Multiuser detection of differing data rate signals
AssigneeInterDigital Technology Corporation
InventorsAlexander Reznik, Ariela Zeira
Life of this patent
Estimating the term…
Abstract
A first detector receives a received signal and extracts the data signals from the received signal. A hard decision converter converts soft symbols outputted by the first detector into hard symbols. An interference canceller extracts the voice signals from the received signal. A second detector is connected to the output of the interference canceller, and extracts the individual voice signals. The second detector is a different detector type than the first detector.
Claims25
A system for multiuser detection of a received signal, the received signal including voice signals and data signals, said system comprising:
- a first detector having an input to receive the received signal and an output, said first detector extracting the data signals from the received signal;
- a hard decision converter having an input connected to said first detector output and an output, said hard decision converter converting soft symbols output by said first detector into hard symbols;
- an interference canceller having a first input configured to receive the received signal and a second input connected to said hard decision converter output, and an output, said interference canceller canceling a contribution of the data signals from the received signal;
- and
- a second detector having an input connected to said interference canceller output, said second detector extracting individual voice signals, said second detector being a different detector type than said first detector.
A method for multiuser detection of a received signal, the received signal including voice signals and data signals, the method comprising the steps of:
- storing the received signal;
- detecting the data signals and extracting the data signals from the received signal;
- outputting the extracted data signals as soft symbols;
- converting the soft symbols into hard symbols;
- canceling the hard symbols from the stored received signal to extract the voice signals;
- and
- detecting the individual voice signals, wherein the first and second detecting steps are performed by different types of detectors.
A receiver comprising:
- an antenna for receiving a plurality of communication signals of differing power levels, the plurality of communication signals including a high power level group of signals and a low power level group of signals;
- a high data rate data detection device for detecting data of the high power level group of signals;
- an interference canceling device for receiving the detected data of the high power level group of signals and canceling a contribution of the high power level group detected data from the plurality of communication signals, as an interference canceled signal;
- and
- a low data rate data detection device for detecting data of the low power level group of signals from the interference canceled signal.
A wireless transmit/receive unit (WTRU) comprising:
- means for receiving a plurality of communication signals of differing power levels, the plurality of communication signals including a high power level group of signals and a low power level group of signals;
- means for detecting data of the high power level group of signals;
- high power level means for receiving the detected data of the high power level group of signals and canceling a contribution of the high power level group detected data from the plurality of communication signals, as an interference canceled signal;
- and
- low power level means for detecting data of the low power level group of signals from the interference canceled signal.
An integrated circuit comprising:
- an input for receiving a plurality of communication signals of differing power levels, the plurality of communication signals including a high power level group of signals and a low power level group of signals;
- a high data rate data detection device for detecting data of the high power level group of signals;
- an interference canceling device for receiving the detected data of the high power level group of signals and canceling a contribution of the high power level group detected data from the plurality of communication signals, as an interference canceled signal;
- and
- a low data rate data detection device for detecting data of the low power level group of signals from the interference canceled signal.
Dependencies are inferred from the claim text.