Compensation of multiple carrier frequency offsets in amplify-and-forward cooperative networks

Won, Yu-Jun; Seo, Bo-Seok

doi:10.1109/pimrc.2013.6666123

Cited by 1 publication

(7 citation statements)

References 14 publications

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“…Figures 8 and 9 show comparisons of the bit error rate (BER) performance of proposed method with the mid-value compensation scheme of [14].…”

Section: Simulation Resultsmentioning

confidence: 99%

“…In this paper, further to the previous study [14], we propose a multiple-CFO compensation scheme for OFDM systems when the paths have different gains. In this condition, the compensation value for CFO, which leads to self-cancellation of ICI, should be changed according to the gain difference.…”

Section: Introductionmentioning

confidence: 90%

“…In [14], we proposed method, to compensate the received signal for the average value of the two CFOs in time domain. Then, the ICIs are almost cancelled themselves and any additional process may not be required in frequency domain.…”

Section: Proposed Self-cancellation Schemementioning

confidence: 99%

“…Under the condition where the multiple CFOs exist, it is difficult to apply the previously proposed scheme to eliminate the effects of multiple CFOs. The method of [14] can compensate only one CFO, so the residual ICI generated by the other CFOs still exists. Furthermore, to cancel the residual ICI, the complex PIC scheme of [13] is required.…”

Section: Introductionmentioning

confidence: 99%

“…In [14] we proposed an ICI cancellation method for a cooperative communication system where the received signal comes from two transmitters simultaneously with different CFOs. The ICI caused by multiple CFOs is to be self-cancelled by time domain processing.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Self-Cancellation of Interchannel Interference for OFDM Systems in Amplify-and-Forward Relay Communication Networks

Won

Ahn

Choi

et al. 2015

International Journal of Distributed Sensor Networks

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We propose a method to compensate the effects of multiple carrier frequency offsets (CFOs) for orthogonal frequency division multiplexing (OFDM) systems. The multiple CFOs, we considered, are caused by several spatially separated frequencyunsynchronized transmitters as in amplify-and-forward relay communication networks or wireless ad hoc sensor networks. Despite its appealing features, OFDM is extremely sensitive to CFO, especially to multiple CFOs. At the receiver, the residual CFO which appears due to incomplete compensation of multiple CFOs destroys orthogonality among subcarriers and brings interchannel interference (ICI). In the proposed scheme, we compensate the CFOs of the received signal by the predesigned value, which results in cancellation of the opposite ICI by each other. This is based on the property that the spectrum of ICIs shown in a subcarrier has similar magnitudes and opposite signs from the fact that spectrum shapes of the ICI are of sinc function. Simulation results are shown to demonstrate the effectiveness of the proposed method.

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“…Figures 8 and 9 show comparisons of the bit error rate (BER) performance of proposed method with the mid-value compensation scheme of [14].…”

Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%

Section: Proposed Self-cancellation Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%