SQ+−SQ−.(29)The frequencydomain transmitted symbols S are thenestimated asS =SI+ jSQ, (30)where j=√−1. We then obtain the time domain signal bythe taking an...
... time -domain equalizationschemes have been proposed in [9, 10].Recently, we proposed a near ML-based reduced com-plexity frequency- domain equalization scheme, which iscalled frequency- domain ... becomes extremely high in a severely frequency- selective channel [2]. Therefore, several suboptimal lineardetection schemes, such as time -domain and frequency- domain linear equalization schemes, ... and cost analysis, ” IEEE Transactions on Communica-tions, vol. 32, no. 2, pp. 169–176, 1984.[17] K. Takeda, H. Tomeba, and F. Adachi, “Joint Tomlinson-Harashima precoding and frequency- domain...
... isrequired. Another FFT operation is required for the transfor-mation of the time -domain IBI term into frequency- domain. Notice that exact computation of the tanh(·)functioncanbe costly, however ... Blanchi, Frequencydomain detectors forultra-wideband indoor communications,” IEEE Transactionson Wireless Communications, vol. 5, no. 10, pp. 2654–2658,2006.[8] S. Morosi and T. Bianchi, Frequency ... Bhargava, Frequency- domain turboequalization and multiuser detection for DS-UWB systems,”IEEE Transactions on Wireless Communications,vol.7,no.9,pp. 3280–3284, 2008.[11] Y. Wang and X. Dong, Frequency- domain...