In some scenarios such as satellite communication, the initialization of wireless access based on traditional Zadoff-Chu random access preamble may fail due to the large Doppler frequency shift. The two-root preamble, which consists of two Zadoff-Chu sequences with different roots, has been considered as one promising solution for large Doppler. However, in the receiver side the frequency and time offset estimation errors of two-root preamble are always relatively large. In this paper, the underlying reason of the large errors is theoretically analyzed, based on which a novel root pair selection method is proposed. Simulation shows that the resulting root pairs lead to much lower errors in frequency/time offset estimation.


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    Title :

    Root Pair Selection for Two-root Random Access Preamble


    Contributors:
    Zhang, Chenchen (author) / Cao, Wei (author) / Zhang, Nan (author) / Tian, Kaibo (author) / Li, Ruyue (author)


    Publication date :

    2021-04-01


    Size :

    3832539 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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