Unique word based phase tracking algorithms for SC/FDE-systems

Abstract-The single-carrier block transmission (SCBT), a.k.a. single-carrier frequency-domain equalization (SC-FDE), is being considered as an option technique for the wireless personal area network (WPAN) operating at 60-GHz. To combat the inter-symbol interference (ISI) in non-line-of-sight (NLOS) environments, the frequency-domain equalization (FDE) based on the minimum mean square error (MMSE) criterion is much more effective than the one based on the zero forcing (ZF) criterion. However, MMSE-FDE needs the estimation of both the channel frequency response (CFR) and the signal-to-noise ratio (SNR). In this work, we estimated CFR and SNR based on the complementary Golay sequences whose sum auto-correlation has a unique peak and zero sidelobe. Through simulations, we proved that the proposed CFR and SNR estimation methods are very effective for SCBT system using MMSE-FDE.

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“…The FFT / IFFT length was 256. The guard interval (GI), which was unique word [16], had length of 64. The Golay sequence length (L) was 256.…”

Section: Simulation Resultsmentioning

confidence: 99%

CFR and SNR Estimation Based on Complementary Golay Sequences for Single-Carrier Block Transmission in 60-GHz WPAN

Lei

Huang

2009

2009 IEEE Wireless Communications and Networking Conference

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“…UW structure is introduced to improve the performance of DFE as in Fig.2 (b) [3][4]. It replaces some data bits and also plays a similar role as the CP.…”

Section: Conventional Equalization Schemes In Dft-s Ofdm Systemmentioning

confidence: 99%

“…In fact, as shown later in simulation results, conventional DFE almost cannot be used in DFT-S OFDM systems. Unique word (UW) is proposed in the literatures [3][4][5], as a known symbol sequence, can make error propagation beyond one FFT-block impossible since the last symbols of every block are always decided correctly. But the UW based scheme is not appropriate for DFT-S OFDM which will be detailed latter.…”

Section: Introductionmentioning

confidence: 99%

Iterative decision feedback equalizer with cyclic detection for DFT-S OFDM system

Wang

Yang

Wang

2010

Computers & Electrical Engineering

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Abstract-This paper proposes a simple and efficient decision feedback equalizer (DFE) for Discrete Fourier Transform-Spread Orthogonal Frequency Division Multiplex (DFT-S OFDM) system in Evolved-Universal Telecommunication Radio Access (E-UTRA) [1] uplink transmission. Through cyclic detection and iteration, the new algorithm obtains a noticeable gain than conventional DFE, and is almost as effective as the modified UW based methods but with much higher bandwidth efficiency. Furthermore, it does not need to change the frame structure of existing protocol.

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“…Of course, (11) shows that each received block is dependent upon random signals (the data and noise) as well as the deterministic UW. Consequently, the UW can be exploited to track channel variations by applying the RLS algorithm and treating the UW as the desired signal and the data signal as interference.…”

Section: B Rls Channel Estimation and Trackingmentioning

confidence: 99%

“…The topics of synchronization and phase tracking using the UW were addressed in [9]- [11] and methods for exploiting the UW for equalizer training were described in [7], [8], [12]. Channel estimation and tracking techniques based on the UW were also briefly discussed in [7]- [10], [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Channel and noise variance estimation and tracking algorithms for unique-word based single-carrier systems

Coon

Beach

McGeehan

et al.

1st International Symposium onWireless Communication Systems, 2004.

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Abstract-Single-carrier (SC) wireless communication systems generally require knowledge of the channel and the variance of the additive noise process to equalize a received message. Obtaining this information can be straightforward in stationary environments; however, these parameters constantly change in mobile environments. In this paper, we propose novel algorithms for estimating and tracking the channel and noise variance in SC systems by exploiting a unique word (UW) extension. These UW-based algorithms benefit from low complexity and lend themselves to SC systems employing frequency-domain equalization at the receiver.Index Terms-Frequency-domain equalization (FDE), channel estimation and tracking, unique word (UW).

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Unique word based phase tracking algorithms for SC/FDE-systems

Cited by 41 publications

References 4 publications

CFR and SNR Estimation Based on Complementary Golay Sequences for Single-Carrier Block Transmission in 60-GHz WPAN

CFR and SNR Estimation Based on Complementary Golay Sequences for Single-Carrier Block Transmission in 60-GHz WPAN

Iterative decision feedback equalizer with cyclic detection for DFT-S OFDM system

Channel and noise variance estimation and tracking algorithms for unique-word based single-carrier systems

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