mmse suppression combined with interference cancellation

... Decomposition Interference Suppression Combined with Interference Cancellation 6.3.2 Interference Minimum Mean Square Error (MMSE) Suppression Combined with Interference Cancellation ... based on combined interference suppression and successive cancellation V-BLAST example, nT = 4, nR = 4, with QR decomposition, MMSE interference suppression and MMSE interference ... MMSE interference suppression/ successive cancellation Block diagrams of iterative LSTC receivers; (a) HLST with a single decoder; (b) HLST with separate decoders;...

Ngày tải lên: 26/10/2014, 14:30

... layered space-time IC interference cancellation IS interference suppression LMDS Local Multipoint Distribution System MIMO multi-input multi-output ML maximum likelihood MMSE minimum mean square ... interfere with each other, multiuser detection (MUD) algorithms are naturally applied at the receiver [19], among which the interference suppression (IS) and successive interference cancellation ... associated with a certain transmit antenna Unlike DLST, the vertical arrangement of the layers enables detection and coding with lower complexity, but with different performances for different layers With...

Ngày tải lên: 14/09/2015, 12:11

... 20 25 SNR (dB) Separated training with PN scrambling Separated training with secure scrambling Nonseparated training with PN scrambling Nonseparated training with secure scrambling Figure 5: BER ... message blocks with the same size as K, d is the shift between the successive inputs to the AES engine If the input to the ith encryption block is st+id , st+1+id , , st+127+id with initial ... complexity and system performance with that of the conventional scrambling process It is also shown that by scrambling the training sequence and the message sequence separately with two independent scrambling...

Ngày tải lên: 22/06/2014, 19:20

... log 10 (Eb /N0 ) for a WSN with K = 30 sensors using DSTBCs with N = 1, 2, and Considered cases: error-free local sensor decisions (σ = 0, d = 0), noisy sensor decisions without censoring (σ = 1/4, ... sensor decisions without censoring (σ = 1/4, d = 0), and noisy sensor decisions with censoring (σ = 1/4, d = dopt ), where dopt denotes the optimum decision/censoring threshold found with the gradient ... = 2, δ = N = 4, δ = (b) Figure 2: d and Pe versus iteration number i for a WSN with K = 30 sensors using DSTBCs with N = 1, 2, and 10 log 10 (Eb /N0 ) = 15 dB, σ = 1/4 column of H8 For the set...

Ngày tải lên: 22/06/2014, 19:20

... TR-STBC with 16-state TCM TR-STBC with 64-state TCM Outage probability Figure 2: Comparison with previously proposed STC schemes (2Tx-antenna systems over 2-path ISI channel) in agreement with standard ... is denoted by “MFB,” and the MMSE- DFE Gaussian approximation is denoted by MMSE- DFE-GA.” 5.1 Comparison with other schemes Figure compares the TCM-TR-STBC scheme with previously proposed schemes ... by signals with frequency-flat power spectral density is given by [32] IG (19) where E[|w[ j]|2 ] = 1, and E β is the signal-to-interferenceplus-noise ratio (SINR) at the output of the MMSE- DFE...

Ngày tải lên: 23/06/2014, 00:20

... degree with Specialization in Computing Science from the University of Alberta in Edmonton, Alberta, Canada Qing has a Masters of Science degree with Distinction in Computer Engineering, with focus ... springs to life with unabashed liveliness Automobiles equipped with in-car navigation systems transport people to destinations safely and efficiently Listening to favorite tunes with anytime-anywhere ... that with the EEPROM device, memory content of a single byte can be selectively This document is created with the unregistered version of CHM2PDF Pilot erased and reprogrammed Therefore, with...

Ngày tải lên: 08/03/2016, 11:37

... antenna, as BER curves for the 2D OFDM-CDMA with users coincides with our proposed system but with users Therefore, our proposed scheme has twice the throughput with the same BER performance Figure ... system with 4Tx, 4Rx with our proposed scheme (solid) and DOC-STFS- CDMA [9] (dotted) in a slow fading frequency-selective environment Fig BLER comparison for OFDM-CDMA system with 4Tx, 4Rx with ... is chi-squared random variable with Nt Nc degrees of freedom It is clear that when interference is small enough, the most dominant part will be the χ2 which agrees with Raleigh fading channel where...

Ngày tải lên: 18/06/2014, 22:20

... antenna, as BER curves for the 2D OFDM-CDMA with users coincides with our proposed system but with users Therefore, our proposed scheme has twice the throughput with the same BER performance Figure ... procedure with the time-frequency spreading grid pattern corresponding to the transmitter can not be processed until all the symbols within one super-frame are received Then by using a MMSE or ... is chisquared random variable with NtNc degrees of freedom It is clear that when interference is small enough, the most dominant part will be the c which agrees with Raleigh fading channel where...

Ngày tải lên: 20/06/2014, 21:20

... For instance, cellular systems normally suffer from two forms of interference: the interference from within the cell and the interference from outside the cell If the transmitted signals appear ... registers with feedback A shift register consists of several memory stages linked together consecutively along with feedback logic The shift register operates with a master clock, and with each ... number of frequencies needed for a given cellular network to ensure that interference within the same frequency (i.e., co-channel interference) is below a tolerable level For analysis' sake, cells...

Ngày tải lên: 18/04/2014, 12:26

... mapping and ideal channel estimation are assumed We employ MMSE detection, with successive interference cancelling to reduce the inter-user interference in the MU-MIMO case From the discussion in ... SC-SFBC with variable p: kmph, 120 localized subcarriers, QPSK 1/2, MMSE decoding with ideal channel estimation are not optimal from a user-egoistic point of view, since they were optimized with ... subcarriers), and of lower inter-user interference profile (MS0 only suffers from inter-user interference within 1/5 of its spectrum, while MS is interfered within the totality of its spectrum)...

Ngày tải lên: 21/06/2014, 00:20

... the multiple access interference, the additive noise, and the multipath propagation effect Due to the multiple access interference term, information bit estimation may be wrong with a certain probability, ... probabilistic expectations, with respect to the phase shifts, time delays, and data symbols According to such an approach, in asynchronous DS-CDMA systems, the average interference parameter may ... can be evaluated without knowledge of the cross-correlation functions of the spreading codes used, but by resorting to the proper aperiodic correlation definition When dealing with binary De Bruijn...

Ngày tải lên: 21/06/2014, 03:20

... similar forms The CRLB that is associated with (A.3) is derived as follows (That associated with (A.4) can be derived similarly) Differentiation of (A.3) with respect to ω1 yields ∂ ln L1 ∂ M = ... proposed method with that of the ML-based greedy search method It reveals that the proposed algorithm has comparable performance to that of the ML algorithm for a balanced block with K = 56 Figure ... transition time K is set randomly between and M with a uniform distribution As indicated in Figure 6, the performance of the proposed algorithm is similar to that with K = 56 8 EURASIP Journal on Advances...

Ngày tải lên: 21/06/2014, 08:20

... Performance of the MMSE detector can be improved with the reliable channel-parameter prediction, and so the onestep parameter prediction in (32) will be used for MMSE detector with a decision-directed ... enhanced with this information In consequence, the proposed method will have better performance than the conventional MMSE detectors with the use of white noise in each subchannel To design the MMSE ... method without one-step predictor has the best performance with slow velocity because the channel variation is slow However, when the mobile moves with high velocity, the proposed method with a...

Ngày tải lên: 21/06/2014, 08:20

... (l + 2)N × with +1 in position number k and zeros elsewhere By calculating the derivative with respect to r∗ , where (·)∗ means complex i conjugation, the MMSE receiver filter (the MMSE filters ... algorithm In Section 5, numerical results obtained with the proposed algorithm are presented and comparisons are made against the MMSE receiver with block memory Conclusions are drawn in Section ... R1×2(l+1)M with radius and center at the origin The shaded sector of (b) represents the part of the cone in R1×2(l+1)M with vertex at the origin that is lying inside the hypersphere with respect...

Ngày tải lên: 21/06/2014, 22:20

... the MMSE multiuser-antenna detector is given by yMMSE = BχB + σ I −1 BHCr, T MMSE MMSE MMSE yMMSE = y1 , y2 , , yK , MMSE, nT MMSE, 1 MMSE, 2 MMSE y1 = yk , yk , , yk (20) T , where I is a ... Reconstructed interference b1 MMSE, 1 y1 PIC y1,1 MF,2 y1 MMSE, 2 y1 PIC y1,2 r MIMO-MF MF,1 y2 MF,2 y2 y1 PIC y1,nT MMSE, 1 y2 MMSE, 2 y2 PIC y2,2 ST-mux Π TD α1 DD PIC y2,1 MMSE, nT MMSE detector ... r MMSE detector MF,1 y2 MF,2 y2 MF,nT y2 PIC,1 y1,nT MMSE, 1 y2 MMSE, nT PIC,p y1,nT Π Π TD1 Π ST-mux TD1 TD1 α1 p TD p α1 DD b1 y2,1 PIC,1 y2,2 PIC,1 y2,nT PIC,p y1 PIC,p PIC,1 y2,1 MMSE, 2...

Ngày tải lên: 21/06/2014, 23:20

... parallel interference cancellation in CDMA,” IEEE Transactions on Communications, vol 48, no 1, pp 152–161, 2000 [6] A.-L Johansson and L K Rasmussen, “Linear group-wise successive interference cancellation ... detector which we call for brevity the chip-level linear BSOR-GSIC detector consists of group interference cancellation units (GICU) arranged in a multistage structure of M stages as illustrated in ... Consequently, the chip-level linear BSOR-GSIC converges if λmax ΩG y1,g −Rg,G ym−1,G Figure 3: Basic interference cancellation unit for the symbol-level BSOR-GSIC detector However, the evaluation of the...

Ngày tải lên: 22/06/2014, 00:20

... parallel interference cancellation in CDMA,” IEEE Transactions on Communications, vol 48, no 1, pp 152–161, 2000 [6] A.-L Johansson and L K Rasmussen, “Linear group-wise successive interference cancellation ... detector which we call for brevity the chip-level linear BSOR-GSIC detector consists of group interference cancellation units (GICU) arranged in a multistage structure of M stages as illustrated in ... Consequently, the chip-level linear BSOR-GSIC converges if λmax ΩG y1,g −Rg,G ym−1,G Figure 3: Basic interference cancellation unit for the symbol-level BSOR-GSIC detector However, the evaluation of the...

Ngày tải lên: 22/06/2014, 06:20

... system is globally bounded with respect to x1 uniformly in x20 , then there exists ε > 0, such that it is globally ultimately bounded with respect to x1 uniformly in x20 with an ultimate bound ε ... nonlinear dynamical system is globally ultimately bounded with respect to x1 uniformly in x20 with an ultimate bound ε, then it is globally bounded with respect to x1 uniformly in x20 The following ... 4.4 and 4.14 , respectively, fx ·, · is nonnegative with respect to x, fz ·, · is nonnegative with respect to z, and Δf ·, · is nonnegative with respect to x and nz nx belongs to F For a given...

Ngày tải lên: 22/06/2014, 11:20

... problem can be formulated as a Markov decision process (MDP) With a required power control feasibility condition (PCFC), combined with an ARQbased reduced-outage-probability (ROP) algorithm, ... modulation and coding scheme In the above expression, the interference is assumed to be additive white Gaussian noise, which is reasonable in a system with enough interferers × ck t − nT − τ k dt + nk ... guaranteed by the constraints of this MDP In the following, we first derive an approximate PCFC combined with an ARQ-based reduced-outage-probability (ROP) algorithm that can guarantee the outage...

Ngày tải lên: 22/06/2014, 19:20