When a packet is transmitted using orthogonal frequency-division multiplexing (OFDM) transmission in IEEE 802.11ad, channel frequency responses (CFR) cannot be fully estimated using the common preamble of a packet, because the bandwidth of the estimated CFR using the common preamble is narrower than that of the data-field of OFDM transmissions. This study presents a channel estimation method that can be practically applied for highly modulated OFDM transmissions in IEEE 802.11ad. To estimate frequency components of the CFR that cannot be estimated using the channel estimation field in the packet preamble, we utilize a regenerated header that is constructed from decoded header information. By comparing the received and regenerated headers, the CFR components that are insufficiently estimated are fully estimated. To demonstrate the effectiveness of our method, link-level simulations were conducted using the modulation and coding scheme (MCS) that shows the highest throughput among the MCSs for OFDM transmission in IEEE 802.11ad. The simulation results show that when the proposed method is used, the increase in the required signal-to-noise ratio for a 1% packet-error-rate is less than 2 dB.

当在IEEE 802.11ad中使用正交频分复用（OFDM）传输来传输数据包时，无法使用数据包的公共前导码来完全估计信道频率响应（CFR），因为使用公共前导码来估计CFR的带宽是比OFDM传输的数据域更窄。这项研究提出了一种信道估计方法，该方法可以实际应用于IEEE 802.11ad中的高调制OFDM传输。为了估计无法使用数据包前导中的信道估计字段估计的CFR的频率分量，我们利用了根据已解码的标头信息构建的再生标头。通过比较接收到的和重新生成的报头，可以充分估计出估计不足的CFR分量。为了证明我们方法的有效性，使用调制和编码方案（MCS）进行了链路级仿真，该方案显示了IEEE 802.11ad中用于OFDM传输的MCS中最高的吞吐量。仿真结果表明，当使用所提出的方法时，对于1％的包错误率，所需的信噪比的增加小于2 dB。