OFDM Baseband Receiver Design for Wireless Communications

Chiueh, Tzi‐Dar; Tsai, Pei–Yun

doi:10.1002/9780470822500

Cited by 194 publications

(118 citation statements)

References 13 publications

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“…In the MIMO-OFDM communication system it usually uses the transmission of pilot signals as the reference signals [1] to find the channel response, to determine the possible Doppler frequency and then to compensate for the carrier frequency from this estimated carrier frequency drift. In this paper we consider in the high mobility MIMO-OFDM system in the use of hierarchical-modulated 64QAM signals as the pilot reference signals in the estimation of carrier frequency drift.…”

Section: Introductionmentioning

confidence: 99%

Carrier frequency drift estimation for high mobility hierarchical-modulated MIMO-OFDM systems

Lee

Lin

Jan

et al. 2011

IEICE Electron. Express

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Abstract:In this paper the implementation of hierarchicalmodulated pilot signals for carrier frequency drift estimation in high mobility multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) system is introduced. Specifically for a hierarchical-modulated 64QAM-OFDM system in which three Layers with two bits in each Layer are defined from the constellation point and the carrier frequency drift estimation is facilitated from every Layer instead of using all six constellation bits to possibly simplify the design and reduce the time in the estimation process. The carrier frequency drift estimation by using only one Layer and the system performance at the receiver terminal by utilizing this Layer's estimated carrier frequency drift are simulated and compared for various high mobile speeds in Rayleigh fading channels.

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Section: Introductionmentioning

confidence: 99%

Carrier frequency drift estimation for high mobility hierarchical-modulated MIMO-OFDM systems

Lee

Lin

Jan

et al. 2011

IEICE Electron. Express

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“…FFT/IFFT is perhaps one of the most area and power consuming block in OFDM transceiver design [7]. Cooley-Tukey algorithm is the most widely used for calculating FFT.…”

Section: Modulationmentioning

confidence: 99%

“…They are usually realized as linear phase digital filters. In SCO (sampling clock offset) compensation, continuously updating the filter coefficients in real time may consume more hardware resources and even more when the number of taps required are increased [9,10].…”

Section: Synchronizationmentioning

confidence: 99%

State of the art baseband DSP platforms for Software Defined Radio: A survey

Anjum

Ahonen

Garzia

et al. 2011

J Wireless Com Network

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Software Defined Radio (SDR) is an innovative approach which is becoming a more and more promising technology for future mobile handsets. Several proposals in the field of embedded systems have been introduced by different universities and industries to support SDR applications. This article presents an overview of current platforms and analyzes the related architectural choices, the current issues in SDR, as well as potential future trends.

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“…Another group of signal scrambling approaches including Selective Level Mapping (SLM), Partial Transmit Sequence (PTS), and Hadamard Transformation either requires side information at the receiver to decode the input signal or modification of the receiver structure; thus, both are not standards compliant. Active constellation extension is another signal scrambling scheme, where the outer points of signal constellations are extended adaptively so that the PAPR of an OFDM symbol is minimized [3][4][5]. This method does not result in throughput and MER loss and thus is of interest for practical use in many OFDM-based systems.…”

Section: Introductionmentioning

confidence: 99%

On the efficiency of PAPR reduction schemes deployed for DRM systems

Moghaddamnia

Waal

Fuhrwerk

et al. 2016

J Wireless Com Network

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Digital Radio Mondiale (DRM) is the universally, openly standardized digital broadcasting system for all frequencies including LW, MW, and SW as well as VHF bands. Alongside providing high audio quality to listeners, DRM satisfies technological requirements posed by broadcasters, manufacturers and regulatory authorities and thus bears a great potential for the future of global radio. One of the key issues here concerns green broadcasting. Facing the need for high-power transmitters to cover wide areas, there is room for improvement concerning the power efficiency of DRM-transmitters. A major drawback of DRM is its high peak-to-average power ratio (PAPR) due to the applied transmission technology based on Orthogonal Frequency Division Multiplexing (OFDM), which results in non-linearities in the emitted signal, low power efficiency, and high costs of transmitters. To overcome this, numerous schemes have been investigated for reducing PAPR in OFDM systems. In this paper, we review and analyze various technologies to reduce PAPR providing that the technical feasibility and DRM-specific system architecture and edge conditions regarding the system performance in terms of modulation error rate, compliance with frequency mask, and synchronization efficiency are ensured. All evaluations are carried out with I/Q signals which are monitored in real operation to present the actual performance of proposed PAPR techniques. Subsequently, the capability of the best approach is evaluated via measurements on a DRM test platform, where achieved transmit power gain of 10 dB is shown. According to our evaluation results, PAPR reduction schemes based on active constellation extension followed by a filter prove to be promising towards practical realization of power-efficient transmitters.

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OFDM Baseband Receiver Design for Wireless Communications

Cited by 194 publications

References 13 publications

Carrier frequency drift estimation for high mobility hierarchical-modulated MIMO-OFDM systems

Carrier frequency drift estimation for high mobility hierarchical-modulated MIMO-OFDM systems

State of the art baseband DSP platforms for Software Defined Radio: A survey

On the efficiency of PAPR reduction schemes deployed for DRM systems

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