Low complexity detection in digital receivers
AssigneeSTMicroelectronics S.r.l.
InventorsLorena Simoni, Andrea Concil, Giuseppe Avellone, Piero Castoldi, Hisashi Kobayashi, Luca Fanucci, Riccardo Grasso
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Abstract
A receiver for receiving digital signals exposed to intersymbol interference as well as multiple access interference the method including linearly detecting said signals by combating said intersymbol interference by equalizing said received digital signals as well as mitigating said multiple access interference by detecting said digital signals by means of sliding window detection.
Claims46
A method of receiving digital signals exposed to intersymbol interference as well as multiple access interference, the method comprising:
- linearly detecting said signals by combating said intersymbol interference by equalizing said received digital signals;
- and
- mitigating said multiple access interference by detecting said digital signals by means of a sliding window detection.
A method of transmitting signals in a code division multiple access system, wherein said signals are digital signals exposed to intersymbol interference as well as multiple access interference, the method comprising arranging said signals in blocks including first and second data symbol blocks and a midamble therebetween.
A method of receiving digital signals exposed to intersymbol interference as well as multiple access interference, the method comprising:
- linearly detecting said signals by combating said intersymbol interference by equalizing said received digital signals, wherein said signals are digital signals arranged in blocks including first and second data symbol blocks and a midamble therebetween;
- and
- mitigating said multiple access interference by detecting said digital signals by means of a sliding window detection.
A method of receiving digital signals exposed to intersymbol interference as well as multiple access interference in a multiuser scenario including other active users, wherein said signals are digital signals subject to spreading by means of spreading factors and arranged in blocks including first and second data fields and a midamble therebetween, the method including the steps of:
- defining and storing a desired signal slot;
- extracting said midamble from the signal received and deriving therefrom at least one of a user parameters definition such as a channelization code and a spreading factor as well as estimates for all the other active users such as the number of active users in said slot and respective user parameters therefor;
- performing channel estimation by obtaining a detection matrix;
- demodulating said first data field;
- and
- demodulating said second data field.
A method of receiving digital signals exposed to intersymbol interference as well as multiple access interference, the method comprising detecting said signals by generating a detection matrix as a matrix structured to be decomposed into a plurality of identical submatrixes.
A receiver for receiving digital signals exposed to intersymbol interference as well as multiple access interference, the receiver comprising a linear detector for detecting said signals, said detector including an equalizer for combating said intersymbol interference by equalizing said received digital signals as well as mitigating said multiple access interference by detecting said digital signals by means of a sliding window detection.
A system for detecting signals in a code division multiple access system, wherein said signals are digital signals exposed to intersymbol interference as well as multiple access interference, wherein said signals are arranged in blocks including first and second data symbol blocks and a midamble therebetween.
A receiver for receiving digital signals exposed to intersymbol interference as well as multiple access interference, the receiver comprising a linear detector for detecting said signals, wherein said signals are digital signals arranged in blocks including first and second data symbol blocks and a midamble therebetween, said detector including an equalizer for combating said intersymbol interference by equalizing said received digital signals as well as mitigating said multiple access interference by detecting said digital signals by means of a sliding window detection.
A receiver for receiving digital signals exposed to intersymbol interference (ISI) as well as multiple access interference (MAI) in a multiuser scenario including other active users, wherein said signals are digital signals subject to spreading by means of spreading factors and arranged in blocks including first and second data fields and a midamble therebetween, the receiver including:
- a memory for storing a desired signal slot;
- an estimator for extracting said midamble from the signal received and deriving therefrom at least one of a user parameters definition such as a channelization code and a spreading factor as well as estimates for all the other active users such as the number of active users in said slot and respective user parameters therefor, said estimator performing channel estimation by obtaining at least one detection matrix;
- and
- a processing unit for demodulating said first data field, and said second data field.
Dependencies are inferred from the claim text.