公开(公告)号：US20040264432A1

公开(公告)日：2004-12-30

申请号：US10809898

申请日：2004-03-26

Applicant: Renesas Technology Corp.

Inventor： Toyokazu Hori ,  Hiroshi Nogami ,  Toshihito Habuka ,  Naoto Inokawa ,  Kazuyuki Takada

IPC: H04J001/00

CPC classification number: H04L25/061 ,  H04L27/2657 ,  H04L27/2675 ,  H04L27/2679

Abstract: The invention comprises: processing for receiving an OFDM packet having a preamble and the following data transmission symbol, in which packet the subcarrier interval of the preamble is set wider than that of the data transmission symbol; processing for estimating a DC offset occurring at a receiving side by using the received preamble; processing for correcting the DC offset on the received data transmission symbol, according to the estimation result of the DC offset; and processing for demodulating the DC offset corrected data transmission symbol. Thus, it is possible to estimate a DC offset and then correct the DC offset according to the estimated value, in the OFDM packet with no nul symbol defined there.

Abstract translation: 本发明包括：接收具有前同步码和后续数据传输符号的OFDM分组的处理，其中前导码的子载波间隔被设置为比数据传输符号的子载波间隔宽; 用于通过使用所接收的前导码来估计在接收侧发生的DC偏移的处理; 根据直流偏移的估计结果对接收到的数据传输符号校正直流偏移的处理; 以及用于解调DC偏移校正数据传输符号的处理。 因此，可以估计DC偏移，然后根据估计值在没有nul符号的OFDM分组中校正DC偏移。