公开(公告)号：US20150138995A1

公开(公告)日：2015-05-21

申请号：US14082785

申请日：2013-11-18

Applicant: Texas Instruments Incorporated

Inventor： Shankar Ram NarayanaMoorthy ,  Ganesan Thiagarajan ,  Subhashish Mukherjee

IPC: H04W24/02 ,  H04L5/00

CPC classification number: H04W24/02 ,  H04L5/0048 ,  H04L27/0014 ,  H04L27/34 ,  H04L2027/0016 ,  H04L2027/0087

Abstract: According to an aspect of the present disclosure, a baseband signal and a pilot signal are combined for a transmission. The combined signal is then translated to higher frequency band by mixing a local oscillator signal and the combined signal. On the receiver, the pilot signal is used to remove the phase noise in the baseband signal, as both baseband signal and the pilot signal are affected/modified by substantially the same phase noise. In one embodiment, the pilot signal may be selected either centered outside the bandwidth of the base band signal or centered inside the bandwidth of the base band signal with enough guard band around it so that it can be filtered out using filters. The pilot signal is used in a similar fashion to eliminate the effect of the phase noise introduced by the local oscillator present in the tester in testing the receiver device.

Abstract translation: 根据本公开的一个方面，组合基带信号和导频信号用于传输。 然后通过混合本地振荡器信号和组合信号将组合的信号转换到更高的频带。 在接收机上，导频信号用于去除基带信号中的相位噪声，因为基带信号和导频信号都受到基本上相同的相位噪声的影响/修改。 在一个实施例中，导频信号可以选择在基带信号的带宽之外的中心，或者位于基带信号的带宽内，其周围具有足够的保护带，使得可以使用滤波器滤除导频信号。 导频信号以类似的方式使用，以消除在测试接收机设备中存在于测试仪中的本地振荡器引入的相位噪声的影响。