Fine Frequency Offset based Section Synchronization in Cognitive Radio Systems

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

An Efficient Frequency Offset Estimator for Timing and Frequency Synchronization in OFDM Systems

ABSTRACT: In this paper, by modifying a conventional method which requires two training symbols, we propose a timing and frequency synchronization algorithm for OFDM systems which requires one training symbol. While the frame/symbol timing is obtained by using the conventional method, the carrier frequency offset is efficiently estimated by the proposed method. Key features of the proposed meth...

متن کامل

Adaptive power and frequency allocation strategies in cognitive radio systems

This doctoral thesis comprises a summary of novel results considering (1) channel selection in a cognitive radio system (CRS) using history information and (2) power allocation in a selected frequency band assuming a fading channel. Both can be seen as methods to manage interference between in-system users as well as to the users of other systems operating in the same geographical area and freq...

متن کامل

Frequency Offset Estimation in OFDM Systems using Threshold based Scheme

The Performance of the Orthogonal Frequency Division Multiplexing (OFDM) systems degrade due to Doppler frequency or frequency drift between transmitter and receiver oscillator which causes frequency offset and hence leads to a number of impairments in the received signal, thereby making its detection incorrect. In this paper, a threshold-based frequency offset estimation algorithm for orthogon...

متن کامل

A Wavelet Packet Based Frequency Offset Estimation in Ofdm Systems

This paper deals with frequency offset estimation in OFDM systems. The proposed approach is based on adapted wavelet packet decomposition of the shifted received signal. The binary tree is optimized, in iterative manner, according to a comparison between decomposed signals energy. The proposed approach is characterized by small number of iterations, short wavelet packet filters and robustness a...

متن کامل

Pilot-Based Carrier Frequency Offset Estimation in OFDM Systems

The ability of OFDM to mitigate channel frequency selectivity is impaired by its vulnerability to carrier frequency offset (CFO). In this paper, a new pilot-based canier frequency offset estimation scheme for frequency selective slowly-varying channels is proposed. This scheme exploits the inherent redundancy introduced by the OFDM signaling and no additional training symbol is needed. The sync...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: International Journal of Computer Applications

سال: 2014

ISSN: 0975-8887

DOI: 10.5120/19007-0560