Performance analysis of the distributed ZF beamformer in the presence of carrier frequency offset | IEEE Conference Publication | IEEE Xplore

Performance analysis of the distributed ZF beamformer in the presence of carrier frequency offset


Abstract:

We study the impact of residual carrier frequency offset (CFO) on the performance of the distributed zero-forcing (ZF) beamformer in the interference channel, i.e., where...Show More

Abstract:

We study the impact of residual carrier frequency offset (CFO) on the performance of the distributed zero-forcing (ZF) beamformer in the interference channel, i.e., where multiple nodes simultaneously transmit the same data towards multiple receivers. Distributed transmissions have been proposed to mitigate the co-channel interference inherent to such scenarios and provide the gains of multi-antenna systems. However, frequency synchronization among the cooperating transmitters is required. Even when the transmitters perform frequency synchronization before transmission, a residual CFO is to be expected that degrades the performance of the system due to the in-phase misalignment of the incoming streams. This paper presents the signal-to-noise ratio analytically and the diversity semi-numerically of the distributed ZF beamformer for the ideal case and in presence of a residual CFO. We illustrate our results and their accuracy through simulations.
Date of Conference: 29 August 2011 - 02 September 2011
Date Added to IEEE Xplore: 02 April 2015
Print ISSN: 2076-1465
Conference Location: Barcelona, Spain

References

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