| 摘要 |
This invention is about a method and apparatus for wireless transceiver to send and receive data packets with high data rate. The apparatus may include a base-band processor using OFDM (Orthogonal Frequency Division Multiplexing). The orthogonal nature of the OFDM sub-channels allows them to be overlapped, there by increasing the spectral efficiency. In other words, as orthogonality is maintained, there will be no inter-channel interference in an OFDM system. In any real implementation, however, frequency offset tracking and recovery, phase error estimation and compensation etc.; several factors will cause a certain loss in orthgonality. Designing a system that will minimize these losses therefore becomes a major technical focus. In this invention, synchronization, channel estimation and FEC techniques are suggested to have better performance in the radio channel environment. The algorithm and method for coarse and fine frequency offset compensation, and symbol timing synchronization in the synchronization part of OFDM receiver are included. The apparatus may include channel estimation method with LS (Least Square) algorithm and channel decoder with CSI (Channel State Information).
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