A study on the effects of soft interference cancellation for uplink WCDMA system

WCDMA system is an interference limited system. Interference cancellation (IC) is a technique that has been widely studied and implemented for WCDMA uplink system to achieve performance close to potential capacity. Most studies until now have been focused on hard interference cancellation. Hard IC occurs after each user has its cyclic redundancy check (CRC) passed, meaning it would not perform cancellation until the end of a transmission time interval (TTI), therefore causing potential delays in cancellation. Recently engineers have proposed a soft IC scheme where one would perform cancellation without passing CRC, therefore one would not have as much delay on cancellation but at the cost of lower cancellation efficiency because of bad estimation on signals. In my thesis I will attempt to build a framework that gives some insight to the tradeoff between hard and soft IC to serve as a reference for engineers when implementing IC into our WCDMA systems.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2011

Author dc:creator

• Qi, Tianren

Advisor dc:contributor.advisor

• Lizhong Zheng, Mingxi Fan, Yisheng Xue and Jiye Liang.

• Electrical Engineering and Computer Science.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/66455

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/66455