Method, base station and system for transmitting subcarriers

A transmission method and sub-carrier technology, applied in modulation carrier systems, transmission systems, multi-frequency code systems, etc., can solve problems such as the inability of user equipment to receive information reliably, and achieve increased cell edge coverage, improved throughput, and reliable decoding. Effect

Active Publication Date: 2010-01-27
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] Embodiments of the present invention provide a subcarrier transmission method, base station and system, which are used to solve the defect that user equipment cannot reliably receive information in the prior art, and can ensure reliable reception of information

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  • Method, base station and system for transmitting subcarriers
  • Method, base station and system for transmitting subcarriers
  • Method, base station and system for transmitting subcarriers

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Embodiment Construction

[0022] The technical solutions of the embodiments of the present invention will be further described below in conjunction with the drawings and specific embodiments. In the 802.16e OFDMA frame structure mode, the signal that needs to be broadcast transmitted. Because the base station uses a single-antenna broadcast transmission method with lower power, the user equipment receives a low signal-to-noise ratio and cannot guarantee reliable decoding of the information. phenomenon. In order to avoid the defects of the prior art, increase the coverage of the base station, and improve the signal-to-noise ratio of user equipment, the embodiment of the present invention provides a multi-antenna omnidirectional beamforming scheme, that is, several sub-carriers of the signal to be transmitted in the entire frequency band Divide into several sending groups, and assign several subcarriers of the signal to be sent in the entire frequency band to M transmitting antennas of the base station fo...

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Abstract

The embodiment of the invention provides a method, a base station and a system for transmitting subcarriers. The method comprises the steps: dividing a plurality of subcarriers of signals to be transmitted on the entire frequency band into a plurality of transmission groups; distributing the subcarriers of the signals to be transmitted on the entire frequency band to at least two transmission antennas of the base station and broadcasting and transmitting the signals. The method and the system for transmitting subcarriers can enhance the average power of each subcarrier for transmitting the same OFDM signal by a plurality of transmission antennae under the condition that each antenna transmits partial data by synchronous / broadcasting / controlling channels formed by omnibearing wave beams, thereby increasing the coverage range of downlink channels of the base station, raising the signal-to-noise ratio for the reception of user equipment, ensuring the reliable decoding of information transmitted by the user equipment to the base station, enlarging district edge coverage and increasing the throughput.

Description

Technical field [0001] The embodiment of the present invention relates to the technical field of untrusted communication, and in particular to a method, base station and system for transmitting subcarriers. Background technique [0002] In the 802.16e Orthogonal Frequency Division Multiple Access (OFDMA) frame structure mode, the first three "OFDM symbols" in the downlink information frame of the base station need to be broadcast and sent to all user equipment. The first three "OFDMsymbols" mentioned above respectively include a synchronization signal (Preamble) signal (occupying one OFDM symbol), a frame control header (Frame Control Header; hereinafter referred to as FCH), and DL_MAP (occupying two OFDM symbols). [0003] Among them, the "Preamble" signal information is used for user equipment to synchronize, obtain cell ID (CellID) information, and receive signal strength indicator (Receive Signal Strength Indicator; hereinafter referred to as RSSI), carrier-to-interference-and-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/02H04L27/26
CPCH04L5/0007H04L27/2655H04L5/0094H04L5/0092
Inventor 王俊王文杰米泉
Owner HUAWEI TECH CO LTD
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