[PDF] Top 20 Frequency Estimation by Pilot Set Partitioning for OFDM Systems with Multiple Transmit Antennas

... of multiple antennas and transmit diversity techniques has been proposed to improve error performance and capacity of wireless systems ...the frequency selectivity by using several ... See full document

... through wireless channel. After collecting the signal at receiver, by using sub carriers receiver must estimate the channel. The received signal is sum of all signals transmitted from different branches. In the Receiver ... See full document

... optical systems employing high-order modulation formats is phase noise due to transmit and receive ...orthogonal frequency-division multiplexing (CO-OFDM) ...carrier frequency offset ... See full document

... on transmit diversity orthogonal frequency-division multiplexing (OFDM) transmission through frequency-selective channels, this paper pursues a channel estimation approach in time ... See full document

... coherent OFDM-based wireless communication sys- tems can be obtained by sending pilot symbols from the transmitter to the ...introducing transmit diversity, the required pilot symbol overhead ... See full document

... parameter estimation and bit error rate performance for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems in new transmission ... See full document

... multipath. OFDM is a modulation technique which has multiple carrier, it retains various carriers, within the allotted bandwidth, to convey the data from source to ...a multiple parallel narrow band ... See full document

... In pilot-assisted transmissions, there exist various approaches to design the pilot ...a pilot symbol or a data symbol, while in the superimposed case both pilot and data symbols are located ... See full document

... communications systems, timing and channel esti- mates are two important parameters at the receiver in order to reconstruct the ...communications systems. By employing the spatial diversity techniques, ... See full document

... partial transmit sequence (PTS) considered as one of the efficient approaches to restrain the high peak to average-power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) ...on ... See full document

... Orthogonal frequency-division multiplexing (OFDM) is an attractive modulation technique for wideband wireless communications due to its robustness against multipath distortions and flexibility in allocating ... See full document

... the OFDM receiver is outlined in ...complex frequency-domain signal x[n, k] associated with each of the K subcarriers, k = 0, ...previous OFDM-symbol period for employment during the current ...1)th ... See full document

... Orthogonal Frequency Division Multiplexing (OFDM) is a modulation scheme, which is used for transferring data at high rate by using a numerous sub-carrier orthogonal to each ...advantages, OFDM is ... See full document

... of OFDM [2] over single-carrier schemes is its ability to cope up with severe channel conditions without complex equalization ...as OFDM uses many slowly modulated narrow band signals instead of one ... See full document

... Enhanced Service Provisioning in Wireless Multi-hop Networks via Socially-driven Inverse Topology Control Eleni G Stai (National Technical University of Athens / Institute of Com. and Computer Syst., Greece); Vasileios A ... See full document

... of multiple antennas at both the transmitter and receiver to exploit the spatial domain for spatial multiplexing and/or spatial ...and frequency band simultaneously from each transmit antenna, ... See full document

... frames, which must consists a fixed number of symbols each. The space-time trellis encoder takes the frame as input and generates codeword pairs for each input symbol simultaneously for all the transmit ... See full document

... by frequency division multiplexing (FDM) was published in mid ...1980s, OFDM has been studied for high speed modems and for digital mobile communications ...1990s, OFDM has found its applications in ... See full document

... MIMO OFDM systems is estimated using water filling algorithm ...of multiple antennas on both the transmitter and receiver side of a communication link have shown to greatly improve the ... See full document

... The OFDM technique, a multi-carrier modulation scheme in which broadband data is transmitted in parallel as K narrowband channels on K orthogonal subcarriers, has been extensively used by the radio technology ... See full document