Title :
The Impact of RF-Impairments and Automatic Gain Control on UMTS-HSDPA-Throughput Performance
Author :
Stuhlberger, Rainer ; Maurer, Linus ; Hueber, Gernot ; Springer, Andreas
Author_Institution :
Inst. for Commun. & Inf. Eng., Univ. of Linz, Linz
Abstract :
This paper presents radio frequency (RF)-receiver investigations related to UMTS-HSDPA throughput performance (TP). The investigated concept is based on a direct conversion receiver (DCR) architecture enhanced with a digital-front-end (DFE). Due to the use of a DFE some analog requirements decrease on the expense of a tightened ADC specification and a more complex digital signal processing chain. To efficiently use the whole dynamic range of the ADC under all operating conditions requires a smart automatic gain control (AGC) strategy for the analog gain stages. The effects of different ADC levels on the TP performance are investigated in detail. Based on these results a smart leveling strategy is developed. TP results including the proposed AGC-method are presented for the ITU-channel models PA3, PB3, and VA120.
Keywords :
3G mobile communication; automatic gain control; radio receivers; ITU-channel; RF-impairments; UMTS-HSDPA; automatic gain control; digital-front-end; direct conversion receiver; radiofrequency receiver; throughput performance; 3G mobile communication; Automatic control; Digital signal processing; Downlink; Gain control; Multiaccess communication; Radio frequency; Radiofrequency integrated circuits; Receivers; Throughput;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
DOI :
10.1109/VTCF.2006.389
