VBaR: Content-sensitive variable GOP length scheme

Author

Liu, Hui ; Kim, Yeong-Sam ; Jang, Seong-Hyun ; Chong, Jong-Wha

Author_Institution

Dept. of Electr. & Comput. Eng., Hanyang Univ., Seoul, South Korea

fYear

2009

fDate

6-8 Nov. 2009

Firstpage

652

Lastpage

655

Abstract

In this paper, we propose a novel automatic gain control (AGC) algorithm as a solution to improve the signal reception performance based on the IEEE 802.15.4a chirp spread spectrum (CSS) over indoor fading channels. The CSS signals are composed of low-band and high-band signals whose frequency characteristics are different because of multipath fading in indoor environment. It is not appropriate to apply only one conventional AGC which regardless of the different bands, where the received signals are contaminated by quantization noise or clipped. The proposed AGC algorithm is based on two AGCs which are designed to be matched well with low-band and high-band signals separately.

Keywords

IEEE standards; automatic gain control; chirp modulation; fading channels; indoor communication; spread spectrum communication; AGC algorithm; IEEE 802.15.4a; chirp spread spectrum; dual-band automatic gain control algorithm; high-band signals; indoor fading channels; low-band signals; multipath fading; signal reception performance; Cascading style sheets; Chirp; Fading; Frequency; Gain control; Indoor environments; Quantization; Signal design; Spread spectrum communication; Working environment noise; browsing behavior; corner detection; shot detection; variable group of picture (GOP); video analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Network Infrastructure and Digital Content, 2009. IC-NIDC 2009. IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-4898-2

Electronic_ISBN

978-1-4244-4900-6

Type

conf

DOI

10.1109/ICNIDC.2009.5360915

Filename

5360915