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Time offset estimation method and system for NR uplink control channel

A time offset estimation and control channel technology, applied in the field of 5G communication, can solve the problems of correlation peak-to-peak position offset multipath power, unobtainable, large time offset estimation error, etc., to reduce peak index offset error, improve time Effect of Partial Estimation Accuracy

Active Publication Date: 2022-08-09
四川创智联恒科技有限公司
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Problems solved by technology

[0004] The technical problem solved by the present invention is to overcome the fact that the existing technology cannot be used in the PUCCH multi-user code division scenario, and the correlation peak-to-peak position will shift after the multi-user time-domain waveforms are superimposed on each other, and the multipath power cannot be obtained, which will lead to time deviation. The disadvantage of large estimation error provides a time offset estimation method for NR uplink control channels, which can effectively improve the accuracy of time offset estimation in PUCCH multi-user multiplexing scenarios

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  • Time offset estimation method and system for NR uplink control channel
  • Time offset estimation method and system for NR uplink control channel
  • Time offset estimation method and system for NR uplink control channel

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Embodiment 1

[0052] In this embodiment, assuming the number of antennas of the base station is 1, PUCCH format 1 uses frequency jump launch (2 frequency jump RB positions, which are recorded as frequency jump RB0 and frequency jump RB1). This OFDM symbol (7 symbols in each frequency jump position), 4 users use the same context time domain OCC code (( ) And data time domain OCC code (( ), The PUCCH format 1 signal is emitted at the same time frequency position. The frequency domain code tracting number of the 4 users is 0 / 3 / 6 / 9, respectively. ,in Indicates frequency jump position, Indicates the frequency domain code number, Express the sub -carrier index, Indicates an OFDM symbol index in a single frequency jump RB.

[0053] What needs to be declared is that the execution timing of each step described in this embodiment is not the only one. For example, step 6 can be executed before or before that step, so this embodiment only describes one possible execution of execution. order.

[00...

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Abstract

The invention discloses a time offset estimation method and system for an NR uplink control channel. The method comprises the following steps of: acquiring a PUCCH (Physical Uplink Control Channel) receiving signal extracted in a current time slot of a base station; performing conjugate multiplication operation on the signal and a local spread spectrum sequence of a current symbol frequency domain code channel 0 to obtain a conjugate receiving signal; separating pilot frequency from data; removing an OCC sequence; the pilot frequency and data correlation peak indexes are averaged, the time offset value of each user is calculated, and the method effectively improves the time offset estimation precision of the PUCCH multi-user multiplexing scene.

Description

Technical field [0001] The invention involves 5G communication technology fields, especially the time estimation method and system of a NR uplink control channel. Background technique [0002] In the NR (new empty mouth, the fifth -generation mobile communication technology) system, the upward control channel (PUCCH) format 0 format 1 is carried to carry information or distinguish the user through a cycle shift of the frequency domain sequence. Different circular shifts are called different code tracts. The code tract of a large scene during the upside will be offset by the expected position, resulting in a decline in PUCCH detection and demodulation performance. [0003] In order to overcome this problem, the base station first needs to estimate the time of the user, and then adjust the PUCCH detection scheme according to the time decisive results. The accuracy of the estimated accuracy in the above scheme is the key to affecting the system performance. At present, multiple pate...

Claims

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Application Information

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IPC IPC(8): H04B1/713H04L5/00
CPCH04B1/713H04L5/001H04L5/0048Y02D30/70
Inventor 吕磊
Owner 四川创智联恒科技有限公司
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