Related Papers
Timing and Carrier Synchronization in Wireless Communication Systems: A Survey and Classification of Research in the Last Five Years
Steven Blostein
Timing and carrier synchronization is a fundamental requirement for any wireless communication system to work properly. Timing synchronization is the process by which a receiver node determines the correct instants of time at which to sample the incoming signal. Carrier synchronization is the process by which a receiver adapts the frequency and phase of its local carrier oscillator with those of the received signal. In this paper, we survey the literature over the last five years (2010-2014) and present a comprehensive literature review and classification of the recent research progress in achieving timing and carrier synchronization in single-input-single-output (SISO), multiple-input-multiple-output (MIMO), cooperative relaying, and multiuser/multicell interference networks. Considering both single-carrier and multi-carrier communication systems, we survey and categorise the timing and carrier synchronization techniques proposed for the different communication systems focusing on ...
Symbol timing synchronization in software radio receivers
2004 •
keith nolan
A Novel Timing and Frequency Synchronization Technology for OFDM System
博 王
Timing and carrier recovery techniques in DSP based digital receivers
1994 •
Shruti Sheth
In conventional receivers, carrier recovery and timing recovery are performed in the analog domain by controlling the frequency and phase of voltage controlled oscillators (VCO) in their respective phase locked loop (PLL). When the control signal for these loops are generated in the sampled data domain by DSP techniques the digital samples must be brought to the analog domain by a pair of digital-to-analog converters (DAC). It is more cost effective to perform the entire signal processing function of the PLL in the digital domain and avoid the cost of the DAC and analog smoothing filter in the processing loops. In the full DSP implementation the receiver performs an initial complex down conversion with an asynchronous local oscillator set to the nominal final conversion frequency and then absorbs the residual carrier and phase uncertainty by data dependent control of a digital complex rotator. In a similar fashion sample timing is performed by the sampling the input signal with an asynchronous sampling clock operating at nominally twice the symbol rate and then absorbs residual frequency and phase of the sampling clock by resampling the data with a polyphase filter bank
2010 2nd International Conference on Future Computer and Communication
Performance of coarse and fine timing synchronization in OFDM receivers
2010 •
Sattar Mirzakuchaki
Time and Frequency Synchronization in OFDM System
2014 •
SRUTI SINGH
Orthogonal frequency division multiplexing (OFDM) is one of the multicarrier modulation techniques, which transmits data in very high rate and efficiently mitigates the effects of multipath distortions as well as loss in bandwidth efficiency. However, OFDM systems are very sensitive towards synchronization error. Synchronization of an OFDM signal is required to find the symbol timing and carrier frequency offset (CFO). Before demodulation of subcarriers, either from explicit training data or using cyclic prefix of the OFDM signal we can get synchronization at receiver. After demodulation of the OFDM subcarriers, information about the synchronization can be obtained from training symbols embedded into the regular data symbol pattern. The estimation of synchronization error can be performed depending on the type of the training data. In this paper, it is focused on preamble based training data following IEEE802.11a preamble structure of the WLAN system and cyclic prefix based training...
European Transactions on Telecommunications
New joint frame synchronisation and carrier frequency offset estimation method for OFDM systems
2009 •
Chintha Tellambura, Zhongshan Zhang
International Journal of Engineering Research and Technology (IJERT)
IJERT-A Comparative Study of Costas Loop and DPLL for Carrier Synchronization
2014 •
IJERT Journal
https://www.ijert.org/a-comparative-study-of-costas-loop-and-dpll-for-carrier-synchronization https://www.ijert.org/research/a-comparative-study-of-costas-loop-and-dpll-for-carrier-synchronization-IJERTV3IS071263.pdf This paper presents comparison of a simple costas loop and DPLL for carrier recovery. Synchronization is basically the process of frequency and phase aligning of remote oscillators. The first task is carrier acquisition which includes forming a frequency and phase-matched replica of the local oscillator for the process of down conversion. A local oscillator in detector is forced to oscillate in both phase and frequency with respect to the carrier oscillator at the transmitter. Timing recovery is the second task focused on collecting a set of aligned input samples time and the replica template. The presence of carrier phase error causes signal to rotate. For larger rotation, the symbol signal space projections lie in a wrong decision region. Hence there occurs a decision error even if a perfect timing recovery scheme is applied for zero additive noise. Carrier synchronization aims to detect the phase of carrier. Simulation results are presented for evaluating the behavior of costas loop and DPLL.
IEEE Transactions on Broadcasting
A spread-spectrum based synchronization technique for digital broadcast systems
1990 •
trevor holden
Frame Synchronization in Digital Communication Systems
QUEST JOURNALS
This paper introduces the problem of frame synchronization in digital communication receiver and evaluates the performance of using different sequences for frame synchronization such as Barker, Neuman-Hofman and PN sequences. In this work we use a correlation rule based method where the receiver, after recovering phase value, the given input values are correlated with a sync pattern (marker) and the frame synchronization is obtained by examining the correlation values. Computer simulation is made by using MATLAB-SIMULINK program and the results show that the correlation rule based method has acceptable performance and implementation simplicity.
