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

An equalization method for cdma2000 reverse access channel

A technology of reverse access channel and equalization method, which is applied in the equalization field of CDMA2000 reverse access channel, and can solve problems affecting the correctness of base station decoding, reverse access channel data frame channel equalization, etc.

Inactive Publication Date: 2018-03-30
WUHAN JIANTONG INFORMATION TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, channel synchronization is only performed on the reverse access channel data frames through the reverse access channel prefix frame, and channel equalization is not performed on the reverse access channel data frames, thus affecting the correctness of base station decoding

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
  • An equalization method for cdma2000 reverse access channel
  • An equalization method for cdma2000 reverse access channel
  • An equalization method for cdma2000 reverse access channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0071] The present invention will be further described in detail below in conjunction with specific embodiments.

[0072] The embodiment of the present invention provides a kind of equalization method of CDMA2000 reverse access channel, comprises the following steps:

[0073] A. Carry out channel estimation to the last prefix frame of the reverse access channel sent by the mobile station, and obtain the channel system parameters of the last prefix frame of the reverse access channel, specifically including the following steps:

[0074] Assume that when the sending end of the mobile station sends data within t time, the system parameter of the reverse access channel is H(t); when the frequency offset is the main channel interference factor,

[0075] H(t)=I h (t)+jQ h (t) (1)

[0076] I h (t)=cos(wt+φ 0 ) (2)

[0077] Q h (t)=sin(wt+φ 0 ); (3)

[0078] where I h (t) is the I channel signal of the reverse access channel system parameter H(t), Q h (t) is the Q channel s...

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 invention discloses a method for equalizing a CDMA2000 reverse access channel, and relates to the technical field of wireless communication. The method includes: performing channel estimation on the last reverse access channel prefix frame sent by a mobile station, and calculating the last reverse The channel system parameters of the access channel prefix frame; according to the channel system parameters of the last reverse access channel prefix frame, the channel system parameters of the reverse access channel data frame are fitted, and the fitted reverse access channel is used The channel system parameters of the data frame perform channel equalization on the data frame of the reverse access channel. The present invention can effectively improve the decoding accuracy of the base station by performing channel equalization on the data frame of the reverse access channel.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an equalization method for a CDMA2000 reverse access channel. Background technique [0002] In the CMDA (Code Division Multiple Access) system, the mobile station uses the reverse access channel to initiate communication with the base station and respond to the paging channel message sent by the base station. The reverse access channel transmits a After coded, interleaved and modulated spread spectrum signal, the reverse access channel is uniquely identified by its common long code mask. [0003] The rate at which the mobile station sends information on the reverse access channel is fixed at 4800b / s. The length of the reverse access channel data frame is 20ms, and only when the system time is an integral multiple of 20ms, the reverse access channel data frame may start to be sent. A paging channel can correspond to a maximum of 32 reverse access channels, numbere...

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): H04L25/02
Inventor 黄建丁国荣李宝利高峰姚勇
Owner WUHAN JIANTONG INFORMATION TECH