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

Method and apparatus for channel and noise estimation

A channel estimation and noise estimation technology, applied to the shaping network in the transmitter/receiver, baseband system components, preventing/detecting errors through diversity reception, etc., can solve problems such as data loss and distortion

Active Publication Date: 2009-01-14
QUALCOMM INC
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The data stream is distorted by the propagation environment and further degraded by noise

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 and apparatus for channel and noise estimation
  • Method and apparatus for channel and noise estimation
  • Method and apparatus for channel and noise estimation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Here, the word "exemplary" is used to mean serving as an "example, illustration, or illustration." Any embodiment described as "exemplary" herein is not necessarily construed as more preferred or advantageous than other embodiments.

[0022] The channel and noise estimation techniques described in this article can be used in various communication systems, such as code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal FDMA (OFDMA) System, single carrier FDMA (SC-FDMA) system, etc. The CDMA system can implement one or more radio technologies, such as wideband CDMA (W-CDMA), cdma2000, and so on. cdma2000 covers IS-2000, IS-856 and IS-95 standards. The TDMA system can implement radio technologies such as, for example, the Global System for Mobile Communications (GSM). The various radio technologies and standards are already known in this technology. W-CDMA and GSM are described in...

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

Techniques for performing channel and noise estimation for a MIMO transmission sent from multiple transmit antennas to multiple receive antennas are described. Samples are obtained from the receive antennas. For a first scheme, channel estimates are derived by correlating the samples with at least one pilot sequence, and signal, noise and interference statistics are also estimated based on the samples. For a second scheme, total received energy as well as signal and interference energy are estimated based on the samples. Noise is then estimated based on the estimated total received energy andthe estimated signal and interference energy. For a third scheme, signal and on-time interference statistics are estimated based on the samples. Noise and multipath interference statistics are also estimated based on the samples. Signal, noise and interference statistics are then estimated based on the estimated signal and on-time interference statistics and the estimated noise and multipath interference statistics.

Description

[0001] Claim priority according to 35U.S.C.§119 [0002] This patent application claims priority over the provisional application filed on October 28, 2005, entitled "METHOD AND APPARATUS FOR SPACE-TIMEEQUALIZATION IN WIRELESS COMMUNICATIONS" No. 60 / No. 731,423, which is assigned to the assignee of the present invention, and is expressly incorporated herein by reference. Technical field [0003] The present disclosure relates generally to communications, and more specifically to techniques for performing channel and noise estimation for multiple-input multiple-output (MIMO) transmissions. Background technique [0004] MIMO transmission is a transmission from multiple (T) transmitting antennas to multiple (R) receiving antennas. For example, the transmitter can simultaneously transmit T data streams from T transmission antennas. The data stream is distorted due to the propagation environment and further degraded due to noise. The receiver receives the transmitted data stream via...

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 Applications(China)
IPC IPC(8): H04L1/06H04L25/03H04L25/02
Inventor 金炳勋
Owner QUALCOMM INC