Erasure detection for a transport channel with an unknown format

A technology that has been erased and detected, used in the field of communications, and can solve problems such as difficulty in accurately determining

Inactive Publication Date: 2008-03-19
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because it may be difficult to accurately determine the true status of each received block on this transport channel, i.e. whether the received block is a good block, a DTX block, or a bad block

Method used

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  • Erasure detection for a transport channel with an unknown format
  • Erasure detection for a transport channel with an unknown format
  • Erasure detection for a transport channel with an unknown format

Examples

Experimental program
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Embodiment Construction

[0022] As used herein, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation or design referred to herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations or designs.

[0023] FIG. 1 shows a wireless communication system 100 . System 100 includes a plurality of base stations 110 that provide communication coverage for a plurality of wireless devices 120 . A base station is typically a fixed station that can communicate with wireless devices and may also be called a Node B, base transceiver system (BTS), access point or some other terminology. A wireless device may be a fixed device or a mobile device and may also be called User Equipment (UE), Mobile Station (MS), user terminal, handset, subscription unit or some other terminology. A wireless device may communicate with one or more base stations on the downlink and / or with one or more base stations on the uplink at ...

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Abstract

To perform erasure detection for an intermittently active transport channel with unknown format, a receiver determines an energy metric and a symbol error rate (SER) for a received block with CRC failure. The receiver computes uncorrelated random variables u and v for the received block based on the energy metric and SER, the estimated means and standard deviations of the energy metric and SER, and a correlation coefficient indicative of the correlation between the energy metric and SER. The receiver then evaluates the uncorrelated random variables u and v based on at least one decision criterion and declares the received block to be an erased block or a DTX block based on the result of the evaluation. The decision criterion may be defined based on a target probability of false alarm and adjusted based on another metric, such as a zero state bit, for the received block.

Description

technical field [0001] This disclosure relates generally to communications, and more specifically, to techniques for performing erasure detection in wireless communication systems. Background technique [0002] In a wireless communication system, a wireless device, such as a cellular telephone, communicates with one or more base stations through transmissions on the downlink and uplink. The downlink (or forward link) refers to the communication link from the base station to the wireless device, and the uplink (or reverse link) refers to the communication link from the wireless device to the base station. In a Code Division Multiple Access (CDMA) system, a base station can transmit data to multiple wireless devices simultaneously. The total transmit power available at a base station determines the downlink capacity of said base station. Each active wireless device is allocated a portion of the total transmit power such that the aggregate transmit power for all active wirele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B7/005H04B1/707H04J13/00H04W52/12H04W52/18H04W52/20H04W52/24H04W52/44
CPCH04W52/44H04L1/201H04B1/7172H04W52/18H04W52/20H04W52/24H04W52/12H04L1/208H04L1/20H04W76/28H04W24/00H04L1/004H04L1/0091
Inventor 阿伦·维斯瓦纳坦阿米特·布塔拉帕瓦塔纳坦·苏布拉马尼亚
Owner QUALCOMM INC
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