Joint Detection of Integral Carrier Frequency Offset and Preamble Index in OFDMA WiMAX Downlink Synchronization

Hung, Kun-Chien; Lin, Dekang

doi:10.1109/wcnc.2007.367

Cited by 14 publications

(6 citation statements)

References 6 publications

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“…These reference symbols carry also the CELL-ID information. Joint CELL-ID detection and ICFO estimation algorithms are proposed in [19,20]. The task of finding the CELL-ID is named Cell Search (CS).…”

Section: Joint Icfo and Cs Estimationmentioning

confidence: 99%

Embedded reconfigurable synchronization & acquisition ASIP for a multi-standard OFDM receiver

2012

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Embedded reconfigurable architectures are currently attracting increasing attention in the wireless communications industry due to the escalating number of wireless standards in today's market. Application specific instruction-set processors (ASIPs) present a reconfigurable solution that offers a compromise between programmability and low power consumption. In this article, the design and implementation of an embedded synchronization and acquisition ASIP for OFDM based systems is proposed. The engine architecture is presented and the programming model is explained in details. The proposed engine is scalable and it can be configured to support a multitude of synchronization algorithms and OFDM standards. While applicable to many OFDM systems, the proposed architecture was successfully verified on long term evolution (LTE Rel. 8) and WiMAX 802.16e systems. A partial list of synchronization and acquisition algorithms are tested on the engine for the two standards, and the results highlight the capabilities of the engine. The processor has been synthesized with 0.18μm standard cell CMOS library. It is estimated to occupy 1.1 mm 2 and the projected power consumption is 7.9mW at 120 MHz, which meets the speed requirements of the tested standards. More results are included within the article.

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Section: Joint Icfo and Cs Estimationmentioning

confidence: 99%

Embedded reconfigurable synchronization & acquisition ASIP for a multi-standard OFDM receiver

2012

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“…Fine frequency offset estimation is always performed before Cell-ID detection [10]. In the previous receiver implementations, no periodicity in the preamble was exploited and thus the lower efficiency of the fine frequency offset estimation techniques affects Cell-ID identification and hence correct acquisition of the signal.…”

Section: Proposed Algorithm For Fine Frequency Offset Estimationmentioning

confidence: 99%

A novel frequency offset estimation technique for Mobile WiMAX

Khairy

2010

Trans Emerging Tel Tech

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In this paper, a novel frequency offset estimation technique for the OFDMA based WiMAX system is proposed. It is perceived that Mobile WiMAX based on the IEEE802.16e standard has an aperiodic preamble, hindering the most efficient frequency offset estimation techniques which are based on utilising the preamble's periodicity. In this paper, a novel technique for creating periodicity in the preamble by exploiting its design is proposed and evaluated. The results show that the proposed scheme has a significantly better performance than the currently used techniques.

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“…In WiMAX systems based on the IEEE 802.16e OFDMA physical layer specification, the downlink (DL) synchronization involves the timing and frequency synchronization as well as the identification of the preamble index. There have been several papers discussing on the synchronization for the OFDMA downlink of WiMAX in recent years [4], [5]. The typical process for the initial downlink synchronization consists of obtaining the frame boundary, estimating and correcting the fractional frequency offset, and identifying the cell specific preamble sequences and the integer frequency offset.…”

Section: Introductionmentioning

confidence: 99%

A new carrier frequency synchronization scheme for OFDMA downlink of WiMAX

Xue

Wang

et al. 2011

2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)

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A new scheme of the carrier frequency synchronization in the OFDMA downlink of WiMAX is proposed in this paper. The proposed method utilizes the preamble structure and the properties of the Inverse Fast Fourier Transform (IFFT) to estimate the carrier frequency offset (CFO) without the knowledge of the content about the actual transmitted preamble. An iterative scheme is proposed to eliminate the influence of the wireless multipath channel to the estimated result. Simulation results show that the proposed method is suitable for the carrier frequency synchronization in the frequency-selective fading channel.

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Joint Detection of Integral Carrier Frequency Offset and Preamble Index in OFDMA WiMAX Downlink Synchronization

Cited by 14 publications

References 6 publications

Embedded reconfigurable synchronization & acquisition ASIP for a multi-standard OFDM receiver

Embedded reconfigurable synchronization & acquisition ASIP for a multi-standard OFDM receiver

A novel frequency offset estimation technique for Mobile WiMAX

A new carrier frequency synchronization scheme for OFDMA downlink of WiMAX

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