This paper proposes a novel EWF method for LTE signal transmission. Unlike the classical common public radio interface (CPRI) where the in-phase and quadrature (I/Q) waveforms and the control words (CWs) are transmitted as a binary sequence in the time domain, the proposed scheme transmits the analog I/Q waveforms and quadrature amplitude modulation (QAM) signals that contain CWs via frequency domain multiplexing (FDM) synchronously. The bandwidth of the proposed method is reduced by 45% compared with the digital CPRI compression method in the literature. Furthermore, we propose a novel asymmetric single tone pilot based joint I/Q imbalance, frequency offset and phase noise suppression method for the proposed system. We experimentally demonstrate the EWF transmission of one 20 MHz LTE signals with a CPRI equivalent data rate of 1.228 Gbps as a proof of the concept. The test error vector magnitude (EVM) of the OFDM-64QAM LTE signals is below 2% from -52dBm to -38dBm received power and the CWs are recovered without error. This EWF demo can be extended to support CPRI equivalent data rates of n× 1.228Gbps by aggregating more I/Q waveforms and QAM signals in the frequency domain.


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    Title :

    An Efficient Wireless Fronthaul (EWF) Method for LTE Signal Transmission


    Contributors:
    Cai, Meng (author) / Liu, Qiao (author) / Jiang, Hongli (author) / Cao, Ping (author) / Hong, Cheng (author) / Wei, Jianying (author)


    Publication date :

    2017-06-01


    Size :

    489408 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English





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