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Coordinated cyclic shift and sequence hopping for ZADOFF-CHU, modified ZADOFF-CHU, and block-wise spreading sequences

A frequency hopping and user technology, applied in code shifting or hopping, multi-frequency code system, modulated carrier system, etc., can solve the problem that the orthogonality of ZC code cannot be maximized

Inactive Publication Date: 2010-12-22
NOKIA NETWORKS OY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

where the cyclic shift given by the ACK / NACK message the UE seeks to send, the orthogonality of the ZC codes cannot be maximized

Method used

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  • Coordinated cyclic shift and sequence hopping for ZADOFF-CHU, modified ZADOFF-CHU, and block-wise spreading sequences
  • Coordinated cyclic shift and sequence hopping for ZADOFF-CHU, modified ZADOFF-CHU, and block-wise spreading sequences
  • Coordinated cyclic shift and sequence hopping for ZADOFF-CHU, modified ZADOFF-CHU, and block-wise spreading sequences

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Embodiment Construction

[0047] Embodiments of the present invention relate to ZC cyclic shift frequency hopping. The purpose of shift hopping in a certain embodiment is to provide improved cross-correlation and interference averaging properties between ZC sequences transmitted by multiple UEs. Embodiments of the present invention propose a coordinated cyclic shift frequency hopping scheme, which is applicable to both demodulated RS and PUCCH. Broadly speaking, the exemplary code hopping scheme presented here can be divided into two distinct aspects: randomness inside a TTI and randomness outside a TTI. A particularly favorable environment for the present invention is that the UL is located in the UTRAN LTE system, although this condition itself is not a limitation of the present invention, because the sequence frequency hopping technique detailed here can be used in any wireless system, such as GSM (Global Mobile communication system), HSDPA (High Speed ​​Data Packet Access), or any other system tha...

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Abstract

A cyclic shift of a reference signal is quantized as a combination of a cell specific cyclic shift with an outcome of a pseudo-random hopping, and an indication of the cell specific cyclic shift is broadcast in the cell. In one embodiment the cyclic shift is quantized as a modulo operation on a sum of the cell specific cyclic shift, the outcome of the pseudo-random hopping, and a user specific cyclic shift, in which case an indication of the user specific cyclic shift is sent in an uplink resource allocation and a user sends its cyclically shifted reference signal in the uplink resource allocated by the uplink resource allocation. The cyclic shift may also be quantized according to length of the reference signal as cyclic_shift_symbol= (cyclic_shift_value * length of the reference signal) / 12; where cyclic_shift_value is between zero and eleven and cyclic_shift_symbol is the amount of cyclic shift given in reference signal symbols.

Description

[0001] Claiming priority from a provisionally pending patent application: [0002] Pursuant to 35 U.S.C.'119(e), this application for patent enjoys priority to the following provisional patent applications: 60 / 927,054 (filed April 30, 2007) and 60 / 64,878 (filed August 15, 2007), so each The disclosures of each are hereby incorporated by reference in their entirety. Technical field: [0003] The exemplary and non-limiting embodiments of the present invention relate generally to wireless communication systems, and more particularly, to the transmission / reception of ZC (Zadoff Chu) sequences, including traditional ZC sequences and modified (e.g., extended or truncated) ZC sequence. Background technique: [0004] The following abbreviations are defined as: [0005] You can refer to 3GPP TR 25.814, V7.0.0 (2006-06), Technical Specification Group Radio Access Network (THCHNICAL SPECIFICATION GROUP RADIO ACCESS NETWORK), Physical Layer Issues of Evolved Universal Terrestrial ...

Claims

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Application Information

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IPC IPC(8): H04J11/00H04L27/26
CPCH04L27/261H04W72/042H04J13/0062H04J13/0074H04L25/0226H04L27/2613H04B7/0413H04L5/0026H04L5/0051H04W72/23H04L5/0048H04J13/0059
Inventor K·胡利K·休格尔K·帕朱科斯基E·蒂罗拉
Owner NOKIA NETWORKS OY
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