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Transmit processing techniques based on switched interleaving and limited feedback for interference mitigation in multi-antenna MC-CDMA systems

Abstract : In this work, we propose transmit processing techniques based on novel switched interleaving, chip-wise linear precoding, and limited feedback for both downlink and uplink multi-carrier code division multiple access (MC-CDMA) multiple antenna systems. We propose transceiver structures with switched interleaving, linear precoding and detectors for both uplink and downlink. In the novel schemes, a set of possible chip-interleavers are constructed and prestored at both the base station (BS) and mobile stations (MSs). For the downlink, a new hybrid transmit processing technique based on switched interleaving and chip-wise precoding is proposed to suppress the multiuser interference (MUI). The BS and MSs are also equipped with another codebook of quantized downlink channel state information (CSI). Each MS quantizes its own downlink CSI and feeds back the index to the BS by a low-rate feedback channel or link, then the selection function at the BS determines the optimum interleaver based on all users? quantized CSIs to transmit signals. Moreover, a transmit processing technique for the uplink of multiple antenna MCCDMA systems requiring very low rate of feedback information is also proposed. Codebook design methods for both interleavers and quantized CSI are also proposed. Simulation results show that the performance of the proposed techniques is significantly better than prior art.
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https://hal.archives-ouvertes.fr/hal-01126021
Contributor : Laboratoire Cedric <>
Submitted on : Friday, March 6, 2015 - 11:36:53 AM
Last modification on : Wednesday, October 16, 2019 - 12:00:03 PM

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  • HAL Id : hal-01126021, version 1

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Yunlong Cai, Rodrigo de Lamare, Didier Le Ruyet. Transmit processing techniques based on switched interleaving and limited feedback for interference mitigation in multi-antenna MC-CDMA systems. IEEE Transactions on Vehicular Technology, Institute of Electrical and Electronics Engineers, 2011, 60, pp.1559 -1570. ⟨hal-01126021⟩

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