论文部分内容阅读
1引言在IEEE802.11a标准中定义了一个由两个OFDM符号组成的长训练序列,如图1-1所示。标准建议使用长训练序列完成信道估计和精确频偏估计。使用长训练序列可以为相干解调的所有子载波提供参考幅度和相位。r(n)
1 Introduction In the IEEE802.11a standard defines a long training sequence composed of two OFDM symbols, as shown in Figure 1-1. The standard recommends using long training sequences to complete channel estimation and accurate frequency offset estimation. The use of long training sequences provides reference amplitude and phase for all sub-carriers of the coherent demodulation. r (n)