Yu-ting Sun

  • Citations Per Year
Learn More
Orthogonal frequency division multiplexing (OFDM) is a very promising technique for high data rate transmission in multipath channels. In general, the achievable data rate of an OFDM system is confined by the available bandwidth, which strongly depends on the spectrum policy. Carrier aggregation is an attractive and flexible bandwidth extension technique(More)
A novel estimation technique of timing delay and frequency offset that takes advantage of a dual-chirp signal is proposed and investigated in this paper. The proposed technique can be implemented with low hardware or computational complexity by using fully-digital circuitry or a digital signal processor (DSP). In addition, it can achieve sufficiently low(More)
Recently, orthogonal frequency division multiplexing (OFDM) techniques have received great interest in wireless communications for their high speed data transmission. OFDM improves robustness against narrowband interference or severely frequency-selective channel fades caused by long multipath delay spreads and impulsive noise. A single fade or interferer(More)
Orthogonal frequency-division multiplexing (OFDM) communication is a promising technique for use in fourth-generation (4G) mobile communications. Meanwhile, the carrier aggregation technique becomes crucial for raising the transmission rate. The achievable data rate of an OFDM system is generally limited by spectral efficiency and the available bandwidth;(More)
In wireless sensor networks, balanced energy dissipation is crucial to achieving satisfactory network lifetime. Since all data packets usually have to be forwarded to the base station via multi-hop routing, the traffic pattern is highly non-uniform, putting a high burden on the sensor nodes close to the base station. This paper proposes novel centralized(More)
  • 1