A Synchronization and Cell Searching Technique Using Pilot Tones for OFDM Cellular Systems
نویسندگان
چکیده
In this letter, a pilot structure and an efficient algorithm for downlink synchronization and cell searching in OFDM-based cellular systems are proposed. The pilots, randomly allocated in the frequency domain, allow us to minimize inter-cell interference (ICI) as well as to increase cell searching capability, estimation range of integer carrier frequency offset (CFO), and estimation accuracy of symbol timing offset (STO). The proposed low-complexity joint algorithm for integer CFO estimation, cell searching, and downlink detection is robust to ICI, multipath channel, STO and fine CFO. key words: OFDM, synchronization, cell searching, pilot, downlink detection
منابع مشابه
Pilot Assisted Synchronization for Wireless Ofdm Systems over Fast Time Varying Fading Channels
This paper presents a frequency synchronization technique for wireless OFDM communication systems over fast time varying channels. The overall method, known as loop-timing, can be used to synchronize multiple mobile transceivers with a base-station. In this method, the mobiles first achieve downlink synchronization and subsequently derive their uplink timing reference from the recovered downlin...
متن کاملA Preamble-Based Cell Searching Technique for OFDM Cellular Systems
In this paper, a novel preamble structure, including a synchronization field (S-field) and a cell searching field (C-field), is proposed. An efficient algorithm for downlink synchronization and cell searching using the preamble is also proposed. The synchronization process includes initial symbol timing estimation using continuously or at least periodically transmitted downlink signal, frame de...
متن کاملSynchronization for Ofdm-based Communication System: a Brief Overview
The goal of current paper is to provide an overview of all synchronization tasks to be performed in orthogonal frequency – division multiplexing (OFDM) based communication system. Symbol timing and frequency synchronization solutions in systems with cyclic prefix (CP) are described. Basic channel estimation and equalization based on pilot tones is described and simulation results presented. Alt...
متن کاملIssues on Broadband Wireless Communication Systems: Channel Estimation, Frequency Synchronization and Space-Time-Frequency Coding
“Faster, higher, stronger”– the Olympic motto is being pursued and practised in the design of broadband wireless communication systems. Motivated by the huge demands for fast and reliable communications over wireless channels, broadband communication systems are required to provide faster (lowcomplexity) data processing, higher data throughput and stronger (lower error rate) performance. In pra...
متن کاملIncreasing the Performance of OFDM Systems by PAPR Reduction in PTS Technique using Election Optimization Algorithm
Orthogonal Frequency Division Multiplexing (OFDM) is a useful technology in wireless communications that provides high-rate data transmission in multipath fading channels. The advantages of OFDM systems are the high spectral efficiency and strong resistance to frequency selective fading. In OFDM systems, a large number of sub-carriers are used to modulate the symbols causing the time-domain OFD...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- IEICE Transactions
دوره 89-B شماره
صفحات -
تاریخ انتشار 2006