Time synchronization method and device for up link of wireless communication system
A wireless communication system and time synchronization technology, applied in the direction of multi-frequency code system, etc., to achieve the effect of small calculation amount, small time synchronization error, and beneficial to engineering realization.
Inactive Publication Date: 2012-10-03
JIANGSU HUACAN TELECOMM
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0008] The technical problem to be solved by the present invention is to provide a time synchronization method and device applied in the uplink of the wireless communication system to solve the problem of realizing the time synchronization of the uplink when the frame structure is fixed
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] The present invention will be described in detail below by taking the E-UTRA wireless communication system as an example.
[0038] Synchronization method among the present invention comprises the following steps:
[0039] a) The transmitting end constructs a reference signal when framing into time slots, the reference signal includes a cyclic prefix and a PN sequence, and is transmitted by the transmitting antenna after framing. where the position of the reference signal is given by figure 1 The position of the short block SB in the time slot structure given in is determined, and a subframe includes 2 short blocks. The number of long blocks LB and the guard interval TI are specified by the E-UTRA system according to different modes. The structure of the reference signal in the short block is composed of P repeated PN sequences (P is a natural number, where the value of P is determined according to the maximum channel delay and the balance of computational complexity), ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a time synchronization method applied to an uplink chain of a wireless communication system. The time synchronization method comprises the following steps: step 1, reference signals are constructed by a sending terminal in the fixed position of a sub frame, and are repeated for P times, and P is a natural number; step 2, signals in the corresponding position are intercepted by a receiving terminal; step 3, a correlation value sequence is obtained by the receiving terminal by utilizing the reference signals and the signals intercepted; step 4, a new correlation value sequence is obtained by the receiving terminal through smoothing the correlation value sequence; steps 5, the receiving terminal weights and averages the new correlation value sequence by the receivingterminal; and step 6, a time synchronization position is determined by the receiving terminal by utilizing the position of the maximal value of the new correlation value sequence after being weightedand averaged. The time synchronization method has the advantages that the time synchronization method is achieved under the frame structure of the wireless communication system, and the load of system resources can not be increased when the precision of the synchronization method is ensured, and the operation is very small, thereby very facilitating the realization of engineering.
Description
technical field [0001] The present invention relates to the field of wireless communication, in particular to a time synchronization method and device applied in the uplink of a wireless communication system. Background technique [0002] With the development of digital signal processing technology and high-speed devices, the initial obstacles to the realization of Orthogonal Frequency Division Multiplexing (OFDM) technology no longer exist. OFDM has been used in Digital Audio Broadcasting (DAB, DigitalAudio Broadcast), Digital Video Broadcasting (DVB, It has been successfully applied in systems such as Digital Vedio Broadcast) and wireless local area network (WLAN, Wireless Local-area Network). OFDM utilizes the orthogonality between sub-carriers, allows the spectrum of sub-channels to overlap each other, and can utilize spectrum resources to a great extent. It converts the high-speed data stream through serial-to-parallel conversion, so that the duration of the data symbo...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 李斌冯波
Owner JIANGSU HUACAN TELECOMM