overview of blind channel estimation 15

... BER MSE of channel estimation (dB) 15 10−2 −20 −25 10 15 SNR (dB) 20 25 M = 40 without noise variance estimation M = 200 without noise variance estimation M = 500 without noise variance estimation ... data rate = 1, (a) normalized channel estimation MSE versus SNR, (b) BER versus SNR (with noise variance estimation) MSE of channel estimation −5 −10 15 −20 −25 10 15 20 25 SNR (dB) M = 40, overall ... N/(N + L) times that of the channel symbol rate, blind channel identification based on SOS of the symbol-rate sampled channel output is possible Theoretically, as long as the channel coL so that...

Ngày tải lên: 22/06/2014, 19:20

... simulation results First, we evaluate the performance of the proposed channel estimation and detection For channel estimation, the mean Blind Channel Estimation for Space-Time Coded WCDMA 329 101 101 ... spatial diversity systems by proper antenna spacing BLIND CHANNEL ESTIMATION In this section, we propose a blind channel estimation that identifies the channel for both antenna pairs simultaneously ... unitary space-time coding schemes Blind Channel Estimation for Space-Time Coded WCDMA APPENDIX PROOF OF PROPOSITION The proof is the complex-valued version of the one in [18] √ ˜i Let A Zip SH...

Ngày tải lên: 22/06/2014, 23:20

... The Proof of Theorem 4.4.3 153 Summary The main contribution of this thesis is the development of three blind channel estimation and one blind source separation algorithms for MIMO-OFDM systems ... use blind channel estimation methods to possibly reduce the amount of training required significantly Typically, some special property of the transmitted signal is exploited for blind channel estimation ... frequency-selective MIMO channel by means of the MIMO-OFDM processing is transferred to a number of parallel flat-fading MIMO channels [6] • In Chapter 3, we present a novel subspace based blind channel estimation...

Ngày tải lên: 12/09/2015, 09:17

... Summary of the proposed channel estimation and data detection 98 4.4 Analysis of MSE of the proposed channel estimation method 99 4.4.1 MSE analysis of channel estimation for the first M1 OFDM ... variance of OFDM system capacity for the number of channel paths L = 2, 4, and 8, over the Rayleigh fading channel 163 Fig 6.5 The variance of OFDM system capacity versus the CP of an OFDM ... fading channels and Ricean fading channels have been derived The effects of SNR, the number of channel paths, power profile of fading channel, the delay of the channel on the variance have been...

Ngày tải lên: 20/11/2012, 11:28

... especially when lists of devices are being used One such situation is the output of lspci (part of the pciutils package, available with most distributions) and the layout of information in /proc/pci ... address of I/O or memory regions The PCI configuration space consists of 256 bytes for each device function, and the layout of the configuration registers is standardized Four bytes of the configuration ... device dependent Figure 15- 2 shows the layout of the device-independent configuration space Figure 15- 2 The standardized PCI configuration registers As the figure shows, some of the PCI configuration...

Ngày tải lên: 21/01/2014, 07:20

... parameters its NCC (Set of non-co -channel cells, considering its compact pattern), CC (set of co -channel cells), dc, HNCC (set of hot non-co -channel cells), HCC (set of hot co -channel cells) Algorithm: ... lender cell L The hot cell blockade is the number of hot co -channel cells of the lender that are not co -channel cells of the borrower Fig Classification of Mobile users The best lender is the cold ... hot cell needs to borrow channels until it reach the average degree of coldness dcavr When a cell becomes hot, the number of available channels is h x C, the number of channels to be borrowed...

Ngày tải lên: 22/03/2014, 11:20

... consider SISO-OFDM The BER is degraded due to the frequency offset and channel estimation errors For a fixed channel estimation variance error σΔH , a larger variance of frequency offset estimation ... P/S y1 r11 IAI cancellation e j2π( fc +ε11 ·Δ f )t CFO estimation IAI cancellation rNr Channel CFO estimation estimation Channel estimation Transmit antenna yN r CP xNt Nt ··· ... function of the second-order statistics of the channel and frequency offset estimation errors (although the interference also comprises the fourth-order statistics of the frequency offset estimation...

Ngày tải lên: 21/06/2014, 11:20

... details Channel Estimation The use of coherent demodulation implies the knowledge of the CSI-R at the receivers The initial proposals for pilotaided channel estimation schemes for MIMO-OFDM transformed ... and no channel code is used In this paper, we design and examine the performance of this scheme in the presence of a realistic and practical channel estimation algorithm and with the use of powerful ... schemes for MIMO-OFDM transformed the problem of estimating overlapping channels in the estimation of multiple single-input single-output (SISO) OFDM channels This was achieved by allocating dedicated...

Ngày tải lên: 21/06/2014, 11:20

... the impact of unknown and random LO phases on the signaling in Section 2.2 Section then motivates the usage of the MSE of the estimated two-hop channels to judge the quality of the channel estimates ... 1: Direction of measurement and required number of channel uses to estimate all first-hop and second-hop channel coefficients First-hop channel Protocol A1 Protocol A2 Protocol B1 The channel coefficients ... protocol B1, relay l can only estimate the lth row of the first-hop channel matrix and the lth column of the second-hop channel matrix We call this kind of channel knowledge “local CSI” In contrast to...

Ngày tải lên: 21/06/2014, 17:20

... and SNR = 20 dB of DPE attains the same NMSE as the second cycle of WSCC The gain in estimation error is higher for increasing SNR To evaluate the channel estimation accuracy of the proposed ... seen from (7), the data available for the estimation of channel parameters are contaminated by colored noise η with covariance matrix Rη (the estimation of Rη is further discussed in the appendix) ... the columns of G(τ) contain delayed versions of a raised cosine pulse shaping filter The inner product of two columns of G(τ), that is, g(τi ) and g(τ j ), approximates the value of the autocorrelation...

Ngày tải lên: 22/06/2014, 22:20

... MSE of the channel vector estimate of the BP algorithm can be expressed in terms of the noise covariance matrix, power of the received signal, and the number of data samples Note that if the channel ... approximation of (28) in the high SNR regime It explicitly clarifies the MSE of the estimated channel vector in terms of the environmental parameters such as the received power of the user of interest ... tribution to the value of tr(Σ(1) Ψ) becomes smaller v Effect of the eigenvectors of Σ(1) v The directions of the eigenvectors of Σ(1) with respect to the v eigenvectors of Ψ have a considerable...

Ngày tải lên: 22/06/2014, 23:20

... decoder When one of the channels is noisy, the authors in [11] (for a binary symmetric channel, BSC) and in [12] (for a BSC, AWGN and Rayleigh channel) have proposed a joint source -channel coding ... proof of the data compression theorem of Slepian and Wolf for ergodic sources (Corresp.),” IEEE Trans Inform Theory, vol 21, no 2, pp 226–228, 1975 ´ [3] S Shamai and S Verdu, “Capacity of channels ... of Bilbao (ETSI), Spain, where he obtained his M.S degree in 2003 As a Member of the Signal and Communication Group at the Department of Electronics and Telecommunications of the University of...

Ngày tải lên: 23/06/2014, 00:20

... distribution of the channel estimation error is exploited to compensate for the imperfection of channel estimation For simplicity, we consider only the IO MUD (C-IO MUD) 4.2.1 ML channel estimation ... Bit error rate of C-IO MUD as a function of channel estimation error variance 0.02 0.05 0.25 Convolution Perfect CSI Figure 4: Bit error rate of MMSE MUD as a function of channel estimation error ... Therefore, it is of interest to analyze the performance of MUD with imperfect channel estimates For linear MUD, the impact of channel estimation error on detection has been studied in [13, 14, 15] using...

Ngày tải lên: 23/06/2014, 00:20

... Capacity of MIMO Systems Capacity Analysis of MIMO Communication System 13 Mobile Radio Channels and MMSE Channel Estimation 17 2.2.1 Rayleigh Fading Channel ... 19 2.4 Simulated p.d.f of 1BTW channel model 20 2.5 Simulated correlation functions of 1BTW channel model 21 2.6 Simulated p.d.f of 3BTW channel model ... performance of Alamouti’s STBC under BTW channel 54 3.5 Theoretical BEP performance of Alamouti’s STBC under 1BTW channel 55 vii LIST OF FIGURES 3.6 Theoretical BEP floor under BTW channel ...

Ngày tải lên: 16/09/2015, 08:31

... Different Number of Paths 70 4.4 Chapter PIC-based DEML Channel Estimation 5.1 PIC-based Channel Estimation Model 72 75 Contents iv 5.2 Statistical Accuracy of the Estimator ... round of low-complexity receiver for broadband transmission However, the performance of RAKE is very much dependent on the quality of its channel estimates To attain more accurate channel estimation ... relative rate of change of the transmitted signal and the channel characteristics as mentioned above, a channel may be fast fading or slow fading In a fast fading channel, the channel impulse...

Ngày tải lên: 09/10/2015, 11:18

... surface profile with conditions of Exp-2…………….79 Figure 6.11 Steady water surface profile with conditions of Exp-5…………….80 Figure 6.12 Steady water surface profile with conditions of Exp-6…………….80 ... plot of water surface in 2D simulation of Exp-1 …………….95 Figure 6.35 Carpet plot of water surface in 2D simulation of Exp-2…………… 95 Figure 6.36 Carpet plot of water surface in 2D simulation of ... plot of water surface in 2D simulation of Exp-4…………… 96 Figure 6.38 Carpet plot of water surface in 2D simulation of Exp-5…………… 97 Figure 6.39 Carpet plot of water surface in 2D simulation of Exp-6……………...

Ngày tải lên: 06/11/2012, 10:35

... the important role of tourism in Ho Chi Minh City as well as it affirms the development of “the Vietnam’s tourism of the new millennium.” Advantages of tourism development in Vietnam ... regions of the world, the Vietnamese tourism industry is entering a strong development period Over the past 15 years, the number of tourists has increased by 20% each year on average The number of ... border gates for those who stay in Vietnam up to a maximum of 15 days.” Infrastructure is one of the most important factors in the growth of the tourism industry in the recent period, the tourism...

Ngày tải lên: 05/04/2013, 11:29