Method and apparatus for estimating the phase of a signal
US6891362B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2001 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Nov 19, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/7117
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An input signal is a complex vector whose phase is a coherent measurement of the phase rotation occurring between two separated symbols of a received CDMA signal. A processing block (30) provides a first signal showing the magnitude and the sign of the imaginary part of the input signal, and a second signal showing the magnitude and sign of the real part of the input signal to an initialisation block (31). A quadrant determination block (32) examines the signs of the signals to determine the quadrant in which the phase of the input signal exists. A comparator block (33) determines if the magnitude of the first signal is greater than or equal to the magnitude of the second signal. If a negative determination is made, the magnitude of the first signal is doubled in a multiplication block (35) to form a multiplied signal, and a counter incremented, initially from zero. The comparator block (33) then determines if the multiplied signal is greater than or equal to the magnitude of the second signal. This continues until the multiplied signal is equal to or exceeds the magnitude of the second signal. Carried to an upscaling block (36) is the multiplied signal (or the first signal if ther…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.