Noise code string generator and CN controller comprising it
US6590462B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 2001 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Jun 22, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/244
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a noise sequence generator, a plurality of memories store plural types of noise sequences that are non-correlated with each other, respectively. A noise sequence readout section reads out the noise sequences stored in the plurality of memories so that the code periods are prime numbers of each other. A sequence-adding section adds the noise sequences read out in parallel from the plurality of memories by means of the noise sequence readout section, thereby outputting the addition result as a series of noise sequences. In a CN controller, a setting section sets a value to determine an amplitude of a digital modulation signal row to a register. A multiplying section multiplies the setting value of the register by the to-be-inputted digital modulation signal row. A CN adding section adds a series of noise sequences outputted from the sequence adding section of the noise sequence generator to an output of the multiplying section, and outputs the addition result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.