2002
DOI: 10.1109/tbc.2002.804034
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Channel estimation techniques based on pilot arrangement in OFDM systems

Abstract: The channel estimation techniques for OFDM systems based on pilot arrangement are investigated. The channel estimation based on comb type pilot arrangement is studied through different algorithms for both estimating channel at pilot frequencies and interpolating the channel. The estimation of channel at pilot frequencies is based on LS and LMS while the channel interpolation is done using linear interpolation, second order interpolation, low-pass interpolation, spline cubic interpolation, and time domain inter… Show more

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Cited by 1,330 publications
(681 citation statements)
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“…The number of OFDM symbols in the packet varied with the coherence time T c . The channel is block fading over the T c symbols and its filter tap coefficients were generated according to a power-delay profile described by (2). A minimum coherence time of 12µs at 5.2GHz was considered.…”
Section: Simulation Resultsmentioning
confidence: 99%
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“…The number of OFDM symbols in the packet varied with the coherence time T c . The channel is block fading over the T c symbols and its filter tap coefficients were generated according to a power-delay profile described by (2). A minimum coherence time of 12µs at 5.2GHz was considered.…”
Section: Simulation Resultsmentioning
confidence: 99%
“…Substituting for d 2 and σ z = (14), the conditional bit error rate when the MSB is in error is given by,…”
Section: Appendixmentioning
confidence: 99%
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“…One S. Kilaru is working in Electronics and Communication Engineering department, BVRIT Hyderabad College of Engineering for Women, Hyderabad, Telangana, INDIA (e-mail: dr.seetaiah@gmail.com) test bed which gathered our attention is the implementation of OFDM modulation with synchronization technique and error controlling phenomenon as explained in [16]. In [1], to transfer OFDM signals with Quadrature Phase Shift Keying (QPSK), they used GNU radio.…”
Section: Introductionmentioning
confidence: 99%
“…We have compared the performances of all schemes by measuring bit error rates with 16QAM, QPSK, DQPSK and BPSK as modulation schemes, and multipath Rayleigh fading and AR based fading channels as channel models. Robust channel estimation for OFDM systems with rapid dispersive fading channels [2] deals with orthogonal frequency-division multiplexing (OFDM) modulation has a promising technique for achieving the high bit rates required for a wireless multimedia service. Without channel estimation and tracking, OFDM systems have to use differential phaseshift keying (DPSK), which has a 3-dB signal-to-noise ratio (SNR) loss compared with coherent phase-shift keying (PSK).…”
Section: Introductionmentioning
confidence: 99%