Title :
A CQI Adjustment Scheme for HSDPA System
Author :
Zhang, Zhonghao ; Tang, Guanyu ; Chang, Yongyu ; Yang, Dacheng
Author_Institution :
Sch. of Telecommun. Eng., Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
Channel quality indication (CQI) is directly related to the accuracy of AMC (adaptive modulation and coding) and the performance of HSDPA (high speed downlink packet access). There will be feedback-delay if we consider the CQI in current specification. In this paper, we propose a novel CQI adjustment scheme, which makes use of the power control information of DPCH (dedicated physical channel) updated from UE (user equipment), to improve the veracity of the feedback information, so as to improve the throughput of the system. Simulation shows that our proposed scheme performs more precisely than the conventional one.
Keywords :
3G mobile communication; adaptive codes; adaptive modulation; channel coding; packet radio networks; wireless channels; CQI adjustment scheme; HSDPA system; adaptive modulation-coding; channel quality indication; dedicated physical channel; feedback information; high speed downlink packet access; power control information; user equipment; Channel estimation; Delay; Downlink; Feedback; Modulation coding; Multiaccess communication; Power control; Scheduling; Throughput; Time division synchronous code division multiple access;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC Spring 2008. IEEE
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-1644-8
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2008.338
