[PDF] Top 20 Filtered delaysubspace approach for pilot assisted channel estimation in OFDM systems

... With the use of a comb pilot pattern arrangement [4, 5], we propose a channel estimator based on the application of subspace projection and low-pass filtering.. Observing that the pilot [r] ... See full document

... code in adaptive modulation and coding is conducted in ...optimal approach based on prediction of the average BER over all sub carriers. In [6], an adaptive OFDM system with changeable ... See full document

... In pilot assisted estimation of orthogonal frequency division multi- plexing (OFDM) channels, the simple least-squares (LS) approach leads to very inaccurate estimates for high ... See full document

... real systems (144 bits for EDGE) and there is an integer number of payloads for each OFDM ...of pilot subcarriers in pilot assisted channel estimation is 128, which ... See full document

... improving channel estimation accuracy in MIMO-OFDM system because channel state information is required for signal detection at receiver and its accuracy affects the overall performance ... See full document

... demonstrated in [4] and they are described as having a sturdy error correcting performance (oriented to transmit short and sensible infor- mation), as being able to use Fast Fourier Transform (FFT) to execute ... See full document

... Este artigo propõe uma arquitetura de sincronização para sistema OFDM que corrige o efeito de desvio de frequência através de duas operações independentes entre si. Um estimador de offset de frequência, operando ... See full document

... the OFDM (Orthogonal Frequency Division Multiplexing) technique has received special attention to the mobile radio communication in the cellular systems ...ability in dealing with ... See full document

... Summed In- verse Carrier to interference Ratio ...uplink channel covariance matrix (UCCM), while LCMV needs a previous estimation of the angle or direction of arrival (DOA) of the desired ...used ... See full document

... for OFDM system implementation at radio bearer of LTE- ...throughput in Release-10 is ...proposed in IMT-Advanced, can be achieved in LTE-A using MIMO and wider transmission bandwidth of 70 ... See full document

... use in the OFDM to improve the communication performance and ...used in this paper. Compare to the FFT based MIMO-OFDM it has lot ...functional in several applications such as ... See full document

... the channel that has the best ...best channel each time, getting as a result, the optimal BER and throughput ...the channel condition when using Antenna subset ...the channel condition is ... See full document

... a channel model for both OFDM and its alternative SCT and validate both by implementing them at DRM ...eliminated in both OFDM and SCT by inserting the guard intervals (T g ) maintained larger ... See full document

... placed in a circular buffer, starting with the systematic bits, and followed by an interlaced sequence of parity ...size. In this case, the readout will include the same bit positions more than ... See full document

... sufficient channel state information (CSI) ...used in the wireless communication ...the channel scales with the number of antennas which poses a big challenge in implementing massive MIMO ... See full document

... For end users, the large growth in available services can involve greater freedom or more chaos or both. For developers, Web services computing provide important theoretical and engineering challenges as they ... See full document

... forming in high data rate OFDM-MIMO ...Rotation. In this paper a hardware oriented two-step diagonalization SVD scheme is derived from simple two-sided unitary transformations developed to ensure ... See full document

... 6.2 IF estimate, in -5 dB noisy data, for 100 trials. The dashed line represents the true IF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 6.3 Source estimate, obtained via ... See full document

... coded OFDM (STBC-OFDM) under time selective fading and that on space-frequency block coded OFDM (SFBC-OFDM) under frequency selective ...coherent systems over MIMO quasi static flat ... See full document

... scenarios in the real world ...area. In urban areas where there is no direct line-of-sight path between the transmitter and the receiver, the presence of high-rise buildings causes severe diffraction ... See full document