Spread-spectrum channel sounding
US6269092A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 1999 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Jan 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/2628
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improvement to a spread-spectrum code-division-multiple-access system, using a channel sounding signal from a base station (BS) to provide initial transmitter power levels for remote stations (RS). The base station has a BS-spread-spectrum transmitter for transmitting BS-spread-spectrum signals at a first frequency and a BS-spread-spectrum receiver for receiving RS-spread-spectrum signals at a second frequency. The RS-spread-spectrum signals are transmitted by the remote stations at the second frequency. The BS-spread-spectrum signals at the first frequency are outside the correlation bandwidth of the RS-spread-spectrum signals at the second frequency. The base station has a BS transmitter for transmitting a BS-channel-sounding signal at the same carrier frequency being used by the remote stations to transmit a spread-spectrum signal to the base station. The bandwidth of the BS-channel-sounding signal is much of the bandwidth of the BS-spread-spectrum signal. Each of the remote stations has an RS receiver, for receiving the BS-channel-sounding signal at the second frequency. Each RS receiver includes an RS demodulator for tracking the BS-channel-sounding signal and outputting an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.