发明名称 |
Method for transmitting and receiving quadrature amplitude modulation signals, a system for carrying out said method, a machine-readable carrier and the use of a method for synchronously receiving quadrature amplitude modulation signals |
摘要 |
The invention relates to signal transmission. The use of the invention for transmitting and receiving quadrature amplitude modulation signals on unlicensed frequency bands makes it possible to lower a demodulation threshold owing to a low synchronization threshold. The inventive method consists in extending a burst of M m-level quadrature amplitude modulation signals with the aid of two pseudo-random sequences, one of which is periodically inverted in some bursts, thereby making it possible to extract, on a receiving side, the quadrature amplitude modulation signal components corresponding to a meander signal of the pseudo-random sequence inversion (the frequency of which is known). The inventive method is carried out by means of a corresponding system in a hardware and software mode. Moreover, said method can be used for synchronizing the reception of quadrature amplitude modulation signals. |
申请公布号 |
US8208572(B2) |
申请公布日期 |
2012.06.26 |
申请号 |
US20100651518 |
申请日期 |
2010.01.04 |
申请人 |
DOUNAEV IGOR B.;LETUNOV LEONID A.;GRIGORIEV ALEXANDER V. |
发明人 |
DOUNAEV IGOR B.;LETUNOV LEONID A.;GRIGORIEV ALEXANDER V. |
分类号 |
H04L27/36;H04J13/00 |
主分类号 |
H04L27/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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