| 发明名称 | DC correction for accurate detection of pulses | ||
| 摘要 | Techniques are presented herein for distinguishing between the DC component of a real signal and DC energy of a received signal due to the radio receiver circuitry. Samples are obtained of a received signal derived from output of a receiver of a communication device. A mean of the samples is computed over a sample window comprising a predetermined number of samples. First and second thresholds are provided, the first threshold being greater than the second threshold. An absolute value of the mean is compared with respect to the first threshold and the second threshold as samples are obtained in the sample window. A selection is made between the first threshold and the second threshold for purposes of comparison with the absolute value of the mean to determine whether energy at DC is a true/real DC component of the received signal or is due to circuitry of the receiver. | ||
| 申请公布号 | US9143370(B2) | 申请公布日期 | 2015.09.22 |
| 申请号 | US201314037807 | 申请日期 | 2013.09.26 |
| 申请人 | Cisco Technology, Inc. | 发明人 | Gao Zhigang;Rangarajan Raghuram;Kloper David |
| 分类号 | H04B15/00;H04L25/06 | 主分类号 | H04B15/00 |
| 代理机构 | Edell, Shapiro & Finnan, LLC | 代理人 | Edell, Shapiro & Finnan, LLC |
| 主权项 | 1. A method comprising: obtaining samples of a received signal derived from output of a receiver of a communication device; computing a mean of the samples over a sample window comprising a predetermined number of samples; providing first and second thresholds, the first threshold being greater than the second threshold; comparing an absolute value of the mean with respect to the first threshold and the second threshold as samples are obtained in the sample window; and selecting either the first threshold or the second threshold for purposes of comparison with the absolute value of the mean to determine whether energy at direct current (DC) is a DC component of the received signal or is due to circuitry of the receiver. | ||
| 地址 | San Jose CA US | ||