Cyclic Shift Method for Root Sequence and Apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsQi Feng, Fan Wang
Life of this patent
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Abstract
A cyclic shift method includes a communication apparatus that determines a cyclic shift of a root sequence, where the cyclic shift of the root sequence is associated with a sequence length of the root sequence, a root sequence number, a maximum round-trip time, and a maximum Doppler frequency shift; and the communication apparatus determines a cyclic shift sequence based on the cyclic shift of the root sequence, where an ambiguity function of the cyclic shift sequence is equal to zero within a range of the maximum round-trip time and the maximum Doppler frequency shift. The communication apparatus can obtain, based on the root sequence, the cyclic shift sequence whose ambiguity function is equal to zero.
Claims20
A method, comprising:
- determining a first cyclic shift of a first root sequence, wherein the first cyclic shift is associated with a sequence length of the first root sequence, a root sequence number, a maximum round-trip time, and a maximum Doppler frequency shift;
- and
- determining, based on the first cyclic shift, a first cyclic shift sequence,
- wherein a first ambiguity function of the first cyclic shift sequence is equal to zero within a range of the maximum round-trip time and the maximum Doppler frequency shift.
An apparatus, comprising:
- a memory configured to store computer-executable instructions;
- and
- at least one processor coupled to the memory and configured to execute the computer-executable instructions to cause the apparatus to:
- determine a first cyclic shift of a first root sequence, wherein the first cyclic shift is associated with a sequence length of the first root sequence, a root sequence number, a maximum round-trip time, and a maximum Doppler frequency shift;
- and
- determine, based on the first cyclic shift, a first cyclic shift sequence,
- wherein a first ambiguity function of the first cyclic shift sequence is equal to zero within a range of the maximum round-trip time and the maximum Doppler frequency shift.
Dependencies are inferred from the claim text.