A low complexity carrier recovery and frequency estimation algorithm for Iridium handset system

Author

Hwang, Syang-Myau ; Yu, Mao ; Yang, Lin

Author_Institution

Cadence Design Syst. Inc., San Jose, CA, USA

fYear

1999

fDate

1999

Firstpage

1208

Abstract

This paper presents a low complexity carrier recovery and frequency estimation algorithm tailored for Iridium satellite communication handset system. The algorithm can acquire carrier frequency from large Doppler offset (larger than symbol rate) in short preamble period and track carrier frequency and phase for the rest of the TDMA slot. It also accurately estimates Doppler offset at the end of the slot. This final Doppler estimation value is further used in upper layer and satellite for Doppler prediction and pre correction. Simulation results show that with at ±37.5 KHz Doppler frequency offset at 4.5 db E_b/N_a, the estimated Doppler frequency error and standard deviation is less than 1 Hz, and 3 Hz, respectively

Keywords

Doppler effect; computational complexity; frequency estimation; mobile satellite communication; synchronisation; time division multiple access; Doppler frequency error; Doppler frequency offset; Doppler prediction; Iridium satellite communication handset system; TDMA slot; carrier frequency; final Doppler estimation value; frequency estimation algorithm; large Doppler offset; low complexity carrier recovery; pre correction; short preamble period; simulation; standard deviation; Algorithm design and analysis; Artificial satellites; Automatic frequency control; Frequency estimation; Low earth orbit satellites; Phase locked loops; Propagation delay; Satellite communication; Signal to noise ratio; Telephone sets;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE

Conference_Location

New Orleans, LA

ISSN

1525-3511

Print_ISBN

0-7803-5668-3

Type

conf

DOI

10.1109/WCNC.1999.796927

Filename

796927