公开(公告)号：US06731710B1

公开(公告)日：2004-05-04

申请号：US09162996

申请日：1998-09-30

Applicant: Michael Joshua Genossar ,  Max Gotman ,  Natan Mizrahi ,  Naftali Chayat

Inventor： Michael Joshua Genossar ,  Max Gotman ,  Natan Mizrahi ,  Naftali Chayat

IPC: H04L704

CPC classification number: H04L27/22

Abstract: A modem for more efficiently processing a received analog signal into a digital output. The modem preferably estimates the carrier frequency offset in at least one stage, by receiving a synchronization field divided into at least two portions, calculating a difference of the phase between the portions, and then calculating the frequency offset from the phase difference. More preferably, the modem estimates the carrier frequency offset in two stages, with a first stage being a initial frequency estimate of the offset.

Abstract translation: 用于将接收的模拟信号更有效地处理成数字输出的调制解调器。 调制解调器优选地通过接收分成至少两个部分的同步字段来计算至少一个级中的载波频率偏移，计算该部分之间的相位差，然后计算相位差的频率偏移。 更优选地，调制解调器在两级中估计载波频率偏移，其中第一级是偏移的初始频率估计。

公开(公告)号：US06643321B1

公开(公告)日：2003-11-04

申请号：US09162995

申请日：1998-09-30

Applicant: Michael Joshua Genossar ,  Natan Mizrahi ,  Max Gotman ,  Naftali Chayat

Inventor： Michael Joshua Genossar ,  Natan Mizrahi ,  Max Gotman ,  Naftali Chayat

IPC: H04B138

CPC classification number: H04L25/03038 ,  H04L27/2273 ,  H04L2025/03477 ,  H04L2025/03617 ,  H04L2025/03668 ,  H04L2027/0028 ,  H04L2027/0046 ,  H04L2027/0067 ,  H04L2027/0069

Abstract: A modem for more efficiently processing a received analog signal into a digital output. The modem preferably features an adaptive equalizer with coefficients which are saved and reused for processing of subsequent analog signals, in order to reduce the time required to reach convergence. In addition, preferably the modem features an automatic carrier frequency control which adjusts the sampled digital signal according to both the carrier phase offset and the carrier frequency offset. Again, in order to process the signal more quickly and efficiently, preferably the carrier frequency offset is stored and reused for processing subsequent signals.

Abstract translation: 用于将接收的模拟信号更有效地处理成数字输出的调制解调器。 调制解调器优选地具有自适应均衡器，其具有被保存和重新用于后续模拟信号的处理的系数，以便减少达到收敛所需的时间。 此外，优选地，调制解调器具有自动载波频率控制，其根据载波相位偏移和载波频率偏移来调整采样的数字信号。 再次，为了更快速和有效地处理信号，优选地，载波频率偏移被存储并重新用于处理后续信号。