Training sequence versus cyclic prefix-a new look on single carrier communication

Deneire, Luc; Gyselinckx, B.; Engels, M.

doi:10.1109/4234.935746

Cited by 181 publications

(97 citation statements)

References 8 publications

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“…(7) Where j is imaginary number and M is relative prime of N. N itself is a number of subcarrier. When there is a frequency offset in the system, the received signal will is represented in (8). (8) The relationship between timing deviation and frequency offset is used to find the fine timing and the CFO.…”

Section: Cp Based Synchronization Methodsmentioning

confidence: 99%

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Performance Analysis of CP-Based and CAZAC Training Sequence-Based Synchronization in OFDM System

Yudha¹,

Astawa²,

Sudarsono³

2016

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Orthogonal Frequency Division Multiplexing (OFDM) is a popular wireless data transmission scheme. However, its synchronization is still being a major problem when it is applied in real hardware. Cyclic Prefix (CP) based synchronization is one of the solutions in this problem, but CP has high crest factor. In the other hand, CAZAC sequence is another solution with lower crest factor but the higher complexity and also CAZAC has potential in security and channel estimation implementation. The performance between CP and CAZAC sequence based synchronization in OFDM system is analyzed in this paper. The real hardware, Universal Software Rado Peripheral (USRP), is used to prove the analysis. The CAZAC sequence has 10% performance increased in frequency offset than CP based synchronization.

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Section: Cp Based Synchronization Methodsmentioning

confidence: 99%

“…The synchronization in OFDM systems have divided into data aided and non-data aided configuration [8]. The data aided configuration uses pilot sequence or training symbol to estimate the frequency and time mismatch of OFDM transmission.…”

mentioning

confidence: 99%

Performance Analysis of CP-Based and CAZAC Training Sequence-Based Synchronization in OFDM System

Yudha¹,

Astawa²,

Sudarsono³

2016

emitter

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“…The conventional CP (i.e., a copy of the tail in the transmitted block) is basically unknown before detecting data. Therefore, inserting a unique word (UW) as a known pilot sequence instead of the CP has been proposed [16]- [18]. In this case, the data block size is decreased to (N −N P ) symbols for satisfying periodicity within the FFT window as shown in Fig.…”

Section: Channel Estimation Using Known Pilot Sequencementioning

confidence: 99%

Subblock Processing for Frequency-Domain Turbo Equalization under Fast Fading Environments

Kambara

Nishimoto

Nishimura

et al. 2009

IEICE Trans. Commun.

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SUMMARYFrequency-domain equalization (FDE) has been studied for suppressing inter-symbol interference (ISI) due to frequency selective fading in single carrier systems. When a high-mobility terminal is assumed in the system, channel transition within an FDE block cannot be ignored. The ISI reduction performance of FDE degrades since the cyclicity of the channel matrix is lost. To solve this problem, a method of dividing the received data block into multiple subblocks has been proposed, where pseudo cyclic prefix (CP) processing is introduced to realize periodicity in each subblock. In this method, the performance is degraded by the inherentlyinaccurate pseudo CP. In this paper, we study the application of frequencydomain turbo equalization (FDTE) to subblock processing for improving the accuracy of pseudo CP. The simulation results show that FDTE with subblock processing yields remarkable performance improvements. key words: fast fading, single carrier transmission, SC/MMSE-FDTE, unique word, subblock processing

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“…We previously showed [8] that the use of training sequence-aided SC (TA-SC) block transmission [9,10] instead of CP-SC block transmission can significantly reduce the probability of removing the correct path at early stages in QRM-MLBD in the case of single-input single-output (SISO) case. We apply previously proposed training sequence-aided QRM-MLBD to the SC-MIMO spatial multiplexing.…”

Section: Introductionmentioning

confidence: 99%

Training Sequence-Aided QRM-MLD Block Signal Detection for Single-Carrier MIMO Spatial Multiplexing

Yamamoto

Takeda

Adachi

2011

2011 IEEE International Conference on Communications (ICC)

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Abstract-We propose a maximum likelihood block signal detection using QR decomposition and M-algorithm (called QRM-MLBD) for training sequence-aided single-carrier (TA-SC) multi-input multi-output (MIMO) spatial multiplexing. QRM-MLBD can significantly improve the packet error rate (PER) performance of cyclic prefix-inserted single-carrier (CP-SC) MIMO spatial multiplexing when compared to the frequency-domain minimum mean square error (MMSE) detection. However, in order to achieve the sufficiently improved performance, the use of a fairly large number M of surviving paths in the M-algorithm is required because if smaller M is used, the probability of removing the correct path at early stages increases. In this paper, to reduce this probability, we propose the use of TA-SC transmission instead of CP-SC transmission and show that the use of training sequence can significantly reduce the probability of removing the correct path at early stages in QRM-MLBD. We show, by computer simulation, that TA-SC MIMO spatial multiplexing using QRM-MLBD can achieve the PER performance similar to CP-SC MIMO spatial multiplexing while significantly reducing the computational complexity, about 8% of computational complexity of CP-SC MIMO in the case of 16QAM and 4×4 MIMO spatial multiplexing.

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Training sequence versus cyclic prefix-a new look on single carrier communication

Cited by 181 publications

References 8 publications

Performance Analysis of CP-Based and CAZAC Training Sequence-Based Synchronization in OFDM System

Performance Analysis of CP-Based and CAZAC Training Sequence-Based Synchronization in OFDM System

Subblock Processing for Frequency-Domain Turbo Equalization under Fast Fading Environments

Training Sequence-Aided QRM-MLD Block Signal Detection for Single-Carrier MIMO Spatial Multiplexing

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