An Enhanced Automatic Gain Control Algorithm for Initial Cell Search in 3GPP LTE TDD System
スポンサーリンク
概要
- 論文の詳細を見る
In this paper, we propose an AGC (Automatic Gain Control) algorithm for initial cell search in 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) TDD (Time Division Duplex) system. Since the received signal has a large signal power difference between uplink and downlink subframe in wireless communication systems using a TDD scheme, conventional AGC scheme cannot sufficiently adjust the AGC gain because the AGC gain cannot converge fast enough to properly respond. Therefore, conventional AGC scheme leads to increased AGC gain variation, and the received signal will be attenuated by large AGC gain variation. To overcome this limitation, we propose an AGC scheme based on the average amplitude ratio calculation which can not only effectively increase convergence speed of the AGC gain but also maintain the stability of AGC operation in LTE TDD system. Also, it is important for AGC to converge efficiently for the accurate radio frame timing detection during the subsequent initial cell search procedure. Therefore, we also consider the proposed AGC scheme in combination with PSS (Primary Synchronization Signal) detection interface for the first step of initial cell search process in LTE TDD system to obtain both a stable AGC operation and accurate PSS detection performance. By extensive computer simulation in the presence of frequency offset and various channel environments, we verified that the proposed method can obtain a good behavior in terms of demodulation and PSS detection performance in LTE TDD system.
- 2010-12-01
著者
-
Choi Hyung-jin
School Of Information And Communication Engineering Sungkyunkwan University
-
Jang Jun-hee
School Of Information And Communication Engineering Sungkyunkwan University
-
Kim Keun-dea
School Of Information And Communication Engineering Sungkyunkwan University
関連論文
- A Robust Timing Synchronization Algorithm for OFDM Systems over Multipath Rayleigh Fading Channels(Papers Selected from 2005 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2005))
- A Low-Complexity Frequency Offset Insensitive Detection for 2.45GHz LR-WPAN
- Iterative Receiver with Enhanced Spatial Covariance Matrix Estimation in Asynchronous Interference Environment for 3GPP LTE MIMO-OFDMA System
- Robust SIR Measurement Algorithm with Closed Loop Power Control in High Speed Mobile Channel Environment(Transmission Systems and Transmission Equipment for Communications)
- Design of High-Speed Preamble Searcher for RACH Preamble Structure in WCDMA Reverse Link Receiver(Transmission Systems and Transmission Equipment for Communications)
- An Enhanced Automatic Gain Control Algorithm for Initial Cell Search in 3GPP LTE TDD System
- A Velocity Estimation-Based Channel Estimator for WCDMA Forward Link Receiver(Transmission Systems and Transmission Equipment for Communications)
- Channel Estimation Based on Trigonometric Polynomial Approximation in OFDM Systems with Transmit Diversity(Wireless Communication Technology)
- Performance Analysis of Channel Estimators for Forward Link W-CDMA under Multipath Rayleigh Fading Channels
- The Modified CP-AFC with Multi-Stage Tracking Mode for WCDMA Reverse Link Receiver(Special Section on Papers Selected from ITC-CSCC 2002)
- An Enhanced Observed Time Difference of Arrival Based Positioning Method for 3GPP LTE System