Sidelobe cancellation and diversity reception using a single array of auxiliary antennas
US5369412A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1993 |
| Grant date | Nov 29, 1994 |
| Priority date | — |
| Expiry date | Dec 14, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/2629
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a sidelobe canceller, a main channel multiplier (11) operates on the baseband output signal of a main antenna (10) with a weight signal to produce a weighted main channel signal. The baseband output signals of auxiliary antennas (16.sub.1 .about.16.sub.n) are adaptively weighted so that the auxiliary antennas have a first directivity pattern (44) whose main lobe oriented toward an undesired signal and summed together to produce a first sum signal (y.sub.s), and further adaptively weighted so that the auxiliary antennas have a second directivity pattern (45) whose main lobe is oriented toward a desired signal, and summed together to produce a second sum signal (y.sub.d). The second sum signal (y.sub.d) is summed with the weighted main channel signal to produce a diversity combined signal (y.sub.c), and the first sum signal (y.sub.s) is subtracted from the diversity combined signal (y.sub.c) to produce a sidelobe cancelled signal (y.sub.z). An adaptive equalizer (14) is provided for removing intersymbol interference from the sidelobe cancelled signal (y.sub.z). The main channel weight signal is derived by correlating the output of the adaptive equalizer with the output of the main…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.