Timing Synchronization Techniques in Wireless Ofdm Systems Computer Science Essay
Abstract. To combat frequency-selective fading, OFDM technology was developed and widely used in wireless communications. The principle of OFDM is described in this chapter. Carrier Frequency Offset CFO, one of the challenges in OFDM systems is discussed. The Orthogonal Frequency Division Multiple Access, OFDMA, Orthogonal Frequency Division Multiplexing, OFDM systems are very sensitive to synchronization errors. We introduce an algorithm for the blind estimation of symbol timing and carrier frequency. 4. View a full list of advantages and disadvantages of an OFDM system here. 5. Due to the specific waveform structure, the impact of timing errors is not as pronounced in OFDM as in single. A robust symbol timing and carrier frequency synchronization scheme applicable to orthogonal frequency division multiplexing systems is presented, and a new performance measure for timing estimation based on the plot of the signal-to-timing error-induced average interference power ratio versus offset is introduced. of the timing estimate; A robust and efficient technique is presented for frame symbol timing and carrier frequency synchronization in OFDM systems. It uses a preamble consisting of only one training symbol with two. An algorithm is introduced for the blind estimation of symbol timing and carrier frequency offset in wireless OFDM systems, and the use of different subcarrier transmit powers and periodic transmitter precoding to achieve a carrier frequency acquisition range of the entire bandwidth of the OFDM signal, and a symbol timing acquisition range from Chung et al. 28 developed new CAZAC and near-CAZAC sequences to enable robust fine timing and frequency synchronization, giving OFDM preamble waveforms a compact spectrum and low peak-to-average envelope power ratio PMEPR got. In the same year, Lin et al. 29 proposed a new near-CAZAC,