Truncated zadoff-chu sequence for lte uplink reference signals
AssigneeIntel Corporation
InventorsCandy Yiu, Shahrnaz Azizi
Life of this patent
Estimating the term…
Abstract
A method to generate truncated Zadoff-Chu sequences is disclosed. A large Zadoff-Chu sequence is generated, based on a maximum transmission bandwidth, then the sequence is truncated based on the actual transmission bandwidth. The Zadoff-Chu sequence is cyclicly extended, as needed, to maintain a quasi-orthogonal characteristic. The result is that there is an increased number of available Zadoff-Chu sequences for distribution in a wireless neighborhood and the rate of interference is reduced.
Claims21
A method, comprising:
- multiplying a maximum resource block size by a number of subcarriers per resource block to obtain a value, wherein the maximum resource block size is based on a bandwidth of a wireless transmission channel;
- obtaining a largest prime number smaller than the value, resulting in a second value;
- generating a Zadoff-Chu sequence using a formula, wherein the sequence is based on the second value;
- and
- truncating the Zadoff-Chu sequence, resulting in a truncated Zadoff-Chu sequence, based on a second resource block size, wherein the second resource block size is associated with a second bandwidth.
A user equipment, comprising:
- an antenna to transmit signals to and receive signals from a remote entity in a wireless neighborhood;
- a transceiver coupled to the antenna;
- a memory to store a software program;
- and
- a processor to execute the software program, wherein the software program performs the following operations:
- receiving, from a base station, an assignment of a Zadoff-Chu sequence from a plurality of Zadoff-Chu sequences;
- receiving, from the base station, an assignment of one or more resource blocks from a plurality of resource blocks, wherein plurality of resource blocks characterize a bandwidth of a wireless transmission channel;
- obtaining the assigned Zadoff-Chu sequence;
- truncating the assigned Zadoff-Chu sequence based on the resource block assignment, resulting in a truncated Zadoff-Chu sequence.
An article comprising a medium storing instructions to enable a processor-based system to:
- generate a Zadoff-Chu sequence using a formula, wherein the formula accepts as input a predetermined value, wherein the predetermined value is based on a bandwidth of a wireless transmission channel;
- receive an indication of which resource blocks to use for transmitting a signal over the wireless transmission channel;
- and
- truncate the Zadoff-Chu sequence based on the indication, resulting in a truncated Zadoff-Chu sequence.
Dependencies are inferred from the claim text.