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US 12,191,980 B2Granted
Random access preambles in wireless communication
AssigneeZte Corporation
InventorsChenchen Zhang, Wei Cao, Zhen Yang, Kaibo Tian, Nan Zhang
Life of this patent
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Abstract
Methods, systems, and devices for generating preamble sequences where several Zadoff-Chu (ZC) sequences are generated based on multiple roots and multiple cyclic shifts per root and combined to generate the preamble sequences. Some embodiments may be used in wireless communication embodiments in which large propagation delays and/or Doppler movement are expected.
Claims16
A method of wireless communication, comprising:
- generating, by a wireless device, a preamble sequence by combining a plurality of Zadoff-Chu (ZC) sequences of a first length, wherein the plurality of ZC sequences is based on two or more roots including a first root and a second root different from the first root and a cyclic shift list per root, wherein each ZC sequence is based on a root of the two or more roots and a cyclic shift list corresponding to the root,
- wherein the generating the preamble sequence by combining the plurality of ZC sequences comprises:
- selecting the first root from the two or more roots and an ith cyclic shift list from a set of cyclic shift lists corresponding to the first root;
- selecting the second root from the two or more roots and a jth cyclic shift list from a set of cyclic shift lists corresponding to the second root, wherein an amount of cyclic shift between adjacent sequences in the ith cyclic shift list is different from an amount of cyclic shift between adjacent sequences in the jth cyclic shift list;
- generating a first group of ZC sequences based on the first root and the ith cyclic shift list;
- generating a second group of ZC sequences based on the second root and the jth cyclic shift list;
- and
- generating the preamble sequence by combining the first group of ZC sequences and the second group of ZC sequences;
- and
- generating, by the wireless device, a transmission waveform using the preamble sequence.
7 more elements
A wireless communication apparatus comprising a processor configured to implement a method, comprising:
- generating a preamble sequence by combining a plurality of Zadoff-Chu (ZC) sequences of a first length, wherein the plurality of ZC sequences is based on two or more roots including a first root and a second root different from the first root and a cyclic shift list per root,
- wherein each ZC sequence is based on a root of the two or more roots and a cyclic shift list corresponding to the root, wherein the generating the preamble sequence by combining the plurality of ZC sequences comprises:
- selecting the first root from the two or more roots and an ith cyclic shift list from a set of cyclic shift lists corresponding to the first root;
- selecting the second root from the two or more roots and a jth cyclic shift list from a set of cyclic shift lists corresponding to the second root, wherein an amount of cyclic shift between adjacent sequences in the ith cyclic shift list is different from an amount of cyclic shift between adjacent sequences in the jth cyclic shift list;
- generating a first group of ZC sequences based on the first root and the ith cyclic shift list;
- generating a second group of ZC sequences based on the second root and the jth cyclic shift list;
- and generating the preamble sequence by combining the first group of ZC sequences and the second group of ZC sequences;
- and
- generating a transmission waveform using the preamble sequence.
6 more elements
Dependencies are inferred from the claim text.