Time domain synchronization using Newman chirp training sequences in AWGN channels

Boumard, Sandrine; Mämmelä, Aarne

doi:10.1109/icc.2005.1494527

Cited by 14 publications

(7 citation statements)

References 10 publications

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“…If the transmission system operates on a Rayleigh flat fading channel, the symbol-error probability and bit-error probability can be derived as [28], [29] P s,Rayleigh (γ s ) . = 1 − γ s 2 +γ s (17) and…”

Section: A Theoretical Derivationmentioning

confidence: 99%

“…Meanwhile, several previous works have taken chirp or linearly frequency modulated (LFM) signals as training sequences for time-domain (TD) synchronization [17] in OFDM systems assisted from Frank codes and other similar sequences [18]- [20]. Newman phases were also employed in an OFDM system and proven suboptimal for the purpose of reducing peak-to-average power ratio (PAPR) [21], [22].…”

Section: Introductionmentioning

confidence: 99%

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LS Channel Estimation for Mobile OFDM Communications on Time-Varying Frequency-Selective Fading Channels

Lin

2007

2007 IEEE International Conference on Communications

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A least-squares (LS) channel estimation (CE) technique for mobile OFDM communications over a rapidly timevarying frequency-selective fading channel is investigated in this paper. The proposed technique keeping the comb-type pilot arrangement can achieve low error probability by accurately estimating channel impulse response (CIR) and effectively tracking rapid CIR variations. In addition, the LS CE technique proposed here is conducted in the time domain (TD); meanwhile, a generic estimator is, thus, performed serially block by block without assistance from a priori channel information and without increasing computational complexity. By taking advantage of linearly frequency-modulated (LFM) or pseudorandom signals that are transceived for the purpose of sounding pilot subchannels, the proposed LS channel estimator (CE) can inherently perform pseudo-noise (PN) matched filtering (MF) to suppress multipath interference (MPI) caused by frequency-selective fading and inter-carrier-interference (ICI) resulting from data subchannels. The dual optimality of the LFM and PN pilot symbols is verified for both time-domain (TD) and frequency-domain (FD)CEs. Furthermore, the proposed technique also exhibits good resistance against residual timing errors occurring with the DFT demodulation. Extensive computer simulations in conjunction with statistical derivations show the superiority of the proposed technique.

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Section: A Theoretical Derivationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

LS Channel Estimation for Mobile OFDM Communications on Time-Varying Frequency-Selective Fading Channels

Lin

2007

2007 IEEE International Conference on Communications

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“…In accordance with the transform invariance property, the Fourier transform of a TD chirp signal can be thought of as a chirp signal in the FD [21]. In addition, a frequency offset leads to a shift in the Fourier transform of the received signal.…”

Section: Frequency-offset Estimationmentioning

confidence: 99%

Timing‐delay and frequency‐offset estimations for initial synchronisation on time‐varying Rayleigh fading channels

Lin

Hsu

2013

IET Communications

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“…Aiming at high probability of detection in the low signalto-noise ratio (SNR) regime and moderate latency, a detection approach based on matched filtering is widely used in the literature. The robustness of chirp sequences against high FOs in a matched filter-based detection, as well as their special time and frequency properties, have motivated their application in the detection process and in the estimation of the synchronization parameters [1] [2]. In [1], a training sequence consisting of a linear up-chirp followed by its conjugate, known as linear updown-chirp, assists the synchronization process under additive white Gaussian noise (AWGN) channel conditions.…”

Section: Introductionmentioning

confidence: 99%

A Chirp-Based Frequency Synchronization Approach for Flat Fading Channels

Martínez

Kumar

Chafii

et al. 2020

2020 2nd 6G Wireless Summit (6G SUMMIT)

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In different new and emerging technologies, where high frequency offsets (FOs) are expected due to the low-cost nature of the local oscillators, and low sampling rates are chosen for the sake of power efficiency, accurate FO estimation becomes a challenging task. This work proposes a frequency synchronization approach based on a dual-chirp training sequence. Its performance is evaluated by means of simulations and validated with the derived Cramer-Rao lower bound. It is shown that the proposed method achieves near-optimum performance with lower complexity than the state-of-the-art approach.

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Time domain synchronization using Newman chirp training sequences in AWGN channels

Cited by 14 publications

References 10 publications

LS Channel Estimation for Mobile OFDM Communications on Time-Varying Frequency-Selective Fading Channels

LS Channel Estimation for Mobile OFDM Communications on Time-Varying Frequency-Selective Fading Channels

Timing‐delay and frequency‐offset estimations for initial synchronisation on time‐varying Rayleigh fading channels

A Chirp-Based Frequency Synchronization Approach for Flat Fading Channels

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