Unlock instant, AI-driven research and patent intelligence for your innovation.

Detector and method for continuous phase position sequence

A detection device and a technology of phase detection, which are applied in the direction of phase modulation carrier system, electrical components, multiplexing communication, etc., can solve the problems of large Doppler frequency shift and influence of detection method.

Inactive Publication Date: 2009-03-11
ST ERICSSON SEMICON BEIJING
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, when the terminal moves at a high speed, the mobile phone will switch cells frequently, and read the broadcast information of the new cell frequently. At this time, due to the large Doppler shift
It also affects the traditional detection method

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Detector and method for continuous phase position sequence
  • Detector and method for continuous phase position sequence
  • Detector and method for continuous phase position sequence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be described by taking the application of the present invention in an end user (UE) of Time Division Synchronous Code Division Multiple Access (TD-SCDMA) as an example.

[0028] In the TD-SCDMA system, after the user terminal starts up or selects a new cell, it needs to read the (full) broadcast information on one or more broadcast channels (BCH) of the cell, which requires the receiver to first detect the BCH The location where the P-CCPCH appears, that is, the location where the P-CCPCH appears, because the P-CCPCH carries the BCH.

[0029] In order to explain the process of data transmission and reception in the TD-SCDMA system more clearly, first, refer to Figure 1-3 , describing the frame structure of TD-SCDMA. like figure 1 As shown, TD-SCDMA takes 5ms as a time unit of a subframe. Each TD-SCDMA subframe is divided into 7 ordinary time slots (TS0~TS6) and three special time slots: a downlink pilot time slot (DwPTS), an uplink pilot ...

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

No PUM Login to View More

Abstract

The device includes following parts: phase detection unit for detecting phase sequence of signal received; multiple cascaded delayers connected to the phase detection unit are utilized to delay phase sequences a sub frame; multiple subtracters obtain rotative phase value from subtraction between two adjacent phases; multiple decision units, each decision unit is connected to a subtracter, judging rotative phase value, and assigning specific value including rotation direction and rotation quadrant to the phase value; synthesizer of rotative phase sequences synthesize outputs from decision unit into a rotative phase sequence; a comparator compares rotative phase sequence from decision unit with fixed pattern of rotative phase sequence.

Description

technical field [0001] The present invention relates to a detection device and method for a continuous phase sequence, in particular to a method for determining the occurrence of a P-CCPCH (Primary Common Control Physical Channel) in a mobile communication system TD-SCDMA (Time Division Synchronous Code Division Multiple Access System) A detection device and method for a phase sequence. Background technique [0002] With the development and popularization of wireless communication, the number of mobile communication users is increasing exponentially, especially the mobile users in China have been growing at a rate of more than 150% in recent years. Users have higher and higher requirements for communication speed and quality. In a wireless communication system, some specific instructions or signs are carried by changing the phase of the signal at the transmitter. For example, through quadrature phase shift keying (QPSK) modulation, and then modulate the sequence phase such...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/02H04L27/18
Inventor 董霄剑牟秀红
Owner ST ERICSSON SEMICON BEIJING