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Method, device and synchronous system for sending and receiving synchronous information

A technology for synchronizing information and sending devices, which is applied in the field of communication, and can solve the problems of increasing the complexity of the system at both ends of the sending and receiving, and reducing the synchronization performance, so as to achieve the effects of stable matching performance, improved accuracy, and simple synchronization

Active Publication Date: 2011-06-08
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In the prior art, there is only a synchronization method suitable for SISO system, and there is no synchronization method suitable for MISO or MIMO system. If the synchronization method of SISO system is applied to MISO or MIMO, the synchronization performance will be greatly reduced, or it needs to be greatly increased System complexity at both ends of the transceiver

Method used

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  • Method, device and synchronous system for sending and receiving synchronous information
  • Method, device and synchronous system for sending and receiving synchronous information
  • Method, device and synchronous system for sending and receiving synchronous information

Examples

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Embodiment Construction

[0055] like figure 1 As shown, it is a flowchart of an embodiment of a method for sending synchronization information in the present invention, which includes the following steps:

[0056] Step 101, generating multiple groups of different long complementary Golay sequence pairs based on the short complementary Golay sequence pairs.

[0057] Step 102, selecting a long complementary Golay sequence pair from multiple sets of mutually different long complementary Golay sequence pairs and assigning it to each transmitting antenna.

[0058] Step 103, generating a time-domain synchronization sequence according to the selected long complementary Golay sequence pairs.

[0059] Step 104, performing OFDM modulation on each generated time-domain synchronization sequence to generate OFDM symbols.

[0060] Step 105, adding a cyclic prefix to the OFDM symbol and sending it through corresponding transmit antennas.

[0061] like figure 2 As shown, it is a flowchart of an embodiment of a ...

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Abstract

The invention relates to a method, a device and a synchronous system for sending and receiving synchronous information; wherein, the method comprises the steps as follows: a plurality of different groups of long complementary Golay sequence pairs are generated by short complementary Golay sequence pairs; long complementary Golay sequence pairs are selected out of a plurality of different groups of long complementary Golay sequence pairs and distributed to all transmitting antennas; time-domain synchronous sequences are generated according to all selected complementary Golay sequences; orthogonal frequency division multiplexing modulation (OFDM) is carried out on the time-domain synchronous sequences so as to generate OFDM symbols; the OFDM symbols are respectively sent by all corresponding transmitting antennas after cyclic prefix (CP) is added. The method, the device and the system can be used for the synchronization of distribution-typed multi-antenna OFDM systems; adjacent districts are not easy to be disturbed by each other; accuracy of time delaying and frequency offset estimation is improved, the realization is simple and the stability of match performance is high.

Description

technical field [0001] The invention relates to communication technology, in particular to a method and device for sending and receiving synchronous information, and a synchronous system. Background technique [0002] Orthogonal Frequency Division Multiplexing (hereinafter referred to as OFDM) technology reduces the impact of multipath fading by converting a frequency selective multipath fading channel into a flat channel in the frequency domain. The multiple-input multiple-output (Multiple-Input Multiple-Out-put, hereinafter referred to as: MIMO) technology can generate independent parallel channels in space to simultaneously transmit multiple data streams, thus effectively increasing the transmission rate of the system. Therefore, in the MIMO-OFDM system formed by the combination of OFDM and MIMO technologies, that is, in the OFDM distributed multi-antenna system, the spatial multiplexing technology can provide a higher data transmission rate, and the space-time Diversity...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 倪锐朱近康唐臻飞
Owner HUAWEI TECH CO LTD
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