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

Method for estimating bit error rate in wireless communicating system receiver

A technology of wireless communication system and bit error rate, which is applied to the shaping network in the transmitter/receiver, baseband system components, etc., can solve the problem of poor demodulation performance of data symbols, difficulty in ensuring good convergence of filter coefficients, error High code rate and other issues

Inactive Publication Date: 2013-11-13
MARVELL WORLD TRADE LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the equalizer 207 follows image 3 When the method shown uses UW for training, it is also difficult to ensure that the filter coefficients converge well at the end of the UW field, especially when the SNR (signal-to-noise ratio) is not high, the filter coefficients are more difficult to converge, resulting in demodulation of data symbols Poor performance, high BER (bit error rate)

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
  • Method for estimating bit error rate in wireless communicating system receiver
  • Method for estimating bit error rate in wireless communicating system receiver
  • Method for estimating bit error rate in wireless communicating system receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] In order to better understand the present invention, specific embodiments of the present invention will be described in detail below. However, it should be understood that these embodiments are only illustrative rather than restrictive, and those skilled in the art can easily make various substitutions, modifications and improvements under the teaching of these embodiments. In addition, in this specification, some well-known structures, components, features, and methods are not described in detail, so as not to obscure the main content of the present invention. In the drawings, unless otherwise specified, the same or similar reference numerals denote the same or similar components.

[0020] In one embodiment of the present invention, an LMS (least mean square) adaptive equalizer is designed to realize coherent demodulation. In the case where the known sequence used for training is short, for example, when there are only 8 symbols in UW in the TCH frame of PHS, in order...

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 estimating error rate of an adaptive equalizer in a wireless communication system, comprising a training process and a judging process executed one by one; during the training process, undergoing iterative computation by each symbol in a known sequence of a received data, so as to regulate a filter coefficient of the adaptive equalizer; during the following judging process, demodulating the received data by the regulated filter coefficient, comprising the following steps of: judging at least one symbol in the known sequence; and calculating an error rate according to the judging result.

Description

technical field [0001] The present invention relates to a wireless communication system, more specifically, to an equalizer used for signal demodulation at a receiving end in a wireless communication system. Background technique [0002] PHS (Personal Handyphone System) is a simple and low-cost wireless communication system that uses simple transmitter / receiver techniques such as DQPSK (Differential Quadrature Phase shift keying) modulation and incoherent differential demodulation in receivers. The PHS has become a widely used communication system due to its simplicity and low cost. [0003] figure 1 The frame format transmitted by the PHS system is shown. Such as figure 1 As shown, there are mainly two frame formats for PHS transmission: control channel (CCH) frame and traffic channel (TCH) frame. The CCH frame is mainly used for synchronization between the base station (CS) and the terminal (PS) and other controls. TCH frames are mainly used to transmit communication...

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): H04L25/03H04L25/02
Inventor 陈晓春曹海燕
Owner MARVELL WORLD TRADE LTD