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Uplink multi-user pilot method for interference depression between cells

An inter-cell interference and multi-user technology, applied in multi-frequency code systems, signal channels, etc.

Active Publication Date: 2006-07-26
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Facing the challenges of B3G and the competition from the introduction of Wimax technology

Method used

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  • Uplink multi-user pilot method for interference depression between cells
  • Uplink multi-user pilot method for interference depression between cells
  • Uplink multi-user pilot method for interference depression between cells

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Embodiment Construction

[0017] The uplink pilot method proposed by the invention can be used for inter-cell interference suppression and reduce the complexity of the receiver, meeting the requirements of SC-FDMA and OFDMA system uplink access.

[0018] In the present invention, take the uplink transmission subframe structure of 3GPP 25.814 V1.0.1 version as an example, as image 3 shown. In order to reduce the peak-to-average power ratio (PAPR, Peak to Average PowerRatio), the data and pilot transmission adopts the time division multiplexing (TDM, Time DivisionDuplex) method, that is, the long block (LB, Long block) is used for data transmission, and the short block ( SB, Short block) is used for the transmission of pilot information. A cyclic prefix (CP, Cyclic Prefix) is added before each OFDM symbol to overcome inter-symbol interference (ISI, Inter-Symbol Interference) of multipath transmission. Pilot information is used for channel estimation and frequency domain equalization.

[0019] figure...

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Abstract

This invention discloses one frequency guiding method to lower small area interference, wherein, the small area uses wireless materials dispatched minimum sub wave materials blocks as unit to distribute different number of minimum load wave materials blocks for user to make the area user guiding frequency crossing; each minimum small load wave materials blocks guiding frequency to use repeat content range and zero relative sequence and to use different bias phase constant range of near area to make small area user guiding frequency crossing at code area.

Description

technical field [0001] The invention provides an uplink multi-user pilot method for reducing inter-cell interference, which is suitable for single carrier-frequency division multiple access system or orthogonal frequency division multiple access system, especially the current 3GPP long-term evolution system or the fourth generation mobile Communication Systems. Background technique [0002] The 3G mobile communication system can already support certain multimedia services. Meanwhile, wireless local area network (WLAN) technology has been widely considered as the future hotspot coverage system, including IEEE 802.11a / b / g and HIPERLAN / 2. Nevertheless, before the general application of 3G systems, some universities, companies and organizations have extensively carried out related research on B3G (beyond 3G), and conducted preliminary and active discussions on the future development of B3G. Facing the challenge of B3G, there is also competition from the introduction of Wimax t...

Claims

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Application Information

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IPC IPC(8): H04L5/02H04L27/26
Inventor 张建华张平黄琛李佳宁董伟辉周雯
Owner BEIJING UNIV OF POSTS & TELECOMM